fix flux

- Characters modal: new eye button on character cards to view the image
full size
- Mention chip menu: tapping the avatar thumbnail also opens the
full-size view
- Card buttons (view/edit/delete) are always visible on touch devices
instead of hover-only
- Mobile: Characters open in a bottom drawer with a 2-column grid,
matching the other settings drawers
- All mobile drawers now have a close (X) button
- All mobile drawers can be pulled down to dismiss - the sheet follows
your thumb and closes from where you let go

.sqlx/query-62b3e2e058331a6819acd98c634b3bf2d10aa38d43b49ab69fb8637497beec2f.json

@@ -1,6 +1,6 @@
 {
   "db_name": "MySQL",
-  "query": "\nSELECT\n  users.token as `user_token: UserToken`,\n  users.username,\n  users.display_name,\n  users.email_address,\n  users.user_role_slug,\n  users.is_banned,\n  user_roles.can_ban_users\nFROM user_sessions\nINNER JOIN users\n  ON users.token = user_sessions.user_token\nLEFT OUTER JOIN user_roles\n  ON users.user_role_slug = user_roles.slug\nWHERE user_sessions.token = ?\n  AND user_sessions.deleted_at IS NULL\n  AND users.user_deleted_at IS NULL\n  AND users.mod_deleted_at IS NULL\nLIMIT 1\n    ",
+  "query": "\nSELECT\n  users.token as `user_token: UserToken`,\n  users.username,\n  users.display_name,\n  users.email_address,\n  users.user_role_slug,\n  users.is_banned,\n  user_roles.can_ban_users,\n  users.maybe_feature_flags,\n  api_keys.token as `api_key_token: ApiKeyToken`\nFROM api_keys\nINNER JOIN users\n  ON users.token = api_keys.owner_user_token\nLEFT OUTER JOIN user_roles\n  ON users.user_role_slug = user_roles.slug\nWHERE api_keys.api_key = ?\n  AND api_keys.maybe_deleted_at IS NULL\n  AND users.user_deleted_at IS NULL\n  AND users.mod_deleted_at IS NULL\nLIMIT 1\n    ",
   "describe": {
     "columns": [
       {
@@ -72,6 +72,26 @@
           "char_set": 63,
           "max_size": 1
         }
+      },
+      {
+        "ordinal": 7,
+        "name": "maybe_feature_flags",
+        "type_info": {
+          "type": "VarString",
+          "flags": "BINARY",
+          "char_set": 224,
+          "max_size": 1020
+        }
+      },
+      {
+        "ordinal": 8,
+        "name": "api_key_token: ApiKeyToken",
+        "type_info": {
+          "type": "VarString",
+          "flags": "NOT_NULL | UNIQUE_KEY | BINARY | NO_DEFAULT_VALUE",
+          "char_set": 224,
+          "max_size": 128
+        }
       }
     ],
     "parameters": {
@@ -84,8 +104,10 @@
       false,
       false,
       false,
-      true
+      true,
+      true,
+      false
     ]
   },
-  "hash": "c77126adb36f9e2f0248720eb4d8c1cd9d14719f64a02678d8021e26addd2c18"
-}
+  "hash": "62b3e2e058331a6819acd98c634b3bf2d10aa38d43b49ab69fb8637497beec2f"
+}

.sqlx/query-cf2794c87868e77dfaa45bdbe630ae276dbb8c2d041442ba465af0b7a6d61af6.json

@@ -1,6 +1,6 @@
 {
   "db_name": "MySQL",
-  "query": "\nSELECT\n  users.token as `user_token: UserToken`,\n  users.username,\n  users.display_name,\n  users.email_address,\n  users.user_role_slug,\n  users.is_banned,\n  user_roles.can_ban_users,\n  api_keys.token as `api_key_token: ApiKeyToken`\nFROM api_keys\nINNER JOIN users\n  ON users.token = api_keys.owner_user_token\nLEFT OUTER JOIN user_roles\n  ON users.user_role_slug = user_roles.slug\nWHERE api_keys.api_key = ?\n  AND api_keys.maybe_deleted_at IS NULL\n  AND users.user_deleted_at IS NULL\n  AND users.mod_deleted_at IS NULL\nLIMIT 1\n    ",
+  "query": "\nSELECT\n  users.token as `user_token: UserToken`,\n  users.username,\n  users.display_name,\n  users.email_address,\n  users.user_role_slug,\n  users.is_banned,\n  user_roles.can_ban_users,\n  users.maybe_feature_flags\nFROM user_sessions\nINNER JOIN users\n  ON users.token = user_sessions.user_token\nLEFT OUTER JOIN user_roles\n  ON users.user_role_slug = user_roles.slug\nWHERE user_sessions.token = ?\n  AND user_sessions.deleted_at IS NULL\n  AND users.user_deleted_at IS NULL\n  AND users.mod_deleted_at IS NULL\nLIMIT 1\n    ",
   "describe": {
     "columns": [
       {
@@ -75,12 +75,12 @@
       },
       {
         "ordinal": 7,
-        "name": "api_key_token: ApiKeyToken",
+        "name": "maybe_feature_flags",
         "type_info": {
           "type": "VarString",
-          "flags": "NOT_NULL | UNIQUE_KEY | BINARY | NO_DEFAULT_VALUE",
+          "flags": "BINARY",
           "char_set": 224,
-          "max_size": 128
+          "max_size": 1020
         }
       }
     ],
@@ -95,8 +95,8 @@
       false,
       false,
       true,
-      false
+      true
     ]
   },
-  "hash": "9188e235caa439d50628333c2f4722b9f1a8f575c192d4d36a2039709c412ac0"
-}
+  "hash": "cf2794c87868e77dfaa45bdbe630ae276dbb8c2d041442ba465af0b7a6d61af6"
+}

crates/api_clients/artcraft/artcraft_router/src/api/router_video_model.rs

@@ -14,6 +14,12 @@ pub enum RouterVideoModel {
   #[serde(rename = "grok_imagine_video_1p5")]
   GrokImagineVideo1p5,
 
+  #[serde(rename = "flux_3")]
+  Flux3,
+
+  #[serde(rename = "flux_3_draft")]
+  Flux3Draft,
+
   #[serde(rename = "kling_1p6_pro")]
   Kling16Pro,
 
@@ -35,6 +41,9 @@ pub enum RouterVideoModel {
   #[serde(rename = "kling_3p0_pro")]
   Kling3p0Pro,
 
+  #[serde(rename = "minimax_h3")]
+  MinimaxH3,
+
   #[serde(rename = "seedance_1p0_lite")]
   Seedance10Lite,
 
@@ -149,4 +158,19 @@ mod tests {
     assert_serde_round_trip(RouterVideoModel::ViduQ3, "vidu_q3");
     assert_serde_round_trip(RouterVideoModel::ViduQ3Turbo, "vidu_q3_turbo");
   }
+
+  #[test]
+  fn flux_3_variants_serialize() {
+    // NB: These strings must match `CommonVideoModel` — the two enums convert
+    // via serde string round-trip in the omni handlers.
+    assert_serde_round_trip(RouterVideoModel::Flux3, "flux_3");
+    assert_serde_round_trip(RouterVideoModel::Flux3Draft, "flux_3_draft");
+  }
+
+  #[test]
+  fn minimax_h3_serializes() {
+    // NB: This string must match `CommonVideoModel` — the two enums convert
+    // via serde string round-trip in the omni handlers.
+    assert_serde_round_trip(RouterVideoModel::MinimaxH3, "minimax_h3");
+  }
 }

crates/api_clients/artcraft/artcraft_router/src/generate/generate_video/generate_video_request_builder.rs

@@ -43,6 +43,9 @@ use crate::generate::generate_video::providers::artcraft::veo_3_fast::build::bui
 use crate::generate::generate_video::providers::artcraft::veo_3p1::build::build_artcraft_veo_3p1;
 use crate::generate::generate_video::providers::artcraft::veo_3p1_fast::build::build_artcraft_veo_3p1_fast;
 use crate::generate::generate_video::providers::artcraft::veo_3p1_lite::build::build_artcraft_veo_3p1_lite;
+use crate::generate::generate_video::providers::artcraft::flux_3::build::build_artcraft_flux_3;
+use crate::generate::generate_video::providers::artcraft::flux_3_draft::build::build_artcraft_flux_3_draft;
+use crate::generate::generate_video::providers::artcraft::minimax_h3::build::build_artcraft_minimax_h3;
 use crate::generate::generate_video::providers::artcraft::vidu_q3::build::build_artcraft_vidu_q3;
 use crate::generate::generate_video::providers::artcraft::vidu_q3_turbo::build::build_artcraft_vidu_q3_turbo;
 use crate::generate::generate_video::providers::kinovi::happy_horse_1p0::build::build_kinovi_happy_horse_1p0;
@@ -68,6 +71,9 @@ use crate::generate::generate_video::providers::fal::veo_3_fast::build::build_fa
 use crate::generate::generate_video::providers::fal::veo_3p1::build::build_fal_veo_3p1;
 use crate::generate::generate_video::providers::fal::veo_3p1_fast::build::build_fal_veo_3p1_fast;
 use crate::generate::generate_video::providers::fal::veo_3p1_lite::build::build_fal_veo_3p1_lite;
+use crate::generate::generate_video::providers::fal::flux_3::build::build_fal_flux_3;
+use crate::generate::generate_video::providers::fal::flux_3_draft::build::build_fal_flux_3_draft;
+use crate::generate::generate_video::providers::fal::minimax_h3::build::build_fal_minimax_h3;
 use crate::generate::generate_video::providers::fal::vidu_q3::build::build_fal_vidu_q3;
 use crate::generate::generate_video::providers::fal::vidu_q3_turbo::build::build_fal_vidu_q3_turbo;
 use crate::generate::generate_video::providers::kinovi::seedance_2p0_fast::build::build_kinovi_seedance_2p0_fast;
@@ -172,6 +178,8 @@ impl GenerateVideoRequestBuilder {
       // Artcraft
       (RouterProvider::Artcraft, RouterVideoModel::GrokImagineVideo) => build_artcraft_grok_imagine_video(self),
       (RouterProvider::Artcraft, RouterVideoModel::GrokImagineVideo1p5) => build_artcraft_grok_imagine_video_1p5(self),
+      (RouterProvider::Artcraft, RouterVideoModel::Flux3) => build_artcraft_flux_3(self),
+      (RouterProvider::Artcraft, RouterVideoModel::Flux3Draft) => build_artcraft_flux_3_draft(self),
       (RouterProvider::Artcraft, RouterVideoModel::HappyHorse1p0) => build_artcraft_happy_horse_1p0(self),
       (RouterProvider::Artcraft, RouterVideoModel::Kling16Pro) => build_artcraft_kling_1_6_pro(self),
       (RouterProvider::Artcraft, RouterVideoModel::Kling21Master) => build_artcraft_kling_2_1_master(self),
@@ -180,6 +188,7 @@ impl GenerateVideoRequestBuilder {
       (RouterProvider::Artcraft, RouterVideoModel::Kling2p6Pro) => build_artcraft_kling_2_6_pro(self),
       (RouterProvider::Artcraft, RouterVideoModel::Kling3p0Pro) => build_artcraft_kling_3p0_pro(self),
       (RouterProvider::Artcraft, RouterVideoModel::Kling3p0Standard) => build_artcraft_kling_3p0_standard(self),
+      (RouterProvider::Artcraft, RouterVideoModel::MinimaxH3) => build_artcraft_minimax_h3(self),
       (RouterProvider::Artcraft, RouterVideoModel::Seedance2p0) => build_artcraft_seedance_2p0(self),
       (RouterProvider::Artcraft, RouterVideoModel::Seedance2p0Fast) => build_artcraft_seedance_2p0_fast(self),
       (RouterProvider::Artcraft, RouterVideoModel::Seedance2p0Ultra) => build_artcraft_seedance_2p0_u(self),
@@ -207,6 +216,8 @@ impl GenerateVideoRequestBuilder {
       (RouterProvider::Artcraft, RouterVideoModel::ViduQ3) => build_artcraft_vidu_q3(self),
       (RouterProvider::Artcraft, RouterVideoModel::ViduQ3Turbo) => build_artcraft_vidu_q3_turbo(self),
       // Fal
+      (RouterProvider::Fal, RouterVideoModel::Flux3) => build_fal_flux_3(self),
+      (RouterProvider::Fal, RouterVideoModel::Flux3Draft) => build_fal_flux_3_draft(self),
       (RouterProvider::Fal, RouterVideoModel::Kling16Pro) => build_fal_kling_1_6_pro(self),
       (RouterProvider::Fal, RouterVideoModel::Kling21Master) => build_fal_kling_2_1_master(self),
       (RouterProvider::Fal, RouterVideoModel::Kling21Pro) => build_fal_kling_2_1_pro(self),
@@ -214,6 +225,7 @@ impl GenerateVideoRequestBuilder {
       (RouterProvider::Fal, RouterVideoModel::Kling2p6Pro) => build_fal_kling_2_6_pro(self),
       (RouterProvider::Fal, RouterVideoModel::Kling3p0Pro) => build_fal_kling_3p0_pro(self),
       (RouterProvider::Fal, RouterVideoModel::Kling3p0Standard) => build_fal_kling_3p0_standard(self),
+      (RouterProvider::Fal, RouterVideoModel::MinimaxH3) => build_fal_minimax_h3(self),
       (RouterProvider::Fal, RouterVideoModel::Seedance10Lite) => build_fal_seedance_1p0_lite(self),
       (RouterProvider::Fal, RouterVideoModel::Seedance1p5Pro) => build_fal_seedance_1p5_pro(self),
       (RouterProvider::Fal, RouterVideoModel::Sora2) => build_fal_sora_2(self),

crates/api_clients/artcraft/artcraft_router/src/generate/generate_video/providers/artcraft/flux_3/build.rs

@@ -0,0 +1,64 @@
+use enums::common::generation::common_video_model::CommonVideoModel as CommonVideoModelEnum;
+
+use crate::client::request_mismatch_mitigation_strategy::RequestMismatchMitigationStrategy;
+use crate::errors::artcraft_router_error::ArtcraftRouterError;
+use crate::errors::client_error::ClientError;
+use crate::generate::generate_video::generate_video_request_builder::GenerateVideoRequestBuilder;
+use crate::generate::generate_video::providers::artcraft::build_common::{
+  build_artcraft_omni_video_request, SupportedResolutions, UltraWideSupport,
+};
+use crate::generate::generate_video::providers::artcraft::flux_3::request::ArtcraftFlux3RequestState;
+use crate::generate::generate_video::video_generation_draft_or_request::VideoGenerationDraftOrRequest;
+use crate::generate::generate_video::video_generation_request::VideoGenerationRequest;
+
+pub fn build_artcraft_flux_3(builder: GenerateVideoRequestBuilder) -> Result<VideoGenerationDraftOrRequest, ArtcraftRouterError> {
+  let state = build_artcraft_flux_3_state(builder)?;
+  Ok(VideoGenerationDraftOrRequest::Request(VideoGenerationRequest::ArtcraftFlux3(state)))
+}
+
+pub(crate) fn build_artcraft_flux_3_state(mut builder: GenerateVideoRequestBuilder) -> Result<ArtcraftFlux3RequestState, ArtcraftRouterError> {
+  // Flux 3 accepts 5–20 seconds — wider than the generic helper's window —
+  // so pre-plan the duration and reapply it after (the helper would clamp
+  // 16–20s down). Also preserve generate_audio (the helper hardcodes None on
+  // its output).
+  let strategy = builder.request_mismatch_mitigation_strategy;
+  let final_duration = plan_flux_3_duration(builder.duration_seconds, strategy)?;
+  builder.duration_seconds = final_duration;
+
+  let generate_audio = builder.generate_audio;
+  let mut request = build_artcraft_omni_video_request(
+    builder,
+    CommonVideoModelEnum::Flux3,
+    SupportedResolutions::Full,
+    UltraWideSupport::Supported,
+  )?;
+  request.generate_audio = generate_audio;
+  request.duration_seconds = final_duration;
+
+  Ok(ArtcraftFlux3RequestState { request })
+}
+
+/// Flux 3 durations: 5–20 seconds (unset lets the model pick).
+pub(crate) fn plan_flux_3_duration(
+  duration_seconds: Option<u16>,
+  strategy: RequestMismatchMitigationStrategy,
+) -> Result<Option<u16>, ArtcraftRouterError> {
+  const MIN: u16 = 5;
+  const MAX: u16 = 20;
+  match duration_seconds {
+    None => Ok(None),
+    Some(d) if (MIN..=MAX).contains(&d) => Ok(Some(d)),
+    Some(other) => match strategy {
+      RequestMismatchMitigationStrategy::ErrorOut => {
+        Err(ArtcraftRouterError::Client(ClientError::ModelDoesNotSupportOption {
+          field: "duration_seconds",
+          value: format!("{}", other),
+        }))
+      }
+      RequestMismatchMitigationStrategy::PayMoreUpgrade
+      | RequestMismatchMitigationStrategy::PayLessDowngrade => {
+        Ok(Some(other.clamp(MIN, MAX)))
+      }
+    },
+  }
+}

crates/api_clients/artcraft/artcraft_router/src/generate/generate_video/providers/artcraft/flux_3/cost.rs

@@ -0,0 +1,123 @@
+use enums::common::generation::common_resolution::CommonResolution as CommonResolutionEnum;
+
+use crate::generate::generate_video::providers::artcraft::flux_3::request::ArtcraftFlux3RequestState;
+use crate::generate::generate_video::video_generation_cost_estimate::VideoGenerationCostEstimate;
+
+/// Per-second rates in hundredths of a US cent.
+const LOW_RES_RATE_HUNDREDTH_CENTS_PER_SEC: u64 = 1_955;
+const HIGH_RES_RATE_HUNDREDTH_CENTS_PER_SEC: u64 = 3_335;
+
+#[derive(Clone, Debug)]
+pub struct ArtcraftFlux3CostState {
+  pub duration_seconds: u64,
+  pub is_1080p: bool,
+}
+
+impl ArtcraftFlux3CostState {
+  pub fn from_request(request: &ArtcraftFlux3RequestState) -> Self {
+    Self {
+      // Flux 3 defaults None → 5s (the shortest selectable duration).
+      duration_seconds: request.request.duration_seconds.map(u64::from).unwrap_or(5),
+      is_1080p: is_1080p(request.request.resolution),
+    }
+  }
+
+  pub fn estimate_cost(&self) -> VideoGenerationCostEstimate {
+    let rate = if self.is_1080p {
+      HIGH_RES_RATE_HUNDREDTH_CENTS_PER_SEC
+    } else {
+      LOW_RES_RATE_HUNDREDTH_CENTS_PER_SEC
+    };
+    // Round up to the next whole cent.
+    let cost_in_usd_cents = (rate * self.duration_seconds).div_ceil(100);
+
+    VideoGenerationCostEstimate {
+      cost_in_credits: Some(cost_in_usd_cents),
+      cost_in_usd_cents: Some(cost_in_usd_cents),
+      is_free: false,
+      is_unlimited: false,
+      is_rate_limited: false,
+      has_watermark: false,
+      failures_are_refunded: None,
+    }
+  }
+}
+
+/// Flux 3 renders 720p or 1080p; 1080p and above land on the higher tier,
+/// while 720p and below render at 720p. The default (unset) resolution is
+/// 720p.
+fn is_1080p(resolution: Option<CommonResolutionEnum>) -> bool {
+  match resolution {
+    None => false, // defaults to 720p
+    Some(CommonResolutionEnum::TenEightyP)
+    | Some(CommonResolutionEnum::OneK)
+    | Some(CommonResolutionEnum::TwoK)
+    | Some(CommonResolutionEnum::ThreeK)
+    | Some(CommonResolutionEnum::FourK) => true,
+    Some(CommonResolutionEnum::HalfK)
+    | Some(CommonResolutionEnum::FourEightyP)
+    | Some(CommonResolutionEnum::SevenTwentyP) => false,
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use enums::common::generation::common_resolution::CommonResolution as CommonResolutionEnum;
+
+  use crate::api::router_provider::RouterProvider;
+  use crate::api::router_resolution::RouterResolution;
+  use crate::api::router_video_model::RouterVideoModel;
+  use crate::generate::generate_video::generate_video_request_builder::GenerateVideoRequestBuilder;
+  use crate::generate::generate_video::providers::artcraft::flux_3::build::build_artcraft_flux_3_state;
+  use crate::generate::generate_video::providers::artcraft::flux_3::cost::ArtcraftFlux3CostState;
+
+  #[test]
+  fn default_settings_5s_is_98() { assert_eq!(cost_cents(Some(5), None), 98); }
+
+  #[test]
+  fn default_duration_is_5s() { assert_eq!(cost_cents(None, None), 98); }
+
+  #[test]
+  fn low_res_20s_is_391() { assert_eq!(cost_cents(Some(20), Some(RouterResolution::SevenTwentyP)), 391); }
+
+  #[test]
+  fn four_eighty_p_lands_on_low_tier() {
+    assert_eq!(cost_cents(Some(5), Some(RouterResolution::FourEightyP)), 98);
+  }
+
+  #[test]
+  fn high_res_5s_is_167() { assert_eq!(cost_cents(Some(5), Some(RouterResolution::TenEightyP)), 167); }
+
+  #[test]
+  fn high_res_10s_is_334() { assert_eq!(cost_cents(Some(10), Some(RouterResolution::TenEightyP)), 334); }
+
+  #[test]
+  fn odd_duration_rounds_up_to_whole_cents() {
+    // 7s low res: 1955 × 7 = 13685 hundredth-cents → 137 cents.
+    assert_eq!(cost_cents(Some(7), None), 137);
+  }
+
+  #[test]
+  fn resolution_classifier_defaults_720p() {
+    assert!(!super::is_1080p(None));
+    assert!(super::is_1080p(Some(CommonResolutionEnum::TenEightyP)));
+    assert!(!super::is_1080p(Some(CommonResolutionEnum::SevenTwentyP)));
+    assert!(!super::is_1080p(Some(CommonResolutionEnum::FourEightyP)));
+  }
+
+  fn cost_cents(
+    duration_seconds: Option<u16>,
+    resolution: Option<RouterResolution>,
+  ) -> u64 {
+    let b = GenerateVideoRequestBuilder {
+      model: RouterVideoModel::Flux3,
+      provider: RouterProvider::Artcraft,
+      prompt: Some("test".to_string()),
+      duration_seconds,
+      resolution,
+      ..Default::default()
+    };
+    let state = build_artcraft_flux_3_state(b).unwrap();
+    ArtcraftFlux3CostState::from_request(&state).estimate_cost().cost_in_usd_cents.unwrap()
+  }
+}

crates/api_clients/artcraft/artcraft_router/src/generate/generate_video/providers/artcraft/flux_3/mod.rs

@@ -0,0 +1,3 @@
+pub mod build;
+pub mod cost;
+pub mod request;

crates/api_clients/artcraft/artcraft_router/src/generate/generate_video/providers/artcraft/flux_3/request.rs

@@ -0,0 +1,104 @@
+use artcraft_api_defs::omni_gen::cost_and_generate_requests::omni_gen_video_cost_and_generate_request::OmniGenVideoCostAndGenerateRequest;
+
+use crate::client::router_artcraft_client::RouterArtcraftClient;
+use crate::errors::artcraft_router_error::ArtcraftRouterError;
+use crate::generate::generate_video::generate_video_response::GenerateVideoResponse;
+use crate::generate::generate_video::providers::artcraft::request_common::send_artcraft_omni_video_request;
+
+#[derive(Clone, Debug)]
+pub struct ArtcraftFlux3RequestState {
+  pub request: OmniGenVideoCostAndGenerateRequest,
+}
+
+impl ArtcraftFlux3RequestState {
+  pub async fn send(&self, client: &RouterArtcraftClient) -> Result<GenerateVideoResponse, ArtcraftRouterError> {
+    send_artcraft_omni_video_request(&self.request, client).await
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use tokens::tokens::media_files::MediaFileToken;
+
+  use artcraft_client::credentials::storyteller_credential_set::StorytellerCredentialSet;
+  use artcraft_client::utils::api_host::ApiHost;
+  use test_data::web::image_media_tokens::JUNO_AT_LAKE_PRODUCTION_MEDIA_TOKEN;
+
+  use crate::api::image_ref::ImageRef;
+  use crate::api::router_aspect_ratio::RouterAspectRatio;
+  use crate::api::router_provider::RouterProvider;
+  use crate::api::router_video_model::RouterVideoModel;
+  use crate::client::router_artcraft_client::RouterArtcraftClient;
+  use crate::client::router_client::RouterClient;
+  use crate::generate::generate_video::generate_video_request_builder::GenerateVideoRequestBuilder;
+  use crate::generate::generate_video::generate_video_response::GenerateVideoResponse;
+  use crate::generate::generate_video::video_generation_draft_or_request::VideoGenerationDraftOrRequest;
+
+  #[tokio::test]
+  #[ignore] // sends a real generation to the Artcraft backend, incurs cost
+  async fn text_to_video() {
+    let response = run_pipeline(GenerateVideoRequestBuilder {
+      prompt: Some("A red kite soaring over coastal cliffs, cinematic.".to_string()),
+      aspect_ratio: Some(RouterAspectRatio::WideSixteenByNine),
+      ..artcraft_builder()
+    }).await;
+    assert!(matches!(response, GenerateVideoResponse::Artcraft(_)));
+    assert_eq!(1, 2, "Inspect output above");
+  }
+
+  #[tokio::test]
+  #[ignore] // sends a real generation to the Artcraft backend, incurs cost
+  async fn keyframe_start_frame() {
+    let response = run_pipeline(GenerateVideoRequestBuilder {
+      prompt: Some("The dog stands up and walks toward the lake.".to_string()),
+      start_frame: Some(ImageRef::MediaFileToken(MediaFileToken::new(JUNO_AT_LAKE_PRODUCTION_MEDIA_TOKEN.to_string()))),
+      ..artcraft_builder()
+    }).await;
+    assert!(matches!(response, GenerateVideoResponse::Artcraft(_)));
+    assert_eq!(1, 2, "Inspect output above");
+  }
+
+  // ── Helpers ──
+
+  fn artcraft_builder() -> GenerateVideoRequestBuilder {
+    GenerateVideoRequestBuilder {
+      model: RouterVideoModel::Flux3,
+      provider: RouterProvider::Artcraft,
+      duration_seconds: Some(5),
+      video_batch_count: Some(1),
+      ..Default::default()
+    }
+  }
+
+  fn get_artcraft_client() -> RouterClient {
+    let cookies = std::fs::read_to_string("/Users/bt/Artcraft/credentials/artcraft_cookies.txt")
+      .expect("Failed to read artcraft cookies");
+    let cookies = cookies.trim().to_string();
+    let credentials = StorytellerCredentialSet::parse_multi_cookie_header(&cookies)
+      .expect("Failed to parse cookies")
+      .expect("No credentials found");
+    RouterClient::Artcraft(RouterArtcraftClient::new(ApiHost::Storyteller, credentials))
+  }
+
+  async fn run_pipeline(builder: GenerateVideoRequestBuilder) -> GenerateVideoResponse {
+    let client = get_artcraft_client();
+
+    let draft_or_request = builder.build2().expect("build2 should succeed");
+    let request = match draft_or_request {
+      VideoGenerationDraftOrRequest::Request(r) => r,
+      _ => panic!("expected Request variant (Artcraft skips draft)"),
+    };
+
+    let response = request.send_request(&client).await.expect("send_request should succeed");
+
+    match &response {
+      GenerateVideoResponse::Artcraft(p) => {
+        println!("inference_job_token={:?}", p.inference_job_token);
+        println!("all_inference_job_tokens={:?}", p.all_inference_job_tokens);
+      }
+      other => println!("response: {:?}", other),
+    }
+
+    response
+  }
+}

crates/api_clients/artcraft/artcraft_router/src/generate/generate_video/providers/artcraft/flux_3_draft/build.rs

@@ -0,0 +1,37 @@
+use enums::common::generation::common_video_model::CommonVideoModel as CommonVideoModelEnum;
+
+use crate::errors::artcraft_router_error::ArtcraftRouterError;
+use crate::generate::generate_video::generate_video_request_builder::GenerateVideoRequestBuilder;
+use crate::generate::generate_video::providers::artcraft::build_common::{
+  build_artcraft_omni_video_request, SupportedResolutions, UltraWideSupport,
+};
+use crate::generate::generate_video::providers::artcraft::flux_3::build::plan_flux_3_duration;
+use crate::generate::generate_video::providers::artcraft::flux_3_draft::request::ArtcraftFlux3DraftRequestState;
+use crate::generate::generate_video::video_generation_draft_or_request::VideoGenerationDraftOrRequest;
+use crate::generate::generate_video::video_generation_request::VideoGenerationRequest;
+
+pub fn build_artcraft_flux_3_draft(builder: GenerateVideoRequestBuilder) -> Result<VideoGenerationDraftOrRequest, ArtcraftRouterError> {
+  let state = build_artcraft_flux_3_draft_state(builder)?;
+  Ok(VideoGenerationDraftOrRequest::Request(VideoGenerationRequest::ArtcraftFlux3Draft(state)))
+}
+
+pub(crate) fn build_artcraft_flux_3_draft_state(mut builder: GenerateVideoRequestBuilder) -> Result<ArtcraftFlux3DraftRequestState, ArtcraftRouterError> {
+  // Same duration handling as full-quality Flux 3: 5–20 seconds is wider than
+  // the generic helper's window, so pre-plan and reapply after. Also preserve
+  // generate_audio (the helper hardcodes None on its output).
+  let strategy = builder.request_mismatch_mitigation_strategy;
+  let final_duration = plan_flux_3_duration(builder.duration_seconds, strategy)?;
+  builder.duration_seconds = final_duration;
+
+  let generate_audio = builder.generate_audio;
+  let mut request = build_artcraft_omni_video_request(
+    builder,
+    CommonVideoModelEnum::Flux3Draft,
+    SupportedResolutions::Full,
+    UltraWideSupport::Supported,
+  )?;
+  request.generate_audio = generate_audio;
+  request.duration_seconds = final_duration;
+
+  Ok(ArtcraftFlux3DraftRequestState { request })
+}

crates/api_clients/artcraft/artcraft_router/src/generate/generate_video/providers/artcraft/flux_3_draft/cost.rs

@@ -0,0 +1,86 @@
+use crate::generate::generate_video::providers::artcraft::flux_3_draft::request::ArtcraftFlux3DraftRequestState;
+use crate::generate::generate_video::video_generation_cost_estimate::VideoGenerationCostEstimate;
+
+/// Per-second rate in hundredths of a US cent. Drafts always render 720p, so
+/// resolution does not affect the bill.
+const GENERATION_RATE_HUNDREDTH_CENTS_PER_SEC: u64 = 690;
+
+#[derive(Clone, Debug)]
+pub struct ArtcraftFlux3DraftCostState {
+  pub duration_seconds: u64,
+}
+
+impl ArtcraftFlux3DraftCostState {
+  pub fn from_request(request: &ArtcraftFlux3DraftRequestState) -> Self {
+    Self {
+      // Flux 3 Draft defaults None → 5s (the shortest selectable duration).
+      duration_seconds: request.request.duration_seconds.map(u64::from).unwrap_or(5),
+    }
+  }
+
+  pub fn estimate_cost(&self) -> VideoGenerationCostEstimate {
+    // Round up to the next whole cent.
+    let cost_in_usd_cents =
+      (GENERATION_RATE_HUNDREDTH_CENTS_PER_SEC * self.duration_seconds).div_ceil(100);
+
+    VideoGenerationCostEstimate {
+      cost_in_credits: Some(cost_in_usd_cents),
+      cost_in_usd_cents: Some(cost_in_usd_cents),
+      is_free: false,
+      is_unlimited: false,
+      is_rate_limited: false,
+      has_watermark: false,
+      failures_are_refunded: None,
+    }
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use crate::api::router_provider::RouterProvider;
+  use crate::api::router_resolution::RouterResolution;
+  use crate::api::router_video_model::RouterVideoModel;
+  use crate::generate::generate_video::generate_video_request_builder::GenerateVideoRequestBuilder;
+  use crate::generate::generate_video::providers::artcraft::flux_3_draft::build::build_artcraft_flux_3_draft_state;
+  use crate::generate::generate_video::providers::artcraft::flux_3_draft::cost::ArtcraftFlux3DraftCostState;
+
+  #[test]
+  fn default_settings_5s_is_35() { assert_eq!(cost_cents(Some(5), None), 35); }
+
+  #[test]
+  fn default_duration_is_5s() { assert_eq!(cost_cents(None, None), 35); }
+
+  #[test]
+  fn twenty_seconds_is_138() { assert_eq!(cost_cents(Some(20), None), 138); }
+
+  /// Drafts always render 720p; a requested resolution does not change the
+  /// bill.
+  #[test]
+  fn cost_ignores_resolution() {
+    for resolution in [None, Some(RouterResolution::SevenTwentyP), Some(RouterResolution::TenEightyP)] {
+      assert_eq!(cost_cents(Some(5), resolution), 35, "resolution={resolution:?}");
+    }
+  }
+
+  #[test]
+  fn odd_duration_rounds_up_to_whole_cents() {
+    // 7s generation: 690 × 7 = 4830 hundredth-cents → 49 cents.
+    assert_eq!(cost_cents(Some(7), None), 49);
+  }
+
+  fn cost_cents(
+    duration_seconds: Option<u16>,
+    resolution: Option<RouterResolution>,
+  ) -> u64 {
+    let b = GenerateVideoRequestBuilder {
+      model: RouterVideoModel::Flux3Draft,
+      provider: RouterProvider::Artcraft,
+      prompt: Some("test".to_string()),
+      duration_seconds,
+      resolution,
+      ..Default::default()
+    };
+    let state = build_artcraft_flux_3_draft_state(b).unwrap();
+    ArtcraftFlux3DraftCostState::from_request(&state).estimate_cost().cost_in_usd_cents.unwrap()
+  }
+}

crates/api_clients/artcraft/artcraft_router/src/generate/generate_video/providers/artcraft/flux_3_draft/mod.rs

@@ -0,0 +1,3 @@
+pub mod build;
+pub mod cost;
+pub mod request;

crates/api_clients/artcraft/artcraft_router/src/generate/generate_video/providers/artcraft/flux_3_draft/request.rs

@@ -0,0 +1,88 @@
+use artcraft_api_defs::omni_gen::cost_and_generate_requests::omni_gen_video_cost_and_generate_request::OmniGenVideoCostAndGenerateRequest;
+
+use crate::client::router_artcraft_client::RouterArtcraftClient;
+use crate::errors::artcraft_router_error::ArtcraftRouterError;
+use crate::generate::generate_video::generate_video_response::GenerateVideoResponse;
+use crate::generate::generate_video::providers::artcraft::request_common::send_artcraft_omni_video_request;
+
+#[derive(Clone, Debug)]
+pub struct ArtcraftFlux3DraftRequestState {
+  pub request: OmniGenVideoCostAndGenerateRequest,
+}
+
+impl ArtcraftFlux3DraftRequestState {
+  pub async fn send(&self, client: &RouterArtcraftClient) -> Result<GenerateVideoResponse, ArtcraftRouterError> {
+    send_artcraft_omni_video_request(&self.request, client).await
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use artcraft_client::credentials::storyteller_credential_set::StorytellerCredentialSet;
+  use artcraft_client::utils::api_host::ApiHost;
+
+  use crate::api::router_aspect_ratio::RouterAspectRatio;
+  use crate::api::router_provider::RouterProvider;
+  use crate::api::router_video_model::RouterVideoModel;
+  use crate::client::router_artcraft_client::RouterArtcraftClient;
+  use crate::client::router_client::RouterClient;
+  use crate::generate::generate_video::generate_video_request_builder::GenerateVideoRequestBuilder;
+  use crate::generate::generate_video::generate_video_response::GenerateVideoResponse;
+  use crate::generate::generate_video::video_generation_draft_or_request::VideoGenerationDraftOrRequest;
+
+  #[tokio::test]
+  #[ignore] // sends a real generation to the Artcraft backend, incurs cost
+  async fn text_to_video() {
+    let response = run_pipeline(GenerateVideoRequestBuilder {
+      prompt: Some("A red kite soaring over coastal cliffs, cinematic.".to_string()),
+      aspect_ratio: Some(RouterAspectRatio::WideSixteenByNine),
+      ..artcraft_builder()
+    }).await;
+    assert!(matches!(response, GenerateVideoResponse::Artcraft(_)));
+    assert_eq!(1, 2, "Inspect output above");
+  }
+
+  // ── Helpers ──
+
+  fn artcraft_builder() -> GenerateVideoRequestBuilder {
+    GenerateVideoRequestBuilder {
+      model: RouterVideoModel::Flux3Draft,
+      provider: RouterProvider::Artcraft,
+      duration_seconds: Some(5),
+      video_batch_count: Some(1),
+      ..Default::default()
+    }
+  }
+
+  fn get_artcraft_client() -> RouterClient {
+    let cookies = std::fs::read_to_string("/Users/bt/Artcraft/credentials/artcraft_cookies.txt")
+      .expect("Failed to read artcraft cookies");
+    let cookies = cookies.trim().to_string();
+    let credentials = StorytellerCredentialSet::parse_multi_cookie_header(&cookies)
+      .expect("Failed to parse cookies")
+      .expect("No credentials found");
+    RouterClient::Artcraft(RouterArtcraftClient::new(ApiHost::Storyteller, credentials))
+  }
+
+  async fn run_pipeline(builder: GenerateVideoRequestBuilder) -> GenerateVideoResponse {
+    let client = get_artcraft_client();
+
+    let draft_or_request = builder.build2().expect("build2 should succeed");
+    let request = match draft_or_request {
+      VideoGenerationDraftOrRequest::Request(r) => r,
+      _ => panic!("expected Request variant (Artcraft skips draft)"),
+    };
+
+    let response = request.send_request(&client).await.expect("send_request should succeed");
+
+    match &response {
+      GenerateVideoResponse::Artcraft(p) => {
+        println!("inference_job_token={:?}", p.inference_job_token);
+        println!("all_inference_job_tokens={:?}", p.all_inference_job_tokens);
+      }
+      other => println!("response: {:?}", other),
+    }
+
+    response
+  }
+}

crates/api_clients/artcraft/artcraft_router/src/generate/generate_video/providers/artcraft/minimax_h3/build.rs

@@ -0,0 +1,25 @@
+use enums::common::generation::common_video_model::CommonVideoModel as CommonVideoModelEnum;
+
+use crate::errors::artcraft_router_error::ArtcraftRouterError;
+use crate::generate::generate_video::generate_video_request_builder::GenerateVideoRequestBuilder;
+use crate::generate::generate_video::providers::artcraft::build_common::{
+  build_artcraft_omni_video_request, SupportedResolutions, UltraWideSupport,
+};
+use crate::generate::generate_video::providers::artcraft::minimax_h3::request::ArtcraftMinimaxH3RequestState;
+use crate::generate::generate_video::video_generation_draft_or_request::VideoGenerationDraftOrRequest;
+use crate::generate::generate_video::video_generation_request::VideoGenerationRequest;
+
+pub fn build_artcraft_minimax_h3(builder: GenerateVideoRequestBuilder) -> Result<VideoGenerationDraftOrRequest, ArtcraftRouterError> {
+  let state = build_artcraft_minimax_h3_state(builder)?;
+  Ok(VideoGenerationDraftOrRequest::Request(VideoGenerationRequest::ArtcraftMinimaxH3(state)))
+}
+
+pub(crate) fn build_artcraft_minimax_h3_state(builder: GenerateVideoRequestBuilder) -> Result<ArtcraftMinimaxH3RequestState, ArtcraftRouterError> {
+  let request = build_artcraft_omni_video_request(
+    builder,
+    CommonVideoModelEnum::MinimaxH3,
+    SupportedResolutions::Full,
+    UltraWideSupport::Supported,
+  )?;
+  Ok(ArtcraftMinimaxH3RequestState { request })
+}

crates/api_clients/artcraft/artcraft_router/src/generate/generate_video/providers/artcraft/minimax_h3/cost.rs

@@ -0,0 +1,158 @@
+use enums::common::generation::common_resolution::CommonResolution as CommonResolutionEnum;
+
+use crate::generate::generate_video::providers::artcraft::minimax_h3::request::ArtcraftMinimaxH3RequestState;
+use crate::generate::generate_video::video_generation_cost_estimate::VideoGenerationCostEstimate;
+
+/// Per-second rates in hundredths of a US cent.
+const LOW_RES_RATE_HUNDREDTH_CENTS_PER_SEC: u64 = 1_840;
+const HIGH_RES_RATE_HUNDREDTH_CENTS_PER_SEC: u64 = 2_990;
+
+/// The first 5 reference images are included; each additional image bills a
+/// flat fee (in hundredths of a US cent).
+const INCLUDED_REFERENCE_IMAGES: u64 = 5;
+const EXTRA_REFERENCE_IMAGE_HUNDREDTH_CENTS: u64 = 920;
+
+#[derive(Clone, Debug)]
+pub struct ArtcraftMinimaxH3CostState {
+  pub duration_seconds: u64,
+  pub is_2k: bool,
+  pub reference_image_count: u64,
+}
+
+impl ArtcraftMinimaxH3CostState {
+  pub fn from_request(request: &ArtcraftMinimaxH3RequestState) -> Self {
+    Self {
+      // MiniMax H3 defaults None → 5s.
+      duration_seconds: request.request.duration_seconds.map(u64::from).unwrap_or(5),
+      is_2k: is_2k(request.request.resolution),
+      reference_image_count: request.request.reference_image_media_tokens
+        .as_ref()
+        .map_or(0, |tokens| tokens.len() as u64),
+    }
+  }
+
+  pub fn estimate_cost(&self) -> VideoGenerationCostEstimate {
+    let rate = if self.is_2k {
+      HIGH_RES_RATE_HUNDREDTH_CENTS_PER_SEC
+    } else {
+      LOW_RES_RATE_HUNDREDTH_CENTS_PER_SEC
+    };
+    let extra_images = self.reference_image_count.saturating_sub(INCLUDED_REFERENCE_IMAGES);
+    // Round up to the next whole cent.
+    let cost_in_usd_cents =
+      (rate * self.duration_seconds + extra_images * EXTRA_REFERENCE_IMAGE_HUNDREDTH_CENTS)
+        .div_ceil(100);
+
+    VideoGenerationCostEstimate {
+      cost_in_credits: Some(cost_in_usd_cents),
+      cost_in_usd_cents: Some(cost_in_usd_cents),
+      is_free: false,
+      is_unlimited: false,
+      is_rate_limited: false,
+      has_watermark: false,
+      failures_are_refunded: None,
+    }
+  }
+}
+
+/// MiniMax H3 offers 768P and 2K output; 1080p and above land on the 2K tier,
+/// while 720p and below render at 768P. The default (unset) resolution is 2K.
+fn is_2k(resolution: Option<CommonResolutionEnum>) -> bool {
+  match resolution {
+    None => true, // defaults to 2K
+    Some(CommonResolutionEnum::TenEightyP)
+    | Some(CommonResolutionEnum::OneK)
+    | Some(CommonResolutionEnum::TwoK)
+    | Some(CommonResolutionEnum::ThreeK)
+    | Some(CommonResolutionEnum::FourK) => true,
+    Some(CommonResolutionEnum::HalfK)
+    | Some(CommonResolutionEnum::FourEightyP)
+    | Some(CommonResolutionEnum::SevenTwentyP) => false,
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use enums::common::generation::common_resolution::CommonResolution as CommonResolutionEnum;
+  use tokens::tokens::media_files::MediaFileToken;
+
+  use crate::api::image_list_ref::ImageListRef;
+  use crate::api::router_provider::RouterProvider;
+  use crate::api::router_resolution::RouterResolution;
+  use crate::api::router_video_model::RouterVideoModel;
+  use crate::generate::generate_video::generate_video_request_builder::GenerateVideoRequestBuilder;
+  use crate::generate::generate_video::providers::artcraft::minimax_h3::build::build_artcraft_minimax_h3_state;
+  use crate::generate::generate_video::providers::artcraft::minimax_h3::cost::ArtcraftMinimaxH3CostState;
+
+  #[test]
+  fn default_resolution_5s_is_150() { assert_eq!(cost_cents(Some(5), None, 0), 150); }
+
+  #[test]
+  fn default_duration_is_5s() { assert_eq!(cost_cents(None, None, 0), 150); }
+
+  #[test]
+  fn low_res_5s_is_92() { assert_eq!(cost_cents(Some(5), Some(RouterResolution::SevenTwentyP), 0), 92); }
+
+  #[test]
+  fn four_eighty_p_lands_on_low_tier() {
+    assert_eq!(cost_cents(Some(5), Some(RouterResolution::FourEightyP), 0), 92);
+  }
+
+  #[test]
+  fn low_res_15s_is_276() { assert_eq!(cost_cents(Some(15), Some(RouterResolution::SevenTwentyP), 0), 276); }
+
+  #[test]
+  fn high_res_10s_is_299() { assert_eq!(cost_cents(Some(10), Some(RouterResolution::TenEightyP), 0), 299); }
+
+  #[test]
+  fn odd_duration_rounds_up_to_whole_cents() {
+    // 7s high res: 2990 × 7 = 20930 hundredth-cents → 210 cents.
+    assert_eq!(cost_cents(Some(7), None, 0), 210);
+  }
+
+  #[test]
+  fn five_reference_images_are_included() {
+    assert_eq!(cost_cents(Some(5), None, 5), cost_cents(Some(5), None, 0));
+  }
+
+  #[test]
+  fn nine_reference_images_add_the_extra_image_fee() {
+    // 2990 × 5 + 4 × 920 = 18630 hundredth-cents → 187 cents.
+    assert_eq!(cost_cents(Some(5), None, 9), 187);
+  }
+
+  #[test]
+  fn resolution_classifier_defaults_2k() {
+    assert!(super::is_2k(None));
+    assert!(super::is_2k(Some(CommonResolutionEnum::TenEightyP)));
+    assert!(!super::is_2k(Some(CommonResolutionEnum::SevenTwentyP)));
+    assert!(!super::is_2k(Some(CommonResolutionEnum::FourEightyP)));
+  }
+
+  fn cost_cents(
+    duration_seconds: Option<u16>,
+    resolution: Option<RouterResolution>,
+    reference_image_count: usize,
+  ) -> u64 {
+    let reference_images = if reference_image_count == 0 {
+      None
+    } else {
+      Some(ImageListRef::MediaFileTokens(
+        (0..reference_image_count)
+          .map(|i| MediaFileToken::new(format!("m_test_{i}")))
+          .collect(),
+      ))
+    };
+    let b = GenerateVideoRequestBuilder {
+      model: RouterVideoModel::MinimaxH3,
+      provider: RouterProvider::Artcraft,
+      prompt: Some("test".to_string()),
+      duration_seconds,
+      resolution,
+      reference_images,
+      ..Default::default()
+    };
+    let state = build_artcraft_minimax_h3_state(b).unwrap();
+    ArtcraftMinimaxH3CostState::from_request(&state).estimate_cost().cost_in_usd_cents.unwrap()
+  }
+}

crates/api_clients/artcraft/artcraft_router/src/generate/generate_video/providers/artcraft/minimax_h3/mod.rs

@@ -0,0 +1,3 @@
+pub mod build;
+pub mod cost;
+pub mod request;

crates/api_clients/artcraft/artcraft_router/src/generate/generate_video/providers/artcraft/minimax_h3/request.rs

@@ -0,0 +1,117 @@
+use artcraft_api_defs::omni_gen::cost_and_generate_requests::omni_gen_video_cost_and_generate_request::OmniGenVideoCostAndGenerateRequest;
+
+use crate::client::router_artcraft_client::RouterArtcraftClient;
+use crate::errors::artcraft_router_error::ArtcraftRouterError;
+use crate::generate::generate_video::generate_video_response::GenerateVideoResponse;
+use crate::generate::generate_video::providers::artcraft::request_common::send_artcraft_omni_video_request;
+
+#[derive(Clone, Debug)]
+pub struct ArtcraftMinimaxH3RequestState {
+  pub request: OmniGenVideoCostAndGenerateRequest,
+}
+
+impl ArtcraftMinimaxH3RequestState {
+  pub async fn send(&self, client: &RouterArtcraftClient) -> Result<GenerateVideoResponse, ArtcraftRouterError> {
+    send_artcraft_omni_video_request(&self.request, client).await
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use tokens::tokens::media_files::MediaFileToken;
+
+  use artcraft_client::credentials::storyteller_credential_set::StorytellerCredentialSet;
+  use artcraft_client::utils::api_host::ApiHost;
+  use test_data::web::image_media_tokens::JUNO_AT_LAKE_PRODUCTION_MEDIA_TOKEN;
+
+  use crate::api::image_list_ref::ImageListRef;
+  use crate::api::image_ref::ImageRef;
+  use crate::api::router_aspect_ratio::RouterAspectRatio;
+  use crate::api::router_provider::RouterProvider;
+  use crate::api::router_video_model::RouterVideoModel;
+  use crate::client::router_artcraft_client::RouterArtcraftClient;
+  use crate::client::router_client::RouterClient;
+  use crate::generate::generate_video::generate_video_request_builder::GenerateVideoRequestBuilder;
+  use crate::generate::generate_video::generate_video_response::GenerateVideoResponse;
+  use crate::generate::generate_video::video_generation_draft_or_request::VideoGenerationDraftOrRequest;
+
+  #[tokio::test]
+  #[ignore] // sends a real generation to the Artcraft backend, incurs cost
+  async fn text_to_video() {
+    let response = run_pipeline(GenerateVideoRequestBuilder {
+      prompt: Some("A red kite soaring over coastal cliffs, cinematic.".to_string()),
+      aspect_ratio: Some(RouterAspectRatio::WideSixteenByNine),
+      ..artcraft_builder()
+    }).await;
+    assert!(matches!(response, GenerateVideoResponse::Artcraft(_)));
+    assert_eq!(1, 2, "Inspect output above");
+  }
+
+  #[tokio::test]
+  #[ignore] // sends a real generation to the Artcraft backend, incurs cost
+  async fn keyframe_start_frame() {
+    let response = run_pipeline(GenerateVideoRequestBuilder {
+      prompt: Some("The dog stands up and walks toward the lake.".to_string()),
+      start_frame: Some(ImageRef::MediaFileToken(MediaFileToken::new(JUNO_AT_LAKE_PRODUCTION_MEDIA_TOKEN.to_string()))),
+      ..artcraft_builder()
+    }).await;
+    assert!(matches!(response, GenerateVideoResponse::Artcraft(_)));
+    assert_eq!(1, 2, "Inspect output above");
+  }
+
+  #[tokio::test]
+  #[ignore] // sends a real generation to the Artcraft backend, incurs cost
+  async fn reference_images_to_video() {
+    let response = run_pipeline(GenerateVideoRequestBuilder {
+      prompt: Some("Image 1 is the dog. The dog explores a mossy forest clearing.".to_string()),
+      reference_images: Some(ImageListRef::MediaFileTokens(vec![MediaFileToken::new(JUNO_AT_LAKE_PRODUCTION_MEDIA_TOKEN.to_string())])),
+      ..artcraft_builder()
+    }).await;
+    assert!(matches!(response, GenerateVideoResponse::Artcraft(_)));
+    assert_eq!(1, 2, "Inspect output above");
+  }
+
+  // ── Helpers ──
+
+  fn artcraft_builder() -> GenerateVideoRequestBuilder {
+    GenerateVideoRequestBuilder {
+      model: RouterVideoModel::MinimaxH3,
+      provider: RouterProvider::Artcraft,
+      duration_seconds: Some(5),
+      video_batch_count: Some(1),
+      ..Default::default()
+    }
+  }
+
+  fn get_artcraft_client() -> RouterClient {
+    let cookies = std::fs::read_to_string("/Users/bt/Artcraft/credentials/artcraft_cookies.txt")
+      .expect("Failed to read artcraft cookies");
+    let cookies = cookies.trim().to_string();
+    let credentials = StorytellerCredentialSet::parse_multi_cookie_header(&cookies)
+      .expect("Failed to parse cookies")
+      .expect("No credentials found");
+    RouterClient::Artcraft(RouterArtcraftClient::new(ApiHost::Storyteller, credentials))
+  }
+
+  async fn run_pipeline(builder: GenerateVideoRequestBuilder) -> GenerateVideoResponse {
+    let client = get_artcraft_client();
+
+    let draft_or_request = builder.build2().expect("build2 should succeed");
+    let request = match draft_or_request {
+      VideoGenerationDraftOrRequest::Request(r) => r,
+      _ => panic!("expected Request variant (Artcraft skips draft)"),
+    };
+
+    let response = request.send_request(&client).await.expect("send_request should succeed");
+
+    match &response {
+      GenerateVideoResponse::Artcraft(p) => {
+        println!("inference_job_token={:?}", p.inference_job_token);
+        println!("all_inference_job_tokens={:?}", p.all_inference_job_tokens);
+      }
+      other => println!("response: {:?}", other),
+    }
+
+    response
+  }
+}

crates/api_clients/artcraft/artcraft_router/src/generate/generate_video/providers/artcraft/mod.rs

@@ -4,6 +4,8 @@ pub(crate) mod seedance_common;
 mod parity_tests;
 pub mod grok_imagine_video;
 pub mod grok_imagine_video_1p5;
+pub mod flux_3;
+pub mod flux_3_draft;
 pub mod happy_horse_1p0;
 pub mod kling_1_6_pro;
 pub mod kling_2_1_master;
@@ -12,6 +14,7 @@ pub mod kling_2_5_turbo_pro;
 pub mod kling_2_6_pro;
 pub mod kling_3p0_pro;
 pub mod kling_3p0_standard;
+pub mod minimax_h3;
 pub mod preview_model;
 pub mod preview_model_fast;
 pub(crate) mod request_common;

crates/api_clients/artcraft/artcraft_router/src/generate/generate_video/providers/fal/flux_3/build.rs

@@ -0,0 +1,416 @@
+use fal_client::requests::api::video::image::flux_3::api::Flux3ImageToVideoRequest;
+use fal_client::requests::api::video::images::flux_3::api::Flux3FirstLastFrameToVideoRequest;
+use fal_client::requests::api::video::text::flux_3::api::{
+  Flux3AspectRatio, Flux3Duration, Flux3Resolution, Flux3TextToVideoRequest,
+};
+
+use crate::api::audio_list_ref::AudioListRef;
+use crate::api::image_list_ref::ImageListRef;
+use crate::api::image_ref::ImageRef;
+use crate::api::router_aspect_ratio::RouterAspectRatio;
+use crate::api::router_resolution::RouterResolution;
+use crate::api::video_list_ref::VideoListRef;
+use crate::client::request_mismatch_mitigation_strategy::RequestMismatchMitigationStrategy;
+use crate::errors::artcraft_router_error::ArtcraftRouterError;
+use crate::errors::client_error::ClientError;
+use crate::generate::generate_video::generate_video_request_builder::GenerateVideoRequestBuilder;
+use crate::generate::generate_video::providers::fal::flux_3::request::{
+  FalFlux3Mode, FalFlux3RequestState,
+};
+use crate::generate::generate_video::video_generation_draft_or_request::VideoGenerationDraftOrRequest;
+use crate::generate::generate_video::video_generation_request::VideoGenerationRequest;
+
+pub(crate) const MIN_DURATION_SECONDS: u16 = 5;
+pub(crate) const MAX_DURATION_SECONDS: u16 = 20;
+
+#[derive(Debug, Clone, Copy)]
+pub(crate) enum PlanAspectRatio {
+  Auto,
+  TwentyOneByNine,
+  SixteenByNine,
+  FourByThree,
+  Square,
+  ThreeByFour,
+  NineBySixteen,
+}
+
+pub fn build_fal_flux_3(
+  builder: GenerateVideoRequestBuilder,
+) -> Result<VideoGenerationDraftOrRequest, ArtcraftRouterError> {
+  let state = build_fal_flux_3_state(builder)?;
+  Ok(VideoGenerationDraftOrRequest::Request(VideoGenerationRequest::FalFlux3(state)))
+}
+
+pub(crate) fn build_fal_flux_3_state(
+  builder: GenerateVideoRequestBuilder,
+) -> Result<FalFlux3RequestState, ArtcraftRouterError> {
+  let strategy = builder.request_mismatch_mitigation_strategy;
+
+  // Flux 3 exposes no reference modality here — only text, starting keyframe,
+  // and start/end keyframes.
+  reject_references(&builder)?;
+
+  let start = optional_url(builder.start_frame.clone())?;
+  let end = optional_url(builder.end_frame.clone())?;
+
+  let aspect_ratio = plan_aspect_ratio(builder.aspect_ratio, strategy)?;
+  let resolution = plan_resolution(builder.resolution, strategy)?;
+  let flexible_duration = plan_flexible_duration(builder.duration_seconds, strategy)?;
+  let fixed_duration = plan_fixed_duration(builder.duration_seconds, strategy)?;
+  let prompt = builder.prompt.clone().unwrap_or_default();
+  let generate_audio = builder.generate_audio;
+
+  // Modality dispatch:
+  //   start + end frames → first-last-frame-to-video
+  //   start frame only   → image-to-video
+  //   no media           → text-to-video
+  let mode = match (start, end) {
+    (None, None) => FalFlux3Mode::TextToVideo(Flux3TextToVideoRequest {
+      prompt,
+      duration: flexible_duration,
+      resolution,
+      aspect_ratio: aspect_ratio.map(to_flux_3_aspect_ratio),
+      generate_audio,
+      safety_tolerance: Some(4), // NB: 4 is the most permissive.
+    }),
+    (Some(image_url), None) => FalFlux3Mode::ImageToVideo(Flux3ImageToVideoRequest {
+      prompt,
+      image_url,
+      duration: flexible_duration,
+      resolution,
+      aspect_ratio: aspect_ratio.map(to_flux_3_aspect_ratio),
+      generate_audio,
+      safety_tolerance: Some(4), // NB: 4 is the most permissive.
+    }),
+    (Some(start_image_url), Some(end_image_url)) => FalFlux3Mode::FirstLastFrameToVideo(
+      Flux3FirstLastFrameToVideoRequest {
+        prompt,
+        start_image_url,
+        end_image_url,
+        duration: fixed_duration,
+        resolution,
+        aspect_ratio: aspect_ratio.map(to_flux_3_aspect_ratio),
+        generate_audio,
+        safety_tolerance: Some(4), // NB: 4 is the most permissive.
+      },
+    ),
+    (None, Some(_)) => {
+      return Err(unsupported(
+        "end_frame",
+        "Flux 3 requires a start_frame when end_frame is provided",
+      ));
+    }
+  };
+
+  Ok(FalFlux3RequestState { mode })
+}
+
+// ── Input helpers (shared with the draft variant) ──
+
+pub(crate) fn unsupported(field: &'static str, value: &str) -> ArtcraftRouterError {
+  ArtcraftRouterError::Client(ClientError::ModelDoesNotSupportOption {
+    field,
+    value: value.to_string(),
+  })
+}
+
+/// Flux 3 supports no reference inputs — no image, video, or audio references.
+pub(crate) fn reject_references(builder: &GenerateVideoRequestBuilder) -> Result<(), ArtcraftRouterError> {
+  let has_reference_images = match &builder.reference_images {
+    None => false,
+    Some(ImageListRef::Urls(urls)) => !urls.is_empty(),
+    Some(ImageListRef::MediaFileTokens(tokens)) => !tokens.is_empty(),
+  };
+  if has_reference_images {
+    return Err(unsupported("reference_images", "Flux 3 does not support image references"));
+  }
+
+  let has_reference_videos = match &builder.reference_videos {
+    None => false,
+    Some(VideoListRef::Urls(urls)) => !urls.is_empty(),
+    Some(VideoListRef::MediaFileTokens(tokens)) => !tokens.is_empty(),
+  };
+  if has_reference_videos {
+    return Err(unsupported("reference_videos", "Flux 3 does not support video references"));
+  }
+
+  let has_reference_audio = match &builder.reference_audio {
+    None => false,
+    Some(AudioListRef::Urls(urls)) => !urls.is_empty(),
+    Some(AudioListRef::MediaFileTokens(tokens)) => !tokens.is_empty(),
+  };
+  if has_reference_audio {
+    return Err(unsupported("reference_audio", "Flux 3 does not support audio references"));
+  }
+
+  Ok(())
+}
+
+pub(crate) fn optional_url(image_ref: Option<ImageRef>) -> Result<Option<String>, ArtcraftRouterError> {
+  match image_ref {
+    None => Ok(None),
+    Some(ImageRef::Url(url)) => Ok(Some(url)),
+    Some(ImageRef::MediaFileToken(_)) => {
+      Err(ArtcraftRouterError::Client(ClientError::FalOnlySupportsUrls))
+    }
+  }
+}
+
+// ── Plan helpers (shared with the draft variant) ──
+
+pub(crate) fn plan_aspect_ratio(
+  aspect_ratio: Option<RouterAspectRatio>,
+  strategy: RequestMismatchMitigationStrategy,
+) -> Result<Option<PlanAspectRatio>, ArtcraftRouterError> {
+  use PlanAspectRatio as Ar;
+  match aspect_ratio {
+    None => Ok(None),
+
+    Some(RouterAspectRatio::Auto)
+    | Some(RouterAspectRatio::Auto2k)
+    | Some(RouterAspectRatio::Auto3k)
+    | Some(RouterAspectRatio::Auto4k) => Ok(Some(Ar::Auto)),
+
+    Some(RouterAspectRatio::WideTwentyOneByNine) => Ok(Some(Ar::TwentyOneByNine)),
+    Some(RouterAspectRatio::WideSixteenByNine) | Some(RouterAspectRatio::Wide) => Ok(Some(Ar::SixteenByNine)),
+    Some(RouterAspectRatio::TallNineBySixteen) | Some(RouterAspectRatio::Tall) => Ok(Some(Ar::NineBySixteen)),
+    Some(RouterAspectRatio::WideFourByThree) => Ok(Some(Ar::FourByThree)),
+    Some(RouterAspectRatio::TallThreeByFour) => Ok(Some(Ar::ThreeByFour)),
+    Some(RouterAspectRatio::Square) | Some(RouterAspectRatio::SquareHd) => Ok(Some(Ar::Square)),
+
+    Some(other) => match strategy {
+      RequestMismatchMitigationStrategy::ErrorOut => {
+        Err(unsupported("aspect_ratio", &format!("{:?}", other)))
+      }
+      _ => Ok(Some(Ar::Auto)),
+    },
+  }
+}
+
+/// Flux 3 renders 720p or 1080p; 480p rounds up to 720p (same billing tier).
+pub(crate) fn plan_resolution(
+  resolution: Option<RouterResolution>,
+  strategy: RequestMismatchMitigationStrategy,
+) -> Result<Option<Flux3Resolution>, ArtcraftRouterError> {
+  match resolution {
+    None => Ok(None),
+
+    Some(RouterResolution::FourEightyP)
+    | Some(RouterResolution::SevenTwentyP) => Ok(Some(Flux3Resolution::SevenTwentyP)),
+    Some(RouterResolution::TenEightyP) => Ok(Some(Flux3Resolution::TenEightyP)),
+
+    Some(other) => match strategy {
+      RequestMismatchMitigationStrategy::ErrorOut => {
+        Err(unsupported("resolution", &format!("{:?}", other)))
+      }
+      RequestMismatchMitigationStrategy::PayMoreUpgrade => Ok(Some(Flux3Resolution::TenEightyP)),
+      RequestMismatchMitigationStrategy::PayLessDowngrade => Ok(Some(Flux3Resolution::SevenTwentyP)),
+    },
+  }
+}
+
+/// Duration for the modalities that accept `auto` (text, image). `None` stays
+/// unset so fal's `auto` default applies.
+pub(crate) fn plan_flexible_duration(
+  duration_seconds: Option<u16>,
+  strategy: RequestMismatchMitigationStrategy,
+) -> Result<Option<Flux3Duration>, ArtcraftRouterError> {
+  Ok(plan_fixed_duration(duration_seconds, strategy)?.map(Flux3Duration::Seconds))
+}
+
+/// Duration for the fixed-duration first-last-frame modality. `None` stays
+/// unset so fal's 5-second default applies.
+pub(crate) fn plan_fixed_duration(
+  duration_seconds: Option<u16>,
+  strategy: RequestMismatchMitigationStrategy,
+) -> Result<Option<u8>, ArtcraftRouterError> {
+  match duration_seconds {
+    None => Ok(None),
+    Some(seconds) if (MIN_DURATION_SECONDS..=MAX_DURATION_SECONDS).contains(&seconds) => {
+      Ok(Some(seconds as u8))
+    }
+    Some(other) => match strategy {
+      RequestMismatchMitigationStrategy::ErrorOut => {
+        Err(unsupported("duration_seconds", &format!("{}", other)))
+      }
+      RequestMismatchMitigationStrategy::PayMoreUpgrade
+      | RequestMismatchMitigationStrategy::PayLessDowngrade => {
+        Ok(Some(other.clamp(MIN_DURATION_SECONDS, MAX_DURATION_SECONDS) as u8))
+      }
+    },
+  }
+}
+
+// ── Leaf converters ──
+
+pub(crate) fn to_flux_3_aspect_ratio(a: PlanAspectRatio) -> Flux3AspectRatio {
+  match a {
+    PlanAspectRatio::Auto => Flux3AspectRatio::Auto,
+    PlanAspectRatio::TwentyOneByNine => Flux3AspectRatio::TwentyOneByNine,
+    PlanAspectRatio::SixteenByNine => Flux3AspectRatio::SixteenByNine,
+    PlanAspectRatio::FourByThree => Flux3AspectRatio::FourByThree,
+    PlanAspectRatio::Square => Flux3AspectRatio::Square,
+    PlanAspectRatio::ThreeByFour => Flux3AspectRatio::ThreeByFour,
+    PlanAspectRatio::NineBySixteen => Flux3AspectRatio::NineBySixteen,
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use crate::api::router_provider::RouterProvider;
+  use crate::api::router_video_model::RouterVideoModel;
+
+  use super::*;
+
+  const START_URL: &str = "https://example.com/start.png";
+  const END_URL: &str = "https://example.com/end.png";
+
+  mod dispatch_tests {
+    use super::*;
+
+    #[test]
+    fn no_inputs_picks_t2v() {
+      let state = build_fal_flux_3_state(base_builder()).expect("build");
+      assert!(matches!(state.mode, FalFlux3Mode::TextToVideo(_)));
+    }
+
+    #[test]
+    fn start_frame_picks_i2v() {
+      let mut b = base_builder();
+      b.start_frame = Some(ImageRef::Url(START_URL.to_string()));
+      let state = build_fal_flux_3_state(b).expect("build");
+      assert!(matches!(state.mode, FalFlux3Mode::ImageToVideo(_)));
+    }
+
+    #[test]
+    fn start_and_end_frames_pick_first_last_frame() {
+      let mut b = base_builder();
+      b.start_frame = Some(ImageRef::Url(START_URL.to_string()));
+      b.end_frame = Some(ImageRef::Url(END_URL.to_string()));
+      let state = build_fal_flux_3_state(b).expect("build");
+      let FalFlux3Mode::FirstLastFrameToVideo(req) = state.mode else {
+        panic!("expected FirstLastFrameToVideo");
+      };
+      assert_eq!(req.start_image_url, START_URL);
+      assert_eq!(req.end_image_url, END_URL);
+    }
+
+    #[test]
+    fn end_frame_without_start_frame_errors() {
+      let mut b = base_builder();
+      b.end_frame = Some(ImageRef::Url(END_URL.to_string()));
+      assert!(build_fal_flux_3_state(b).is_err());
+    }
+
+    #[test]
+    fn reference_images_error() {
+      let mut b = base_builder();
+      b.reference_images = Some(ImageListRef::Urls(vec!["https://example.com/ref.png".to_string()]));
+      assert!(build_fal_flux_3_state(b).is_err());
+    }
+
+    #[test]
+    fn reference_videos_error() {
+      let mut b = base_builder();
+      b.reference_videos = Some(VideoListRef::Urls(vec!["https://example.com/v.mp4".to_string()]));
+      assert!(build_fal_flux_3_state(b).is_err());
+    }
+
+    #[test]
+    fn reference_audio_errors() {
+      let mut b = base_builder();
+      b.reference_audio = Some(AudioListRef::Urls(vec!["https://example.com/a.mp3".to_string()]));
+      assert!(build_fal_flux_3_state(b).is_err());
+    }
+
+    #[test]
+    fn empty_reference_lists_are_ignored() {
+      let mut b = base_builder();
+      b.reference_images = Some(ImageListRef::Urls(vec![]));
+      b.reference_videos = Some(VideoListRef::Urls(vec![]));
+      b.reference_audio = Some(AudioListRef::Urls(vec![]));
+      let state = build_fal_flux_3_state(b).expect("build");
+      assert!(matches!(state.mode, FalFlux3Mode::TextToVideo(_)));
+    }
+  }
+
+  mod plan_tests {
+    use super::*;
+
+    #[test]
+    fn duration_25_errors_under_error_out() {
+      let mut b = base_builder();
+      b.duration_seconds = Some(25);
+      b.request_mismatch_mitigation_strategy = RequestMismatchMitigationStrategy::ErrorOut;
+      assert!(build_fal_flux_3_state(b).is_err());
+    }
+
+    #[test]
+    fn duration_25_clamps_to_20_under_pay_less() {
+      let mut b = base_builder();
+      b.duration_seconds = Some(25);
+      b.request_mismatch_mitigation_strategy = RequestMismatchMitigationStrategy::PayLessDowngrade;
+      let state = build_fal_flux_3_state(b).expect("build");
+      let FalFlux3Mode::TextToVideo(req) = state.mode else {
+        panic!("expected TextToVideo");
+      };
+      assert_eq!(req.duration, Some(Flux3Duration::Seconds(20)));
+    }
+
+    #[test]
+    fn resolution_480p_and_720p_map_to_720p() {
+      for res in [RouterResolution::FourEightyP, RouterResolution::SevenTwentyP] {
+        let mut b = base_builder();
+        b.resolution = Some(res);
+        let state = build_fal_flux_3_state(b).expect("build");
+        let FalFlux3Mode::TextToVideo(req) = state.mode else {
+          panic!("expected TextToVideo");
+        };
+        assert_eq!(req.resolution, Some(Flux3Resolution::SevenTwentyP), "res={res:?}");
+      }
+    }
+
+    #[test]
+    fn auto_aspect_ratio_maps_to_flux_auto() {
+      let mut b = base_builder();
+      b.aspect_ratio = Some(RouterAspectRatio::Auto);
+      let state = build_fal_flux_3_state(b).expect("build");
+      let FalFlux3Mode::TextToVideo(req) = state.mode else {
+        panic!("expected TextToVideo");
+      };
+      assert_eq!(req.aspect_ratio, Some(Flux3AspectRatio::Auto));
+    }
+
+    #[test]
+    fn twenty_one_by_nine_is_supported() {
+      let mut b = base_builder();
+      b.aspect_ratio = Some(RouterAspectRatio::WideTwentyOneByNine);
+      b.request_mismatch_mitigation_strategy = RequestMismatchMitigationStrategy::ErrorOut;
+      let state = build_fal_flux_3_state(b).expect("build");
+      let FalFlux3Mode::TextToVideo(req) = state.mode else {
+        panic!("expected TextToVideo");
+      };
+      assert_eq!(req.aspect_ratio, Some(Flux3AspectRatio::TwentyOneByNine));
+    }
+
+    #[test]
+    fn generate_audio_propagates() {
+      let mut b = base_builder();
+      b.generate_audio = Some(false);
+      let state = build_fal_flux_3_state(b).expect("build");
+      let FalFlux3Mode::TextToVideo(req) = state.mode else {
+        panic!("expected TextToVideo");
+      };
+      assert_eq!(req.generate_audio, Some(false));
+    }
+  }
+
+  fn base_builder() -> GenerateVideoRequestBuilder {
+    GenerateVideoRequestBuilder {
+      model: RouterVideoModel::Flux3,
+      provider: RouterProvider::Fal,
+      prompt: Some("test".to_string()),
+      ..Default::default()
+    }
+  }
+}

crates/api_clients/artcraft/artcraft_router/src/generate/generate_video/providers/fal/flux_3/cost.rs

@@ -0,0 +1,106 @@
+use fal_client::requests::traits::fal_request_cost_calculator_trait::FalRequestCostCalculator;
+
+use crate::generate::generate_video::providers::fal::flux_3::request::{
+  FalFlux3Mode, FalFlux3RequestState,
+};
+use crate::generate::generate_video::video_generation_cost_estimate::VideoGenerationCostEstimate;
+
+#[derive(Clone, Debug)]
+pub struct FalFlux3CostState {
+  pub cost_in_usd_cents: u64,
+}
+
+impl FalFlux3CostState {
+  pub fn from_request(request: &FalFlux3RequestState) -> Self {
+    // Cost math is owned by fal_client's per-endpoint
+    // `FalRequestCostCalculator` implementations. The router state just
+    // forwards the result so router cost ≡ fal_client cost by construction.
+    let cost_in_usd_cents = match &request.mode {
+      FalFlux3Mode::TextToVideo(req) => req.calculate_cost_in_cents(),
+      FalFlux3Mode::ImageToVideo(req) => req.calculate_cost_in_cents(),
+      FalFlux3Mode::FirstLastFrameToVideo(req) => req.calculate_cost_in_cents(),
+    };
+    Self { cost_in_usd_cents }
+  }
+
+  pub fn estimate_cost(&self) -> VideoGenerationCostEstimate {
+    VideoGenerationCostEstimate {
+      cost_in_credits: Some(self.cost_in_usd_cents),
+      cost_in_usd_cents: Some(self.cost_in_usd_cents),
+      is_free: false,
+      is_unlimited: false,
+      is_rate_limited: false,
+      has_watermark: false,
+      failures_are_refunded: None,
+    }
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use crate::api::image_ref::ImageRef;
+  use crate::api::router_provider::RouterProvider;
+  use crate::api::router_resolution::RouterResolution;
+  use crate::api::router_video_model::RouterVideoModel;
+  use crate::generate::generate_video::generate_video_request_builder::GenerateVideoRequestBuilder;
+  use crate::generate::generate_video::providers::fal::flux_3::build::build_fal_flux_3_state;
+
+  use super::*;
+
+  // Pricing (from fal_client's flux_3 cost modules):
+  //   720p: $0.17/s, 1080p: $0.29/s (all modalities)
+  // fal defaults when unset: duration = 5s (auto estimates at the 5s floor),
+  // resolution = 720p.
+
+  #[test]
+  fn t2v_default_settings_is_85() {
+    assert_eq!(cost_cents(base_builder(None, None)), 85);
+  }
+
+  #[test]
+  fn t2v_10s_1080p_is_290() {
+    assert_eq!(cost_cents(base_builder(Some(10), Some(RouterResolution::TenEightyP))), 290);
+  }
+
+  #[test]
+  fn i2v_5s_720p_is_85() {
+    let mut b = base_builder(Some(5), Some(RouterResolution::SevenTwentyP));
+    b.start_frame = Some(ImageRef::Url("https://example.com/start.png".to_string()));
+    assert_eq!(cost_cents(b), 85);
+  }
+
+  #[test]
+  fn first_last_frame_20s_1080p_is_580() {
+    let mut b = base_builder(Some(20), Some(RouterResolution::TenEightyP));
+    b.start_frame = Some(ImageRef::Url("https://example.com/start.png".to_string()));
+    b.end_frame = Some(ImageRef::Url("https://example.com/end.png".to_string()));
+    assert_eq!(cost_cents(b), 580);
+  }
+
+  #[test]
+  fn estimate_cost_forwards_cents() {
+    let estimate = FalFlux3CostState { cost_in_usd_cents: 85 }.estimate_cost();
+    assert_eq!(estimate.cost_in_usd_cents, Some(85));
+    assert_eq!(estimate.cost_in_credits, Some(85));
+    assert!(!estimate.is_free);
+  }
+
+  fn base_builder(
+    duration_seconds: Option<u16>,
+    resolution: Option<RouterResolution>,
+  ) -> GenerateVideoRequestBuilder {
+    GenerateVideoRequestBuilder {
+      model: RouterVideoModel::Flux3,
+      provider: RouterProvider::Fal,
+      prompt: Some("test".to_string()),
+      duration_seconds,
+      resolution,
+      ..Default::default()
+    }
+  }
+
+  fn cost_cents(builder: GenerateVideoRequestBuilder) -> u64 {
+    let state = build_fal_flux_3_state(builder).expect("build");
+    FalFlux3CostState::from_request(&state).cost_in_usd_cents
+  }
+}

crates/api_clients/artcraft/artcraft_router/src/generate/generate_video/providers/fal/flux_3/mod.rs

@@ -0,0 +1,3 @@
+pub mod build;
+pub mod cost;
+pub mod request;

crates/api_clients/artcraft/artcraft_router/src/generate/generate_video/providers/fal/flux_3/request.rs

@@ -0,0 +1,144 @@
+use std::fmt::Debug;
+use std::sync::Arc;
+
+use fal_client::requests::api::video::image::flux_3::api::Flux3ImageToVideoRequest;
+use fal_client::requests::api::video::images::flux_3::api::Flux3FirstLastFrameToVideoRequest;
+use fal_client::requests::api::video::text::flux_3::api::Flux3TextToVideoRequest;
+use fal_client::requests::traits::fal_endpoint_trait::FalEndpoint;
+
+use crate::client::router_fal_client::RouterFalClient;
+use crate::errors::artcraft_router_error::ArtcraftRouterError;
+use crate::generate::generate_video::generate_video_response::{
+  FalVideoResponsePayload, GenerateVideoResponse,
+};
+
+#[derive(Clone, Debug)]
+pub enum FalFlux3Mode {
+  TextToVideo(Flux3TextToVideoRequest),
+  ImageToVideo(Flux3ImageToVideoRequest),
+  FirstLastFrameToVideo(Flux3FirstLastFrameToVideoRequest),
+}
+
+#[derive(Clone, Debug)]
+pub struct FalFlux3RequestState {
+  pub mode: FalFlux3Mode,
+}
+
+impl FalFlux3RequestState {
+  pub async fn send(&self, client: &RouterFalClient) -> Result<GenerateVideoResponse, ArtcraftRouterError> {
+    match &self.mode {
+      FalFlux3Mode::TextToVideo(request) => send_request(request, client).await,
+      FalFlux3Mode::ImageToVideo(request) => send_request(request, client).await,
+      FalFlux3Mode::FirstLastFrameToVideo(request) => send_request(request, client).await,
+    }
+  }
+}
+
+// ── Helpers ──
+
+async fn send_request<T>(request: &T, client: &RouterFalClient) -> Result<GenerateVideoResponse, ArtcraftRouterError>
+where
+  T: FalEndpoint + Clone + Debug + Send + Sync + 'static,
+{
+  let outbound: Arc<dyn Debug + Send + Sync> = Arc::new(request.clone());
+  let payload = send_fal_request(request, client).await?;
+  Ok(GenerateVideoResponse::Fal(FalVideoResponsePayload {
+    request_id: payload.request_id,
+    gateway_request_id: payload.gateway_request_id,
+    maybe_status_url: payload.status_url,
+    maybe_response_url: payload.response_url,
+    maybe_outbound_request: Some(outbound),
+  }))
+}
+
+struct FalResponseIds {
+  request_id: Option<String>,
+  gateway_request_id: Option<String>,
+  status_url: Option<String>,
+  response_url: Option<String>,
+}
+
+async fn send_fal_request<T: FalEndpoint>(
+  request: &T,
+  client: &RouterFalClient,
+) -> Result<FalResponseIds, ArtcraftRouterError> {
+  if let Some(webhook_url) = &client.webhook_url {
+    let response = request.send_webhook_request(&client.api_key, webhook_url).await?;
+    Ok(FalResponseIds {
+      request_id: response.request_id,
+      gateway_request_id: response.gateway_request_id,
+      status_url: None,
+      response_url: None,
+    })
+  } else {
+    let response = request.send_queue_request(&client.api_key).await?;
+    Ok(FalResponseIds {
+      request_id: Some(response.request_id),
+      gateway_request_id: None,
+      status_url: Some(response.status_url),
+      response_url: Some(response.response_url),
+    })
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+  use fal_client::creds::fal_api_key::FalApiKey;
+  use fal_client::requests::api::video::text::flux_3::api::{
+    Flux3AspectRatio, Flux3Duration, Flux3Resolution,
+  };
+  use test_data::web::image_urls::JUNO_AT_LAKE_IMAGE_URL;
+
+  #[tokio::test]
+  #[ignore] // requires real API key, incurs cost
+  async fn send_text_to_video_webhook() {
+    let state = FalFlux3RequestState {
+      mode: FalFlux3Mode::TextToVideo(Flux3TextToVideoRequest {
+        prompt: "a calm lake at sunrise".to_string(),
+        duration: Some(Flux3Duration::Seconds(5)),
+        resolution: Some(Flux3Resolution::SevenTwentyP),
+        aspect_ratio: Some(Flux3AspectRatio::SixteenByNine),
+        generate_audio: Some(false),
+        safety_tolerance: Some(4), // NB: 4 is the most permissive.
+      }),
+    };
+    let response = state.send(&client_with_webhook()).await.expect("send should succeed");
+    let payload = response.get_fal_payload().expect("expected Fal payload");
+    assert!(payload.request_id.is_some() || payload.gateway_request_id.is_some());
+  }
+
+  #[tokio::test]
+  #[ignore] // requires real API key, incurs cost
+  async fn send_image_to_video_webhook() {
+    let state = FalFlux3RequestState {
+      mode: FalFlux3Mode::ImageToVideo(Flux3ImageToVideoRequest {
+        prompt: "the lake comes alive".to_string(),
+        image_url: JUNO_AT_LAKE_IMAGE_URL.to_string(),
+        duration: Some(Flux3Duration::Seconds(5)),
+        resolution: Some(Flux3Resolution::SevenTwentyP),
+        aspect_ratio: None,
+        generate_audio: Some(false),
+        safety_tolerance: None,
+      }),
+    };
+    let response = state.send(&client_with_webhook()).await.expect("send should succeed");
+    let payload = response.get_fal_payload().expect("expected Fal payload");
+    assert!(payload.request_id.is_some() || payload.gateway_request_id.is_some());
+  }
+
+  // ── Helpers ──
+
+  fn read_fal_api_key() -> FalApiKey {
+    let secret = std::fs::read_to_string("/Users/bt/Artcraft/credentials/fal_api_key.txt")
+      .expect("Failed to read fal_api_key.txt");
+    FalApiKey::from_str(secret.trim())
+  }
+
+  fn client_with_webhook() -> RouterFalClient {
+    RouterFalClient::new_with_webhook(
+      read_fal_api_key(),
+      "https://example.com/fal-webhook-test".to_string(),
+    )
+  }
+}

crates/api_clients/artcraft/artcraft_router/src/generate/generate_video/providers/fal/flux_3_draft/build.rs

@@ -0,0 +1,151 @@
+use fal_client::requests::api::video::image::flux_3_draft::api::Flux3DraftImageToVideoRequest;
+use fal_client::requests::api::video::images::flux_3_draft::api::Flux3DraftFirstLastFrameToVideoRequest;
+use fal_client::requests::api::video::text::flux_3_draft::api::Flux3DraftTextToVideoRequest;
+
+use crate::errors::artcraft_router_error::ArtcraftRouterError;
+use crate::generate::generate_video::generate_video_request_builder::GenerateVideoRequestBuilder;
+use crate::generate::generate_video::providers::fal::flux_3::build::{
+  optional_url, plan_aspect_ratio, plan_fixed_duration, plan_flexible_duration,
+  reject_references, to_flux_3_aspect_ratio, unsupported,
+};
+use crate::generate::generate_video::providers::fal::flux_3_draft::request::{
+  FalFlux3DraftMode, FalFlux3DraftRequestState,
+};
+use crate::generate::generate_video::video_generation_draft_or_request::VideoGenerationDraftOrRequest;
+use crate::generate::generate_video::video_generation_request::VideoGenerationRequest;
+
+pub fn build_fal_flux_3_draft(
+  builder: GenerateVideoRequestBuilder,
+) -> Result<VideoGenerationDraftOrRequest, ArtcraftRouterError> {
+  let state = build_fal_flux_3_draft_state(builder)?;
+  Ok(VideoGenerationDraftOrRequest::Request(VideoGenerationRequest::FalFlux3Draft(state)))
+}
+
+/// Same modality dispatch as full-quality Flux 3 (see that build module) —
+/// text, starting keyframe, and start/end keyframes; no references — but
+/// against the draft endpoints, which always render 720p and take no
+/// resolution input, so any requested resolution is silently dropped.
+pub(crate) fn build_fal_flux_3_draft_state(
+  builder: GenerateVideoRequestBuilder,
+) -> Result<FalFlux3DraftRequestState, ArtcraftRouterError> {
+  let strategy = builder.request_mismatch_mitigation_strategy;
+
+  reject_references(&builder)?;
+
+  let start = optional_url(builder.start_frame.clone())?;
+  let end = optional_url(builder.end_frame.clone())?;
+
+  let aspect_ratio = plan_aspect_ratio(builder.aspect_ratio, strategy)?;
+  let flexible_duration = plan_flexible_duration(builder.duration_seconds, strategy)?;
+  let fixed_duration = plan_fixed_duration(builder.duration_seconds, strategy)?;
+  let prompt = builder.prompt.clone().unwrap_or_default();
+  let generate_audio = builder.generate_audio;
+
+  let mode = match (start, end) {
+    (None, None) => FalFlux3DraftMode::TextToVideo(Flux3DraftTextToVideoRequest {
+      prompt,
+      duration: flexible_duration,
+      aspect_ratio: aspect_ratio.map(to_flux_3_aspect_ratio),
+      generate_audio,
+      safety_tolerance: Some(4), // NB: 4 is the most permissive.
+    }),
+    (Some(image_url), None) => FalFlux3DraftMode::ImageToVideo(Flux3DraftImageToVideoRequest {
+      prompt,
+      image_url,
+      duration: flexible_duration,
+      aspect_ratio: aspect_ratio.map(to_flux_3_aspect_ratio),
+      generate_audio,
+      safety_tolerance: Some(4), // NB: 4 is the most permissive.
+    }),
+    (Some(start_image_url), Some(end_image_url)) => FalFlux3DraftMode::FirstLastFrameToVideo(
+      Flux3DraftFirstLastFrameToVideoRequest {
+        prompt,
+        start_image_url,
+        end_image_url,
+        duration: fixed_duration,
+        aspect_ratio: aspect_ratio.map(to_flux_3_aspect_ratio),
+        generate_audio,
+        safety_tolerance: Some(4), // NB: 4 is the most permissive.
+      },
+    ),
+    (None, Some(_)) => {
+      return Err(unsupported(
+        "end_frame",
+        "Flux 3 Draft requires a start_frame when end_frame is provided",
+      ));
+    }
+  };
+
+  Ok(FalFlux3DraftRequestState { mode })
+}
+
+#[cfg(test)]
+mod tests {
+  use crate::api::image_list_ref::ImageListRef;
+  use crate::api::image_ref::ImageRef;
+  use crate::api::router_provider::RouterProvider;
+  use crate::api::router_video_model::RouterVideoModel;
+  use crate::api::video_list_ref::VideoListRef;
+
+  use super::*;
+
+  const START_URL: &str = "https://example.com/start.png";
+  const END_URL: &str = "https://example.com/end.png";
+
+  mod dispatch_tests {
+    use super::*;
+
+    #[test]
+    fn no_inputs_picks_t2v() {
+      let state = build_fal_flux_3_draft_state(base_builder()).expect("build");
+      assert!(matches!(state.mode, FalFlux3DraftMode::TextToVideo(_)));
+    }
+
+    #[test]
+    fn start_frame_picks_i2v() {
+      let mut b = base_builder();
+      b.start_frame = Some(ImageRef::Url(START_URL.to_string()));
+      let state = build_fal_flux_3_draft_state(b).expect("build");
+      assert!(matches!(state.mode, FalFlux3DraftMode::ImageToVideo(_)));
+    }
+
+    #[test]
+    fn start_and_end_frames_pick_first_last_frame() {
+      let mut b = base_builder();
+      b.start_frame = Some(ImageRef::Url(START_URL.to_string()));
+      b.end_frame = Some(ImageRef::Url(END_URL.to_string()));
+      let state = build_fal_flux_3_draft_state(b).expect("build");
+      assert!(matches!(state.mode, FalFlux3DraftMode::FirstLastFrameToVideo(_)));
+    }
+
+    #[test]
+    fn end_frame_without_start_frame_errors() {
+      let mut b = base_builder();
+      b.end_frame = Some(ImageRef::Url(END_URL.to_string()));
+      assert!(build_fal_flux_3_draft_state(b).is_err());
+    }
+
+    #[test]
+    fn reference_images_error() {
+      let mut b = base_builder();
+      b.reference_images = Some(ImageListRef::Urls(vec!["https://example.com/ref.png".to_string()]));
+      assert!(build_fal_flux_3_draft_state(b).is_err());
+    }
+
+    #[test]
+    fn reference_videos_error() {
+      let mut b = base_builder();
+      b.reference_videos = Some(VideoListRef::Urls(vec!["https://example.com/v.mp4".to_string()]));
+      assert!(build_fal_flux_3_draft_state(b).is_err());
+    }
+  }
+
+  fn base_builder() -> GenerateVideoRequestBuilder {
+    GenerateVideoRequestBuilder {
+      model: RouterVideoModel::Flux3Draft,
+      provider: RouterProvider::Fal,
+      prompt: Some("test".to_string()),
+      ..Default::default()
+    }
+  }
+}

crates/api_clients/artcraft/artcraft_router/src/generate/generate_video/providers/fal/flux_3_draft/cost.rs

@@ -0,0 +1,76 @@
+use fal_client::requests::traits::fal_request_cost_calculator_trait::FalRequestCostCalculator;
+
+use crate::generate::generate_video::providers::fal::flux_3_draft::request::{
+  FalFlux3DraftMode, FalFlux3DraftRequestState,
+};
+use crate::generate::generate_video::video_generation_cost_estimate::VideoGenerationCostEstimate;
+
+#[derive(Clone, Debug)]
+pub struct FalFlux3DraftCostState {
+  pub cost_in_usd_cents: u64,
+}
+
+impl FalFlux3DraftCostState {
+  pub fn from_request(request: &FalFlux3DraftRequestState) -> Self {
+    // Cost math is owned by fal_client's per-endpoint
+    // `FalRequestCostCalculator` implementations. The router state just
+    // forwards the result so router cost ≡ fal_client cost by construction.
+    let cost_in_usd_cents = match &request.mode {
+      FalFlux3DraftMode::TextToVideo(req) => req.calculate_cost_in_cents(),
+      FalFlux3DraftMode::ImageToVideo(req) => req.calculate_cost_in_cents(),
+      FalFlux3DraftMode::FirstLastFrameToVideo(req) => req.calculate_cost_in_cents(),
+    };
+    Self { cost_in_usd_cents }
+  }
+
+  pub fn estimate_cost(&self) -> VideoGenerationCostEstimate {
+    VideoGenerationCostEstimate {
+      cost_in_credits: Some(self.cost_in_usd_cents),
+      cost_in_usd_cents: Some(self.cost_in_usd_cents),
+      is_free: false,
+      is_unlimited: false,
+      is_rate_limited: false,
+      has_watermark: false,
+      failures_are_refunded: None,
+    }
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use crate::api::router_provider::RouterProvider;
+  use crate::api::router_video_model::RouterVideoModel;
+  use crate::generate::generate_video::generate_video_request_builder::GenerateVideoRequestBuilder;
+  use crate::generate::generate_video::providers::fal::flux_3_draft::build::build_fal_flux_3_draft_state;
+
+  use super::*;
+
+  // Pricing (from fal_client's flux_3_draft cost modules):
+  //   $0.06/s (always 720p, all modalities)
+  // fal defaults when unset: duration = 5s (auto estimates at the 5s floor).
+
+  #[test]
+  fn t2v_default_settings_is_30() {
+    assert_eq!(cost_cents(base_builder(None)), 30);
+  }
+
+  #[test]
+  fn t2v_20s_is_120() {
+    assert_eq!(cost_cents(base_builder(Some(20))), 120);
+  }
+
+  fn base_builder(duration_seconds: Option<u16>) -> GenerateVideoRequestBuilder {
+    GenerateVideoRequestBuilder {
+      model: RouterVideoModel::Flux3Draft,
+      provider: RouterProvider::Fal,
+      prompt: Some("test".to_string()),
+      duration_seconds,
+      ..Default::default()
+    }
+  }
+
+  fn cost_cents(builder: GenerateVideoRequestBuilder) -> u64 {
+    let state = build_fal_flux_3_draft_state(builder).expect("build");
+    FalFlux3DraftCostState::from_request(&state).cost_in_usd_cents
+  }
+}

crates/api_clients/artcraft/artcraft_router/src/generate/generate_video/providers/fal/flux_3_draft/mod.rs

@@ -0,0 +1,3 @@
+pub mod build;
+pub mod cost;
+pub mod request;

crates/api_clients/artcraft/artcraft_router/src/generate/generate_video/providers/fal/flux_3_draft/request.rs

@@ -0,0 +1,121 @@
+use std::fmt::Debug;
+use std::sync::Arc;
+
+use fal_client::requests::api::video::image::flux_3_draft::api::Flux3DraftImageToVideoRequest;
+use fal_client::requests::api::video::images::flux_3_draft::api::Flux3DraftFirstLastFrameToVideoRequest;
+use fal_client::requests::api::video::text::flux_3_draft::api::Flux3DraftTextToVideoRequest;
+use fal_client::requests::traits::fal_endpoint_trait::FalEndpoint;
+
+use crate::client::router_fal_client::RouterFalClient;
+use crate::errors::artcraft_router_error::ArtcraftRouterError;
+use crate::generate::generate_video::generate_video_response::{
+  FalVideoResponsePayload, GenerateVideoResponse,
+};
+
+#[derive(Clone, Debug)]
+pub enum FalFlux3DraftMode {
+  TextToVideo(Flux3DraftTextToVideoRequest),
+  ImageToVideo(Flux3DraftImageToVideoRequest),
+  FirstLastFrameToVideo(Flux3DraftFirstLastFrameToVideoRequest),
+}
+
+#[derive(Clone, Debug)]
+pub struct FalFlux3DraftRequestState {
+  pub mode: FalFlux3DraftMode,
+}
+
+impl FalFlux3DraftRequestState {
+  pub async fn send(&self, client: &RouterFalClient) -> Result<GenerateVideoResponse, ArtcraftRouterError> {
+    match &self.mode {
+      FalFlux3DraftMode::TextToVideo(request) => send_request(request, client).await,
+      FalFlux3DraftMode::ImageToVideo(request) => send_request(request, client).await,
+      FalFlux3DraftMode::FirstLastFrameToVideo(request) => send_request(request, client).await,
+    }
+  }
+}
+
+// ── Helpers ──
+
+async fn send_request<T>(request: &T, client: &RouterFalClient) -> Result<GenerateVideoResponse, ArtcraftRouterError>
+where
+  T: FalEndpoint + Clone + Debug + Send + Sync + 'static,
+{
+  let outbound: Arc<dyn Debug + Send + Sync> = Arc::new(request.clone());
+  let payload = send_fal_request(request, client).await?;
+  Ok(GenerateVideoResponse::Fal(FalVideoResponsePayload {
+    request_id: payload.request_id,
+    gateway_request_id: payload.gateway_request_id,
+    maybe_status_url: payload.status_url,
+    maybe_response_url: payload.response_url,
+    maybe_outbound_request: Some(outbound),
+  }))
+}
+
+struct FalResponseIds {
+  request_id: Option<String>,
+  gateway_request_id: Option<String>,
+  status_url: Option<String>,
+  response_url: Option<String>,
+}
+
+async fn send_fal_request<T: FalEndpoint>(
+  request: &T,
+  client: &RouterFalClient,
+) -> Result<FalResponseIds, ArtcraftRouterError> {
+  if let Some(webhook_url) = &client.webhook_url {
+    let response = request.send_webhook_request(&client.api_key, webhook_url).await?;
+    Ok(FalResponseIds {
+      request_id: response.request_id,
+      gateway_request_id: response.gateway_request_id,
+      status_url: None,
+      response_url: None,
+    })
+  } else {
+    let response = request.send_queue_request(&client.api_key).await?;
+    Ok(FalResponseIds {
+      request_id: Some(response.request_id),
+      gateway_request_id: None,
+      status_url: Some(response.status_url),
+      response_url: Some(response.response_url),
+    })
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+  use fal_client::creds::fal_api_key::FalApiKey;
+  use fal_client::requests::api::video::text::flux_3::api::{Flux3AspectRatio, Flux3Duration};
+
+  #[tokio::test]
+  #[ignore] // requires real API key, incurs cost
+  async fn send_text_to_video_webhook() {
+    let state = FalFlux3DraftRequestState {
+      mode: FalFlux3DraftMode::TextToVideo(Flux3DraftTextToVideoRequest {
+        prompt: "a calm lake at sunrise".to_string(),
+        duration: Some(Flux3Duration::Seconds(5)),
+        aspect_ratio: Some(Flux3AspectRatio::SixteenByNine),
+        generate_audio: Some(false),
+        safety_tolerance: None,
+      }),
+    };
+    let response = state.send(&client_with_webhook()).await.expect("send should succeed");
+    let payload = response.get_fal_payload().expect("expected Fal payload");
+    assert!(payload.request_id.is_some() || payload.gateway_request_id.is_some());
+  }
+
+  // ── Helpers ──
+
+  fn read_fal_api_key() -> FalApiKey {
+    let secret = std::fs::read_to_string("/Users/bt/Artcraft/credentials/fal_api_key.txt")
+      .expect("Failed to read fal_api_key.txt");
+    FalApiKey::from_str(secret.trim())
+  }
+
+  fn client_with_webhook() -> RouterFalClient {
+    RouterFalClient::new_with_webhook(
+      read_fal_api_key(),
+      "https://example.com/fal-webhook-test".to_string(),
+    )
+  }
+}

crates/api_clients/artcraft/artcraft_router/src/generate/generate_video/providers/fal/minimax_h3/build.rs

@@ -0,0 +1,543 @@
+use fal_client::requests::api::video::image::minimax_h3::api::MinimaxH3ImageToVideoRequest;
+use fal_client::requests::api::video::reference::minimax_h3::api::{
+  MinimaxH3ReferenceToVideoAspectRatio, MinimaxH3ReferenceToVideoRequest,
+};
+use fal_client::requests::api::video::text::minimax_h3::api::{
+  MinimaxH3Resolution, MinimaxH3TextToVideoAspectRatio, MinimaxH3TextToVideoRequest,
+};
+
+use crate::api::audio_list_ref::AudioListRef;
+use crate::api::image_list_ref::ImageListRef;
+use crate::api::router_aspect_ratio::RouterAspectRatio;
+use crate::api::router_resolution::RouterResolution;
+use crate::api::video_list_ref::VideoListRef;
+use crate::client::request_mismatch_mitigation_strategy::RequestMismatchMitigationStrategy;
+use crate::errors::artcraft_router_error::ArtcraftRouterError;
+use crate::errors::client_error::ClientError;
+use crate::generate::generate_video::generate_video_request_builder::GenerateVideoRequestBuilder;
+use crate::generate::generate_video::providers::fal::kling_1_6_pro::build::optional_url;
+use crate::generate::generate_video::providers::fal::minimax_h3::request::{
+  FalMinimaxH3Mode, FalMinimaxH3RequestState,
+};
+use crate::generate::generate_video::video_generation_draft_or_request::VideoGenerationDraftOrRequest;
+use crate::generate::generate_video::video_generation_request::VideoGenerationRequest;
+
+const MAX_REFERENCE_IMAGES: usize = 9;
+const MAX_REFERENCE_VIDEOS: usize = 3;
+const MAX_REFERENCE_AUDIO: usize = 3;
+const MAX_REFERENCE_FILES: usize = 12;
+const MIN_DURATION_SECONDS: u16 = 5;
+const MAX_DURATION_SECONDS: u16 = 15;
+
+#[derive(Debug, Clone, Copy)]
+pub(crate) enum PlanAspectRatio {
+  TwentyOneByNine,
+  SixteenByNine,
+  FourByThree,
+  Square,
+  ThreeByFour,
+  NineBySixteen,
+}
+
+pub fn build_fal_minimax_h3(
+  builder: GenerateVideoRequestBuilder,
+) -> Result<VideoGenerationDraftOrRequest, ArtcraftRouterError> {
+  let state = build_fal_minimax_h3_state(builder)?;
+  Ok(VideoGenerationDraftOrRequest::Request(VideoGenerationRequest::FalMinimaxH3(state)))
+}
+
+pub(crate) fn build_fal_minimax_h3_state(
+  builder: GenerateVideoRequestBuilder,
+) -> Result<FalMinimaxH3RequestState, ArtcraftRouterError> {
+  let strategy = builder.request_mismatch_mitigation_strategy;
+
+  let aspect_ratio = plan_aspect_ratio(builder.aspect_ratio, strategy)?;
+  let resolution = plan_resolution(builder.resolution, strategy)?;
+  let duration = plan_duration(builder.duration_seconds, strategy)?;
+  let prompt = builder.prompt.clone().unwrap_or_default();
+  let reference_image_urls = resolve_image_urls(builder.reference_images.clone())?;
+  let reference_video_urls = resolve_video_urls(builder.reference_videos.clone())?;
+  let reference_audio_urls = resolve_audio_urls(builder.reference_audio.clone())?;
+  let start_image_url = optional_url(builder.start_frame.clone())?;
+  let end_image_url = optional_url(builder.end_frame.clone())?;
+
+  let has_references = !reference_image_urls.is_empty()
+    || !reference_video_urls.is_empty()
+    || !reference_audio_urls.is_empty();
+
+  // Dispatch: any reference asset → reference-to-video; start_frame → image; else → text.
+  let mode = if has_references {
+    if start_image_url.is_some() || end_image_url.is_some() {
+      return Err(ArtcraftRouterError::Client(ClientError::ModelDoesNotSupportOption {
+        field: "reference_images",
+        value: "MiniMax H3 reference-to-video cannot also accept a start_frame or end_frame".to_string(),
+      }));
+    }
+    check_reference_counts(
+      reference_image_urls.len(),
+      reference_video_urls.len(),
+      reference_audio_urls.len(),
+    )?;
+    FalMinimaxH3Mode::ReferenceToVideo(MinimaxH3ReferenceToVideoRequest {
+      prompt,
+      reference_image_urls: non_empty(reference_image_urls),
+      reference_video_urls: non_empty(reference_video_urls),
+      reference_audio_urls: non_empty(reference_audio_urls),
+      duration,
+      resolution,
+      aspect_ratio: aspect_ratio.map(to_reference_aspect_ratio),
+    })
+  } else if let Some(image_url) = start_image_url {
+    // Image-to-video has no aspect_ratio input — the output follows the start
+    // frame — so any requested aspect ratio is silently dropped here.
+    FalMinimaxH3Mode::ImageToVideo(MinimaxH3ImageToVideoRequest {
+      prompt,
+      image_url,
+      end_image_url,
+      duration,
+      resolution,
+    })
+  } else {
+    if end_image_url.is_some() {
+      return Err(ArtcraftRouterError::Client(ClientError::ModelDoesNotSupportOption {
+        field: "end_frame",
+        value: "MiniMax H3 requires a start_frame when end_frame is provided".to_string(),
+      }));
+    }
+    FalMinimaxH3Mode::TextToVideo(MinimaxH3TextToVideoRequest {
+      prompt,
+      duration,
+      resolution,
+      aspect_ratio: aspect_ratio.map(to_t2v_aspect_ratio),
+    })
+  };
+
+  Ok(FalMinimaxH3RequestState { mode })
+}
+
+// ── Input helpers ──
+
+/// fal's reference limits: at most 9 images, 3 videos, 3 audio clips, and 12
+/// files overall; audio cannot be the only reference input.
+fn check_reference_counts(
+  image_count: usize,
+  video_count: usize,
+  audio_count: usize,
+) -> Result<(), ArtcraftRouterError> {
+  if image_count > MAX_REFERENCE_IMAGES {
+    return Err(ArtcraftRouterError::Client(ClientError::ModelDoesNotSupportOption {
+      field: "reference_images",
+      value: format!("MiniMax H3 supports at most {MAX_REFERENCE_IMAGES} reference images, got {image_count}"),
+    }));
+  }
+  if video_count > MAX_REFERENCE_VIDEOS {
+    return Err(ArtcraftRouterError::Client(ClientError::ModelDoesNotSupportOption {
+      field: "reference_videos",
+      value: format!("MiniMax H3 supports at most {MAX_REFERENCE_VIDEOS} reference videos, got {video_count}"),
+    }));
+  }
+  if audio_count > MAX_REFERENCE_AUDIO {
+    return Err(ArtcraftRouterError::Client(ClientError::ModelDoesNotSupportOption {
+      field: "reference_audio",
+      value: format!("MiniMax H3 supports at most {MAX_REFERENCE_AUDIO} reference audio clips, got {audio_count}"),
+    }));
+  }
+  let total = image_count + video_count + audio_count;
+  if total > MAX_REFERENCE_FILES {
+    return Err(ArtcraftRouterError::Client(ClientError::ModelDoesNotSupportOption {
+      field: "reference_images",
+      value: format!("MiniMax H3 supports at most {MAX_REFERENCE_FILES} reference files overall, got {total}"),
+    }));
+  }
+  if audio_count > 0 && image_count == 0 && video_count == 0 {
+    return Err(ArtcraftRouterError::Client(ClientError::ModelDoesNotSupportOption {
+      field: "reference_audio",
+      value: "MiniMax H3 requires at least one reference image or video alongside reference audio".to_string(),
+    }));
+  }
+  Ok(())
+}
+
+fn resolve_image_urls(
+  reference_images: Option<ImageListRef>,
+) -> Result<Vec<String>, ArtcraftRouterError> {
+  match reference_images {
+    None => Ok(vec![]),
+    Some(ImageListRef::Urls(urls)) => Ok(urls),
+    Some(ImageListRef::MediaFileTokens(_)) => {
+      Err(ArtcraftRouterError::Client(ClientError::FalOnlySupportsUrls))
+    }
+  }
+}
+
+fn resolve_video_urls(
+  reference_videos: Option<VideoListRef>,
+) -> Result<Vec<String>, ArtcraftRouterError> {
+  match reference_videos {
+    None => Ok(vec![]),
+    Some(VideoListRef::Urls(urls)) => Ok(urls),
+    Some(VideoListRef::MediaFileTokens(_)) => {
+      Err(ArtcraftRouterError::Client(ClientError::FalOnlySupportsUrls))
+    }
+  }
+}
+
+fn resolve_audio_urls(
+  reference_audio: Option<AudioListRef>,
+) -> Result<Vec<String>, ArtcraftRouterError> {
+  match reference_audio {
+    None => Ok(vec![]),
+    Some(AudioListRef::Urls(urls)) => Ok(urls),
+    Some(AudioListRef::MediaFileTokens(_)) => {
+      Err(ArtcraftRouterError::Client(ClientError::FalOnlySupportsUrls))
+    }
+  }
+}
+
+fn non_empty(urls: Vec<String>) -> Option<Vec<String>> {
+  if urls.is_empty() { None } else { Some(urls) }
+}
+
+// ── Plan helpers ──
+
+/// `None` (including the `Auto*` ratios) leaves the field unset so fal's
+/// per-mode default applies: 16:9 for text-to-video, adaptive for
+/// reference-to-video.
+fn plan_aspect_ratio(
+  aspect_ratio: Option<RouterAspectRatio>,
+  strategy: RequestMismatchMitigationStrategy,
+) -> Result<Option<PlanAspectRatio>, ArtcraftRouterError> {
+  use PlanAspectRatio as Ar;
+  match aspect_ratio {
+    None
+    | Some(RouterAspectRatio::Auto)
+    | Some(RouterAspectRatio::Auto2k)
+    | Some(RouterAspectRatio::Auto3k)
+    | Some(RouterAspectRatio::Auto4k) => Ok(None),
+
+    Some(RouterAspectRatio::WideTwentyOneByNine) => Ok(Some(Ar::TwentyOneByNine)),
+    Some(RouterAspectRatio::WideSixteenByNine) | Some(RouterAspectRatio::Wide) => Ok(Some(Ar::SixteenByNine)),
+    Some(RouterAspectRatio::TallNineBySixteen) | Some(RouterAspectRatio::Tall) => Ok(Some(Ar::NineBySixteen)),
+    Some(RouterAspectRatio::WideFourByThree) => Ok(Some(Ar::FourByThree)),
+    Some(RouterAspectRatio::TallThreeByFour) => Ok(Some(Ar::ThreeByFour)),
+    Some(RouterAspectRatio::Square) | Some(RouterAspectRatio::SquareHd) => Ok(Some(Ar::Square)),
+
+    Some(other) => match strategy {
+      RequestMismatchMitigationStrategy::ErrorOut => {
+        Err(ArtcraftRouterError::Client(ClientError::ModelDoesNotSupportOption {
+          field: "aspect_ratio",
+          value: format!("{:?}", other),
+        }))
+      }
+      _ => Ok(Some(Ar::SixteenByNine)),
+    },
+  }
+}
+
+/// MiniMax H3 offers exactly two output sizes: 768P and 2K.
+fn plan_resolution(
+  resolution: Option<RouterResolution>,
+  strategy: RequestMismatchMitigationStrategy,
+) -> Result<Option<MinimaxH3Resolution>, ArtcraftRouterError> {
+  match resolution {
+    None => Ok(None),
+
+    // 480p/720p round up to 768P, the smallest size H3 offers.
+    Some(RouterResolution::FourEightyP)
+    | Some(RouterResolution::SevenTwentyP) => Ok(Some(MinimaxH3Resolution::SevenSixtyEightP)),
+    Some(RouterResolution::TenEightyP)
+    | Some(RouterResolution::TwoK) => Ok(Some(MinimaxH3Resolution::TwoK)),
+
+    Some(other) => match strategy {
+      RequestMismatchMitigationStrategy::ErrorOut => {
+        Err(ArtcraftRouterError::Client(ClientError::ModelDoesNotSupportOption {
+          field: "resolution",
+          value: format!("{:?}", other),
+        }))
+      }
+      RequestMismatchMitigationStrategy::PayMoreUpgrade => Ok(Some(MinimaxH3Resolution::TwoK)),
+      RequestMismatchMitigationStrategy::PayLessDowngrade => Ok(Some(MinimaxH3Resolution::SevenSixtyEightP)),
+    },
+  }
+}
+
+fn plan_duration(
+  duration_seconds: Option<u16>,
+  strategy: RequestMismatchMitigationStrategy,
+) -> Result<Option<u8>, ArtcraftRouterError> {
+  match duration_seconds {
+    None => Ok(None),
+    Some(seconds) if (MIN_DURATION_SECONDS..=MAX_DURATION_SECONDS).contains(&seconds) => {
+      Ok(Some(seconds as u8))
+    }
+    Some(other) => match strategy {
+      RequestMismatchMitigationStrategy::ErrorOut => {
+        Err(ArtcraftRouterError::Client(ClientError::ModelDoesNotSupportOption {
+          field: "duration_seconds",
+          value: format!("{}", other),
+        }))
+      }
+      RequestMismatchMitigationStrategy::PayMoreUpgrade
+      | RequestMismatchMitigationStrategy::PayLessDowngrade => {
+        Ok(Some(other.clamp(MIN_DURATION_SECONDS, MAX_DURATION_SECONDS) as u8))
+      }
+    },
+  }
+}
+
+// ── Leaf converters ──
+
+fn to_t2v_aspect_ratio(a: PlanAspectRatio) -> MinimaxH3TextToVideoAspectRatio {
+  match a {
+    PlanAspectRatio::TwentyOneByNine => MinimaxH3TextToVideoAspectRatio::TwentyOneByNine,
+    PlanAspectRatio::SixteenByNine => MinimaxH3TextToVideoAspectRatio::SixteenByNine,
+    PlanAspectRatio::FourByThree => MinimaxH3TextToVideoAspectRatio::FourByThree,
+    PlanAspectRatio::Square => MinimaxH3TextToVideoAspectRatio::Square,
+    PlanAspectRatio::ThreeByFour => MinimaxH3TextToVideoAspectRatio::ThreeByFour,
+    PlanAspectRatio::NineBySixteen => MinimaxH3TextToVideoAspectRatio::NineBySixteen,
+  }
+}
+
+fn to_reference_aspect_ratio(a: PlanAspectRatio) -> MinimaxH3ReferenceToVideoAspectRatio {
+  match a {
+    PlanAspectRatio::TwentyOneByNine => MinimaxH3ReferenceToVideoAspectRatio::TwentyOneByNine,
+    PlanAspectRatio::SixteenByNine => MinimaxH3ReferenceToVideoAspectRatio::SixteenByNine,
+    PlanAspectRatio::FourByThree => MinimaxH3ReferenceToVideoAspectRatio::FourByThree,
+    PlanAspectRatio::Square => MinimaxH3ReferenceToVideoAspectRatio::Square,
+    PlanAspectRatio::ThreeByFour => MinimaxH3ReferenceToVideoAspectRatio::ThreeByFour,
+    PlanAspectRatio::NineBySixteen => MinimaxH3ReferenceToVideoAspectRatio::NineBySixteen,
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use crate::api::image_ref::ImageRef;
+  use crate::api::router_provider::RouterProvider;
+  use crate::api::router_video_model::RouterVideoModel;
+
+  use super::*;
+
+  const START_URL: &str = "https://example.com/start.png";
+  const END_URL: &str = "https://example.com/end.png";
+
+  mod dispatch_tests {
+    use super::*;
+
+    #[test]
+    fn no_inputs_picks_t2v() {
+      let state = build_fal_minimax_h3_state(base_builder()).expect("build");
+      assert!(matches!(state.mode, FalMinimaxH3Mode::TextToVideo(_)));
+    }
+
+    #[test]
+    fn start_frame_picks_i2v() {
+      let mut b = base_builder();
+      b.start_frame = Some(ImageRef::Url(START_URL.to_string()));
+      let state = build_fal_minimax_h3_state(b).expect("build");
+      assert!(matches!(state.mode, FalMinimaxH3Mode::ImageToVideo(_)));
+    }
+
+    #[test]
+    fn start_and_end_frame_picks_i2v_with_end_image_url() {
+      let mut b = base_builder();
+      b.start_frame = Some(ImageRef::Url(START_URL.to_string()));
+      b.end_frame = Some(ImageRef::Url(END_URL.to_string()));
+      let state = build_fal_minimax_h3_state(b).expect("build");
+      let FalMinimaxH3Mode::ImageToVideo(req) = state.mode else {
+        panic!("expected ImageToVideo");
+      };
+      assert_eq!(req.image_url, START_URL);
+      assert_eq!(req.end_image_url.as_deref(), Some(END_URL));
+    }
+
+    #[test]
+    fn end_frame_without_start_frame_errors() {
+      let mut b = base_builder();
+      b.end_frame = Some(ImageRef::Url(END_URL.to_string()));
+      assert!(build_fal_minimax_h3_state(b).is_err());
+    }
+
+    #[test]
+    fn reference_images_pick_reference_to_video() {
+      let state = build_fal_minimax_h3_state(builder_with_reference_images(3)).expect("build");
+      let FalMinimaxH3Mode::ReferenceToVideo(req) = state.mode else {
+        panic!("expected ReferenceToVideo");
+      };
+      assert_eq!(req.reference_image_urls.map(|urls| urls.len()), Some(3));
+      assert_eq!(req.reference_video_urls, None);
+      assert_eq!(req.reference_audio_urls, None);
+    }
+
+    #[test]
+    fn reference_videos_pick_reference_to_video() {
+      let mut b = base_builder();
+      b.reference_videos = Some(VideoListRef::Urls(vec!["https://example.com/a.mp4".to_string()]));
+      let state = build_fal_minimax_h3_state(b).expect("build");
+      let FalMinimaxH3Mode::ReferenceToVideo(req) = state.mode else {
+        panic!("expected ReferenceToVideo");
+      };
+      assert_eq!(req.reference_video_urls.map(|urls| urls.len()), Some(1));
+    }
+
+    #[test]
+    fn ten_reference_images_error() {
+      assert!(build_fal_minimax_h3_state(builder_with_reference_images(10)).is_err());
+    }
+
+    #[test]
+    fn four_reference_videos_error() {
+      let mut b = base_builder();
+      b.reference_videos = Some(VideoListRef::Urls(
+        (0..4).map(|i| format!("https://example.com/v-{i}.mp4")).collect(),
+      ));
+      assert!(build_fal_minimax_h3_state(b).is_err());
+    }
+
+    #[test]
+    fn thirteen_reference_files_error() {
+      // 9 images + 3 videos + 1 audio = 13 > 12 total.
+      let mut b = builder_with_reference_images(9);
+      b.reference_videos = Some(VideoListRef::Urls(
+        (0..3).map(|i| format!("https://example.com/v-{i}.mp4")).collect(),
+      ));
+      b.reference_audio = Some(AudioListRef::Urls(vec!["https://example.com/a.mp3".to_string()]));
+      assert!(build_fal_minimax_h3_state(b).is_err());
+    }
+
+    #[test]
+    fn audio_only_reference_errors() {
+      let mut b = base_builder();
+      b.reference_audio = Some(AudioListRef::Urls(vec!["https://example.com/a.mp3".to_string()]));
+      assert!(build_fal_minimax_h3_state(b).is_err());
+    }
+
+    #[test]
+    fn reference_images_with_start_frame_error() {
+      let mut b = builder_with_reference_images(2);
+      b.start_frame = Some(ImageRef::Url(START_URL.to_string()));
+      assert!(build_fal_minimax_h3_state(b).is_err());
+    }
+  }
+
+  mod plan_tests {
+    use super::*;
+
+    #[test]
+    fn duration_20_errors_under_error_out() {
+      let mut b = base_builder();
+      b.duration_seconds = Some(20);
+      b.request_mismatch_mitigation_strategy = RequestMismatchMitigationStrategy::ErrorOut;
+      assert!(build_fal_minimax_h3_state(b).is_err());
+    }
+
+    #[test]
+    fn duration_20_clamps_to_15_under_pay_less() {
+      let mut b = base_builder();
+      b.duration_seconds = Some(20);
+      b.request_mismatch_mitigation_strategy = RequestMismatchMitigationStrategy::PayLessDowngrade;
+      let state = build_fal_minimax_h3_state(b).expect("build");
+      let FalMinimaxH3Mode::TextToVideo(req) = state.mode else {
+        panic!("expected TextToVideo");
+      };
+      assert_eq!(req.duration, Some(15));
+    }
+
+    #[test]
+    fn duration_3_clamps_to_5_under_pay_less() {
+      let mut b = base_builder();
+      b.duration_seconds = Some(3);
+      b.request_mismatch_mitigation_strategy = RequestMismatchMitigationStrategy::PayLessDowngrade;
+      let state = build_fal_minimax_h3_state(b).expect("build");
+      let FalMinimaxH3Mode::TextToVideo(req) = state.mode else {
+        panic!("expected TextToVideo");
+      };
+      assert_eq!(req.duration, Some(5));
+    }
+
+    #[test]
+    fn resolution_480p_and_720p_map_to_768p() {
+      for res in [RouterResolution::FourEightyP, RouterResolution::SevenTwentyP] {
+        let mut b = base_builder();
+        b.resolution = Some(res);
+        let state = build_fal_minimax_h3_state(b).expect("build");
+        let FalMinimaxH3Mode::TextToVideo(req) = state.mode else {
+          panic!("expected TextToVideo");
+        };
+        assert_eq!(req.resolution, Some(MinimaxH3Resolution::SevenSixtyEightP), "res={res:?}");
+      }
+    }
+
+    #[test]
+    fn resolution_1080p_and_2k_map_to_2k() {
+      for res in [RouterResolution::TenEightyP, RouterResolution::TwoK] {
+        let mut b = base_builder();
+        b.resolution = Some(res);
+        let state = build_fal_minimax_h3_state(b).expect("build");
+        let FalMinimaxH3Mode::TextToVideo(req) = state.mode else {
+          panic!("expected TextToVideo");
+        };
+        assert_eq!(req.resolution, Some(MinimaxH3Resolution::TwoK), "res={res:?}");
+      }
+    }
+
+    #[test]
+    fn resolution_4k_errors_under_error_out() {
+      let mut b = base_builder();
+      b.resolution = Some(RouterResolution::FourK);
+      b.request_mismatch_mitigation_strategy = RequestMismatchMitigationStrategy::ErrorOut;
+      assert!(build_fal_minimax_h3_state(b).is_err());
+    }
+
+    #[test]
+    fn twenty_one_by_nine_is_supported() {
+      let mut b = base_builder();
+      b.aspect_ratio = Some(RouterAspectRatio::WideTwentyOneByNine);
+      b.request_mismatch_mitigation_strategy = RequestMismatchMitigationStrategy::ErrorOut;
+      let state = build_fal_minimax_h3_state(b).expect("build");
+      let FalMinimaxH3Mode::TextToVideo(req) = state.mode else {
+        panic!("expected TextToVideo");
+      };
+      assert_eq!(req.aspect_ratio, Some(MinimaxH3TextToVideoAspectRatio::TwentyOneByNine));
+    }
+
+    #[test]
+    fn auto_aspect_ratio_is_left_unset() {
+      let mut b = base_builder();
+      b.aspect_ratio = Some(RouterAspectRatio::Auto);
+      let state = build_fal_minimax_h3_state(b).expect("build");
+      let FalMinimaxH3Mode::TextToVideo(req) = state.mode else {
+        panic!("expected TextToVideo");
+      };
+      assert_eq!(req.aspect_ratio, None);
+    }
+
+    #[test]
+    fn i2v_aspect_ratio_is_silently_dropped() {
+      let mut b = base_builder();
+      b.start_frame = Some(ImageRef::Url(START_URL.to_string()));
+      b.aspect_ratio = Some(RouterAspectRatio::TallNineBySixteen);
+      b.request_mismatch_mitigation_strategy = RequestMismatchMitigationStrategy::ErrorOut;
+      // Image-to-video has no aspect_ratio field; the request still builds.
+      let state = build_fal_minimax_h3_state(b).expect("build");
+      assert!(matches!(state.mode, FalMinimaxH3Mode::ImageToVideo(_)));
+    }
+  }
+
+  fn base_builder() -> GenerateVideoRequestBuilder {
+    GenerateVideoRequestBuilder {
+      model: RouterVideoModel::MinimaxH3,
+      provider: RouterProvider::Fal,
+      prompt: Some("test".to_string()),
+      ..Default::default()
+    }
+  }
+
+  fn builder_with_reference_images(count: usize) -> GenerateVideoRequestBuilder {
+    let urls = (0..count)
+      .map(|i| format!("https://example.com/ref-{}.png", i))
+      .collect();
+    let mut b = base_builder();
+    b.reference_images = Some(ImageListRef::Urls(urls));
+    b
+  }
+}

crates/api_clients/artcraft/artcraft_router/src/generate/generate_video/providers/fal/minimax_h3/cost.rs

@@ -0,0 +1,129 @@
+use fal_client::requests::traits::fal_request_cost_calculator_trait::FalRequestCostCalculator;
+
+use crate::generate::generate_video::providers::fal::minimax_h3::request::{
+  FalMinimaxH3Mode, FalMinimaxH3RequestState,
+};
+use crate::generate::generate_video::video_generation_cost_estimate::VideoGenerationCostEstimate;
+
+#[derive(Clone, Debug)]
+pub struct FalMinimaxH3CostState {
+  pub cost_in_usd_cents: u64,
+}
+
+impl FalMinimaxH3CostState {
+  pub fn from_request(request: &FalMinimaxH3RequestState) -> Self {
+    // Cost math is owned by fal_client's per-endpoint
+    // `FalRequestCostCalculator` implementations. The router state just
+    // forwards the result so router cost ≡ fal_client cost by construction.
+    let cost_in_usd_cents = match &request.mode {
+      FalMinimaxH3Mode::TextToVideo(req) => req.calculate_cost_in_cents(),
+      FalMinimaxH3Mode::ImageToVideo(req) => req.calculate_cost_in_cents(),
+      FalMinimaxH3Mode::ReferenceToVideo(req) => req.calculate_cost_in_cents(),
+    };
+    Self { cost_in_usd_cents }
+  }
+
+  pub fn estimate_cost(&self) -> VideoGenerationCostEstimate {
+    VideoGenerationCostEstimate {
+      cost_in_credits: Some(self.cost_in_usd_cents),
+      cost_in_usd_cents: Some(self.cost_in_usd_cents),
+      is_free: false,
+      is_unlimited: false,
+      is_rate_limited: false,
+      has_watermark: false,
+      failures_are_refunded: None,
+    }
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use crate::api::image_list_ref::ImageListRef;
+  use crate::api::image_ref::ImageRef;
+  use crate::api::router_provider::RouterProvider;
+  use crate::api::router_resolution::RouterResolution;
+  use crate::api::router_video_model::RouterVideoModel;
+  use crate::generate::generate_video::generate_video_request_builder::GenerateVideoRequestBuilder;
+  use crate::generate::generate_video::providers::fal::minimax_h3::build::build_fal_minimax_h3_state;
+
+  use super::*;
+
+  // Pricing (from fal_client's minimax_h3 cost modules):
+  //   768P: $0.16/sec → 5s = 80¢
+  //   2K:   $0.26/sec → 5s = 130¢, 10s = 260¢
+  // Reference-to-video additionally bills 8¢ per reference image beyond the
+  // first 5. fal defaults when unset: duration = 5s, resolution = 2K.
+
+  #[test]
+  fn t2v_default_settings_is_130() {
+    assert_eq!(cost_cents(base_builder(None, None)), 130);
+  }
+
+  #[test]
+  fn t2v_5s_768p_is_80() {
+    // RouterResolution::SevenTwentyP maps to H3's 768P.
+    assert_eq!(cost_cents(base_builder(Some(5), Some(RouterResolution::SevenTwentyP))), 80);
+  }
+
+  #[test]
+  fn t2v_10s_2k_is_260() {
+    assert_eq!(cost_cents(base_builder(Some(10), Some(RouterResolution::TenEightyP))), 260);
+  }
+
+  #[test]
+  fn i2v_5s_768p_is_80() {
+    let mut b = base_builder(Some(5), Some(RouterResolution::FourEightyP));
+    b.start_frame = Some(ImageRef::Url("https://example.com/start.png".to_string()));
+    assert_eq!(cost_cents(b), 80);
+  }
+
+  #[test]
+  fn reference_five_images_5s_2k_is_130() {
+    assert_eq!(cost_cents(builder_with_references(5, Some(RouterResolution::TenEightyP))), 130);
+  }
+
+  #[test]
+  fn reference_nine_images_5s_2k_is_162() {
+    // 130¢ video + 4 extra images × 8¢ = 162¢.
+    assert_eq!(cost_cents(builder_with_references(9, Some(RouterResolution::TenEightyP))), 162);
+  }
+
+  #[test]
+  fn estimate_cost_forwards_cents() {
+    let estimate = FalMinimaxH3CostState { cost_in_usd_cents: 130 }.estimate_cost();
+    assert_eq!(estimate.cost_in_usd_cents, Some(130));
+    assert_eq!(estimate.cost_in_credits, Some(130));
+    assert!(!estimate.is_free);
+  }
+
+  fn base_builder(
+    duration_seconds: Option<u16>,
+    resolution: Option<RouterResolution>,
+  ) -> GenerateVideoRequestBuilder {
+    GenerateVideoRequestBuilder {
+      model: RouterVideoModel::MinimaxH3,
+      provider: RouterProvider::Fal,
+      prompt: Some("test".to_string()),
+      duration_seconds,
+      resolution,
+      ..Default::default()
+    }
+  }
+
+  fn builder_with_references(
+    image_count: usize,
+    resolution: Option<RouterResolution>,
+  ) -> GenerateVideoRequestBuilder {
+    let urls = (0..image_count)
+      .map(|i| format!("https://example.com/ref-{}.png", i))
+      .collect();
+    let mut b = base_builder(Some(5), resolution);
+    b.reference_images = Some(ImageListRef::Urls(urls));
+    b
+  }
+
+  fn cost_cents(builder: GenerateVideoRequestBuilder) -> u64 {
+    let state = build_fal_minimax_h3_state(builder).expect("build");
+    FalMinimaxH3CostState::from_request(&state).cost_in_usd_cents
+  }
+}

crates/api_clients/artcraft/artcraft_router/src/generate/generate_video/providers/fal/minimax_h3/mod.rs

@@ -0,0 +1,3 @@
+pub mod build;
+pub mod cost;
+pub mod request;

crates/api_clients/artcraft/artcraft_router/src/generate/generate_video/providers/fal/minimax_h3/request.rs

@@ -0,0 +1,140 @@
+use std::fmt::Debug;
+use std::sync::Arc;
+
+use fal_client::requests::api::video::image::minimax_h3::api::MinimaxH3ImageToVideoRequest;
+use fal_client::requests::api::video::reference::minimax_h3::api::MinimaxH3ReferenceToVideoRequest;
+use fal_client::requests::api::video::text::minimax_h3::api::MinimaxH3TextToVideoRequest;
+use fal_client::requests::traits::fal_endpoint_trait::FalEndpoint;
+
+use crate::client::router_fal_client::RouterFalClient;
+use crate::errors::artcraft_router_error::ArtcraftRouterError;
+use crate::generate::generate_video::generate_video_response::{
+  FalVideoResponsePayload, GenerateVideoResponse,
+};
+
+#[derive(Clone, Debug)]
+pub enum FalMinimaxH3Mode {
+  TextToVideo(MinimaxH3TextToVideoRequest),
+  ImageToVideo(MinimaxH3ImageToVideoRequest),
+  ReferenceToVideo(MinimaxH3ReferenceToVideoRequest),
+}
+
+#[derive(Clone, Debug)]
+pub struct FalMinimaxH3RequestState {
+  pub mode: FalMinimaxH3Mode,
+}
+
+impl FalMinimaxH3RequestState {
+  pub async fn send(&self, client: &RouterFalClient) -> Result<GenerateVideoResponse, ArtcraftRouterError> {
+    match &self.mode {
+      FalMinimaxH3Mode::TextToVideo(request) => send_request(request, client).await,
+      FalMinimaxH3Mode::ImageToVideo(request) => send_request(request, client).await,
+      FalMinimaxH3Mode::ReferenceToVideo(request) => send_request(request, client).await,
+    }
+  }
+}
+
+// ── Helpers ──
+
+async fn send_request<T>(request: &T, client: &RouterFalClient) -> Result<GenerateVideoResponse, ArtcraftRouterError>
+where
+  T: FalEndpoint + Clone + Debug + Send + Sync + 'static,
+{
+  let outbound: Arc<dyn Debug + Send + Sync> = Arc::new(request.clone());
+  let payload = send_fal_request(request, client).await?;
+  Ok(GenerateVideoResponse::Fal(FalVideoResponsePayload {
+    request_id: payload.request_id,
+    gateway_request_id: payload.gateway_request_id,
+    maybe_status_url: payload.status_url,
+    maybe_response_url: payload.response_url,
+    maybe_outbound_request: Some(outbound),
+  }))
+}
+
+struct FalResponseIds {
+  request_id: Option<String>,
+  gateway_request_id: Option<String>,
+  status_url: Option<String>,
+  response_url: Option<String>,
+}
+
+async fn send_fal_request<T: FalEndpoint>(
+  request: &T,
+  client: &RouterFalClient,
+) -> Result<FalResponseIds, ArtcraftRouterError> {
+  if let Some(webhook_url) = &client.webhook_url {
+    let response = request.send_webhook_request(&client.api_key, webhook_url).await?;
+    Ok(FalResponseIds {
+      request_id: response.request_id,
+      gateway_request_id: response.gateway_request_id,
+      status_url: None,
+      response_url: None,
+    })
+  } else {
+    let response = request.send_queue_request(&client.api_key).await?;
+    Ok(FalResponseIds {
+      request_id: Some(response.request_id),
+      gateway_request_id: None,
+      status_url: Some(response.status_url),
+      response_url: Some(response.response_url),
+    })
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+  use fal_client::creds::fal_api_key::FalApiKey;
+  use fal_client::requests::api::video::text::minimax_h3::api::{
+    MinimaxH3Resolution, MinimaxH3TextToVideoAspectRatio,
+  };
+  use test_data::web::image_urls::JUNO_AT_LAKE_IMAGE_URL;
+
+  #[tokio::test]
+  #[ignore] // requires real API key, incurs cost
+  async fn send_text_to_video_webhook() {
+    let state = FalMinimaxH3RequestState {
+      mode: FalMinimaxH3Mode::TextToVideo(MinimaxH3TextToVideoRequest {
+        prompt: "a calm lake at sunrise".to_string(),
+        duration: Some(5),
+        resolution: Some(MinimaxH3Resolution::SevenSixtyEightP),
+        aspect_ratio: Some(MinimaxH3TextToVideoAspectRatio::SixteenByNine),
+      }),
+    };
+    let response = state.send(&client_with_webhook()).await.expect("send should succeed");
+    let payload = response.get_fal_payload().expect("expected Fal payload");
+    assert!(payload.request_id.is_some() || payload.gateway_request_id.is_some());
+  }
+
+  #[tokio::test]
+  #[ignore] // requires real API key, incurs cost
+  async fn send_image_to_video_webhook() {
+    let state = FalMinimaxH3RequestState {
+      mode: FalMinimaxH3Mode::ImageToVideo(MinimaxH3ImageToVideoRequest {
+        prompt: "the lake comes alive".to_string(),
+        image_url: JUNO_AT_LAKE_IMAGE_URL.to_string(),
+        end_image_url: None,
+        duration: Some(5),
+        resolution: Some(MinimaxH3Resolution::SevenSixtyEightP),
+      }),
+    };
+    let response = state.send(&client_with_webhook()).await.expect("send should succeed");
+    let payload = response.get_fal_payload().expect("expected Fal payload");
+    assert!(payload.request_id.is_some() || payload.gateway_request_id.is_some());
+  }
+
+  // ── Helpers ──
+
+  fn read_fal_api_key() -> FalApiKey {
+    let secret = std::fs::read_to_string("/Users/bt/Artcraft/credentials/fal_api_key.txt")
+      .expect("Failed to read fal_api_key.txt");
+    FalApiKey::from_str(secret.trim())
+  }
+
+  fn client_with_webhook() -> RouterFalClient {
+    RouterFalClient::new_with_webhook(
+      read_fal_api_key(),
+      "https://example.com/fal-webhook-test".to_string(),
+    )
+  }
+}

crates/api_clients/artcraft/artcraft_router/src/generate/generate_video/providers/fal/mod.rs

@@ -1,3 +1,5 @@
+pub mod flux_3;
+pub mod flux_3_draft;
 pub mod kling_1_6_pro;
 pub mod kling_2_1_master;
 pub mod kling_2_1_pro;
@@ -5,6 +7,7 @@ pub mod kling_2_5_turbo_pro;
 pub mod kling_2_6_pro;
 pub mod kling_3p0_pro;
 pub mod kling_3p0_standard;
+pub mod minimax_h3;
 pub mod seedance_1p0_lite;
 pub mod seedance_1p5_pro;
 pub mod sora_2;

crates/api_clients/artcraft/artcraft_router/src/generate/generate_video/video_generation_request.rs

@@ -21,8 +21,14 @@ use crate::generate::generate_video::providers::artcraft::kling_2_6_pro::cost::A
 use crate::generate::generate_video::providers::artcraft::kling_2_6_pro::request::ArtcraftKling2p6ProRequestState;
 use crate::generate::generate_video::providers::artcraft::kling_3p0_pro::cost::ArtcraftKling3p0ProCostState;
 use crate::generate::generate_video::providers::artcraft::kling_3p0_pro::request::ArtcraftKling3p0ProRequestState;
+use crate::generate::generate_video::providers::artcraft::flux_3::cost::ArtcraftFlux3CostState;
+use crate::generate::generate_video::providers::artcraft::flux_3::request::ArtcraftFlux3RequestState;
+use crate::generate::generate_video::providers::artcraft::flux_3_draft::cost::ArtcraftFlux3DraftCostState;
+use crate::generate::generate_video::providers::artcraft::flux_3_draft::request::ArtcraftFlux3DraftRequestState;
 use crate::generate::generate_video::providers::artcraft::kling_3p0_standard::cost::ArtcraftKling3p0StandardCostState;
 use crate::generate::generate_video::providers::artcraft::kling_3p0_standard::request::ArtcraftKling3p0StandardRequestState;
+use crate::generate::generate_video::providers::artcraft::minimax_h3::cost::ArtcraftMinimaxH3CostState;
+use crate::generate::generate_video::providers::artcraft::minimax_h3::request::ArtcraftMinimaxH3RequestState;
 use crate::generate::generate_video::providers::artcraft::preview_model::cost::ArtcraftPreviewModelCostState;
 use crate::generate::generate_video::providers::artcraft::preview_model::request::ArtcraftPreviewModelRequestState;
 use crate::generate::generate_video::providers::artcraft::preview_model_fast::cost::ArtcraftPreviewModelFastCostState;
@@ -87,8 +93,14 @@ use crate::generate::generate_video::providers::fal::kling_2_6_pro::cost::FalKli
 use crate::generate::generate_video::providers::fal::kling_2_6_pro::request::FalKling2p6ProRequestState;
 use crate::generate::generate_video::providers::fal::kling_3p0_pro::cost::FalKling3p0ProCostState;
 use crate::generate::generate_video::providers::fal::kling_3p0_pro::request::FalKling3p0ProRequestState;
+use crate::generate::generate_video::providers::fal::flux_3::cost::FalFlux3CostState;
+use crate::generate::generate_video::providers::fal::flux_3::request::FalFlux3RequestState;
+use crate::generate::generate_video::providers::fal::flux_3_draft::cost::FalFlux3DraftCostState;
+use crate::generate::generate_video::providers::fal::flux_3_draft::request::FalFlux3DraftRequestState;
 use crate::generate::generate_video::providers::fal::kling_3p0_standard::cost::FalKling3p0StandardCostState;
 use crate::generate::generate_video::providers::fal::kling_3p0_standard::request::FalKling3p0StandardRequestState;
+use crate::generate::generate_video::providers::fal::minimax_h3::cost::FalMinimaxH3CostState;
+use crate::generate::generate_video::providers::fal::minimax_h3::request::FalMinimaxH3RequestState;
 use crate::generate::generate_video::providers::fal::seedance_1p0_lite::cost::FalSeedance10LiteCostState;
 use crate::generate::generate_video::providers::fal::seedance_1p0_lite::request::FalSeedance10LiteRequestState;
 use crate::generate::generate_video::providers::fal::sora_2::cost::FalSora2CostState;
@@ -136,6 +148,8 @@ use crate::generate::generate_video::providers::kinovi::seedance_2p5_preview::re
 pub enum VideoGenerationRequest {
   ArtcraftGrokImagineVideo(ArtcraftGrokImagineVideoRequestState),
   ArtcraftGrokImagineVideo1p5(ArtcraftGrokImagineVideo1p5RequestState),
+  ArtcraftFlux3(ArtcraftFlux3RequestState),
+  ArtcraftFlux3Draft(ArtcraftFlux3DraftRequestState),
   ArtcraftHappyHorse1p0(ArtcraftHappyHorse1p0RequestState),
   ArtcraftKling16Pro(ArtcraftKling16ProRequestState),
   ArtcraftKling21Master(ArtcraftKling21MasterRequestState),
@@ -144,6 +158,7 @@ pub enum VideoGenerationRequest {
   ArtcraftKling2p6Pro(ArtcraftKling2p6ProRequestState),
   ArtcraftKling3p0Pro(ArtcraftKling3p0ProRequestState),
   ArtcraftKling3p0Standard(ArtcraftKling3p0StandardRequestState),
+  ArtcraftMinimaxH3(ArtcraftMinimaxH3RequestState),
   ArtcraftPreviewModel(ArtcraftPreviewModelRequestState),
   ArtcraftPreviewModelFast(ArtcraftPreviewModelFastRequestState),
   ArtcraftSeedance10Lite(ArtcraftSeedance10LiteRequestState),
@@ -170,6 +185,8 @@ pub enum VideoGenerationRequest {
   ArtcraftVeo3p1Lite(ArtcraftVeo3p1LiteRequestState),
   ArtcraftViduQ3(ArtcraftViduQ3RequestState),
   ArtcraftViduQ3Turbo(ArtcraftViduQ3TurboRequestState),
+  FalFlux3(FalFlux3RequestState),
+  FalFlux3Draft(FalFlux3DraftRequestState),
   FalKling16Pro(FalKling16ProRequestState),
   FalKling21Master(FalKling21MasterRequestState),
   FalKling21Pro(FalKling21ProRequestState),
@@ -177,6 +194,7 @@ pub enum VideoGenerationRequest {
   FalKling2p6Pro(FalKling2p6ProRequestState),
   FalKling3p0Pro(FalKling3p0ProRequestState),
   FalKling3p0Standard(FalKling3p0StandardRequestState),
+  FalMinimaxH3(FalMinimaxH3RequestState),
   FalSeedance10Lite(FalSeedance10LiteRequestState),
   FalSeedance1p5Pro(FalSeedance1p5ProRequestState),
   FalSora2(FalSora2RequestState),
@@ -213,7 +231,10 @@ impl VideoGenerationRequest {
       Self::ArtcraftKling2p5TurboPro(_) => RouterProvider::Artcraft,
       Self::ArtcraftKling2p6Pro(_) => RouterProvider::Artcraft,
       Self::ArtcraftKling3p0Pro(_) => RouterProvider::Artcraft,
+      Self::ArtcraftFlux3(_) => RouterProvider::Artcraft,
+      Self::ArtcraftFlux3Draft(_) => RouterProvider::Artcraft,
       Self::ArtcraftKling3p0Standard(_) => RouterProvider::Artcraft,
+      Self::ArtcraftMinimaxH3(_) => RouterProvider::Artcraft,
       Self::ArtcraftPreviewModel(_) => RouterProvider::Artcraft,
       Self::ArtcraftPreviewModelFast(_) => RouterProvider::Artcraft,
       Self::ArtcraftSeedance10Lite(_) => RouterProvider::Artcraft,
@@ -246,7 +267,10 @@ impl VideoGenerationRequest {
       Self::FalKling2p5TurboPro(_) => RouterProvider::Fal,
       Self::FalKling2p6Pro(_) => RouterProvider::Fal,
       Self::FalKling3p0Pro(_) => RouterProvider::Fal,
+      Self::FalFlux3(_) => RouterProvider::Fal,
+      Self::FalFlux3Draft(_) => RouterProvider::Fal,
       Self::FalKling3p0Standard(_) => RouterProvider::Fal,
+      Self::FalMinimaxH3(_) => RouterProvider::Fal,
       Self::FalSeedance10Lite(_) => RouterProvider::Fal,
       Self::FalSeedance1p5Pro(_) => RouterProvider::Fal,
       Self::FalSora2(_) => RouterProvider::Fal,
@@ -283,7 +307,10 @@ impl VideoGenerationRequest {
       VideoGenerationRequest::ArtcraftKling2p5TurboPro(request) => Ok(ArtcraftKling2p5TurboProCostState::from_request(request).estimate_cost()),
       VideoGenerationRequest::ArtcraftKling2p6Pro(request) => Ok(ArtcraftKling2p6ProCostState::from_request(request).estimate_cost()),
       VideoGenerationRequest::ArtcraftKling3p0Pro(request) => Ok(ArtcraftKling3p0ProCostState::from_request(request).estimate_cost()),
+      VideoGenerationRequest::ArtcraftFlux3(request) => Ok(ArtcraftFlux3CostState::from_request(request).estimate_cost()),
+      VideoGenerationRequest::ArtcraftFlux3Draft(request) => Ok(ArtcraftFlux3DraftCostState::from_request(request).estimate_cost()),
       VideoGenerationRequest::ArtcraftKling3p0Standard(request) => Ok(ArtcraftKling3p0StandardCostState::from_request(request).estimate_cost()),
+      VideoGenerationRequest::ArtcraftMinimaxH3(request) => Ok(ArtcraftMinimaxH3CostState::from_request(request).estimate_cost()),
       VideoGenerationRequest::ArtcraftPreviewModel(request) => Ok(ArtcraftPreviewModelCostState::from_request(request).estimate_cost()),
       VideoGenerationRequest::ArtcraftPreviewModelFast(request) => Ok(ArtcraftPreviewModelFastCostState::from_request(request).estimate_cost()),
       VideoGenerationRequest::ArtcraftSeedance10Lite(request) => Ok(ArtcraftSeedance10LiteCostState::from_request(request).estimate_cost()),
@@ -316,7 +343,10 @@ impl VideoGenerationRequest {
       VideoGenerationRequest::FalKling2p5TurboPro(request) => Ok(FalKling2p5TurboProCostState::from_request(request).estimate_cost()),
       VideoGenerationRequest::FalKling2p6Pro(request) => Ok(FalKling2p6ProCostState::from_request(request).estimate_cost()),
       VideoGenerationRequest::FalKling3p0Pro(request) => Ok(FalKling3p0ProCostState::from_request(request).estimate_cost()),
+      VideoGenerationRequest::FalFlux3(request) => Ok(FalFlux3CostState::from_request(request).estimate_cost()),
+      VideoGenerationRequest::FalFlux3Draft(request) => Ok(FalFlux3DraftCostState::from_request(request).estimate_cost()),
       VideoGenerationRequest::FalKling3p0Standard(request) => Ok(FalKling3p0StandardCostState::from_request(request).estimate_cost()),
+      VideoGenerationRequest::FalMinimaxH3(request) => Ok(FalMinimaxH3CostState::from_request(request).estimate_cost()),
       VideoGenerationRequest::FalSeedance10Lite(request) => Ok(FalSeedance10LiteCostState::from_request(request).estimate_cost()),
       VideoGenerationRequest::FalSeedance1p5Pro(request) => Ok(FalSeedance1p5ProCostState::from_request(request).estimate_cost()),
       VideoGenerationRequest::FalSora2(request) => Ok(FalSora2CostState::from_request(request).estimate_cost()),
@@ -385,6 +415,18 @@ impl VideoGenerationRequest {
         let client_ref = client.get_artcraft_client_ref()?;
         request.send(client_ref).await
       },
+      VideoGenerationRequest::ArtcraftMinimaxH3(request) => {
+        let client_ref = client.get_artcraft_client_ref()?;
+        request.send(client_ref).await
+      },
+      VideoGenerationRequest::ArtcraftFlux3(request) => {
+        let client_ref = client.get_artcraft_client_ref()?;
+        request.send(client_ref).await
+      },
+      VideoGenerationRequest::ArtcraftFlux3Draft(request) => {
+        let client_ref = client.get_artcraft_client_ref()?;
+        request.send(client_ref).await
+      },
       VideoGenerationRequest::ArtcraftPreviewModel(request) => {
         let client_ref = client.get_artcraft_client_ref()?;
         request.send(client_ref).await
@@ -517,6 +559,18 @@ impl VideoGenerationRequest {
         let client_ref = client.get_fal_client_ref()?;
         request.send(client_ref).await
       },
+      VideoGenerationRequest::FalMinimaxH3(request) => {
+        let client_ref = client.get_fal_client_ref()?;
+        request.send(client_ref).await
+      },
+      VideoGenerationRequest::FalFlux3(request) => {
+        let client_ref = client.get_fal_client_ref()?;
+        request.send(client_ref).await
+      },
+      VideoGenerationRequest::FalFlux3Draft(request) => {
+        let client_ref = client.get_fal_client_ref()?;
+        request.send(client_ref).await
+      },
       VideoGenerationRequest::FalSeedance10Lite(request) => {
         let client_ref = client.get_fal_client_ref()?;
         request.send(client_ref).await

crates/api_clients/fal_client/src/requests/api/video/enhance/flux_3_draft_enhance/api.rs

@@ -0,0 +1,105 @@
+use crate::error::fal_error_plus::FalErrorPlus;
+use crate::requests::api::video::enhance::flux_3_draft_enhance::raw_request::{
+  Flux3DraftEnhanceInput, Flux3DraftEnhanceOutput,
+};
+use crate::requests::traits::fal_endpoint_trait::FalEndpoint;
+
+/// Re-render a Flux 3 Draft generation at full quality (1080p, with
+/// synchronized audio) from its `draft_cache` bundle.
+#[derive(Clone, Debug)]
+pub struct Flux3DraftEnhanceRequest {
+  /// URL of the `draft_cache` bundle returned by a Flux 3 Draft generation.
+  pub draft_cache_url: String,
+
+  /// Safety tolerance, 0 (strictest) to 4 (most permissive). fal's default is
+  /// `2` when `None`.
+  pub safety_tolerance: Option<u8>,
+
+  /// Duration of the draft being enhanced, in seconds. NOT sent to fal — the
+  /// cache bundle already fixes the duration — but used by the cost
+  /// calculator, which otherwise cannot know the billable length. Estimated
+  /// at 5 seconds (the shortest draft) when `None`.
+  pub expected_duration_seconds: Option<u8>,
+}
+
+impl FalEndpoint for Flux3DraftEnhanceRequest {
+  const ENDPOINT: &str = "blackforestlabs/flux-3/draft-enhance";
+
+  type RawRequest = Flux3DraftEnhanceInput;
+  type RawResponse = Flux3DraftEnhanceOutput;
+
+  fn to_raw_request(&self) -> Result<Self::RawRequest, FalErrorPlus> {
+    Ok(Self::RawRequest {
+      draft_cache_url: self.draft_cache_url.clone(),
+      safety_tolerance: self.safety_tolerance,
+    })
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+  use crate::creds::fal_api_key::FalApiKey;
+  use crate::requests::traits::fal_endpoint_trait::FalEndpoint;
+  use errors::AnyhowResult;
+  use std::fs::read_to_string;
+
+  // ── Real requests (manually run; require a live key and cost money) ──
+
+  #[tokio::test]
+  #[ignore] // manually run — needs a fresh draft_cache URL from a prior draft run, and incurs cost
+  async fn test_draft_enhance_queue() -> AnyhowResult<()> {
+    let secret = read_to_string("/Users/bt/Artcraft/credentials/fal_api_key.txt")?;
+    let api_key = FalApiKey::from_str(&secret);
+
+    // Paste a `draft_cache` URL from a recent Flux 3 Draft generation here.
+    let draft_cache_url = read_to_string("/tmp/flux3_draft_cache_url.txt")?;
+
+    let request = Flux3DraftEnhanceRequest {
+      draft_cache_url: draft_cache_url.trim().to_string(),
+      safety_tolerance: None,
+      expected_duration_seconds: Some(5),
+    };
+
+    let result = request.send_queue_request(&api_key).await?;
+    println!("Queue result — request_id: {}", result.request_id);
+    assert!(!result.request_id.is_empty());
+    Ok(())
+  }
+
+  // ── Wire-shape sanity (no API calls) ──
+
+  #[test]
+  fn raw_request_maps_all_fields() {
+    let request = Flux3DraftEnhanceRequest {
+      draft_cache_url: "https://example.com/cache.bin".to_string(),
+      safety_tolerance: Some(3),
+      expected_duration_seconds: Some(10),
+    };
+    let raw = request.to_raw_request().unwrap();
+    assert_eq!(raw.draft_cache_url, "https://example.com/cache.bin");
+    assert_eq!(raw.safety_tolerance, Some(3));
+  }
+
+  /// `expected_duration_seconds` is cost-calculator metadata and must never
+  /// reach the wire.
+  #[test]
+  fn expected_duration_is_not_serialized() {
+    let request = Flux3DraftEnhanceRequest {
+      draft_cache_url: "https://example.com/cache.bin".to_string(),
+      safety_tolerance: None,
+      expected_duration_seconds: Some(20),
+    };
+    let json = serde_json::to_value(request.to_raw_request().unwrap()).unwrap();
+    assert_eq!(json, serde_json::json!({
+      "draft_cache_url": "https://example.com/cache.bin",
+    }));
+  }
+
+  #[test]
+  fn endpoint_path_is_canonical() {
+    assert_eq!(Flux3DraftEnhanceRequest::ENDPOINT, "blackforestlabs/flux-3/draft-enhance");
+  }
+
+  // NB: Pricing tests are in cost.rs
+}

crates/api_clients/fal_client/src/requests/api/video/enhance/flux_3_draft_enhance/cost.rs

@@ -0,0 +1,62 @@
+use crate::requests::api::video::enhance::flux_3_draft_enhance::api::Flux3DraftEnhanceRequest;
+use crate::requests::api::video::text::flux_3::cost::flux_3_video_cost_cents;
+use crate::requests::traits::fal_request_cost_calculator_trait::{FalRequestCostCalculator, UsdCents};
+
+// Flux 3 draft-enhance pricing (see
+// https://fal.ai/models/blackforestlabs/flux-3/draft-enhance):
+//   $0.29 per second of the enhanced video (full-quality 1080p render);
+//   synchronized audio is included at no extra cost.
+//
+// The request carries only a `draft_cache_url`, so the billable duration is
+// taken from the request's `expected_duration_seconds` hint (5s — the
+// shortest draft — when unset).
+const ENHANCE_RATE_CENTS_PER_SEC: u64 = 29; // $0.29/sec
+
+impl FalRequestCostCalculator for Flux3DraftEnhanceRequest {
+  fn calculate_cost_in_cents(&self) -> UsdCents {
+    let duration_secs = u64::from(self.expected_duration_seconds.unwrap_or(5));
+    flux_3_video_cost_cents(ENHANCE_RATE_CENTS_PER_SEC, duration_secs)
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+
+  fn make_request(expected_duration_seconds: Option<u8>) -> Flux3DraftEnhanceRequest {
+    Flux3DraftEnhanceRequest {
+      draft_cache_url: "https://example.com/cache.bin".to_string(),
+      safety_tolerance: None,
+      expected_duration_seconds,
+    }
+  }
+
+  mod cost_table {
+    use super::*;
+
+    // (expected_duration, expected_cents) — 29¢ × secs; None estimates at 5s.
+    const COST_TABLE: &[(Option<u8>, u64)] = &[
+      (Some(5),  145),
+      (Some(10), 290),
+      (Some(20), 580),
+      (None, 145),
+    ];
+
+    #[test]
+    fn matches_cost_table() {
+      for &(duration, expected) in COST_TABLE {
+        let got = make_request(duration).calculate_cost_in_cents();
+        assert_eq!(got, expected, "duration={duration:?}");
+      }
+    }
+
+    /// Enhance matches the full-quality 1080p generation rate — drafting then
+    /// enhancing ($0.06 + $0.29) intentionally costs more than generating at
+    /// full quality directly ($0.29 at 1080p).
+    #[test]
+    fn enhance_rate_matches_full_quality_1080p_rate() {
+      use crate::requests::api::video::text::flux_3::cost::flux_3_standard_rate_cents_per_sec;
+      assert_eq!(ENHANCE_RATE_CENTS_PER_SEC, flux_3_standard_rate_cents_per_sec(true));
+    }
+  }
+}

crates/api_clients/fal_client/src/requests/api/video/enhance/flux_3_draft_enhance/mod.rs

@@ -0,0 +1,3 @@
+pub mod api;
+pub mod cost;
+pub mod raw_request;

crates/api_clients/fal_client/src/requests/api/video/enhance/flux_3_draft_enhance/raw_request.rs

@@ -0,0 +1,23 @@
+use serde::{Deserialize, Serialize};
+
+/// Over-the-wire input shape for `blackforestlabs/flux-3/draft-enhance`.
+/// fal's schema: <https://fal.ai/models/blackforestlabs/flux-3/draft-enhance/api>
+#[derive(Debug, Serialize, Deserialize, Default)]
+pub struct Flux3DraftEnhanceInput {
+  /// URL of the `draft_cache` bundle returned by a Flux 3 Draft generation.
+  pub draft_cache_url: String,
+
+  /// Safety tolerance, 0 (strictest) to 4 (most permissive). fal default: 2.
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub safety_tolerance: Option<u8>,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Flux3DraftEnhanceVideoFile {
+  pub url: String,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Flux3DraftEnhanceOutput {
+  pub video: Flux3DraftEnhanceVideoFile,
+}

crates/api_clients/fal_client/src/requests/api/video/enhance/mod.rs

@@ -0,0 +1 @@
+pub mod flux_3_draft_enhance;

crates/api_clients/fal_client/src/requests/api/video/extend/flux_3/api.rs

@@ -0,0 +1,133 @@
+use crate::error::fal_error_plus::FalErrorPlus;
+use crate::requests::api::video::extend::flux_3::raw_request::{
+  Flux3ExtendVideoInput, Flux3ExtendVideoOutput,
+};
+use crate::requests::api::video::text::flux_3::api::{
+  Flux3AspectRatio, Flux3Duration, Flux3Resolution,
+};
+use crate::requests::traits::fal_endpoint_trait::FalEndpoint;
+
+#[derive(Clone, Debug)]
+pub struct Flux3ExtendVideoRequest {
+  /// Text prompt describing how the video should continue.
+  pub prompt: String,
+
+  /// URL of the video to extend.
+  pub video_url: String,
+
+  /// Duration of the extension in seconds. fal's default is `auto` when
+  /// `None`.
+  pub duration: Option<Flux3Duration>,
+
+  /// Output resolution. fal's default is `720p` when `None`.
+  pub resolution: Option<Flux3Resolution>,
+
+  /// Aspect ratio. fal's default is `auto` when `None`.
+  pub aspect_ratio: Option<Flux3AspectRatio>,
+
+  /// Whether to generate synchronized audio. fal's default is `true` when
+  /// `None`. Audio does not affect the bill.
+  pub generate_audio: Option<bool>,
+
+  /// Safety tolerance, 0 (strictest) to 4 (most permissive). fal's default is
+  /// `2` when `None`.
+  pub safety_tolerance: Option<u8>,
+}
+
+impl FalEndpoint for Flux3ExtendVideoRequest {
+  const ENDPOINT: &str = "blackforestlabs/flux-3/extend-video";
+
+  type RawRequest = Flux3ExtendVideoInput;
+  type RawResponse = Flux3ExtendVideoOutput;
+
+  fn to_raw_request(&self) -> Result<Self::RawRequest, FalErrorPlus> {
+    Ok(Self::RawRequest {
+      prompt: self.prompt.clone(),
+      video_url: self.video_url.clone(),
+      duration: self.duration,
+      resolution: self.resolution.map(|r| r.to_str().to_string()),
+      aspect_ratio: self.aspect_ratio.map(|ar| ar.to_str().to_string()),
+      generate_audio: self.generate_audio,
+      safety_tolerance: self.safety_tolerance,
+    })
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+  use crate::creds::fal_api_key::FalApiKey;
+  use crate::requests::traits::fal_endpoint_trait::FalEndpoint;
+  use errors::AnyhowResult;
+  use std::fs::read_to_string;
+
+  // ── Real requests (manually run; require a live key and cost money) ──
+
+  #[tokio::test]
+  #[ignore] // manually run — fires a real API request and incurs cost
+  async fn test_extend_video_queue() -> AnyhowResult<()> {
+    let secret = read_to_string("/Users/bt/Artcraft/credentials/fal_api_key.txt")?;
+    let api_key = FalApiKey::from_str(&secret);
+
+    let request = Flux3ExtendVideoRequest {
+      prompt: "the camera keeps drifting forward as the scene continues".to_string(),
+      video_url: "https://storage.googleapis.com/falserverless/example_inputs/hunyuan_video_input.mp4".to_string(),
+      duration: Some(Flux3Duration::Seconds(5)),
+      resolution: Some(Flux3Resolution::SevenTwentyP),
+      aspect_ratio: None,
+      generate_audio: Some(false),
+      safety_tolerance: None,
+    };
+
+    let result = request.send_queue_request(&api_key).await?;
+    println!("Queue result — request_id: {}", result.request_id);
+    assert!(!result.request_id.is_empty());
+    Ok(())
+  }
+
+  // ── Wire-shape sanity (no API calls) ──
+
+  #[test]
+  fn raw_request_maps_all_fields() {
+    let request = Flux3ExtendVideoRequest {
+      prompt: "p".to_string(),
+      video_url: "https://example.com/source.mp4".to_string(),
+      duration: Some(Flux3Duration::Seconds(10)),
+      resolution: Some(Flux3Resolution::TenEightyP),
+      aspect_ratio: Some(Flux3AspectRatio::SixteenByNine),
+      generate_audio: Some(true),
+      safety_tolerance: Some(2),
+    };
+    let raw = request.to_raw_request().unwrap();
+    assert_eq!(raw.prompt, "p");
+    assert_eq!(raw.video_url, "https://example.com/source.mp4");
+    assert_eq!(raw.duration, Some(Flux3Duration::Seconds(10)));
+    assert_eq!(raw.resolution.as_deref(), Some("1080p"));
+    assert_eq!(raw.aspect_ratio.as_deref(), Some("16:9"));
+  }
+
+  #[test]
+  fn raw_request_omits_unset_optionals() {
+    let request = Flux3ExtendVideoRequest {
+      prompt: "minimal".to_string(),
+      video_url: "https://example.com/source.mp4".to_string(),
+      duration: None,
+      resolution: None,
+      aspect_ratio: None,
+      generate_audio: None,
+      safety_tolerance: None,
+    };
+    let json = serde_json::to_value(request.to_raw_request().unwrap()).unwrap();
+    assert_eq!(json, serde_json::json!({
+      "prompt": "minimal",
+      "video_url": "https://example.com/source.mp4",
+    }));
+  }
+
+  #[test]
+  fn endpoint_path_is_canonical() {
+    assert_eq!(Flux3ExtendVideoRequest::ENDPOINT, "blackforestlabs/flux-3/extend-video");
+  }
+
+  // NB: Pricing tests are in cost.rs
+}

crates/api_clients/fal_client/src/requests/api/video/extend/flux_3/cost.rs

@@ -0,0 +1,80 @@
+use crate::requests::api::video::extend::flux_3::api::Flux3ExtendVideoRequest;
+use crate::requests::api::video::text::flux_3::cost::{
+  flux_3_estimated_duration_secs, flux_3_is_1080p, flux_3_video_cost_cents,
+};
+use crate::requests::traits::fal_request_cost_calculator_trait::{FalRequestCostCalculator, UsdCents};
+
+// Flux 3 extend-video pricing (see https://fal.ai/models/blackforestlabs/flux-3/extend-video):
+//   720p:  $0.41 per second of generated video
+//   1080p: $0.53 per second of generated video
+//
+// Extend bills higher than the other Flux 3 modalities (which are $0.17 and
+// $0.29; see the text module). The source video is free; pricing depends on
+// resolution and the generated extension's duration only.
+const EXTEND_RATE_720P_CENTS_PER_SEC: u64 = 41; // $0.41/sec
+const EXTEND_RATE_1080P_CENTS_PER_SEC: u64 = 53; // $0.53/sec
+
+impl FalRequestCostCalculator for Flux3ExtendVideoRequest {
+  fn calculate_cost_in_cents(&self) -> UsdCents {
+    let duration_secs = flux_3_estimated_duration_secs(self.duration);
+    let rate = if flux_3_is_1080p(self.resolution) {
+      EXTEND_RATE_1080P_CENTS_PER_SEC
+    } else {
+      EXTEND_RATE_720P_CENTS_PER_SEC
+    };
+    flux_3_video_cost_cents(rate, duration_secs)
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+  use crate::requests::api::video::text::flux_3::api::{Flux3Duration, Flux3Resolution};
+
+  fn make_request(
+    duration: Option<Flux3Duration>,
+    resolution: Option<Flux3Resolution>,
+  ) -> Flux3ExtendVideoRequest {
+    Flux3ExtendVideoRequest {
+      prompt: "test".to_string(),
+      video_url: "https://example.com/source.mp4".to_string(),
+      duration,
+      resolution,
+      aspect_ratio: None,
+      generate_audio: None,
+      safety_tolerance: None,
+    }
+  }
+
+  mod cost_table {
+    use super::*;
+
+    // (duration, resolution, expected_cents)
+    // Math: rate × secs where rate (cents) = 41 (720p) or 53 (1080p);
+    // None/auto durations are estimated at the 5s floor.
+    const COST_TABLE: &[(Option<Flux3Duration>, Option<Flux3Resolution>, u64)] = &[
+      (Some(Flux3Duration::Seconds(5)),  Some(Flux3Resolution::SevenTwentyP), 205),
+      (Some(Flux3Duration::Seconds(20)), Some(Flux3Resolution::SevenTwentyP), 820),
+      (Some(Flux3Duration::Seconds(5)),  Some(Flux3Resolution::TenEightyP), 265),
+      (Some(Flux3Duration::Seconds(20)), Some(Flux3Resolution::TenEightyP), 1060),
+      // Defaults: duration=None/auto→5s estimate, resolution=None→720p
+      (None, None, 205),
+      (Some(Flux3Duration::Auto), None, 205),
+    ];
+
+    #[test]
+    fn matches_cost_table() {
+      for &(duration, resolution, expected) in COST_TABLE {
+        let got = make_request(duration, resolution).calculate_cost_in_cents();
+        assert_eq!(got, expected, "duration={duration:?} resolution={resolution:?}");
+      }
+    }
+
+    #[test]
+    fn extend_is_more_expensive_than_standard_generation() {
+      use crate::requests::api::video::text::flux_3::cost::flux_3_standard_rate_cents_per_sec;
+      assert!(EXTEND_RATE_720P_CENTS_PER_SEC > flux_3_standard_rate_cents_per_sec(false));
+      assert!(EXTEND_RATE_1080P_CENTS_PER_SEC > flux_3_standard_rate_cents_per_sec(true));
+    }
+  }
+}

crates/api_clients/fal_client/src/requests/api/video/extend/flux_3/mod.rs

@@ -0,0 +1,3 @@
+pub mod api;
+pub mod cost;
+pub mod raw_request;

crates/api_clients/fal_client/src/requests/api/video/extend/flux_3/raw_request.rs

@@ -0,0 +1,48 @@
+use serde::{Deserialize, Serialize};
+
+use crate::requests::api::video::text::flux_3::api::Flux3Duration;
+
+/// Over-the-wire input shape for `blackforestlabs/flux-3/extend-video`.
+/// fal's schema: <https://fal.ai/models/blackforestlabs/flux-3/extend-video/api>
+#[derive(Debug, Serialize, Deserialize, Default)]
+pub struct Flux3ExtendVideoInput {
+  /// Text prompt describing how the video should continue.
+  pub prompt: String,
+
+  /// URL of the video to extend.
+  pub video_url: String,
+
+  /// Duration of the extension in seconds ("auto" or 5–20). fal default:
+  /// "auto".
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub duration: Option<Flux3Duration>,
+
+  /// Output resolution.
+  /// Possible values: "720p", "1080p". fal default: "720p".
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub resolution: Option<String>,
+
+  /// Aspect ratio.
+  /// Possible values: "auto", "21:9", "2:1", "16:9", "4:3", "1:1", "3:4",
+  /// "9:16". fal default: "auto".
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub aspect_ratio: Option<String>,
+
+  /// Whether to generate synchronized audio. fal default: true.
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub generate_audio: Option<bool>,
+
+  /// Safety tolerance, 0 (strictest) to 4 (most permissive). fal default: 2.
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub safety_tolerance: Option<u8>,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Flux3ExtendVideoVideoFile {
+  pub url: String,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Flux3ExtendVideoOutput {
+  pub video: Flux3ExtendVideoVideoFile,
+}

crates/api_clients/fal_client/src/requests/api/video/extend/flux_3_draft/api.rs

@@ -0,0 +1,128 @@
+use crate::error::fal_error_plus::FalErrorPlus;
+use crate::requests::api::video::extend::flux_3_draft::raw_request::{
+  Flux3DraftExtendVideoInput, Flux3DraftExtendVideoOutput,
+};
+use crate::requests::api::video::text::flux_3::api::{Flux3AspectRatio, Flux3Duration};
+use crate::requests::traits::fal_endpoint_trait::FalEndpoint;
+
+/// Flux 3 Draft extend-video: lower cost, lower fidelity (always 720p). The
+/// response includes a `draft_cache` that `draft-enhance` can upgrade to a
+/// full-quality 1080p render.
+#[derive(Clone, Debug)]
+pub struct Flux3DraftExtendVideoRequest {
+  /// Text prompt describing how the video should continue.
+  pub prompt: String,
+
+  /// URL of the video to extend.
+  pub video_url: String,
+
+  /// Duration of the extension in seconds. fal's default is `auto` when
+  /// `None`.
+  pub duration: Option<Flux3Duration>,
+
+  /// Aspect ratio. fal's default is `auto` when `None`.
+  pub aspect_ratio: Option<Flux3AspectRatio>,
+
+  /// Whether to generate synchronized audio. fal's default is `true` when
+  /// `None`. Audio does not affect the bill.
+  pub generate_audio: Option<bool>,
+
+  /// Safety tolerance, 0 (strictest) to 4 (most permissive). fal's default is
+  /// `2` when `None`.
+  pub safety_tolerance: Option<u8>,
+}
+
+impl FalEndpoint for Flux3DraftExtendVideoRequest {
+  const ENDPOINT: &str = "blackforestlabs/flux-3/extend-video/draft";
+
+  type RawRequest = Flux3DraftExtendVideoInput;
+  type RawResponse = Flux3DraftExtendVideoOutput;
+
+  fn to_raw_request(&self) -> Result<Self::RawRequest, FalErrorPlus> {
+    Ok(Self::RawRequest {
+      prompt: self.prompt.clone(),
+      video_url: self.video_url.clone(),
+      duration: self.duration,
+      aspect_ratio: self.aspect_ratio.map(|ar| ar.to_str().to_string()),
+      generate_audio: self.generate_audio,
+      safety_tolerance: self.safety_tolerance,
+    })
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+  use crate::creds::fal_api_key::FalApiKey;
+  use crate::requests::traits::fal_endpoint_trait::FalEndpoint;
+  use errors::AnyhowResult;
+  use std::fs::read_to_string;
+
+  // ── Real requests (manually run; require a live key and cost money) ──
+
+  #[tokio::test]
+  #[ignore] // manually run — fires a real API request and incurs cost
+  async fn test_extend_video_queue() -> AnyhowResult<()> {
+    let secret = read_to_string("/Users/bt/Artcraft/credentials/fal_api_key.txt")?;
+    let api_key = FalApiKey::from_str(&secret);
+
+    let request = Flux3DraftExtendVideoRequest {
+      prompt: "the camera keeps drifting forward as the scene continues".to_string(),
+      video_url: "https://storage.googleapis.com/falserverless/example_inputs/hunyuan_video_input.mp4".to_string(),
+      duration: Some(Flux3Duration::Seconds(5)),
+      aspect_ratio: None,
+      generate_audio: Some(false),
+      safety_tolerance: None,
+    };
+
+    let result = request.send_queue_request(&api_key).await?;
+    println!("Queue result — request_id: {}", result.request_id);
+    assert!(!result.request_id.is_empty());
+    Ok(())
+  }
+
+  // ── Wire-shape sanity (no API calls) ──
+
+  #[test]
+  fn raw_request_maps_all_fields() {
+    let request = Flux3DraftExtendVideoRequest {
+      prompt: "p".to_string(),
+      video_url: "https://example.com/source.mp4".to_string(),
+      duration: Some(Flux3Duration::Auto),
+      aspect_ratio: Some(Flux3AspectRatio::Auto),
+      generate_audio: Some(true),
+      safety_tolerance: Some(4),
+    };
+    let raw = request.to_raw_request().unwrap();
+    assert_eq!(raw.prompt, "p");
+    assert_eq!(raw.video_url, "https://example.com/source.mp4");
+    assert_eq!(raw.duration, Some(Flux3Duration::Auto));
+    assert_eq!(raw.aspect_ratio.as_deref(), Some("auto"));
+    assert_eq!(raw.generate_audio, Some(true));
+    assert_eq!(raw.safety_tolerance, Some(4));
+  }
+
+  #[test]
+  fn raw_request_omits_unset_optionals() {
+    let request = Flux3DraftExtendVideoRequest {
+      prompt: "minimal".to_string(),
+      video_url: "https://example.com/source.mp4".to_string(),
+      duration: None,
+      aspect_ratio: None,
+      generate_audio: None,
+      safety_tolerance: None,
+    };
+    let json = serde_json::to_value(request.to_raw_request().unwrap()).unwrap();
+    assert_eq!(json, serde_json::json!({
+      "prompt": "minimal",
+      "video_url": "https://example.com/source.mp4",
+    }));
+  }
+
+  #[test]
+  fn endpoint_path_is_canonical() {
+    assert_eq!(Flux3DraftExtendVideoRequest::ENDPOINT, "blackforestlabs/flux-3/extend-video/draft");
+  }
+
+  // NB: Pricing tests are in cost.rs
+}

crates/api_clients/fal_client/src/requests/api/video/extend/flux_3_draft/cost.rs

@@ -0,0 +1,64 @@
+use crate::requests::api::video::extend::flux_3_draft::api::Flux3DraftExtendVideoRequest;
+use crate::requests::api::video::text::flux_3::cost::{
+  flux_3_estimated_duration_secs, flux_3_video_cost_cents,
+};
+use crate::requests::traits::fal_request_cost_calculator_trait::{FalRequestCostCalculator, UsdCents};
+
+// Flux 3 Draft extend-video pricing (see
+// https://fal.ai/models/blackforestlabs/flux-3/extend-video/draft):
+//   $0.12 per second of generated draft video (always 720p)
+//
+// Draft extend bills higher than the other draft modalities ($0.06/sec; see
+// the draft text module). The source video is free; pricing depends on the
+// generated extension's duration only.
+const DRAFT_EXTEND_RATE_CENTS_PER_SEC: u64 = 12; // $0.12/sec
+
+impl FalRequestCostCalculator for Flux3DraftExtendVideoRequest {
+  fn calculate_cost_in_cents(&self) -> UsdCents {
+    let duration_secs = flux_3_estimated_duration_secs(self.duration);
+    flux_3_video_cost_cents(DRAFT_EXTEND_RATE_CENTS_PER_SEC, duration_secs)
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+  use crate::requests::api::video::text::flux_3::api::Flux3Duration;
+
+  fn make_request(duration: Option<Flux3Duration>) -> Flux3DraftExtendVideoRequest {
+    Flux3DraftExtendVideoRequest {
+      prompt: "test".to_string(),
+      video_url: "https://example.com/source.mp4".to_string(),
+      duration,
+      aspect_ratio: None,
+      generate_audio: None,
+      safety_tolerance: None,
+    }
+  }
+
+  mod cost_table {
+    use super::*;
+
+    // (duration, expected_cents) — 12¢ × secs; None/auto estimate at 5s.
+    const COST_TABLE: &[(Option<Flux3Duration>, u64)] = &[
+      (Some(Flux3Duration::Seconds(5)),  60),
+      (Some(Flux3Duration::Seconds(20)), 240),
+      (None, 60),
+      (Some(Flux3Duration::Auto), 60),
+    ];
+
+    #[test]
+    fn matches_cost_table() {
+      for &(duration, expected) in COST_TABLE {
+        let got = make_request(duration).calculate_cost_in_cents();
+        assert_eq!(got, expected, "duration={duration:?}");
+      }
+    }
+
+    #[test]
+    fn draft_extend_is_double_the_draft_generation_rate() {
+      use crate::requests::api::video::text::flux_3_draft::cost::flux_3_draft_generation_rate_cents_per_sec;
+      assert_eq!(DRAFT_EXTEND_RATE_CENTS_PER_SEC, flux_3_draft_generation_rate_cents_per_sec() * 2);
+    }
+  }
+}

crates/api_clients/fal_client/src/requests/api/video/extend/flux_3_draft/mod.rs

@@ -0,0 +1,3 @@
+pub mod api;
+pub mod cost;
+pub mod raw_request;

crates/api_clients/fal_client/src/requests/api/video/extend/flux_3_draft/raw_request.rs

@@ -0,0 +1,47 @@
+use serde::{Deserialize, Serialize};
+
+use crate::requests::api::video::text::flux_3::api::Flux3Duration;
+
+/// Over-the-wire input shape for `blackforestlabs/flux-3/extend-video/draft`.
+/// fal's schema: <https://fal.ai/models/blackforestlabs/flux-3/extend-video/draft/api>
+#[derive(Debug, Serialize, Deserialize, Default)]
+pub struct Flux3DraftExtendVideoInput {
+  /// Text prompt describing how the video should continue.
+  pub prompt: String,
+
+  /// URL of the video to extend.
+  pub video_url: String,
+
+  /// Duration of the extension in seconds ("auto" or 5–20). fal default:
+  /// "auto".
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub duration: Option<Flux3Duration>,
+
+  /// Aspect ratio.
+  /// Possible values: "auto", "21:9", "2:1", "16:9", "4:3", "1:1", "3:4",
+  /// "9:16". fal default: "auto".
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub aspect_ratio: Option<String>,
+
+  /// Whether to generate synchronized audio. fal default: true.
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub generate_audio: Option<bool>,
+
+  /// Safety tolerance, 0 (strictest) to 4 (most permissive). fal default: 2.
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub safety_tolerance: Option<u8>,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Flux3DraftExtendVideoVideoFile {
+  pub url: String,
+}
+
+/// Draft outputs carry the 720p draft video plus a durable encrypted cache
+/// bundle whose URL can be passed to `draft-enhance` for a full-quality
+/// 1080p render.
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Flux3DraftExtendVideoOutput {
+  pub video: Flux3DraftExtendVideoVideoFile,
+  pub draft_cache: Flux3DraftExtendVideoVideoFile,
+}

crates/api_clients/fal_client/src/requests/api/video/extend/mod.rs

@@ -1,2 +1,4 @@
+pub mod flux_3;
+pub mod flux_3_draft;
 pub mod veo_3p1;
 pub mod veo_3p1_fast;

crates/api_clients/fal_client/src/requests/api/video/image/flux_3/api.rs

@@ -0,0 +1,159 @@
+use crate::error::fal_error_plus::FalErrorPlus;
+use crate::requests::api::video::image::flux_3::raw_request::{
+  Flux3ImageToVideoInput, Flux3ImageToVideoOutput,
+};
+use crate::requests::api::video::text::flux_3::api::{
+  Flux3AspectRatio, Flux3Duration, Flux3Resolution,
+};
+use crate::requests::traits::fal_endpoint_trait::FalEndpoint;
+
+#[derive(Clone, Debug)]
+pub struct Flux3ImageToVideoRequest {
+  /// Text prompt for video generation.
+  pub prompt: String,
+
+  /// URL of the image to animate.
+  pub image_url: String,
+
+  /// Duration in seconds. fal's default is `auto` when `None`.
+  pub duration: Option<Flux3Duration>,
+
+  /// Output resolution. fal's default is `720p` when `None`.
+  pub resolution: Option<Flux3Resolution>,
+
+  /// Aspect ratio. fal's default is `auto` when `None`.
+  pub aspect_ratio: Option<Flux3AspectRatio>,
+
+  /// Whether to generate synchronized audio. fal's default is `true` when
+  /// `None`. Audio does not affect the bill.
+  pub generate_audio: Option<bool>,
+
+  /// Safety tolerance, 0 (strictest) to 4 (most permissive). fal's default is
+  /// `2` when `None`.
+  pub safety_tolerance: Option<u8>,
+}
+
+impl FalEndpoint for Flux3ImageToVideoRequest {
+  const ENDPOINT: &str = "blackforestlabs/flux-3/image-to-video";
+
+  type RawRequest = Flux3ImageToVideoInput;
+  type RawResponse = Flux3ImageToVideoOutput;
+
+  fn to_raw_request(&self) -> Result<Self::RawRequest, FalErrorPlus> {
+    Ok(Self::RawRequest {
+      prompt: self.prompt.clone(),
+      image_url: self.image_url.clone(),
+      duration: self.duration,
+      resolution: self.resolution.map(|r| r.to_str().to_string()),
+      aspect_ratio: self.aspect_ratio.map(|ar| ar.to_str().to_string()),
+      generate_audio: self.generate_audio,
+      safety_tolerance: self.safety_tolerance,
+    })
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+  use crate::creds::fal_api_key::FalApiKey;
+  use crate::requests::traits::fal_endpoint_trait::FalEndpoint;
+  use errors::AnyhowResult;
+  use std::fs::read_to_string;
+
+  const EXAMPLE_IMAGE_URL: &str =
+    "https://storage.googleapis.com/falserverless/example_inputs/veo31-flf2v-input-1.jpeg";
+
+  // ── Real requests (manually run; require a live key and cost money) ──
+
+  #[tokio::test]
+  #[ignore] // manually run — fires a real API request and incurs cost
+  async fn test_image_to_video_webhook() -> AnyhowResult<()> {
+    let secret = read_to_string("/Users/bt/Artcraft/credentials/fal_api_key.txt")?;
+    let api_key = FalApiKey::from_str(&secret);
+
+    let request = Flux3ImageToVideoRequest {
+      prompt: "the camera slowly pulls back, revealing the full landscape".to_string(),
+      image_url: EXAMPLE_IMAGE_URL.to_string(),
+      duration: Some(Flux3Duration::Seconds(5)),
+      resolution: Some(Flux3Resolution::SevenTwentyP),
+      aspect_ratio: None,
+      generate_audio: Some(false),
+      safety_tolerance: None,
+    };
+
+    let result = request.send_webhook_request(&api_key, "https://example.com/webhook").await?;
+    println!("Webhook result: {:?}", result);
+    assert!(result.request_id.is_some() || result.gateway_request_id.is_some());
+    Ok(())
+  }
+
+  #[tokio::test]
+  #[ignore] // manually run — fires a real API request and incurs cost
+  async fn test_image_to_video_queue() -> AnyhowResult<()> {
+    let secret = read_to_string("/Users/bt/Artcraft/credentials/fal_api_key.txt")?;
+    let api_key = FalApiKey::from_str(&secret);
+
+    let request = Flux3ImageToVideoRequest {
+      prompt: "gentle wind moves through the scene as clouds drift overhead".to_string(),
+      image_url: EXAMPLE_IMAGE_URL.to_string(),
+      duration: Some(Flux3Duration::Seconds(5)),
+      resolution: Some(Flux3Resolution::SevenTwentyP),
+      aspect_ratio: None,
+      generate_audio: Some(false),
+      safety_tolerance: None,
+    };
+
+    let result = request.send_queue_request(&api_key).await?;
+    println!("Queue result — request_id: {}", result.request_id);
+    assert!(!result.request_id.is_empty());
+    Ok(())
+  }
+
+  // ── Wire-shape sanity (no API calls) ──
+
+  #[test]
+  fn raw_request_maps_all_fields() {
+    let request = Flux3ImageToVideoRequest {
+      prompt: "p".to_string(),
+      image_url: "https://example.com/frame.png".to_string(),
+      duration: Some(Flux3Duration::Auto),
+      resolution: Some(Flux3Resolution::TenEightyP),
+      aspect_ratio: Some(Flux3AspectRatio::Auto),
+      generate_audio: Some(true),
+      safety_tolerance: Some(0),
+    };
+    let raw = request.to_raw_request().unwrap();
+    assert_eq!(raw.prompt, "p");
+    assert_eq!(raw.image_url, "https://example.com/frame.png");
+    assert_eq!(raw.duration, Some(Flux3Duration::Auto));
+    assert_eq!(raw.resolution.as_deref(), Some("1080p"));
+    assert_eq!(raw.aspect_ratio.as_deref(), Some("auto"));
+    assert_eq!(raw.generate_audio, Some(true));
+    assert_eq!(raw.safety_tolerance, Some(0));
+  }
+
+  #[test]
+  fn raw_request_omits_unset_optionals() {
+    let request = Flux3ImageToVideoRequest {
+      prompt: "minimal".to_string(),
+      image_url: "https://example.com/frame.png".to_string(),
+      duration: None,
+      resolution: None,
+      aspect_ratio: None,
+      generate_audio: None,
+      safety_tolerance: None,
+    };
+    let json = serde_json::to_value(request.to_raw_request().unwrap()).unwrap();
+    assert_eq!(json, serde_json::json!({
+      "prompt": "minimal",
+      "image_url": "https://example.com/frame.png",
+    }));
+  }
+
+  #[test]
+  fn endpoint_path_is_canonical() {
+    assert_eq!(Flux3ImageToVideoRequest::ENDPOINT, "blackforestlabs/flux-3/image-to-video");
+  }
+
+  // NB: Pricing tests are in cost.rs
+}

crates/api_clients/fal_client/src/requests/api/video/image/flux_3/cost.rs

@@ -0,0 +1,64 @@
+use crate::requests::api::video::image::flux_3::api::Flux3ImageToVideoRequest;
+use crate::requests::api::video::text::flux_3::cost::{
+  flux_3_estimated_duration_secs, flux_3_is_1080p, flux_3_standard_rate_cents_per_sec,
+  flux_3_video_cost_cents,
+};
+use crate::requests::traits::fal_request_cost_calculator_trait::{FalRequestCostCalculator, UsdCents};
+
+// Image-to-video shares the standard Flux 3 per-second pricing (see the text
+// module for the canonical rate table):
+//   720p:  $0.17/sec
+//   1080p: $0.29/sec
+// The input image is free; pricing depends on resolution and duration only.
+
+impl FalRequestCostCalculator for Flux3ImageToVideoRequest {
+  fn calculate_cost_in_cents(&self) -> UsdCents {
+    let duration_secs = flux_3_estimated_duration_secs(self.duration);
+    let rate = flux_3_standard_rate_cents_per_sec(flux_3_is_1080p(self.resolution));
+    flux_3_video_cost_cents(rate, duration_secs)
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+  use crate::requests::api::video::text::flux_3::api::{Flux3Duration, Flux3Resolution};
+
+  fn make_request(
+    duration: Option<Flux3Duration>,
+    resolution: Option<Flux3Resolution>,
+  ) -> Flux3ImageToVideoRequest {
+    Flux3ImageToVideoRequest {
+      prompt: "test".to_string(),
+      image_url: "https://example.com/frame.png".to_string(),
+      duration,
+      resolution,
+      aspect_ratio: None,
+      generate_audio: None,
+      safety_tolerance: None,
+    }
+  }
+
+  mod cost_table {
+    use super::*;
+
+    // (duration, resolution, expected_cents)
+    const COST_TABLE: &[(Option<Flux3Duration>, Option<Flux3Resolution>, u64)] = &[
+      (Some(Flux3Duration::Seconds(5)),  Some(Flux3Resolution::SevenTwentyP), 85),
+      (Some(Flux3Duration::Seconds(20)), Some(Flux3Resolution::SevenTwentyP), 340),
+      (Some(Flux3Duration::Seconds(5)),  Some(Flux3Resolution::TenEightyP), 145),
+      (Some(Flux3Duration::Seconds(20)), Some(Flux3Resolution::TenEightyP), 580),
+      // Defaults: duration=None/auto→5s estimate, resolution=None→720p
+      (None, None, 85),
+      (Some(Flux3Duration::Auto), Some(Flux3Resolution::TenEightyP), 145),
+    ];
+
+    #[test]
+    fn matches_cost_table() {
+      for &(duration, resolution, expected) in COST_TABLE {
+        let got = make_request(duration, resolution).calculate_cost_in_cents();
+        assert_eq!(got, expected, "duration={duration:?} resolution={resolution:?}");
+      }
+    }
+  }
+}

crates/api_clients/fal_client/src/requests/api/video/image/flux_3/mod.rs

@@ -0,0 +1,3 @@
+pub mod api;
+pub mod cost;
+pub mod raw_request;

crates/api_clients/fal_client/src/requests/api/video/image/flux_3/raw_request.rs

@@ -0,0 +1,47 @@
+use serde::{Deserialize, Serialize};
+
+use crate::requests::api::video::text::flux_3::api::Flux3Duration;
+
+/// Over-the-wire input shape for `blackforestlabs/flux-3/image-to-video`.
+/// fal's schema: <https://fal.ai/models/blackforestlabs/flux-3/image-to-video/api>
+#[derive(Debug, Serialize, Deserialize, Default)]
+pub struct Flux3ImageToVideoInput {
+  /// Text prompt for video generation.
+  pub prompt: String,
+
+  /// URL of the image to animate.
+  pub image_url: String,
+
+  /// Duration in seconds ("auto" or 5–20). fal default: "auto".
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub duration: Option<Flux3Duration>,
+
+  /// Output resolution.
+  /// Possible values: "720p", "1080p". fal default: "720p".
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub resolution: Option<String>,
+
+  /// Aspect ratio.
+  /// Possible values: "auto", "21:9", "2:1", "16:9", "4:3", "1:1", "3:4",
+  /// "9:16". fal default: "auto".
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub aspect_ratio: Option<String>,
+
+  /// Whether to generate synchronized audio. fal default: true.
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub generate_audio: Option<bool>,
+
+  /// Safety tolerance, 0 (strictest) to 4 (most permissive). fal default: 2.
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub safety_tolerance: Option<u8>,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Flux3ImageToVideoVideoFile {
+  pub url: String,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Flux3ImageToVideoOutput {
+  pub video: Flux3ImageToVideoVideoFile,
+}

crates/api_clients/fal_client/src/requests/api/video/image/flux_3_draft/api.rs

@@ -0,0 +1,151 @@
+use crate::error::fal_error_plus::FalErrorPlus;
+use crate::requests::api::video::image::flux_3_draft::raw_request::{
+  Flux3DraftImageToVideoInput, Flux3DraftImageToVideoOutput,
+};
+use crate::requests::api::video::text::flux_3::api::{Flux3AspectRatio, Flux3Duration};
+use crate::requests::traits::fal_endpoint_trait::FalEndpoint;
+
+/// Flux 3 Draft image-to-video: lower cost, lower fidelity (always 720p). The
+/// response includes a `draft_cache` that `draft-enhance` can upgrade to a
+/// full-quality 1080p render.
+#[derive(Clone, Debug)]
+pub struct Flux3DraftImageToVideoRequest {
+  /// Text prompt for video generation.
+  pub prompt: String,
+
+  /// URL of the image to animate.
+  pub image_url: String,
+
+  /// Duration in seconds. fal's default is `auto` when `None`.
+  pub duration: Option<Flux3Duration>,
+
+  /// Aspect ratio. fal's default is `auto` when `None`.
+  pub aspect_ratio: Option<Flux3AspectRatio>,
+
+  /// Whether to generate synchronized audio. fal's default is `true` when
+  /// `None`. Audio does not affect the bill.
+  pub generate_audio: Option<bool>,
+
+  /// Safety tolerance, 0 (strictest) to 4 (most permissive). fal's default is
+  /// `2` when `None`.
+  pub safety_tolerance: Option<u8>,
+}
+
+impl FalEndpoint for Flux3DraftImageToVideoRequest {
+  const ENDPOINT: &str = "blackforestlabs/flux-3/image-to-video/draft";
+
+  type RawRequest = Flux3DraftImageToVideoInput;
+  type RawResponse = Flux3DraftImageToVideoOutput;
+
+  fn to_raw_request(&self) -> Result<Self::RawRequest, FalErrorPlus> {
+    Ok(Self::RawRequest {
+      prompt: self.prompt.clone(),
+      image_url: self.image_url.clone(),
+      duration: self.duration,
+      aspect_ratio: self.aspect_ratio.map(|ar| ar.to_str().to_string()),
+      generate_audio: self.generate_audio,
+      safety_tolerance: self.safety_tolerance,
+    })
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+  use crate::creds::fal_api_key::FalApiKey;
+  use crate::requests::traits::fal_endpoint_trait::FalEndpoint;
+  use errors::AnyhowResult;
+  use std::fs::read_to_string;
+
+  const EXAMPLE_IMAGE_URL: &str =
+    "https://storage.googleapis.com/falserverless/example_inputs/veo31-flf2v-input-1.jpeg";
+
+  // ── Real requests (manually run; require a live key and cost money) ──
+
+  #[tokio::test]
+  #[ignore] // manually run — fires a real API request and incurs cost
+  async fn test_image_to_video_webhook() -> AnyhowResult<()> {
+    let secret = read_to_string("/Users/bt/Artcraft/credentials/fal_api_key.txt")?;
+    let api_key = FalApiKey::from_str(&secret);
+
+    let request = Flux3DraftImageToVideoRequest {
+      prompt: "the camera slowly pulls back, revealing the full landscape".to_string(),
+      image_url: EXAMPLE_IMAGE_URL.to_string(),
+      duration: Some(Flux3Duration::Seconds(5)),
+      aspect_ratio: None,
+      generate_audio: Some(false),
+      safety_tolerance: None,
+    };
+
+    let result = request.send_webhook_request(&api_key, "https://example.com/webhook").await?;
+    println!("Webhook result: {:?}", result);
+    assert!(result.request_id.is_some() || result.gateway_request_id.is_some());
+    Ok(())
+  }
+
+  #[tokio::test]
+  #[ignore] // manually run — fires a real API request and incurs cost
+  async fn test_image_to_video_queue() -> AnyhowResult<()> {
+    let secret = read_to_string("/Users/bt/Artcraft/credentials/fal_api_key.txt")?;
+    let api_key = FalApiKey::from_str(&secret);
+
+    let request = Flux3DraftImageToVideoRequest {
+      prompt: "gentle wind moves through the scene as clouds drift overhead".to_string(),
+      image_url: EXAMPLE_IMAGE_URL.to_string(),
+      duration: Some(Flux3Duration::Seconds(5)),
+      aspect_ratio: None,
+      generate_audio: Some(false),
+      safety_tolerance: None,
+    };
+
+    let result = request.send_queue_request(&api_key).await?;
+    println!("Queue result — request_id: {}", result.request_id);
+    assert!(!result.request_id.is_empty());
+    Ok(())
+  }
+
+  // ── Wire-shape sanity (no API calls) ──
+
+  #[test]
+  fn raw_request_maps_all_fields() {
+    let request = Flux3DraftImageToVideoRequest {
+      prompt: "p".to_string(),
+      image_url: "https://example.com/frame.png".to_string(),
+      duration: Some(Flux3Duration::Seconds(8)),
+      aspect_ratio: Some(Flux3AspectRatio::NineBySixteen),
+      generate_audio: Some(false),
+      safety_tolerance: Some(1),
+    };
+    let raw = request.to_raw_request().unwrap();
+    assert_eq!(raw.prompt, "p");
+    assert_eq!(raw.image_url, "https://example.com/frame.png");
+    assert_eq!(raw.duration, Some(Flux3Duration::Seconds(8)));
+    assert_eq!(raw.aspect_ratio.as_deref(), Some("9:16"));
+    assert_eq!(raw.generate_audio, Some(false));
+    assert_eq!(raw.safety_tolerance, Some(1));
+  }
+
+  #[test]
+  fn raw_request_omits_unset_optionals() {
+    let request = Flux3DraftImageToVideoRequest {
+      prompt: "minimal".to_string(),
+      image_url: "https://example.com/frame.png".to_string(),
+      duration: None,
+      aspect_ratio: None,
+      generate_audio: None,
+      safety_tolerance: None,
+    };
+    let json = serde_json::to_value(request.to_raw_request().unwrap()).unwrap();
+    assert_eq!(json, serde_json::json!({
+      "prompt": "minimal",
+      "image_url": "https://example.com/frame.png",
+    }));
+  }
+
+  #[test]
+  fn endpoint_path_is_canonical() {
+    assert_eq!(Flux3DraftImageToVideoRequest::ENDPOINT, "blackforestlabs/flux-3/image-to-video/draft");
+  }
+
+  // NB: Pricing tests are in cost.rs
+}

crates/api_clients/fal_client/src/requests/api/video/image/flux_3_draft/cost.rs

@@ -0,0 +1,54 @@
+use crate::requests::api::video::image::flux_3_draft::api::Flux3DraftImageToVideoRequest;
+use crate::requests::api::video::text::flux_3::cost::{
+  flux_3_estimated_duration_secs, flux_3_video_cost_cents,
+};
+use crate::requests::api::video::text::flux_3_draft::cost::flux_3_draft_generation_rate_cents_per_sec;
+use crate::requests::traits::fal_request_cost_calculator_trait::{FalRequestCostCalculator, UsdCents};
+
+// Draft image-to-video shares the Flux 3 Draft generation pricing (see the
+// draft text module for the canonical rate):
+//   $0.06 per second of generated draft video (always 720p)
+
+impl FalRequestCostCalculator for Flux3DraftImageToVideoRequest {
+  fn calculate_cost_in_cents(&self) -> UsdCents {
+    let duration_secs = flux_3_estimated_duration_secs(self.duration);
+    flux_3_video_cost_cents(flux_3_draft_generation_rate_cents_per_sec(), duration_secs)
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+  use crate::requests::api::video::text::flux_3::api::Flux3Duration;
+
+  fn make_request(duration: Option<Flux3Duration>) -> Flux3DraftImageToVideoRequest {
+    Flux3DraftImageToVideoRequest {
+      prompt: "test".to_string(),
+      image_url: "https://example.com/frame.png".to_string(),
+      duration,
+      aspect_ratio: None,
+      generate_audio: None,
+      safety_tolerance: None,
+    }
+  }
+
+  mod cost_table {
+    use super::*;
+
+    // (duration, expected_cents) — 6¢ × secs; None/auto estimate at 5s.
+    const COST_TABLE: &[(Option<Flux3Duration>, u64)] = &[
+      (Some(Flux3Duration::Seconds(5)),  30),
+      (Some(Flux3Duration::Seconds(20)), 120),
+      (None, 30),
+      (Some(Flux3Duration::Auto), 30),
+    ];
+
+    #[test]
+    fn matches_cost_table() {
+      for &(duration, expected) in COST_TABLE {
+        let got = make_request(duration).calculate_cost_in_cents();
+        assert_eq!(got, expected, "duration={duration:?}");
+      }
+    }
+  }
+}

crates/api_clients/fal_client/src/requests/api/video/image/flux_3_draft/mod.rs

@@ -0,0 +1,3 @@
+pub mod api;
+pub mod cost;
+pub mod raw_request;

crates/api_clients/fal_client/src/requests/api/video/image/flux_3_draft/raw_request.rs

@@ -0,0 +1,46 @@
+use serde::{Deserialize, Serialize};
+
+use crate::requests::api::video::text::flux_3::api::Flux3Duration;
+
+/// Over-the-wire input shape for `blackforestlabs/flux-3/image-to-video/draft`.
+/// fal's schema: <https://fal.ai/models/blackforestlabs/flux-3/image-to-video/draft/api>
+#[derive(Debug, Serialize, Deserialize, Default)]
+pub struct Flux3DraftImageToVideoInput {
+  /// Text prompt for video generation.
+  pub prompt: String,
+
+  /// URL of the image to animate.
+  pub image_url: String,
+
+  /// Duration in seconds ("auto" or 5–20). fal default: "auto".
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub duration: Option<Flux3Duration>,
+
+  /// Aspect ratio.
+  /// Possible values: "auto", "21:9", "2:1", "16:9", "4:3", "1:1", "3:4",
+  /// "9:16". fal default: "auto".
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub aspect_ratio: Option<String>,
+
+  /// Whether to generate synchronized audio. fal default: true.
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub generate_audio: Option<bool>,
+
+  /// Safety tolerance, 0 (strictest) to 4 (most permissive). fal default: 2.
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub safety_tolerance: Option<u8>,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Flux3DraftImageToVideoVideoFile {
+  pub url: String,
+}
+
+/// Draft outputs carry the 720p draft video plus a durable encrypted cache
+/// bundle whose URL can be passed to `draft-enhance` for a full-quality
+/// 1080p render.
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Flux3DraftImageToVideoOutput {
+  pub video: Flux3DraftImageToVideoVideoFile,
+  pub draft_cache: Flux3DraftImageToVideoVideoFile,
+}

crates/api_clients/fal_client/src/requests/api/video/image/minimax_h3/api.rs

@@ -0,0 +1,139 @@
+use crate::error::fal_error_plus::FalErrorPlus;
+use crate::requests::api::video::image::minimax_h3::raw_request::{
+  MinimaxH3ImageToVideoInput, MinimaxH3ImageToVideoOutput,
+};
+use crate::requests::api::video::text::minimax_h3::api::MinimaxH3Resolution;
+use crate::requests::traits::fal_endpoint_trait::FalEndpoint;
+
+#[derive(Clone, Debug)]
+pub struct MinimaxH3ImageToVideoRequest {
+  /// Text prompt (1 to 7000 characters).
+  pub prompt: String,
+
+  /// URL of the image to use as the first frame. The output aspect ratio
+  /// follows this image.
+  pub image_url: String,
+
+  /// Optional URL of the image to use as the last frame, for first-to-last
+  /// keyframe generation.
+  pub end_image_url: Option<String>,
+
+  /// Duration in seconds. Valid range 5–15; fal's default is `5` when `None`.
+  pub duration: Option<u8>,
+
+  /// Output resolution. fal's default is `2K` when `None`.
+  pub resolution: Option<MinimaxH3Resolution>,
+}
+
+impl FalEndpoint for MinimaxH3ImageToVideoRequest {
+  const ENDPOINT: &str = "minimax/h3/image-to-video";
+
+  type RawRequest = MinimaxH3ImageToVideoInput;
+  type RawResponse = MinimaxH3ImageToVideoOutput;
+
+  fn to_raw_request(&self) -> Result<Self::RawRequest, FalErrorPlus> {
+    Ok(Self::RawRequest {
+      prompt: self.prompt.clone(),
+      image_url: self.image_url.clone(),
+      end_image_url: self.end_image_url.clone(),
+      duration: self.duration,
+      resolution: self.resolution.map(|r| r.to_str().to_string()),
+    })
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+  use crate::creds::fal_api_key::FalApiKey;
+  use crate::requests::traits::fal_endpoint_trait::FalEndpoint;
+  use errors::AnyhowResult;
+  use std::fs::read_to_string;
+
+  const EXAMPLE_IMAGE_URL: &str =
+    "https://storage.googleapis.com/falserverless/example_inputs/hailuo23/pro_i2v_in.jpg";
+
+  // ── Real requests (manually run; require a live key and cost money) ──
+
+  #[tokio::test]
+  #[ignore] // manually run — fires a real API request and incurs cost
+  async fn test_image_to_video_webhook() -> AnyhowResult<()> {
+    let secret = read_to_string("/Users/bt/Artcraft/credentials/fal_api_key.txt")?;
+    let api_key = FalApiKey::from_str(&secret);
+
+    let request = MinimaxH3ImageToVideoRequest {
+      prompt: "the camera slowly pulls back, revealing the full landscape".to_string(),
+      image_url: EXAMPLE_IMAGE_URL.to_string(),
+      end_image_url: None,
+      duration: Some(5),
+      resolution: Some(MinimaxH3Resolution::SevenSixtyEightP),
+    };
+
+    let result = request.send_webhook_request(&api_key, "https://example.com/webhook").await?;
+    println!("Webhook result: {:?}", result);
+    assert!(result.request_id.is_some() || result.gateway_request_id.is_some());
+    Ok(())
+  }
+
+  #[tokio::test]
+  #[ignore] // manually run — fires a real API request and incurs cost
+  async fn test_image_to_video_queue() -> AnyhowResult<()> {
+    let secret = read_to_string("/Users/bt/Artcraft/credentials/fal_api_key.txt")?;
+    let api_key = FalApiKey::from_str(&secret);
+
+    let request = MinimaxH3ImageToVideoRequest {
+      prompt: "gentle wind moves through the scene as clouds drift overhead".to_string(),
+      image_url: EXAMPLE_IMAGE_URL.to_string(),
+      end_image_url: None,
+      duration: Some(5),
+      resolution: Some(MinimaxH3Resolution::SevenSixtyEightP),
+    };
+
+    let result = request.send_queue_request(&api_key).await?;
+    println!("Queue result — request_id: {}", result.request_id);
+    assert!(!result.request_id.is_empty());
+    Ok(())
+  }
+
+  // ── Wire-shape sanity (no API calls) ──
+
+  #[test]
+  fn raw_request_maps_all_fields() {
+    let request = MinimaxH3ImageToVideoRequest {
+      prompt: "p".to_string(),
+      image_url: "https://example.com/first.png".to_string(),
+      end_image_url: Some("https://example.com/last.png".to_string()),
+      duration: Some(12),
+      resolution: Some(MinimaxH3Resolution::TwoK),
+    };
+    let raw = request.to_raw_request().unwrap();
+    assert_eq!(raw.prompt, "p");
+    assert_eq!(raw.image_url, "https://example.com/first.png");
+    assert_eq!(raw.end_image_url.as_deref(), Some("https://example.com/last.png"));
+    assert_eq!(raw.duration, Some(12));
+    assert_eq!(raw.resolution.as_deref(), Some("2K"));
+  }
+
+  #[test]
+  fn raw_request_omits_unset_optionals() {
+    let request = MinimaxH3ImageToVideoRequest {
+      prompt: "minimal".to_string(),
+      image_url: "https://example.com/first.png".to_string(),
+      end_image_url: None,
+      duration: None,
+      resolution: None,
+    };
+    let json = serde_json::to_value(request.to_raw_request().unwrap()).unwrap();
+    assert_eq!(json, serde_json::json!({
+      "prompt": "minimal",
+      "image_url": "https://example.com/first.png",
+    }));
+  }
+
+  #[test]
+  fn endpoint_path_is_canonical() {
+    assert_eq!(MinimaxH3ImageToVideoRequest::ENDPOINT, "minimax/h3/image-to-video");
+  }
+
+  // NB: Pricing tests are in cost.rs
+}

crates/api_clients/fal_client/src/requests/api/video/image/minimax_h3/cost.rs

@@ -0,0 +1,78 @@
+use crate::requests::api::video::image::minimax_h3::api::MinimaxH3ImageToVideoRequest;
+use crate::requests::api::video::text::minimax_h3::api::MinimaxH3Resolution;
+use crate::requests::api::video::text::minimax_h3::cost::{
+  minimax_h3_rate_cents_per_sec, minimax_h3_video_cost_cents,
+};
+use crate::requests::traits::fal_request_cost_calculator_trait::{FalRequestCostCalculator, UsdCents};
+
+// Image-to-video shares the MiniMax H3 per-second pricing (see the text module
+// for the canonical rate table):
+//   768P: $0.16/sec
+//   2K:   $0.26/sec
+// Pricing depends on resolution and duration only (start/end frames are free).
+
+impl FalRequestCostCalculator for MinimaxH3ImageToVideoRequest {
+  fn calculate_cost_in_cents(&self) -> UsdCents {
+    // fal defaults when unset: duration = 5s, resolution = 2K.
+    let duration_secs = u64::from(self.duration.unwrap_or(5));
+    let is_2k = self.resolution
+      .unwrap_or(MinimaxH3Resolution::TwoK)
+      .is_2k();
+
+    let rate = minimax_h3_rate_cents_per_sec(is_2k);
+    minimax_h3_video_cost_cents(rate, duration_secs)
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+
+  fn make_request(
+    duration: Option<u8>,
+    resolution: Option<MinimaxH3Resolution>,
+  ) -> MinimaxH3ImageToVideoRequest {
+    MinimaxH3ImageToVideoRequest {
+      prompt: "test".to_string(),
+      image_url: "https://example.com/first.png".to_string(),
+      end_image_url: None,
+      duration,
+      resolution,
+    }
+  }
+
+  mod cost_table {
+    use super::*;
+
+    // (duration, resolution, expected_cents)
+    const COST_TABLE: &[(Option<u8>, Option<MinimaxH3Resolution>, u64)] = &[
+      // 768P → $0.16/s
+      (Some(5),  Some(MinimaxH3Resolution::SevenSixtyEightP), 80),
+      (Some(15), Some(MinimaxH3Resolution::SevenSixtyEightP), 240),
+      // 2K → $0.26/s
+      (Some(5),  Some(MinimaxH3Resolution::TwoK), 130),
+      (Some(15), Some(MinimaxH3Resolution::TwoK), 390),
+      // Defaults: duration=None→5s, resolution=None→2K
+      (None, None, 130),
+    ];
+
+    #[test]
+    fn matches_cost_table() {
+      for &(duration, resolution, expected) in COST_TABLE {
+        let got = make_request(duration, resolution).calculate_cost_in_cents();
+        assert_eq!(got, expected, "duration={duration:?} resolution={resolution:?}");
+      }
+    }
+
+    /// The end frame does not affect the bill (only resolution + duration do).
+    #[test]
+    fn cost_ignores_end_image() {
+      let without = make_request(Some(8), Some(MinimaxH3Resolution::TwoK)).calculate_cost_in_cents();
+      let with = MinimaxH3ImageToVideoRequest {
+        end_image_url: Some("https://example.com/last.png".to_string()),
+        ..make_request(Some(8), Some(MinimaxH3Resolution::TwoK))
+      }.calculate_cost_in_cents();
+      assert_eq!(with, without);
+    }
+  }
+}

crates/api_clients/fal_client/src/requests/api/video/image/minimax_h3/mod.rs

@@ -0,0 +1,3 @@
+pub mod api;
+pub mod cost;
+pub mod raw_request;

crates/api_clients/fal_client/src/requests/api/video/image/minimax_h3/raw_request.rs

@@ -0,0 +1,37 @@
+use serde::{Deserialize, Serialize};
+
+/// Over-the-wire input shape for `minimax/h3/image-to-video`.
+/// fal's schema: <https://fal.ai/models/minimax/h3/image-to-video/api>
+#[derive(Debug, Serialize, Deserialize, Default)]
+pub struct MinimaxH3ImageToVideoInput {
+  /// Text prompt (1 to 7000 characters).
+  pub prompt: String,
+
+  /// URL of the image to use as the first frame. The output aspect ratio
+  /// follows this image.
+  pub image_url: String,
+
+  /// Optional URL of the image to use as the last frame, for first-to-last
+  /// keyframe generation.
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub end_image_url: Option<String>,
+
+  /// Duration in seconds. Range 5–15. fal default: 5.
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub duration: Option<u8>,
+
+  /// Output resolution.
+  /// Possible values: "768P", "2K". fal default: "2K".
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub resolution: Option<String>,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct MinimaxH3ImageToVideoVideoFile {
+  pub url: String,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct MinimaxH3ImageToVideoOutput {
+  pub video: MinimaxH3ImageToVideoVideoFile,
+}

crates/api_clients/fal_client/src/requests/api/video/image/mod.rs

@@ -1,7 +1,10 @@
+pub mod flux_3;
+pub mod flux_3_draft;
 pub mod kling_1p6_pro_image_to_video;
 pub mod kling_2p5_turbo_pro_image_to_video;
 pub mod kling_2p6_pro_image_to_video;
 pub mod kling_3p0_standard_image_to_video;
+pub mod minimax_h3;
 pub mod veo_2;
 pub mod veo_3;
 pub mod veo_3_fast;

crates/api_clients/fal_client/src/requests/api/video/images/flux_3/api.rs

@@ -0,0 +1,148 @@
+use crate::error::fal_error_plus::FalErrorPlus;
+use crate::requests::api::video::images::flux_3::raw_request::{
+  Flux3FirstLastFrameToVideoInput, Flux3FirstLastFrameToVideoOutput,
+};
+use crate::requests::api::video::text::flux_3::api::{Flux3AspectRatio, Flux3Resolution};
+use crate::requests::traits::fal_endpoint_trait::FalEndpoint;
+
+#[derive(Clone, Debug)]
+pub struct Flux3FirstLastFrameToVideoRequest {
+  /// Text prompt for video generation.
+  pub prompt: String,
+
+  /// URL of the first frame.
+  pub start_image_url: String,
+
+  /// URL of the last frame.
+  pub end_image_url: String,
+
+  /// Duration in seconds. Valid range 5–20; fal's default is `5` when `None`.
+  pub duration: Option<u8>,
+
+  /// Output resolution. fal's default is `720p` when `None`.
+  pub resolution: Option<Flux3Resolution>,
+
+  /// Aspect ratio. fal's default is `auto` when `None`.
+  pub aspect_ratio: Option<Flux3AspectRatio>,
+
+  /// Whether to generate synchronized audio. fal's default is `true` when
+  /// `None`. Audio does not affect the bill.
+  pub generate_audio: Option<bool>,
+
+  /// Safety tolerance, 0 (strictest) to 4 (most permissive). fal's default is
+  /// `2` when `None`.
+  pub safety_tolerance: Option<u8>,
+}
+
+impl FalEndpoint for Flux3FirstLastFrameToVideoRequest {
+  const ENDPOINT: &str = "blackforestlabs/flux-3/first-last-frame-to-video";
+
+  type RawRequest = Flux3FirstLastFrameToVideoInput;
+  type RawResponse = Flux3FirstLastFrameToVideoOutput;
+
+  fn to_raw_request(&self) -> Result<Self::RawRequest, FalErrorPlus> {
+    Ok(Self::RawRequest {
+      prompt: self.prompt.clone(),
+      start_image_url: self.start_image_url.clone(),
+      end_image_url: self.end_image_url.clone(),
+      duration: self.duration,
+      resolution: self.resolution.map(|r| r.to_str().to_string()),
+      aspect_ratio: self.aspect_ratio.map(|ar| ar.to_str().to_string()),
+      generate_audio: self.generate_audio,
+      safety_tolerance: self.safety_tolerance,
+    })
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+  use crate::creds::fal_api_key::FalApiKey;
+  use crate::requests::traits::fal_endpoint_trait::FalEndpoint;
+  use errors::AnyhowResult;
+  use std::fs::read_to_string;
+
+  const START_IMAGE_URL: &str =
+    "https://storage.googleapis.com/falserverless/example_inputs/veo31-flf2v-input-1.jpeg";
+  const END_IMAGE_URL: &str =
+    "https://storage.googleapis.com/falserverless/example_inputs/veo31-flf2v-input-2.jpeg";
+
+  // ── Real requests (manually run; require a live key and cost money) ──
+
+  #[tokio::test]
+  #[ignore] // manually run — fires a real API request and incurs cost
+  async fn test_first_last_frame_to_video_queue() -> AnyhowResult<()> {
+    let secret = read_to_string("/Users/bt/Artcraft/credentials/fal_api_key.txt")?;
+    let api_key = FalApiKey::from_str(&secret);
+
+    let request = Flux3FirstLastFrameToVideoRequest {
+      prompt: "the scene smoothly transitions from the first frame to the last".to_string(),
+      start_image_url: START_IMAGE_URL.to_string(),
+      end_image_url: END_IMAGE_URL.to_string(),
+      duration: Some(5),
+      resolution: Some(Flux3Resolution::SevenTwentyP),
+      aspect_ratio: None,
+      generate_audio: Some(false),
+      safety_tolerance: None,
+    };
+
+    let result = request.send_queue_request(&api_key).await?;
+    println!("Queue result — request_id: {}", result.request_id);
+    assert!(!result.request_id.is_empty());
+    Ok(())
+  }
+
+  // ── Wire-shape sanity (no API calls) ──
+
+  #[test]
+  fn raw_request_maps_all_fields() {
+    let request = Flux3FirstLastFrameToVideoRequest {
+      prompt: "p".to_string(),
+      start_image_url: "https://example.com/first.png".to_string(),
+      end_image_url: "https://example.com/last.png".to_string(),
+      duration: Some(12),
+      resolution: Some(Flux3Resolution::TenEightyP),
+      aspect_ratio: Some(Flux3AspectRatio::FourByThree),
+      generate_audio: Some(true),
+      safety_tolerance: Some(3),
+    };
+    let raw = request.to_raw_request().unwrap();
+    assert_eq!(raw.prompt, "p");
+    assert_eq!(raw.start_image_url, "https://example.com/first.png");
+    assert_eq!(raw.end_image_url, "https://example.com/last.png");
+    assert_eq!(raw.duration, Some(12));
+    assert_eq!(raw.resolution.as_deref(), Some("1080p"));
+    assert_eq!(raw.aspect_ratio.as_deref(), Some("4:3"));
+    assert_eq!(raw.generate_audio, Some(true));
+    assert_eq!(raw.safety_tolerance, Some(3));
+  }
+
+  #[test]
+  fn raw_request_omits_unset_optionals() {
+    let request = Flux3FirstLastFrameToVideoRequest {
+      prompt: "minimal".to_string(),
+      start_image_url: "https://example.com/first.png".to_string(),
+      end_image_url: "https://example.com/last.png".to_string(),
+      duration: None,
+      resolution: None,
+      aspect_ratio: None,
+      generate_audio: None,
+      safety_tolerance: None,
+    };
+    let json = serde_json::to_value(request.to_raw_request().unwrap()).unwrap();
+    assert_eq!(json, serde_json::json!({
+      "prompt": "minimal",
+      "start_image_url": "https://example.com/first.png",
+      "end_image_url": "https://example.com/last.png",
+    }));
+  }
+
+  #[test]
+  fn endpoint_path_is_canonical() {
+    assert_eq!(
+      Flux3FirstLastFrameToVideoRequest::ENDPOINT,
+      "blackforestlabs/flux-3/first-last-frame-to-video");
+  }
+
+  // NB: Pricing tests are in cost.rs
+}

crates/api_clients/fal_client/src/requests/api/video/images/flux_3/cost.rs

@@ -0,0 +1,64 @@
+use crate::requests::api::video::images::flux_3::api::Flux3FirstLastFrameToVideoRequest;
+use crate::requests::api::video::text::flux_3::cost::{
+  flux_3_is_1080p, flux_3_standard_rate_cents_per_sec, flux_3_video_cost_cents,
+};
+use crate::requests::traits::fal_request_cost_calculator_trait::{FalRequestCostCalculator, UsdCents};
+
+// First-last-frame-to-video shares the standard Flux 3 per-second pricing
+// (see the text module for the canonical rate table):
+//   720p:  $0.17/sec
+//   1080p: $0.29/sec
+// The input frames are free; pricing depends on resolution and duration only.
+
+impl FalRequestCostCalculator for Flux3FirstLastFrameToVideoRequest {
+  fn calculate_cost_in_cents(&self) -> UsdCents {
+    // fal default when unset: duration = 5s.
+    let duration_secs = u64::from(self.duration.unwrap_or(5));
+    let rate = flux_3_standard_rate_cents_per_sec(flux_3_is_1080p(self.resolution));
+    flux_3_video_cost_cents(rate, duration_secs)
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+  use crate::requests::api::video::text::flux_3::api::Flux3Resolution;
+
+  fn make_request(
+    duration: Option<u8>,
+    resolution: Option<Flux3Resolution>,
+  ) -> Flux3FirstLastFrameToVideoRequest {
+    Flux3FirstLastFrameToVideoRequest {
+      prompt: "test".to_string(),
+      start_image_url: "https://example.com/first.png".to_string(),
+      end_image_url: "https://example.com/last.png".to_string(),
+      duration,
+      resolution,
+      aspect_ratio: None,
+      generate_audio: None,
+      safety_tolerance: None,
+    }
+  }
+
+  mod cost_table {
+    use super::*;
+
+    // (duration, resolution, expected_cents)
+    const COST_TABLE: &[(Option<u8>, Option<Flux3Resolution>, u64)] = &[
+      (Some(5),  Some(Flux3Resolution::SevenTwentyP), 85),
+      (Some(20), Some(Flux3Resolution::SevenTwentyP), 340),
+      (Some(5),  Some(Flux3Resolution::TenEightyP), 145),
+      (Some(20), Some(Flux3Resolution::TenEightyP), 580),
+      // Defaults: duration=None→5s, resolution=None→720p
+      (None, None, 85),
+    ];
+
+    #[test]
+    fn matches_cost_table() {
+      for &(duration, resolution, expected) in COST_TABLE {
+        let got = make_request(duration, resolution).calculate_cost_in_cents();
+        assert_eq!(got, expected, "duration={duration:?} resolution={resolution:?}");
+      }
+    }
+  }
+}

crates/api_clients/fal_client/src/requests/api/video/images/flux_3/mod.rs

@@ -0,0 +1,3 @@
+pub mod api;
+pub mod cost;
+pub mod raw_request;

crates/api_clients/fal_client/src/requests/api/video/images/flux_3/raw_request.rs

@@ -0,0 +1,48 @@
+use serde::{Deserialize, Serialize};
+
+/// Over-the-wire input shape for `blackforestlabs/flux-3/first-last-frame-to-video`.
+/// fal's schema: <https://fal.ai/models/blackforestlabs/flux-3/first-last-frame-to-video/api>
+#[derive(Debug, Serialize, Deserialize, Default)]
+pub struct Flux3FirstLastFrameToVideoInput {
+  /// Text prompt for video generation.
+  pub prompt: String,
+
+  /// URL of the first frame.
+  pub start_image_url: String,
+
+  /// URL of the last frame.
+  pub end_image_url: String,
+
+  /// Duration in seconds (5–20). fal default: 5.
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub duration: Option<u8>,
+
+  /// Output resolution.
+  /// Possible values: "720p", "1080p". fal default: "720p".
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub resolution: Option<String>,
+
+  /// Aspect ratio.
+  /// Possible values: "auto", "21:9", "2:1", "16:9", "4:3", "1:1", "3:4",
+  /// "9:16". fal default: "auto".
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub aspect_ratio: Option<String>,
+
+  /// Whether to generate synchronized audio. fal default: true.
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub generate_audio: Option<bool>,
+
+  /// Safety tolerance, 0 (strictest) to 4 (most permissive). fal default: 2.
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub safety_tolerance: Option<u8>,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Flux3FirstLastFrameToVideoVideoFile {
+  pub url: String,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Flux3FirstLastFrameToVideoOutput {
+  pub video: Flux3FirstLastFrameToVideoVideoFile,
+}

crates/api_clients/fal_client/src/requests/api/video/images/flux_3_draft/api.rs

@@ -0,0 +1,143 @@
+use crate::error::fal_error_plus::FalErrorPlus;
+use crate::requests::api::video::images::flux_3_draft::raw_request::{
+  Flux3DraftFirstLastFrameToVideoInput, Flux3DraftFirstLastFrameToVideoOutput,
+};
+use crate::requests::api::video::text::flux_3::api::Flux3AspectRatio;
+use crate::requests::traits::fal_endpoint_trait::FalEndpoint;
+
+/// Flux 3 Draft first-last-frame-to-video: lower cost, lower fidelity (always
+/// 720p). The response includes a `draft_cache` that `draft-enhance` can
+/// upgrade to a full-quality 1080p render.
+#[derive(Clone, Debug)]
+pub struct Flux3DraftFirstLastFrameToVideoRequest {
+  /// Text prompt for video generation.
+  pub prompt: String,
+
+  /// URL of the first frame.
+  pub start_image_url: String,
+
+  /// URL of the last frame.
+  pub end_image_url: String,
+
+  /// Duration in seconds. Valid range 5–20; fal's default is `5` when `None`.
+  pub duration: Option<u8>,
+
+  /// Aspect ratio. fal's default is `auto` when `None`.
+  pub aspect_ratio: Option<Flux3AspectRatio>,
+
+  /// Whether to generate synchronized audio. fal's default is `true` when
+  /// `None`. Audio does not affect the bill.
+  pub generate_audio: Option<bool>,
+
+  /// Safety tolerance, 0 (strictest) to 4 (most permissive). fal's default is
+  /// `2` when `None`.
+  pub safety_tolerance: Option<u8>,
+}
+
+impl FalEndpoint for Flux3DraftFirstLastFrameToVideoRequest {
+  const ENDPOINT: &str = "blackforestlabs/flux-3/first-last-frame-to-video/draft";
+
+  type RawRequest = Flux3DraftFirstLastFrameToVideoInput;
+  type RawResponse = Flux3DraftFirstLastFrameToVideoOutput;
+
+  fn to_raw_request(&self) -> Result<Self::RawRequest, FalErrorPlus> {
+    Ok(Self::RawRequest {
+      prompt: self.prompt.clone(),
+      start_image_url: self.start_image_url.clone(),
+      end_image_url: self.end_image_url.clone(),
+      duration: self.duration,
+      aspect_ratio: self.aspect_ratio.map(|ar| ar.to_str().to_string()),
+      generate_audio: self.generate_audio,
+      safety_tolerance: self.safety_tolerance,
+    })
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+  use crate::creds::fal_api_key::FalApiKey;
+  use crate::requests::traits::fal_endpoint_trait::FalEndpoint;
+  use errors::AnyhowResult;
+  use std::fs::read_to_string;
+
+  const START_IMAGE_URL: &str =
+    "https://storage.googleapis.com/falserverless/example_inputs/veo31-flf2v-input-1.jpeg";
+  const END_IMAGE_URL: &str =
+    "https://storage.googleapis.com/falserverless/example_inputs/veo31-flf2v-input-2.jpeg";
+
+  // ── Real requests (manually run; require a live key and cost money) ──
+
+  #[tokio::test]
+  #[ignore] // manually run — fires a real API request and incurs cost
+  async fn test_first_last_frame_to_video_queue() -> AnyhowResult<()> {
+    let secret = read_to_string("/Users/bt/Artcraft/credentials/fal_api_key.txt")?;
+    let api_key = FalApiKey::from_str(&secret);
+
+    let request = Flux3DraftFirstLastFrameToVideoRequest {
+      prompt: "the scene smoothly transitions from the first frame to the last".to_string(),
+      start_image_url: START_IMAGE_URL.to_string(),
+      end_image_url: END_IMAGE_URL.to_string(),
+      duration: Some(5),
+      aspect_ratio: None,
+      generate_audio: Some(false),
+      safety_tolerance: None,
+    };
+
+    let result = request.send_queue_request(&api_key).await?;
+    println!("Queue result — request_id: {}", result.request_id);
+    assert!(!result.request_id.is_empty());
+    Ok(())
+  }
+
+  // ── Wire-shape sanity (no API calls) ──
+
+  #[test]
+  fn raw_request_maps_all_fields() {
+    let request = Flux3DraftFirstLastFrameToVideoRequest {
+      prompt: "p".to_string(),
+      start_image_url: "https://example.com/first.png".to_string(),
+      end_image_url: "https://example.com/last.png".to_string(),
+      duration: Some(7),
+      aspect_ratio: Some(Flux3AspectRatio::Square),
+      generate_audio: Some(false),
+      safety_tolerance: Some(2),
+    };
+    let raw = request.to_raw_request().unwrap();
+    assert_eq!(raw.prompt, "p");
+    assert_eq!(raw.start_image_url, "https://example.com/first.png");
+    assert_eq!(raw.end_image_url, "https://example.com/last.png");
+    assert_eq!(raw.duration, Some(7));
+    assert_eq!(raw.aspect_ratio.as_deref(), Some("1:1"));
+    assert_eq!(raw.generate_audio, Some(false));
+    assert_eq!(raw.safety_tolerance, Some(2));
+  }
+
+  #[test]
+  fn raw_request_omits_unset_optionals() {
+    let request = Flux3DraftFirstLastFrameToVideoRequest {
+      prompt: "minimal".to_string(),
+      start_image_url: "https://example.com/first.png".to_string(),
+      end_image_url: "https://example.com/last.png".to_string(),
+      duration: None,
+      aspect_ratio: None,
+      generate_audio: None,
+      safety_tolerance: None,
+    };
+    let json = serde_json::to_value(request.to_raw_request().unwrap()).unwrap();
+    assert_eq!(json, serde_json::json!({
+      "prompt": "minimal",
+      "start_image_url": "https://example.com/first.png",
+      "end_image_url": "https://example.com/last.png",
+    }));
+  }
+
+  #[test]
+  fn endpoint_path_is_canonical() {
+    assert_eq!(
+      Flux3DraftFirstLastFrameToVideoRequest::ENDPOINT,
+      "blackforestlabs/flux-3/first-last-frame-to-video/draft");
+  }
+
+  // NB: Pricing tests are in cost.rs
+}

crates/api_clients/fal_client/src/requests/api/video/images/flux_3_draft/cost.rs

@@ -0,0 +1,52 @@
+use crate::requests::api::video::images::flux_3_draft::api::Flux3DraftFirstLastFrameToVideoRequest;
+use crate::requests::api::video::text::flux_3::cost::flux_3_video_cost_cents;
+use crate::requests::api::video::text::flux_3_draft::cost::flux_3_draft_generation_rate_cents_per_sec;
+use crate::requests::traits::fal_request_cost_calculator_trait::{FalRequestCostCalculator, UsdCents};
+
+// Draft first-last-frame-to-video shares the Flux 3 Draft generation pricing
+// (see the draft text module for the canonical rate):
+//   $0.06 per second of generated draft video (always 720p)
+
+impl FalRequestCostCalculator for Flux3DraftFirstLastFrameToVideoRequest {
+  fn calculate_cost_in_cents(&self) -> UsdCents {
+    // fal default when unset: duration = 5s.
+    let duration_secs = u64::from(self.duration.unwrap_or(5));
+    flux_3_video_cost_cents(flux_3_draft_generation_rate_cents_per_sec(), duration_secs)
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+
+  fn make_request(duration: Option<u8>) -> Flux3DraftFirstLastFrameToVideoRequest {
+    Flux3DraftFirstLastFrameToVideoRequest {
+      prompt: "test".to_string(),
+      start_image_url: "https://example.com/first.png".to_string(),
+      end_image_url: "https://example.com/last.png".to_string(),
+      duration,
+      aspect_ratio: None,
+      generate_audio: None,
+      safety_tolerance: None,
+    }
+  }
+
+  mod cost_table {
+    use super::*;
+
+    // (duration, expected_cents) — 6¢ × secs; None defaults to 5s.
+    const COST_TABLE: &[(Option<u8>, u64)] = &[
+      (Some(5),  30),
+      (Some(20), 120),
+      (None, 30),
+    ];
+
+    #[test]
+    fn matches_cost_table() {
+      for &(duration, expected) in COST_TABLE {
+        let got = make_request(duration).calculate_cost_in_cents();
+        assert_eq!(got, expected, "duration={duration:?}");
+      }
+    }
+  }
+}

crates/api_clients/fal_client/src/requests/api/video/images/flux_3_draft/mod.rs

@@ -0,0 +1,3 @@
+pub mod api;
+pub mod cost;
+pub mod raw_request;

crates/api_clients/fal_client/src/requests/api/video/images/flux_3_draft/raw_request.rs

@@ -0,0 +1,47 @@
+use serde::{Deserialize, Serialize};
+
+/// Over-the-wire input shape for `blackforestlabs/flux-3/first-last-frame-to-video/draft`.
+/// fal's schema: <https://fal.ai/models/blackforestlabs/flux-3/first-last-frame-to-video/draft/api>
+#[derive(Debug, Serialize, Deserialize, Default)]
+pub struct Flux3DraftFirstLastFrameToVideoInput {
+  /// Text prompt for video generation.
+  pub prompt: String,
+
+  /// URL of the first frame.
+  pub start_image_url: String,
+
+  /// URL of the last frame.
+  pub end_image_url: String,
+
+  /// Duration in seconds (5–20). fal default: 5.
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub duration: Option<u8>,
+
+  /// Aspect ratio.
+  /// Possible values: "auto", "21:9", "2:1", "16:9", "4:3", "1:1", "3:4",
+  /// "9:16". fal default: "auto".
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub aspect_ratio: Option<String>,
+
+  /// Whether to generate synchronized audio. fal default: true.
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub generate_audio: Option<bool>,
+
+  /// Safety tolerance, 0 (strictest) to 4 (most permissive). fal default: 2.
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub safety_tolerance: Option<u8>,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Flux3DraftFirstLastFrameToVideoVideoFile {
+  pub url: String,
+}
+
+/// Draft outputs carry the 720p draft video plus a durable encrypted cache
+/// bundle whose URL can be passed to `draft-enhance` for a full-quality
+/// 1080p render.
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Flux3DraftFirstLastFrameToVideoOutput {
+  pub video: Flux3DraftFirstLastFrameToVideoVideoFile,
+  pub draft_cache: Flux3DraftFirstLastFrameToVideoVideoFile,
+}

crates/api_clients/fal_client/src/requests/api/video/images/mod.rs

@@ -1,3 +1,5 @@
+pub mod flux_3;
+pub mod flux_3_draft;
 pub mod veo_3p1;
 pub mod veo_3p1_fast;
 pub mod veo_3p1_lite;

crates/api_clients/fal_client/src/requests/api/video/keyframes/flux_3/api.rs

@@ -0,0 +1,150 @@
+use crate::error::fal_error_plus::FalErrorPlus;
+use crate::requests::api::video::keyframes::flux_3::raw_request::{
+  Flux3Keyframe, Flux3KeyframesToVideoInput, Flux3KeyframesToVideoOutput,
+};
+use crate::requests::api::video::text::flux_3::api::{Flux3AspectRatio, Flux3Resolution};
+use crate::requests::traits::fal_endpoint_trait::FalEndpoint;
+
+#[derive(Clone, Debug)]
+pub struct Flux3KeyframesToVideoRequest {
+  /// Text prompt for video generation.
+  pub prompt: String,
+
+  /// Keyframe images pinned to frame positions in the generated 24 fps video
+  /// (1 to 10 entries with unique `frame_index` values, each at most
+  /// `duration * 24`).
+  pub keyframes: Vec<Flux3Keyframe>,
+
+  /// Duration in seconds. Valid range 5–20; fal's default is `5` when `None`.
+  pub duration: Option<u8>,
+
+  /// Output resolution. fal's default is `720p` when `None`.
+  pub resolution: Option<Flux3Resolution>,
+
+  /// Aspect ratio. fal's default is `auto` when `None`.
+  pub aspect_ratio: Option<Flux3AspectRatio>,
+
+  /// Whether to generate synchronized audio. fal's default is `true` when
+  /// `None`. Audio does not affect the bill.
+  pub generate_audio: Option<bool>,
+
+  /// Safety tolerance, 0 (strictest) to 4 (most permissive). fal's default is
+  /// `2` when `None`.
+  pub safety_tolerance: Option<u8>,
+}
+
+impl FalEndpoint for Flux3KeyframesToVideoRequest {
+  const ENDPOINT: &str = "blackforestlabs/flux-3/keyframes-to-video";
+
+  type RawRequest = Flux3KeyframesToVideoInput;
+  type RawResponse = Flux3KeyframesToVideoOutput;
+
+  fn to_raw_request(&self) -> Result<Self::RawRequest, FalErrorPlus> {
+    Ok(Self::RawRequest {
+      prompt: self.prompt.clone(),
+      keyframes: self.keyframes.clone(),
+      duration: self.duration,
+      resolution: self.resolution.map(|r| r.to_str().to_string()),
+      aspect_ratio: self.aspect_ratio.map(|ar| ar.to_str().to_string()),
+      generate_audio: self.generate_audio,
+      safety_tolerance: self.safety_tolerance,
+    })
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+  use crate::creds::fal_api_key::FalApiKey;
+  use crate::requests::traits::fal_endpoint_trait::FalEndpoint;
+  use errors::AnyhowResult;
+  use std::fs::read_to_string;
+
+  const KEYFRAME_ONE_URL: &str =
+    "https://storage.googleapis.com/falserverless/example_inputs/veo31-flf2v-input-1.jpeg";
+  const KEYFRAME_TWO_URL: &str =
+    "https://storage.googleapis.com/falserverless/example_inputs/veo31-flf2v-input-2.jpeg";
+
+  // ── Real requests (manually run; require a live key and cost money) ──
+
+  #[tokio::test]
+  #[ignore] // manually run — fires a real API request and incurs cost
+  async fn test_keyframes_to_video_queue() -> AnyhowResult<()> {
+    let secret = read_to_string("/Users/bt/Artcraft/credentials/fal_api_key.txt")?;
+    let api_key = FalApiKey::from_str(&secret);
+
+    let request = Flux3KeyframesToVideoRequest {
+      prompt: "the scene flows naturally between the pinned keyframes".to_string(),
+      keyframes: vec![
+        Flux3Keyframe { image_url: KEYFRAME_ONE_URL.to_string(), frame_index: 0 },
+        Flux3Keyframe { image_url: KEYFRAME_TWO_URL.to_string(), frame_index: 96 },
+      ],
+      duration: Some(5),
+      resolution: Some(Flux3Resolution::SevenTwentyP),
+      aspect_ratio: None,
+      generate_audio: Some(false),
+      safety_tolerance: None,
+    };
+
+    let result = request.send_queue_request(&api_key).await?;
+    println!("Queue result — request_id: {}", result.request_id);
+    assert!(!result.request_id.is_empty());
+    Ok(())
+  }
+
+  // ── Wire-shape sanity (no API calls) ──
+
+  #[test]
+  fn raw_request_maps_all_fields() {
+    let request = Flux3KeyframesToVideoRequest {
+      prompt: "p".to_string(),
+      keyframes: vec![
+        Flux3Keyframe { image_url: "https://example.com/a.png".to_string(), frame_index: 0 },
+        Flux3Keyframe { image_url: "https://example.com/b.png".to_string(), frame_index: 120 },
+      ],
+      duration: Some(10),
+      resolution: Some(Flux3Resolution::TenEightyP),
+      aspect_ratio: Some(Flux3AspectRatio::SixteenByNine),
+      generate_audio: Some(true),
+      safety_tolerance: Some(2),
+    };
+    let raw = request.to_raw_request().unwrap();
+    assert_eq!(raw.prompt, "p");
+    assert_eq!(raw.keyframes.len(), 2);
+    assert_eq!(raw.keyframes[0].image_url, "https://example.com/a.png");
+    assert_eq!(raw.keyframes[0].frame_index, 0);
+    assert_eq!(raw.keyframes[1].frame_index, 120);
+    assert_eq!(raw.duration, Some(10));
+    assert_eq!(raw.resolution.as_deref(), Some("1080p"));
+    assert_eq!(raw.aspect_ratio.as_deref(), Some("16:9"));
+  }
+
+  #[test]
+  fn raw_request_omits_unset_optionals() {
+    let request = Flux3KeyframesToVideoRequest {
+      prompt: "minimal".to_string(),
+      keyframes: vec![
+        Flux3Keyframe { image_url: "https://example.com/a.png".to_string(), frame_index: 0 },
+      ],
+      duration: None,
+      resolution: None,
+      aspect_ratio: None,
+      generate_audio: None,
+      safety_tolerance: None,
+    };
+    let json = serde_json::to_value(request.to_raw_request().unwrap()).unwrap();
+    assert_eq!(json, serde_json::json!({
+      "prompt": "minimal",
+      "keyframes": [
+        { "image_url": "https://example.com/a.png", "frame_index": 0 },
+      ],
+    }));
+  }
+
+  #[test]
+  fn endpoint_path_is_canonical() {
+    assert_eq!(Flux3KeyframesToVideoRequest::ENDPOINT, "blackforestlabs/flux-3/keyframes-to-video");
+  }
+
+  // NB: Pricing tests are in cost.rs
+}

crates/api_clients/fal_client/src/requests/api/video/keyframes/flux_3/cost.rs

@@ -0,0 +1,78 @@
+use crate::requests::api::video::keyframes::flux_3::api::Flux3KeyframesToVideoRequest;
+use crate::requests::api::video::text::flux_3::cost::{
+  flux_3_is_1080p, flux_3_standard_rate_cents_per_sec, flux_3_video_cost_cents,
+};
+use crate::requests::traits::fal_request_cost_calculator_trait::{FalRequestCostCalculator, UsdCents};
+
+// Keyframes-to-video shares the standard Flux 3 per-second pricing (see the
+// text module for the canonical rate table):
+//   720p:  $0.17/sec
+//   1080p: $0.29/sec
+// Keyframe images are free; pricing depends on resolution and duration only.
+
+impl FalRequestCostCalculator for Flux3KeyframesToVideoRequest {
+  fn calculate_cost_in_cents(&self) -> UsdCents {
+    // fal default when unset: duration = 5s.
+    let duration_secs = u64::from(self.duration.unwrap_or(5));
+    let rate = flux_3_standard_rate_cents_per_sec(flux_3_is_1080p(self.resolution));
+    flux_3_video_cost_cents(rate, duration_secs)
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+  use crate::requests::api::video::keyframes::flux_3::raw_request::Flux3Keyframe;
+  use crate::requests::api::video::text::flux_3::api::Flux3Resolution;
+
+  fn make_request(
+    duration: Option<u8>,
+    resolution: Option<Flux3Resolution>,
+    keyframe_count: u32,
+  ) -> Flux3KeyframesToVideoRequest {
+    Flux3KeyframesToVideoRequest {
+      prompt: "test".to_string(),
+      keyframes: (0..keyframe_count)
+        .map(|i| Flux3Keyframe {
+          image_url: format!("https://example.com/kf-{i}.png"),
+          frame_index: i * 24,
+        })
+        .collect(),
+      duration,
+      resolution,
+      aspect_ratio: None,
+      generate_audio: None,
+      safety_tolerance: None,
+    }
+  }
+
+  mod cost_table {
+    use super::*;
+
+    // (duration, resolution, expected_cents)
+    const COST_TABLE: &[(Option<u8>, Option<Flux3Resolution>, u64)] = &[
+      (Some(5),  Some(Flux3Resolution::SevenTwentyP), 85),
+      (Some(20), Some(Flux3Resolution::SevenTwentyP), 340),
+      (Some(5),  Some(Flux3Resolution::TenEightyP), 145),
+      (Some(20), Some(Flux3Resolution::TenEightyP), 580),
+      // Defaults: duration=None→5s, resolution=None→720p
+      (None, None, 85),
+    ];
+
+    #[test]
+    fn matches_cost_table() {
+      for &(duration, resolution, expected) in COST_TABLE {
+        let got = make_request(duration, resolution, 2).calculate_cost_in_cents();
+        assert_eq!(got, expected, "duration={duration:?} resolution={resolution:?}");
+      }
+    }
+
+    /// The number of keyframes does not affect the bill.
+    #[test]
+    fn cost_is_independent_of_keyframe_count() {
+      let one = make_request(Some(10), None, 1).calculate_cost_in_cents();
+      let ten = make_request(Some(10), None, 10).calculate_cost_in_cents();
+      assert_eq!(one, ten);
+    }
+  }
+}

crates/api_clients/fal_client/src/requests/api/video/keyframes/flux_3/mod.rs

@@ -0,0 +1,3 @@
+pub mod api;
+pub mod cost;
+pub mod raw_request;

crates/api_clients/fal_client/src/requests/api/video/keyframes/flux_3/raw_request.rs

@@ -0,0 +1,58 @@
+use serde::{Deserialize, Serialize};
+
+/// Over-the-wire input shape for `blackforestlabs/flux-3/keyframes-to-video`.
+/// fal's schema: <https://fal.ai/models/blackforestlabs/flux-3/keyframes-to-video/api>
+#[derive(Debug, Serialize, Deserialize, Default)]
+pub struct Flux3KeyframesToVideoInput {
+  /// Text prompt for video generation.
+  pub prompt: String,
+
+  /// Keyframe images pinned to frame positions (1 to 10 entries with unique
+  /// `frame_index` values).
+  pub keyframes: Vec<Flux3Keyframe>,
+
+  /// Duration in seconds (5–20). fal default: 5.
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub duration: Option<u8>,
+
+  /// Output resolution.
+  /// Possible values: "720p", "1080p". fal default: "720p".
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub resolution: Option<String>,
+
+  /// Aspect ratio.
+  /// Possible values: "auto", "21:9", "2:1", "16:9", "4:3", "1:1", "3:4",
+  /// "9:16". fal default: "auto".
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub aspect_ratio: Option<String>,
+
+  /// Whether to generate synchronized audio. fal default: true.
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub generate_audio: Option<bool>,
+
+  /// Safety tolerance, 0 (strictest) to 4 (most permissive). fal default: 2.
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub safety_tolerance: Option<u8>,
+}
+
+/// A keyframe image pinned to a frame position in the generated 24 fps video.
+/// Shared by the full-quality and draft keyframes endpoints.
+#[derive(Clone, Debug, Serialize, Deserialize, Default, Eq, PartialEq)]
+pub struct Flux3Keyframe {
+  /// URL of the keyframe image (PNG, JPEG, or WebP).
+  pub image_url: String,
+
+  /// Frame position of this keyframe in the generated 24 fps video. Must be
+  /// unique and at most `duration * 24`.
+  pub frame_index: u32,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Flux3KeyframesToVideoVideoFile {
+  pub url: String,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Flux3KeyframesToVideoOutput {
+  pub video: Flux3KeyframesToVideoVideoFile,
+}

crates/api_clients/fal_client/src/requests/api/video/keyframes/flux_3_draft/api.rs

@@ -0,0 +1,147 @@
+use crate::error::fal_error_plus::FalErrorPlus;
+use crate::requests::api::video::keyframes::flux_3::raw_request::Flux3Keyframe;
+use crate::requests::api::video::keyframes::flux_3_draft::raw_request::{
+  Flux3DraftKeyframesToVideoInput, Flux3DraftKeyframesToVideoOutput,
+};
+use crate::requests::api::video::text::flux_3::api::Flux3AspectRatio;
+use crate::requests::traits::fal_endpoint_trait::FalEndpoint;
+
+/// Flux 3 Draft keyframes-to-video: lower cost, lower fidelity (always 720p).
+/// The response includes a `draft_cache` that `draft-enhance` can upgrade to
+/// a full-quality 1080p render.
+#[derive(Clone, Debug)]
+pub struct Flux3DraftKeyframesToVideoRequest {
+  /// Text prompt for video generation.
+  pub prompt: String,
+
+  /// Keyframe images pinned to frame positions in the generated 24 fps video
+  /// (1 to 10 entries with unique `frame_index` values, each at most
+  /// `duration * 24`).
+  pub keyframes: Vec<Flux3Keyframe>,
+
+  /// Duration in seconds. Valid range 5–20; fal's default is `5` when `None`.
+  pub duration: Option<u8>,
+
+  /// Aspect ratio. fal's default is `auto` when `None`.
+  pub aspect_ratio: Option<Flux3AspectRatio>,
+
+  /// Whether to generate synchronized audio. fal's default is `true` when
+  /// `None`. Audio does not affect the bill.
+  pub generate_audio: Option<bool>,
+
+  /// Safety tolerance, 0 (strictest) to 4 (most permissive). fal's default is
+  /// `2` when `None`.
+  pub safety_tolerance: Option<u8>,
+}
+
+impl FalEndpoint for Flux3DraftKeyframesToVideoRequest {
+  const ENDPOINT: &str = "blackforestlabs/flux-3/keyframes-to-video/draft";
+
+  type RawRequest = Flux3DraftKeyframesToVideoInput;
+  type RawResponse = Flux3DraftKeyframesToVideoOutput;
+
+  fn to_raw_request(&self) -> Result<Self::RawRequest, FalErrorPlus> {
+    Ok(Self::RawRequest {
+      prompt: self.prompt.clone(),
+      keyframes: self.keyframes.clone(),
+      duration: self.duration,
+      aspect_ratio: self.aspect_ratio.map(|ar| ar.to_str().to_string()),
+      generate_audio: self.generate_audio,
+      safety_tolerance: self.safety_tolerance,
+    })
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+  use crate::creds::fal_api_key::FalApiKey;
+  use crate::requests::traits::fal_endpoint_trait::FalEndpoint;
+  use errors::AnyhowResult;
+  use std::fs::read_to_string;
+
+  const KEYFRAME_ONE_URL: &str =
+    "https://storage.googleapis.com/falserverless/example_inputs/veo31-flf2v-input-1.jpeg";
+  const KEYFRAME_TWO_URL: &str =
+    "https://storage.googleapis.com/falserverless/example_inputs/veo31-flf2v-input-2.jpeg";
+
+  // ── Real requests (manually run; require a live key and cost money) ──
+
+  #[tokio::test]
+  #[ignore] // manually run — fires a real API request and incurs cost
+  async fn test_keyframes_to_video_queue() -> AnyhowResult<()> {
+    let secret = read_to_string("/Users/bt/Artcraft/credentials/fal_api_key.txt")?;
+    let api_key = FalApiKey::from_str(&secret);
+
+    let request = Flux3DraftKeyframesToVideoRequest {
+      prompt: "the scene flows naturally between the pinned keyframes".to_string(),
+      keyframes: vec![
+        Flux3Keyframe { image_url: KEYFRAME_ONE_URL.to_string(), frame_index: 0 },
+        Flux3Keyframe { image_url: KEYFRAME_TWO_URL.to_string(), frame_index: 96 },
+      ],
+      duration: Some(5),
+      aspect_ratio: None,
+      generate_audio: Some(false),
+      safety_tolerance: None,
+    };
+
+    let result = request.send_queue_request(&api_key).await?;
+    println!("Queue result — request_id: {}", result.request_id);
+    assert!(!result.request_id.is_empty());
+    Ok(())
+  }
+
+  // ── Wire-shape sanity (no API calls) ──
+
+  #[test]
+  fn raw_request_maps_all_fields() {
+    let request = Flux3DraftKeyframesToVideoRequest {
+      prompt: "p".to_string(),
+      keyframes: vec![
+        Flux3Keyframe { image_url: "https://example.com/a.png".to_string(), frame_index: 48 },
+      ],
+      duration: Some(6),
+      aspect_ratio: Some(Flux3AspectRatio::TwentyOneByNine),
+      generate_audio: Some(false),
+      safety_tolerance: Some(0),
+    };
+    let raw = request.to_raw_request().unwrap();
+    assert_eq!(raw.prompt, "p");
+    assert_eq!(raw.keyframes.len(), 1);
+    assert_eq!(raw.keyframes[0].frame_index, 48);
+    assert_eq!(raw.duration, Some(6));
+    assert_eq!(raw.aspect_ratio.as_deref(), Some("21:9"));
+    assert_eq!(raw.generate_audio, Some(false));
+    assert_eq!(raw.safety_tolerance, Some(0));
+  }
+
+  #[test]
+  fn raw_request_omits_unset_optionals() {
+    let request = Flux3DraftKeyframesToVideoRequest {
+      prompt: "minimal".to_string(),
+      keyframes: vec![
+        Flux3Keyframe { image_url: "https://example.com/a.png".to_string(), frame_index: 0 },
+      ],
+      duration: None,
+      aspect_ratio: None,
+      generate_audio: None,
+      safety_tolerance: None,
+    };
+    let json = serde_json::to_value(request.to_raw_request().unwrap()).unwrap();
+    assert_eq!(json, serde_json::json!({
+      "prompt": "minimal",
+      "keyframes": [
+        { "image_url": "https://example.com/a.png", "frame_index": 0 },
+      ],
+    }));
+  }
+
+  #[test]
+  fn endpoint_path_is_canonical() {
+    assert_eq!(
+      Flux3DraftKeyframesToVideoRequest::ENDPOINT,
+      "blackforestlabs/flux-3/keyframes-to-video/draft");
+  }
+
+  // NB: Pricing tests are in cost.rs
+}

crates/api_clients/fal_client/src/requests/api/video/keyframes/flux_3_draft/cost.rs

@@ -0,0 +1,54 @@
+use crate::requests::api::video::keyframes::flux_3_draft::api::Flux3DraftKeyframesToVideoRequest;
+use crate::requests::api::video::text::flux_3::cost::flux_3_video_cost_cents;
+use crate::requests::api::video::text::flux_3_draft::cost::flux_3_draft_generation_rate_cents_per_sec;
+use crate::requests::traits::fal_request_cost_calculator_trait::{FalRequestCostCalculator, UsdCents};
+
+// Draft keyframes-to-video shares the Flux 3 Draft generation pricing (see
+// the draft text module for the canonical rate):
+//   $0.06 per second of generated draft video (always 720p)
+
+impl FalRequestCostCalculator for Flux3DraftKeyframesToVideoRequest {
+  fn calculate_cost_in_cents(&self) -> UsdCents {
+    // fal default when unset: duration = 5s.
+    let duration_secs = u64::from(self.duration.unwrap_or(5));
+    flux_3_video_cost_cents(flux_3_draft_generation_rate_cents_per_sec(), duration_secs)
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+  use crate::requests::api::video::keyframes::flux_3::raw_request::Flux3Keyframe;
+
+  fn make_request(duration: Option<u8>) -> Flux3DraftKeyframesToVideoRequest {
+    Flux3DraftKeyframesToVideoRequest {
+      prompt: "test".to_string(),
+      keyframes: vec![
+        Flux3Keyframe { image_url: "https://example.com/a.png".to_string(), frame_index: 0 },
+      ],
+      duration,
+      aspect_ratio: None,
+      generate_audio: None,
+      safety_tolerance: None,
+    }
+  }
+
+  mod cost_table {
+    use super::*;
+
+    // (duration, expected_cents) — 6¢ × secs; None defaults to 5s.
+    const COST_TABLE: &[(Option<u8>, u64)] = &[
+      (Some(5),  30),
+      (Some(20), 120),
+      (None, 30),
+    ];
+
+    #[test]
+    fn matches_cost_table() {
+      for &(duration, expected) in COST_TABLE {
+        let got = make_request(duration).calculate_cost_in_cents();
+        assert_eq!(got, expected, "duration={duration:?}");
+      }
+    }
+  }
+}

crates/api_clients/fal_client/src/requests/api/video/keyframes/flux_3_draft/mod.rs

@@ -0,0 +1,3 @@
+pub mod api;
+pub mod cost;
+pub mod raw_request;

crates/api_clients/fal_client/src/requests/api/video/keyframes/flux_3_draft/raw_request.rs

@@ -0,0 +1,47 @@
+use serde::{Deserialize, Serialize};
+
+use crate::requests::api::video::keyframes::flux_3::raw_request::Flux3Keyframe;
+
+/// Over-the-wire input shape for `blackforestlabs/flux-3/keyframes-to-video/draft`.
+/// fal's schema: <https://fal.ai/models/blackforestlabs/flux-3/keyframes-to-video/draft/api>
+#[derive(Debug, Serialize, Deserialize, Default)]
+pub struct Flux3DraftKeyframesToVideoInput {
+  /// Text prompt for video generation.
+  pub prompt: String,
+
+  /// Keyframe images pinned to frame positions (1 to 10 entries with unique
+  /// `frame_index` values).
+  pub keyframes: Vec<Flux3Keyframe>,
+
+  /// Duration in seconds (5–20). fal default: 5.
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub duration: Option<u8>,
+
+  /// Aspect ratio.
+  /// Possible values: "auto", "21:9", "2:1", "16:9", "4:3", "1:1", "3:4",
+  /// "9:16". fal default: "auto".
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub aspect_ratio: Option<String>,
+
+  /// Whether to generate synchronized audio. fal default: true.
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub generate_audio: Option<bool>,
+
+  /// Safety tolerance, 0 (strictest) to 4 (most permissive). fal default: 2.
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub safety_tolerance: Option<u8>,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Flux3DraftKeyframesToVideoVideoFile {
+  pub url: String,
+}
+
+/// Draft outputs carry the 720p draft video plus a durable encrypted cache
+/// bundle whose URL can be passed to `draft-enhance` for a full-quality
+/// 1080p render.
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Flux3DraftKeyframesToVideoOutput {
+  pub video: Flux3DraftKeyframesToVideoVideoFile,
+  pub draft_cache: Flux3DraftKeyframesToVideoVideoFile,
+}

crates/api_clients/fal_client/src/requests/api/video/keyframes/mod.rs

@@ -0,0 +1,2 @@
+pub mod flux_3;
+pub mod flux_3_draft;

crates/api_clients/fal_client/src/requests/api/video/mod.rs

@@ -1,6 +1,8 @@
 pub mod elements;
+pub mod enhance;
 pub mod extend;
 pub mod image;
 pub mod images;
+pub mod keyframes;
 pub mod reference;
 pub mod text;

crates/api_clients/fal_client/src/requests/api/video/reference/minimax_h3/api.rs

@@ -0,0 +1,200 @@
+use crate::error::fal_error_plus::FalErrorPlus;
+use crate::requests::api::video::reference::minimax_h3::raw_request::{
+  MinimaxH3ReferenceToVideoInput, MinimaxH3ReferenceToVideoOutput,
+};
+use crate::requests::api::video::text::minimax_h3::api::MinimaxH3Resolution;
+use crate::requests::traits::fal_endpoint_trait::FalEndpoint;
+
+#[derive(Clone, Debug)]
+pub struct MinimaxH3ReferenceToVideoRequest {
+  /// Text prompt (1 to 7000 characters). Refer to reference assets by their
+  /// modality and order in the reference lists: Image 1, Image 2, Video 1,
+  /// Audio 1, and so on.
+  pub prompt: String,
+
+  /// URLs of subject/style reference images (at most 9). Reference images,
+  /// videos, and audio clips must add up to at most 12 files.
+  pub reference_image_urls: Option<Vec<String>>,
+
+  /// URLs of motion/reference video clips (at most 3; 2–15 seconds each,
+  /// combined duration at most 15 seconds).
+  pub reference_video_urls: Option<Vec<String>>,
+
+  /// URLs of reference audio clips (at most 3; 2–15 seconds each, combined
+  /// duration at most 15 seconds). Audio cannot be the only reference input.
+  pub reference_audio_urls: Option<Vec<String>>,
+
+  /// Duration in seconds. Valid range 5–15; fal's default is `5` when `None`.
+  pub duration: Option<u8>,
+
+  /// Output resolution. fal's default is `2K` when `None`.
+  pub resolution: Option<MinimaxH3Resolution>,
+
+  /// Aspect ratio. fal's default is `adaptive` when `None`.
+  pub aspect_ratio: Option<MinimaxH3ReferenceToVideoAspectRatio>,
+}
+
+/// Reference-to-video aspect ratios. Unlike the text modality, `adaptive`
+/// (derive the ratio from the reference assets) is supported and is fal's
+/// default.
+#[derive(Copy, Clone, Debug, Eq, PartialEq)]
+pub enum MinimaxH3ReferenceToVideoAspectRatio {
+  Adaptive,
+  TwentyOneByNine,
+  SixteenByNine,
+  FourByThree,
+  Square,
+  ThreeByFour,
+  NineBySixteen,
+}
+
+impl MinimaxH3ReferenceToVideoAspectRatio {
+  fn to_str(&self) -> &'static str {
+    match self {
+      Self::Adaptive => "adaptive",
+      Self::TwentyOneByNine => "21:9",
+      Self::SixteenByNine => "16:9",
+      Self::FourByThree => "4:3",
+      Self::Square => "1:1",
+      Self::ThreeByFour => "3:4",
+      Self::NineBySixteen => "9:16",
+    }
+  }
+}
+
+impl FalEndpoint for MinimaxH3ReferenceToVideoRequest {
+  const ENDPOINT: &str = "minimax/h3/reference-to-video";
+
+  type RawRequest = MinimaxH3ReferenceToVideoInput;
+  type RawResponse = MinimaxH3ReferenceToVideoOutput;
+
+  fn to_raw_request(&self) -> Result<Self::RawRequest, FalErrorPlus> {
+    Ok(Self::RawRequest {
+      prompt: self.prompt.clone(),
+      reference_image_urls: self.reference_image_urls.clone(),
+      reference_video_urls: self.reference_video_urls.clone(),
+      reference_audio_urls: self.reference_audio_urls.clone(),
+      duration: self.duration,
+      resolution: self.resolution.map(|r| r.to_str().to_string()),
+      aspect_ratio: self.aspect_ratio.map(|ar| ar.to_str().to_string()),
+    })
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+  use crate::creds::fal_api_key::FalApiKey;
+  use crate::requests::traits::fal_endpoint_trait::FalEndpoint;
+  use errors::AnyhowResult;
+  use std::fs::read_to_string;
+
+  const EXAMPLE_IMAGE_URL: &str =
+    "https://storage.googleapis.com/falserverless/example_inputs/hailuo23/pro_i2v_in.jpg";
+
+  // ── Real requests (manually run; require a live key and cost money) ──
+
+  #[tokio::test]
+  #[ignore] // manually run — fires a real API request and incurs cost
+  async fn test_reference_to_video_webhook() -> AnyhowResult<()> {
+    let secret = read_to_string("/Users/bt/Artcraft/credentials/fal_api_key.txt")?;
+    let api_key = FalApiKey::from_str(&secret);
+
+    let request = MinimaxH3ReferenceToVideoRequest {
+      prompt: "Image 1 is the subject. Keep the subject consistent while the camera slowly orbits.".to_string(),
+      reference_image_urls: Some(vec![EXAMPLE_IMAGE_URL.to_string()]),
+      reference_video_urls: None,
+      reference_audio_urls: None,
+      duration: Some(5),
+      resolution: Some(MinimaxH3Resolution::SevenSixtyEightP),
+      aspect_ratio: Some(MinimaxH3ReferenceToVideoAspectRatio::Adaptive),
+    };
+
+    let result = request.send_webhook_request(&api_key, "https://example.com/webhook").await?;
+    println!("Webhook result: {:?}", result);
+    assert!(result.request_id.is_some() || result.gateway_request_id.is_some());
+    Ok(())
+  }
+
+  #[tokio::test]
+  #[ignore] // manually run — fires a real API request and incurs cost
+  async fn test_reference_to_video_queue() -> AnyhowResult<()> {
+    let secret = read_to_string("/Users/bt/Artcraft/credentials/fal_api_key.txt")?;
+    let api_key = FalApiKey::from_str(&secret);
+
+    let request = MinimaxH3ReferenceToVideoRequest {
+      prompt: "Image 1 is the subject. The subject walks through a sunlit garden.".to_string(),
+      reference_image_urls: Some(vec![EXAMPLE_IMAGE_URL.to_string()]),
+      reference_video_urls: None,
+      reference_audio_urls: None,
+      duration: Some(5),
+      resolution: Some(MinimaxH3Resolution::SevenSixtyEightP),
+      aspect_ratio: None,
+    };
+
+    let result = request.send_queue_request(&api_key).await?;
+    println!("Queue result — request_id: {}", result.request_id);
+    assert!(!result.request_id.is_empty());
+    Ok(())
+  }
+
+  // ── Wire-shape sanity (no API calls) ──
+
+  #[test]
+  fn raw_request_maps_all_fields() {
+    let request = MinimaxH3ReferenceToVideoRequest {
+      prompt: "p".to_string(),
+      reference_image_urls: Some(vec!["https://example.com/a.png".to_string()]),
+      reference_video_urls: Some(vec!["https://example.com/b.mp4".to_string()]),
+      reference_audio_urls: Some(vec!["https://example.com/c.mp3".to_string()]),
+      duration: Some(12),
+      resolution: Some(MinimaxH3Resolution::TwoK),
+      aspect_ratio: Some(MinimaxH3ReferenceToVideoAspectRatio::Adaptive),
+    };
+    let raw = request.to_raw_request().unwrap();
+    assert_eq!(raw.prompt, "p");
+    assert_eq!(raw.reference_image_urls.as_deref(), Some(&["https://example.com/a.png".to_string()][..]));
+    assert_eq!(raw.reference_video_urls.as_deref(), Some(&["https://example.com/b.mp4".to_string()][..]));
+    assert_eq!(raw.reference_audio_urls.as_deref(), Some(&["https://example.com/c.mp3".to_string()][..]));
+    assert_eq!(raw.duration, Some(12));
+    assert_eq!(raw.resolution.as_deref(), Some("2K"));
+    assert_eq!(raw.aspect_ratio.as_deref(), Some("adaptive"));
+  }
+
+  #[test]
+  fn raw_request_omits_unset_optionals() {
+    let request = MinimaxH3ReferenceToVideoRequest {
+      prompt: "minimal".to_string(),
+      reference_image_urls: None,
+      reference_video_urls: None,
+      reference_audio_urls: None,
+      duration: None,
+      resolution: None,
+      aspect_ratio: None,
+    };
+    let json = serde_json::to_value(request.to_raw_request().unwrap()).unwrap();
+    assert_eq!(json, serde_json::json!({ "prompt": "minimal" }));
+  }
+
+  #[test]
+  fn every_aspect_ratio_maps_to_wire_string() {
+    for (variant, expected) in [
+      (MinimaxH3ReferenceToVideoAspectRatio::Adaptive, "adaptive"),
+      (MinimaxH3ReferenceToVideoAspectRatio::TwentyOneByNine, "21:9"),
+      (MinimaxH3ReferenceToVideoAspectRatio::SixteenByNine, "16:9"),
+      (MinimaxH3ReferenceToVideoAspectRatio::FourByThree, "4:3"),
+      (MinimaxH3ReferenceToVideoAspectRatio::Square, "1:1"),
+      (MinimaxH3ReferenceToVideoAspectRatio::ThreeByFour, "3:4"),
+      (MinimaxH3ReferenceToVideoAspectRatio::NineBySixteen, "9:16"),
+    ] {
+      assert_eq!(variant.to_str(), expected);
+    }
+  }
+
+  #[test]
+  fn endpoint_path_is_canonical() {
+    assert_eq!(MinimaxH3ReferenceToVideoRequest::ENDPOINT, "minimax/h3/reference-to-video");
+  }
+
+  // NB: Pricing tests are in cost.rs
+}

crates/api_clients/fal_client/src/requests/api/video/reference/minimax_h3/cost.rs

@@ -0,0 +1,127 @@
+use crate::requests::api::video::reference::minimax_h3::api::MinimaxH3ReferenceToVideoRequest;
+use crate::requests::api::video::text::minimax_h3::api::MinimaxH3Resolution;
+use crate::requests::api::video::text::minimax_h3::cost::{
+  minimax_h3_rate_cents_per_sec, minimax_h3_video_cost_cents,
+};
+use crate::requests::traits::fal_request_cost_calculator_trait::{FalRequestCostCalculator, UsdCents};
+
+// Reference-to-video shares the MiniMax H3 per-second pricing (see the text
+// module for the canonical rate table):
+//   768P: $0.16/sec
+//   2K:   $0.26/sec
+// On top of that, the first 5 reference images are free and each additional
+// image costs $0.08. Reference videos and audio clips are free.
+const FREE_REFERENCE_IMAGES: u64 = 5;
+const EXTRA_REFERENCE_IMAGE_CENTS: u64 = 8; // $0.08 per image beyond the first 5
+
+impl FalRequestCostCalculator for MinimaxH3ReferenceToVideoRequest {
+  fn calculate_cost_in_cents(&self) -> UsdCents {
+    // fal defaults when unset: duration = 5s, resolution = 2K.
+    let duration_secs = u64::from(self.duration.unwrap_or(5));
+    let is_2k = self.resolution
+      .unwrap_or(MinimaxH3Resolution::TwoK)
+      .is_2k();
+
+    let rate = minimax_h3_rate_cents_per_sec(is_2k);
+    let video_cents = minimax_h3_video_cost_cents(rate, duration_secs);
+
+    let image_count = self.reference_image_urls.as_ref().map_or(0, |urls| urls.len() as u64);
+    let extra_image_cents = image_count.saturating_sub(FREE_REFERENCE_IMAGES)
+      * EXTRA_REFERENCE_IMAGE_CENTS;
+
+    video_cents + extra_image_cents
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+
+  fn make_request(
+    duration: Option<u8>,
+    resolution: Option<MinimaxH3Resolution>,
+    image_count: usize,
+  ) -> MinimaxH3ReferenceToVideoRequest {
+    let images = (0..image_count)
+      .map(|i| format!("https://example.com/ref_{i}.png"))
+      .collect::<Vec<String>>();
+    MinimaxH3ReferenceToVideoRequest {
+      prompt: "test".to_string(),
+      reference_image_urls: if images.is_empty() { None } else { Some(images) },
+      reference_video_urls: None,
+      reference_audio_urls: None,
+      duration,
+      resolution,
+      aspect_ratio: None,
+    }
+  }
+
+  mod cost_table {
+    use super::*;
+
+    // (duration, resolution, image_count, expected_cents)
+    // Math: rate × secs + 8¢ × max(0, images − 5), where rate (cents) = 16
+    // (768P) or 26 (2K).
+    const COST_TABLE: &[(Option<u8>, Option<MinimaxH3Resolution>, usize, u64)] = &[
+      // 768P → $0.16/s; up to 5 reference images are free
+      (Some(5),  Some(MinimaxH3Resolution::SevenSixtyEightP), 0, 80),
+      (Some(5),  Some(MinimaxH3Resolution::SevenSixtyEightP), 1, 80),
+      (Some(5),  Some(MinimaxH3Resolution::SevenSixtyEightP), 5, 80),
+      (Some(15), Some(MinimaxH3Resolution::SevenSixtyEightP), 5, 240),
+      // 2K → $0.26/s
+      (Some(5),  Some(MinimaxH3Resolution::TwoK), 5, 130),
+      (Some(15), Some(MinimaxH3Resolution::TwoK), 5, 390),
+      // Each image beyond the 5th adds 8¢
+      (Some(5), Some(MinimaxH3Resolution::SevenSixtyEightP), 6, 88),
+      (Some(5), Some(MinimaxH3Resolution::SevenSixtyEightP), 9, 112), // 80 + 4×8
+      (Some(5), Some(MinimaxH3Resolution::TwoK), 6, 138),
+      (Some(5), Some(MinimaxH3Resolution::TwoK), 9, 162), // 130 + 4×8
+      // Defaults: duration=None→5s, resolution=None→2K
+      (None, None, 0, 130),
+      (None, None, 9, 162),
+    ];
+
+    #[test]
+    fn matches_cost_table() {
+      for &(duration, resolution, image_count, expected) in COST_TABLE {
+        let got = make_request(duration, resolution, image_count).calculate_cost_in_cents();
+        assert_eq!(
+          got, expected,
+          "duration={duration:?} resolution={resolution:?} images={image_count}");
+      }
+    }
+
+    #[test]
+    fn first_five_images_are_free() {
+      let none = make_request(Some(5), Some(MinimaxH3Resolution::TwoK), 0).calculate_cost_in_cents();
+      for image_count in 1..=5 {
+        let cost = make_request(Some(5), Some(MinimaxH3Resolution::TwoK), image_count).calculate_cost_in_cents();
+        assert_eq!(cost, none, "images={image_count} should not change the bill");
+      }
+    }
+
+    #[test]
+    fn each_extra_image_adds_eight_cents() {
+      let five = make_request(Some(5), Some(MinimaxH3Resolution::TwoK), 5).calculate_cost_in_cents();
+      for (image_count, extra) in [(6, 8), (7, 16), (8, 24), (9, 32)] {
+        let cost = make_request(Some(5), Some(MinimaxH3Resolution::TwoK), image_count).calculate_cost_in_cents();
+        assert_eq!(cost, five + extra, "images={image_count}");
+      }
+    }
+
+    /// Reference videos and audio clips do not affect the bill.
+    #[test]
+    fn cost_ignores_reference_videos_and_audio() {
+      let baseline = make_request(Some(5), Some(MinimaxH3Resolution::TwoK), 2).calculate_cost_in_cents();
+      let with_extras = MinimaxH3ReferenceToVideoRequest {
+        reference_video_urls: Some(vec![
+          "https://example.com/a.mp4".to_string(),
+          "https://example.com/b.mp4".to_string(),
+        ]),
+        reference_audio_urls: Some(vec!["https://example.com/a.mp3".to_string()]),
+        ..make_request(Some(5), Some(MinimaxH3Resolution::TwoK), 2)
+      }.calculate_cost_in_cents();
+      assert_eq!(with_extras, baseline);
+    }
+  }
+}

crates/api_clients/fal_client/src/requests/api/video/reference/minimax_h3/mod.rs

@@ -0,0 +1,3 @@
+pub mod api;
+pub mod cost;
+pub mod raw_request;

crates/api_clients/fal_client/src/requests/api/video/reference/minimax_h3/raw_request.rs

@@ -0,0 +1,51 @@
+use serde::{Deserialize, Serialize};
+
+/// Over-the-wire input shape for `minimax/h3/reference-to-video`.
+/// fal's schema: <https://fal.ai/models/minimax/h3/reference-to-video/api>
+#[derive(Debug, Serialize, Deserialize, Default)]
+pub struct MinimaxH3ReferenceToVideoInput {
+  /// Text prompt (1 to 7000 characters). Refer to reference assets by their
+  /// modality and order in the reference lists: Image 1, Image 2, Video 1,
+  /// Audio 1, and so on.
+  pub prompt: String,
+
+  /// URLs of subject/style reference images (at most 9). Reference images,
+  /// videos, and audio clips must add up to at most 12 files.
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub reference_image_urls: Option<Vec<String>>,
+
+  /// URLs of motion/reference video clips (at most 3; 2–15 seconds each,
+  /// combined duration at most 15 seconds).
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub reference_video_urls: Option<Vec<String>>,
+
+  /// URLs of reference audio clips (at most 3; 2–15 seconds each, combined
+  /// duration at most 15 seconds). Audio cannot be the only reference input.
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub reference_audio_urls: Option<Vec<String>>,
+
+  /// Duration in seconds. Range 5–15. fal default: 5.
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub duration: Option<u8>,
+
+  /// Output resolution.
+  /// Possible values: "768P", "2K". fal default: "2K".
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub resolution: Option<String>,
+
+  /// Aspect ratio.
+  /// Possible values: "adaptive", "21:9", "16:9", "4:3", "1:1", "3:4", "9:16".
+  /// fal default: "adaptive".
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub aspect_ratio: Option<String>,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct MinimaxH3ReferenceToVideoVideoFile {
+  pub url: String,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct MinimaxH3ReferenceToVideoOutput {
+  pub video: MinimaxH3ReferenceToVideoVideoFile,
+}

crates/api_clients/fal_client/src/requests/api/video/reference/mod.rs

@@ -1,3 +1,4 @@
+pub mod minimax_h3;
 pub mod veo_3p1;
 pub mod veo_3p1_fast;
 pub mod vidu_q3_reference_to_video;

crates/api_clients/fal_client/src/requests/api/video/text/flux_3/api.rs

@@ -0,0 +1,294 @@
+use std::fmt;
+
+use serde::de::{self, Visitor};
+use serde::{Deserialize, Deserializer, Serialize, Serializer};
+
+use crate::error::fal_error_plus::FalErrorPlus;
+use crate::requests::api::video::text::flux_3::raw_request::{
+  Flux3TextToVideoInput, Flux3TextToVideoOutput,
+};
+use crate::requests::traits::fal_endpoint_trait::FalEndpoint;
+
+#[derive(Clone, Debug)]
+pub struct Flux3TextToVideoRequest {
+  /// Text prompt for video generation.
+  pub prompt: String,
+
+  /// Duration in seconds. fal's default is `auto` when `None` (the model
+  /// picks a duration that fits the prompt).
+  pub duration: Option<Flux3Duration>,
+
+  /// Output resolution. fal's default is `720p` when `None`.
+  pub resolution: Option<Flux3Resolution>,
+
+  /// Aspect ratio. fal's default is `auto` when `None`.
+  pub aspect_ratio: Option<Flux3AspectRatio>,
+
+  /// Whether to generate synchronized audio. fal's default is `true` when
+  /// `None`. Audio does not affect the bill.
+  pub generate_audio: Option<bool>,
+
+  /// Safety tolerance, 0 (strictest) to 4 (most permissive). fal's default is
+  /// `2` when `None`.
+  pub safety_tolerance: Option<u8>,
+}
+
+/// Flux 3 durations: either `auto` (the model decides) or a whole number of
+/// seconds in 5–20. Serializes as the string `"auto"` or a bare integer.
+/// Shared by every Flux 3 / Flux 3 Draft video modality.
+#[derive(Copy, Clone, Debug, Eq, PartialEq)]
+pub enum Flux3Duration {
+  Auto,
+  Seconds(u8),
+}
+
+/// Flux 3 resolutions. 1080p bills at a higher per-second rate than 720p (see
+/// the cost modules). Draft endpoints always render 720p and take no
+/// resolution input. Shared by every full-quality Flux 3 video modality.
+#[derive(Copy, Clone, Debug, Eq, PartialEq)]
+pub enum Flux3Resolution {
+  SevenTwentyP,
+  TenEightyP,
+}
+
+/// Flux 3 aspect ratios. `auto` derives the ratio from the inputs (or the
+/// prompt for text-to-video). Shared by every Flux 3 / Flux 3 Draft video
+/// modality.
+#[derive(Copy, Clone, Debug, Eq, PartialEq)]
+pub enum Flux3AspectRatio {
+  Auto,
+  TwentyOneByNine,
+  TwoByOne,
+  SixteenByNine,
+  FourByThree,
+  Square,
+  ThreeByFour,
+  NineBySixteen,
+}
+
+impl Serialize for Flux3Duration {
+  fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
+    match self {
+      Self::Auto => serializer.serialize_str("auto"),
+      Self::Seconds(seconds) => serializer.serialize_u8(*seconds),
+    }
+  }
+}
+
+impl<'de> Deserialize<'de> for Flux3Duration {
+  fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
+    struct Flux3DurationVisitor;
+
+    impl Visitor<'_> for Flux3DurationVisitor {
+      type Value = Flux3Duration;
+
+      fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+        formatter.write_str("the string \"auto\" or an integer number of seconds")
+      }
+
+      fn visit_str<E: de::Error>(self, value: &str) -> Result<Flux3Duration, E> {
+        if value == "auto" {
+          Ok(Flux3Duration::Auto)
+        } else {
+          Err(E::invalid_value(de::Unexpected::Str(value), &self))
+        }
+      }
+
+      fn visit_u64<E: de::Error>(self, value: u64) -> Result<Flux3Duration, E> {
+        u8::try_from(value)
+          .map(Flux3Duration::Seconds)
+          .map_err(|_| E::invalid_value(de::Unexpected::Unsigned(value), &self))
+      }
+
+      fn visit_i64<E: de::Error>(self, value: i64) -> Result<Flux3Duration, E> {
+        u8::try_from(value)
+          .map(Flux3Duration::Seconds)
+          .map_err(|_| E::invalid_value(de::Unexpected::Signed(value), &self))
+      }
+    }
+
+    deserializer.deserialize_any(Flux3DurationVisitor)
+  }
+}
+
+impl Flux3Resolution {
+  /// 1080p is billed at the higher per-second rate.
+  pub fn is_1080p(&self) -> bool {
+    matches!(self, Self::TenEightyP)
+  }
+
+  pub(crate) fn to_str(&self) -> &'static str {
+    match self {
+      Self::SevenTwentyP => "720p",
+      Self::TenEightyP => "1080p",
+    }
+  }
+}
+
+impl Flux3AspectRatio {
+  pub(crate) fn to_str(&self) -> &'static str {
+    match self {
+      Self::Auto => "auto",
+      Self::TwentyOneByNine => "21:9",
+      Self::TwoByOne => "2:1",
+      Self::SixteenByNine => "16:9",
+      Self::FourByThree => "4:3",
+      Self::Square => "1:1",
+      Self::ThreeByFour => "3:4",
+      Self::NineBySixteen => "9:16",
+    }
+  }
+}
+
+impl FalEndpoint for Flux3TextToVideoRequest {
+  const ENDPOINT: &str = "blackforestlabs/flux-3/text-to-video";
+
+  type RawRequest = Flux3TextToVideoInput;
+  type RawResponse = Flux3TextToVideoOutput;
+
+  fn to_raw_request(&self) -> Result<Self::RawRequest, FalErrorPlus> {
+    Ok(Self::RawRequest {
+      prompt: self.prompt.clone(),
+      duration: self.duration,
+      resolution: self.resolution.map(|r| r.to_str().to_string()),
+      aspect_ratio: self.aspect_ratio.map(|ar| ar.to_str().to_string()),
+      generate_audio: self.generate_audio,
+      safety_tolerance: self.safety_tolerance,
+    })
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+  use crate::creds::fal_api_key::FalApiKey;
+  use crate::requests::traits::fal_endpoint_trait::FalEndpoint;
+  use errors::AnyhowResult;
+  use std::fs::read_to_string;
+
+  // ── Real requests (manually run; require a live key and cost money) ──
+
+  #[tokio::test]
+  #[ignore] // manually run — fires a real API request and incurs cost
+  async fn test_text_to_video_webhook() -> AnyhowResult<()> {
+    let secret = read_to_string("/Users/bt/Artcraft/credentials/fal_api_key.txt")?;
+    let api_key = FalApiKey::from_str(&secret);
+
+    let request = Flux3TextToVideoRequest {
+      prompt: "a white kitten chases a butterfly across a sunlit garden".to_string(),
+      duration: Some(Flux3Duration::Seconds(5)),
+      resolution: Some(Flux3Resolution::SevenTwentyP),
+      aspect_ratio: Some(Flux3AspectRatio::SixteenByNine),
+      generate_audio: Some(false),
+      safety_tolerance: None,
+    };
+
+    let result = request.send_webhook_request(&api_key, "https://example.com/webhook").await?;
+    println!("Webhook result: {:?}", result);
+    assert!(result.request_id.is_some() || result.gateway_request_id.is_some());
+    Ok(())
+  }
+
+  #[tokio::test]
+  #[ignore] // manually run — fires a real API request and incurs cost
+  async fn test_text_to_video_queue() -> AnyhowResult<()> {
+    let secret = read_to_string("/Users/bt/Artcraft/credentials/fal_api_key.txt")?;
+    let api_key = FalApiKey::from_str(&secret);
+
+    let request = Flux3TextToVideoRequest {
+      prompt: "a wave crashes against a rocky shoreline at sunset".to_string(),
+      duration: Some(Flux3Duration::Seconds(5)),
+      resolution: Some(Flux3Resolution::SevenTwentyP),
+      aspect_ratio: Some(Flux3AspectRatio::SixteenByNine),
+      generate_audio: Some(false),
+      safety_tolerance: None,
+    };
+
+    let result = request.send_queue_request(&api_key).await?;
+    println!("Queue result — request_id: {}", result.request_id);
+    assert!(!result.request_id.is_empty());
+    Ok(())
+  }
+
+  // ── Wire-shape sanity (no API calls) ──
+
+  #[test]
+  fn raw_request_maps_all_fields() {
+    let request = Flux3TextToVideoRequest {
+      prompt: "p".to_string(),
+      duration: Some(Flux3Duration::Seconds(12)),
+      resolution: Some(Flux3Resolution::TenEightyP),
+      aspect_ratio: Some(Flux3AspectRatio::TwoByOne),
+      generate_audio: Some(false),
+      safety_tolerance: Some(4),
+    };
+    let raw = request.to_raw_request().unwrap();
+    assert_eq!(raw.prompt, "p");
+    assert_eq!(raw.duration, Some(Flux3Duration::Seconds(12)));
+    assert_eq!(raw.resolution.as_deref(), Some("1080p"));
+    assert_eq!(raw.aspect_ratio.as_deref(), Some("2:1"));
+    assert_eq!(raw.generate_audio, Some(false));
+    assert_eq!(raw.safety_tolerance, Some(4));
+  }
+
+  #[test]
+  fn raw_request_omits_unset_optionals() {
+    let request = Flux3TextToVideoRequest {
+      prompt: "minimal".to_string(),
+      duration: None,
+      resolution: None,
+      aspect_ratio: None,
+      generate_audio: None,
+      safety_tolerance: None,
+    };
+    let json = serde_json::to_value(request.to_raw_request().unwrap()).unwrap();
+    assert_eq!(json, serde_json::json!({ "prompt": "minimal" }));
+  }
+
+  #[test]
+  fn duration_serializes_as_auto_string_or_bare_integer() {
+    assert_eq!(serde_json::to_value(Flux3Duration::Auto).unwrap(), serde_json::json!("auto"));
+    assert_eq!(serde_json::to_value(Flux3Duration::Seconds(12)).unwrap(), serde_json::json!(12));
+  }
+
+  #[test]
+  fn duration_deserializes_from_auto_string_or_integer() {
+    assert_eq!(serde_json::from_value::<Flux3Duration>(serde_json::json!("auto")).unwrap(), Flux3Duration::Auto);
+    assert_eq!(serde_json::from_value::<Flux3Duration>(serde_json::json!(7)).unwrap(), Flux3Duration::Seconds(7));
+    assert!(serde_json::from_value::<Flux3Duration>(serde_json::json!("fast")).is_err());
+  }
+
+  #[test]
+  fn every_resolution_maps_to_wire_string() {
+    for (variant, expected, is_1080p) in [
+      (Flux3Resolution::SevenTwentyP, "720p", false),
+      (Flux3Resolution::TenEightyP, "1080p", true),
+    ] {
+      assert_eq!(variant.to_str(), expected);
+      assert_eq!(variant.is_1080p(), is_1080p);
+    }
+  }
+
+  #[test]
+  fn every_aspect_ratio_maps_to_wire_string() {
+    for (variant, expected) in [
+      (Flux3AspectRatio::Auto, "auto"),
+      (Flux3AspectRatio::TwentyOneByNine, "21:9"),
+      (Flux3AspectRatio::TwoByOne, "2:1"),
+      (Flux3AspectRatio::SixteenByNine, "16:9"),
+      (Flux3AspectRatio::FourByThree, "4:3"),
+      (Flux3AspectRatio::Square, "1:1"),
+      (Flux3AspectRatio::ThreeByFour, "3:4"),
+      (Flux3AspectRatio::NineBySixteen, "9:16"),
+    ] {
+      assert_eq!(variant.to_str(), expected);
+    }
+  }
+
+  #[test]
+  fn endpoint_path_is_canonical() {
+    assert_eq!(Flux3TextToVideoRequest::ENDPOINT, "blackforestlabs/flux-3/text-to-video");
+  }
+
+  // NB: Pricing tests are in cost.rs
+}

crates/api_clients/fal_client/src/requests/api/video/text/flux_3/cost.rs

@@ -0,0 +1,136 @@
+use crate::requests::api::video::text::flux_3::api::{
+  Flux3Duration, Flux3Resolution, Flux3TextToVideoRequest,
+};
+use crate::requests::traits::fal_request_cost_calculator_trait::{FalRequestCostCalculator, UsdCents};
+
+// Flux 3 pricing (see https://fal.ai/models/blackforestlabs/flux-3/text-to-video):
+//   720p:  $0.17 per second of generated video
+//   1080p: $0.29 per second of generated video
+//
+// The same rates apply to the image-to-video, first-last-frame-to-video, and
+// keyframes-to-video modalities (extend-video bills higher; see its cost
+// module). Audio, aspect ratio, and safety tolerance are free. Both rates are
+// exact whole cents.
+const RATE_720P_CENTS_PER_SEC: u64 = 17; // $0.17/sec
+const RATE_1080P_CENTS_PER_SEC: u64 = 29; // $0.29/sec
+
+/// Duration assumed by cost estimates when the request leaves duration unset
+/// or `auto` — fal bills the actual generated seconds, and 5s (the shortest
+/// selectable duration) is the quotable floor.
+const ASSUMED_AUTO_DURATION_SECS: u64 = 5;
+
+/// Per-second rate in whole cents for the standard (non-extend) Flux 3
+/// modalities. `is_1080p` selects the 1080p tier.
+pub(crate) fn flux_3_standard_rate_cents_per_sec(is_1080p: bool) -> u64 {
+  if is_1080p { RATE_1080P_CENTS_PER_SEC } else { RATE_720P_CENTS_PER_SEC }
+}
+
+/// Per-second rate × duration → whole cents (all Flux 3 rates are exact
+/// cents, so no rounding is needed).
+pub(crate) fn flux_3_video_cost_cents(rate_cents_per_sec: u64, duration_secs: u64) -> UsdCents {
+  rate_cents_per_sec * duration_secs
+}
+
+/// Billable seconds for a flexible (`auto`-capable) duration. `None` and
+/// `Auto` estimate at the 5-second floor.
+pub(crate) fn flux_3_estimated_duration_secs(duration: Option<Flux3Duration>) -> u64 {
+  match duration {
+    None | Some(Flux3Duration::Auto) => ASSUMED_AUTO_DURATION_SECS,
+    Some(Flux3Duration::Seconds(seconds)) => u64::from(seconds),
+  }
+}
+
+/// Whether an optional resolution lands on the 1080p tier (fal defaults to
+/// 720p when unset).
+pub(crate) fn flux_3_is_1080p(resolution: Option<Flux3Resolution>) -> bool {
+  resolution.map_or(false, |r| r.is_1080p())
+}
+
+impl FalRequestCostCalculator for Flux3TextToVideoRequest {
+  fn calculate_cost_in_cents(&self) -> UsdCents {
+    let duration_secs = flux_3_estimated_duration_secs(self.duration);
+    let rate = flux_3_standard_rate_cents_per_sec(flux_3_is_1080p(self.resolution));
+    flux_3_video_cost_cents(rate, duration_secs)
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+  use crate::requests::api::video::text::flux_3::api::Flux3AspectRatio;
+
+  fn make_request(
+    duration: Option<Flux3Duration>,
+    resolution: Option<Flux3Resolution>,
+  ) -> Flux3TextToVideoRequest {
+    Flux3TextToVideoRequest {
+      prompt: "test".to_string(),
+      duration,
+      resolution,
+      aspect_ratio: Some(Flux3AspectRatio::SixteenByNine),
+      generate_audio: Some(true),
+      safety_tolerance: None,
+    }
+  }
+
+  mod cost_table {
+    use super::*;
+
+    // (duration, resolution, expected_cents)
+    // Math: rate × secs where rate (cents) = 17 (720p) or 29 (1080p);
+    // None/auto durations are estimated at the 5s floor.
+    const COST_TABLE: &[(Option<Flux3Duration>, Option<Flux3Resolution>, u64)] = &[
+      // 720p → $0.17/s
+      (Some(Flux3Duration::Seconds(5)),  Some(Flux3Resolution::SevenTwentyP), 85),
+      (Some(Flux3Duration::Seconds(10)), Some(Flux3Resolution::SevenTwentyP), 170),
+      (Some(Flux3Duration::Seconds(20)), Some(Flux3Resolution::SevenTwentyP), 340),
+      // 1080p → $0.29/s
+      (Some(Flux3Duration::Seconds(5)),  Some(Flux3Resolution::TenEightyP), 145),
+      (Some(Flux3Duration::Seconds(20)), Some(Flux3Resolution::TenEightyP), 580),
+      // Defaults: duration=None/auto→5s estimate, resolution=None→720p
+      (None, None, 85),
+      (Some(Flux3Duration::Auto), None, 85),
+      (Some(Flux3Duration::Auto), Some(Flux3Resolution::TenEightyP), 145),
+      (None, Some(Flux3Resolution::TenEightyP), 145),
+    ];
+
+    #[test]
+    fn matches_cost_table() {
+      for &(duration, resolution, expected) in COST_TABLE {
+        let got = make_request(duration, resolution).calculate_cost_in_cents();
+        assert_eq!(got, expected, "duration={duration:?} resolution={resolution:?}");
+      }
+    }
+
+    #[test]
+    fn ten_eighty_p_is_more_expensive_than_720p() {
+      let low = make_request(Some(Flux3Duration::Seconds(8)), Some(Flux3Resolution::SevenTwentyP)).calculate_cost_in_cents();
+      let high = make_request(Some(Flux3Duration::Seconds(8)), Some(Flux3Resolution::TenEightyP)).calculate_cost_in_cents();
+      assert!(high > low, "1080p={high}¢ should exceed 720p={low}¢");
+    }
+
+    #[test]
+    fn cost_scales_linearly_with_duration() {
+      let five = make_request(Some(Flux3Duration::Seconds(5)), None).calculate_cost_in_cents();
+      let ten = make_request(Some(Flux3Duration::Seconds(10)), None).calculate_cost_in_cents();
+      assert_eq!(ten, five * 2);
+    }
+
+    /// Audio, aspect ratio, and safety tolerance do not affect the bill.
+    #[test]
+    fn cost_ignores_audio_aspect_ratio_and_safety_tolerance() {
+      let baseline = make_request(Some(Flux3Duration::Seconds(8)), None).calculate_cost_in_cents();
+      for generate_audio in [None, Some(false), Some(true)] {
+        for safety_tolerance in [None, Some(0), Some(4)] {
+          let cost = Flux3TextToVideoRequest {
+            aspect_ratio: Some(Flux3AspectRatio::NineBySixteen),
+            generate_audio,
+            safety_tolerance,
+            ..make_request(Some(Flux3Duration::Seconds(8)), None)
+          }.calculate_cost_in_cents();
+          assert_eq!(cost, baseline, "audio={generate_audio:?} safety={safety_tolerance:?}");
+        }
+      }
+    }
+  }
+}

crates/api_clients/fal_client/src/requests/api/video/text/flux_3/mod.rs

@@ -0,0 +1,3 @@
+pub mod api;
+pub mod cost;
+pub mod raw_request;

crates/api_clients/fal_client/src/requests/api/video/text/flux_3/raw_request.rs

@@ -0,0 +1,45 @@
+use serde::{Deserialize, Serialize};
+
+use crate::requests::api::video::text::flux_3::api::Flux3Duration;
+
+/// Over-the-wire input shape for `blackforestlabs/flux-3/text-to-video`.
+/// fal's schema: <https://fal.ai/models/blackforestlabs/flux-3/text-to-video/api>
+#[derive(Debug, Serialize, Deserialize, Default)]
+pub struct Flux3TextToVideoInput {
+  /// Text prompt for video generation.
+  pub prompt: String,
+
+  /// Duration in seconds ("auto" or 5–20). fal default: "auto" (the model
+  /// picks a duration that fits the prompt).
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub duration: Option<Flux3Duration>,
+
+  /// Output resolution.
+  /// Possible values: "720p", "1080p". fal default: "720p".
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub resolution: Option<String>,
+
+  /// Aspect ratio.
+  /// Possible values: "auto", "21:9", "2:1", "16:9", "4:3", "1:1", "3:4",
+  /// "9:16". fal default: "auto".
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub aspect_ratio: Option<String>,
+
+  /// Whether to generate synchronized audio. fal default: true.
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub generate_audio: Option<bool>,
+
+  /// Safety tolerance, 0 (strictest) to 4 (most permissive). fal default: 2.
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub safety_tolerance: Option<u8>,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Flux3VideoFile {
+  pub url: String,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Flux3TextToVideoOutput {
+  pub video: Flux3VideoFile,
+}

crates/api_clients/fal_client/src/requests/api/video/text/flux_3_draft/api.rs

@@ -0,0 +1,149 @@
+use crate::error::fal_error_plus::FalErrorPlus;
+use crate::requests::api::video::text::flux_3::api::{Flux3AspectRatio, Flux3Duration};
+use crate::requests::api::video::text::flux_3_draft::raw_request::{
+  Flux3DraftTextToVideoInput, Flux3DraftTextToVideoOutput,
+};
+use crate::requests::traits::fal_endpoint_trait::FalEndpoint;
+
+/// Flux 3 Draft text-to-video: lower cost, lower fidelity (always 720p). The
+/// response includes a `draft_cache` that `draft-enhance` can upgrade to a
+/// full-quality 1080p render.
+#[derive(Clone, Debug)]
+pub struct Flux3DraftTextToVideoRequest {
+  /// Text prompt for video generation.
+  pub prompt: String,
+
+  /// Duration in seconds. fal's default is `auto` when `None` (the model
+  /// picks a duration that fits the prompt).
+  pub duration: Option<Flux3Duration>,
+
+  /// Aspect ratio. fal's default is `auto` when `None`.
+  pub aspect_ratio: Option<Flux3AspectRatio>,
+
+  /// Whether to generate synchronized audio. fal's default is `true` when
+  /// `None`. Audio does not affect the bill.
+  pub generate_audio: Option<bool>,
+
+  /// Safety tolerance, 0 (strictest) to 4 (most permissive). fal's default is
+  /// `2` when `None`.
+  pub safety_tolerance: Option<u8>,
+}
+
+impl FalEndpoint for Flux3DraftTextToVideoRequest {
+  const ENDPOINT: &str = "blackforestlabs/flux-3/text-to-video/draft";
+
+  type RawRequest = Flux3DraftTextToVideoInput;
+  type RawResponse = Flux3DraftTextToVideoOutput;
+
+  fn to_raw_request(&self) -> Result<Self::RawRequest, FalErrorPlus> {
+    Ok(Self::RawRequest {
+      prompt: self.prompt.clone(),
+      duration: self.duration,
+      aspect_ratio: self.aspect_ratio.map(|ar| ar.to_str().to_string()),
+      generate_audio: self.generate_audio,
+      safety_tolerance: self.safety_tolerance,
+    })
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+  use crate::creds::fal_api_key::FalApiKey;
+  use crate::requests::traits::fal_endpoint_trait::FalEndpoint;
+  use errors::AnyhowResult;
+  use std::fs::read_to_string;
+
+  // ── Real requests (manually run; require a live key and cost money) ──
+
+  #[tokio::test]
+  #[ignore] // manually run — fires a real API request and incurs cost
+  async fn test_text_to_video_webhook() -> AnyhowResult<()> {
+    let secret = read_to_string("/Users/bt/Artcraft/credentials/fal_api_key.txt")?;
+    let api_key = FalApiKey::from_str(&secret);
+
+    let request = Flux3DraftTextToVideoRequest {
+      prompt: "a white kitten chases a butterfly across a sunlit garden".to_string(),
+      duration: Some(Flux3Duration::Seconds(5)),
+      aspect_ratio: Some(Flux3AspectRatio::SixteenByNine),
+      generate_audio: Some(false),
+      safety_tolerance: None,
+    };
+
+    let result = request.send_webhook_request(&api_key, "https://example.com/webhook").await?;
+    println!("Webhook result: {:?}", result);
+    assert!(result.request_id.is_some() || result.gateway_request_id.is_some());
+    Ok(())
+  }
+
+  #[tokio::test]
+  #[ignore] // manually run — fires a real API request and incurs cost
+  async fn test_text_to_video_queue() -> AnyhowResult<()> {
+    let secret = read_to_string("/Users/bt/Artcraft/credentials/fal_api_key.txt")?;
+    let api_key = FalApiKey::from_str(&secret);
+
+    let request = Flux3DraftTextToVideoRequest {
+      prompt: "a wave crashes against a rocky shoreline at sunset".to_string(),
+      duration: Some(Flux3Duration::Seconds(5)),
+      aspect_ratio: Some(Flux3AspectRatio::SixteenByNine),
+      generate_audio: Some(false),
+      safety_tolerance: None,
+    };
+
+    let result = request.send_queue_request(&api_key).await?;
+    println!("Queue result — request_id: {}", result.request_id);
+    assert!(!result.request_id.is_empty());
+    Ok(())
+  }
+
+  // ── Wire-shape sanity (no API calls) ──
+
+  #[test]
+  fn raw_request_maps_all_fields() {
+    let request = Flux3DraftTextToVideoRequest {
+      prompt: "p".to_string(),
+      duration: Some(Flux3Duration::Seconds(12)),
+      aspect_ratio: Some(Flux3AspectRatio::ThreeByFour),
+      generate_audio: Some(false),
+      safety_tolerance: Some(4),
+    };
+    let raw = request.to_raw_request().unwrap();
+    assert_eq!(raw.prompt, "p");
+    assert_eq!(raw.duration, Some(Flux3Duration::Seconds(12)));
+    assert_eq!(raw.aspect_ratio.as_deref(), Some("3:4"));
+    assert_eq!(raw.generate_audio, Some(false));
+    assert_eq!(raw.safety_tolerance, Some(4));
+  }
+
+  #[test]
+  fn raw_request_omits_unset_optionals() {
+    let request = Flux3DraftTextToVideoRequest {
+      prompt: "minimal".to_string(),
+      duration: None,
+      aspect_ratio: None,
+      generate_audio: None,
+      safety_tolerance: None,
+    };
+    let json = serde_json::to_value(request.to_raw_request().unwrap()).unwrap();
+    assert_eq!(json, serde_json::json!({ "prompt": "minimal" }));
+  }
+
+  #[test]
+  fn draft_output_parses_video_and_draft_cache() {
+    let json = serde_json::json!({
+      "video": { "url": "https://example.com/draft.mp4" },
+      "draft_cache": { "url": "https://example.com/cache.bin" },
+      "extra_field": true,
+    });
+    let output: Flux3DraftTextToVideoOutput = serde_json::from_value(json).unwrap();
+    assert_eq!(output.video.url, "https://example.com/draft.mp4");
+    assert_eq!(output.draft_cache.url, "https://example.com/cache.bin");
+  }
+
+  #[test]
+  fn endpoint_path_is_canonical() {
+    assert_eq!(Flux3DraftTextToVideoRequest::ENDPOINT, "blackforestlabs/flux-3/text-to-video/draft");
+  }
+
+  // NB: Pricing tests are in cost.rs
+}

crates/api_clients/fal_client/src/requests/api/video/text/flux_3_draft/cost.rs

@@ -0,0 +1,70 @@
+use crate::requests::api::video::text::flux_3::cost::{
+  flux_3_estimated_duration_secs, flux_3_video_cost_cents,
+};
+use crate::requests::api::video::text::flux_3_draft::api::Flux3DraftTextToVideoRequest;
+use crate::requests::traits::fal_request_cost_calculator_trait::{FalRequestCostCalculator, UsdCents};
+
+// Flux 3 Draft pricing (see https://fal.ai/models/blackforestlabs/flux-3/text-to-video/draft):
+//   $0.06 per second of generated draft video (always 720p)
+//
+// The same rate applies to the draft image-to-video, first-last-frame, and
+// keyframes modalities (draft extend-video bills higher; see its cost
+// module). Audio, aspect ratio, and safety tolerance are free.
+const DRAFT_RATE_CENTS_PER_SEC: u64 = 6; // $0.06/sec
+
+/// Per-second rate in whole cents for the standard (non-extend) Flux 3 Draft
+/// generation modalities.
+pub(crate) fn flux_3_draft_generation_rate_cents_per_sec() -> u64 {
+  DRAFT_RATE_CENTS_PER_SEC
+}
+
+impl FalRequestCostCalculator for Flux3DraftTextToVideoRequest {
+  fn calculate_cost_in_cents(&self) -> UsdCents {
+    let duration_secs = flux_3_estimated_duration_secs(self.duration);
+    flux_3_video_cost_cents(flux_3_draft_generation_rate_cents_per_sec(), duration_secs)
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+  use crate::requests::api::video::text::flux_3::api::Flux3Duration;
+
+  fn make_request(duration: Option<Flux3Duration>) -> Flux3DraftTextToVideoRequest {
+    Flux3DraftTextToVideoRequest {
+      prompt: "test".to_string(),
+      duration,
+      aspect_ratio: None,
+      generate_audio: Some(true),
+      safety_tolerance: None,
+    }
+  }
+
+  mod cost_table {
+    use super::*;
+
+    // (duration, expected_cents)
+    // Math: 6¢ × secs; None/auto durations are estimated at the 5s floor.
+    const COST_TABLE: &[(Option<Flux3Duration>, u64)] = &[
+      (Some(Flux3Duration::Seconds(5)),  30),
+      (Some(Flux3Duration::Seconds(10)), 60),
+      (Some(Flux3Duration::Seconds(20)), 120),
+      (None, 30),
+      (Some(Flux3Duration::Auto), 30),
+    ];
+
+    #[test]
+    fn matches_cost_table() {
+      for &(duration, expected) in COST_TABLE {
+        let got = make_request(duration).calculate_cost_in_cents();
+        assert_eq!(got, expected, "duration={duration:?}");
+      }
+    }
+
+    #[test]
+    fn draft_is_cheaper_than_full_quality() {
+      use crate::requests::api::video::text::flux_3::cost::flux_3_standard_rate_cents_per_sec;
+      assert!(flux_3_draft_generation_rate_cents_per_sec() < flux_3_standard_rate_cents_per_sec(false));
+    }
+  }
+}

crates/api_clients/fal_client/src/requests/api/video/text/flux_3_draft/mod.rs

@@ -0,0 +1,3 @@
+pub mod api;
+pub mod cost;
+pub mod raw_request;

crates/api_clients/fal_client/src/requests/api/video/text/flux_3_draft/raw_request.rs

@@ -0,0 +1,44 @@
+use serde::{Deserialize, Serialize};
+
+use crate::requests::api::video::text::flux_3::api::Flux3Duration;
+
+/// Over-the-wire input shape for `blackforestlabs/flux-3/text-to-video/draft`.
+/// fal's schema: <https://fal.ai/models/blackforestlabs/flux-3/text-to-video/draft/api>
+#[derive(Debug, Serialize, Deserialize, Default)]
+pub struct Flux3DraftTextToVideoInput {
+  /// Text prompt for video generation.
+  pub prompt: String,
+
+  /// Duration in seconds ("auto" or 5–20). fal default: "auto" (the model
+  /// picks a duration that fits the prompt).
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub duration: Option<Flux3Duration>,
+
+  /// Aspect ratio.
+  /// Possible values: "auto", "21:9", "2:1", "16:9", "4:3", "1:1", "3:4",
+  /// "9:16". fal default: "auto".
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub aspect_ratio: Option<String>,
+
+  /// Whether to generate synchronized audio. fal default: true.
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub generate_audio: Option<bool>,
+
+  /// Safety tolerance, 0 (strictest) to 4 (most permissive). fal default: 2.
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub safety_tolerance: Option<u8>,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Flux3DraftVideoFile {
+  pub url: String,
+}
+
+/// Draft outputs carry the 720p draft video plus a durable encrypted cache
+/// bundle whose URL can be passed to `draft-enhance` for a full-quality
+/// 1080p render.
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Flux3DraftTextToVideoOutput {
+  pub video: Flux3DraftVideoFile,
+  pub draft_cache: Flux3DraftVideoFile,
+}

crates/api_clients/fal_client/src/requests/api/video/text/minimax_h3/api.rs

@@ -0,0 +1,192 @@
+use crate::error::fal_error_plus::FalErrorPlus;
+use crate::requests::api::video::text::minimax_h3::raw_request::{
+  MinimaxH3TextToVideoInput, MinimaxH3TextToVideoOutput,
+};
+use crate::requests::traits::fal_endpoint_trait::FalEndpoint;
+
+#[derive(Clone, Debug)]
+pub struct MinimaxH3TextToVideoRequest {
+  /// Text prompt (1 to 7000 characters).
+  pub prompt: String,
+
+  /// Duration in seconds. Valid range 5–15; fal's default is `5` when `None`.
+  pub duration: Option<u8>,
+
+  /// Output resolution. fal's default is `2K` when `None`.
+  pub resolution: Option<MinimaxH3Resolution>,
+
+  /// Aspect ratio. fal's default is `16:9` when `None`.
+  pub aspect_ratio: Option<MinimaxH3TextToVideoAspectRatio>,
+}
+
+/// MiniMax H3 (Hailuo-03) resolutions. 2K bills at a higher per-second rate
+/// than 768P (see the cost module). Shared by the text + image + reference
+/// modalities.
+#[derive(Copy, Clone, Debug, Eq, PartialEq)]
+pub enum MinimaxH3Resolution {
+  SevenSixtyEightP,
+  TwoK,
+}
+
+impl MinimaxH3Resolution {
+  /// 2K is billed at the higher per-second rate.
+  pub fn is_2k(&self) -> bool {
+    matches!(self, Self::TwoK)
+  }
+
+  pub(crate) fn to_str(&self) -> &'static str {
+    match self {
+      Self::SevenSixtyEightP => "768P",
+      Self::TwoK => "2K",
+    }
+  }
+}
+
+#[derive(Copy, Clone, Debug, Eq, PartialEq)]
+pub enum MinimaxH3TextToVideoAspectRatio {
+  TwentyOneByNine,
+  SixteenByNine,
+  FourByThree,
+  Square,
+  ThreeByFour,
+  NineBySixteen,
+}
+
+impl MinimaxH3TextToVideoAspectRatio {
+  fn to_str(&self) -> &'static str {
+    match self {
+      Self::TwentyOneByNine => "21:9",
+      Self::SixteenByNine => "16:9",
+      Self::FourByThree => "4:3",
+      Self::Square => "1:1",
+      Self::ThreeByFour => "3:4",
+      Self::NineBySixteen => "9:16",
+    }
+  }
+}
+
+impl FalEndpoint for MinimaxH3TextToVideoRequest {
+  const ENDPOINT: &str = "minimax/h3/text-to-video";
+
+  type RawRequest = MinimaxH3TextToVideoInput;
+  type RawResponse = MinimaxH3TextToVideoOutput;
+
+  fn to_raw_request(&self) -> Result<Self::RawRequest, FalErrorPlus> {
+    Ok(Self::RawRequest {
+      prompt: self.prompt.clone(),
+      duration: self.duration,
+      resolution: self.resolution.map(|r| r.to_str().to_string()),
+      aspect_ratio: self.aspect_ratio.map(|ar| ar.to_str().to_string()),
+    })
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+  use crate::creds::fal_api_key::FalApiKey;
+  use crate::requests::traits::fal_endpoint_trait::FalEndpoint;
+  use errors::AnyhowResult;
+  use std::fs::read_to_string;
+
+  // ── Real requests (manually run; require a live key and cost money) ──
+
+  #[tokio::test]
+  #[ignore] // manually run — fires a real API request and incurs cost
+  async fn test_text_to_video_webhook() -> AnyhowResult<()> {
+    let secret = read_to_string("/Users/bt/Artcraft/credentials/fal_api_key.txt")?;
+    let api_key = FalApiKey::from_str(&secret);
+
+    let request = MinimaxH3TextToVideoRequest {
+      prompt: "a white kitten chases a butterfly across a sunlit garden".to_string(),
+      duration: Some(5),
+      resolution: Some(MinimaxH3Resolution::SevenSixtyEightP),
+      aspect_ratio: Some(MinimaxH3TextToVideoAspectRatio::SixteenByNine),
+    };
+
+    let result = request.send_webhook_request(&api_key, "https://example.com/webhook").await?;
+    println!("Webhook result: {:?}", result);
+    assert!(result.request_id.is_some() || result.gateway_request_id.is_some());
+    Ok(())
+  }
+
+  #[tokio::test]
+  #[ignore] // manually run — fires a real API request and incurs cost
+  async fn test_text_to_video_queue() -> AnyhowResult<()> {
+    let secret = read_to_string("/Users/bt/Artcraft/credentials/fal_api_key.txt")?;
+    let api_key = FalApiKey::from_str(&secret);
+
+    let request = MinimaxH3TextToVideoRequest {
+      prompt: "a wave crashes against a rocky shoreline at sunset".to_string(),
+      duration: Some(5),
+      resolution: Some(MinimaxH3Resolution::SevenSixtyEightP),
+      aspect_ratio: Some(MinimaxH3TextToVideoAspectRatio::SixteenByNine),
+    };
+
+    let result = request.send_queue_request(&api_key).await?;
+    println!("Queue result — request_id: {}", result.request_id);
+    assert!(!result.request_id.is_empty());
+    Ok(())
+  }
+
+  // ── Wire-shape sanity (no API calls) ──
+
+  #[test]
+  fn raw_request_maps_all_fields() {
+    let request = MinimaxH3TextToVideoRequest {
+      prompt: "p".to_string(),
+      duration: Some(12),
+      resolution: Some(MinimaxH3Resolution::TwoK),
+      aspect_ratio: Some(MinimaxH3TextToVideoAspectRatio::FourByThree),
+    };
+    let raw = request.to_raw_request().unwrap();
+    assert_eq!(raw.prompt, "p");
+    assert_eq!(raw.duration, Some(12));
+    assert_eq!(raw.resolution.as_deref(), Some("2K"));
+    assert_eq!(raw.aspect_ratio.as_deref(), Some("4:3"));
+  }
+
+  #[test]
+  fn raw_request_omits_unset_optionals() {
+    let request = MinimaxH3TextToVideoRequest {
+      prompt: "minimal".to_string(),
+      duration: None,
+      resolution: None,
+      aspect_ratio: None,
+    };
+    let json = serde_json::to_value(request.to_raw_request().unwrap()).unwrap();
+    assert_eq!(json, serde_json::json!({ "prompt": "minimal" }));
+  }
+
+  #[test]
+  fn every_resolution_maps_to_wire_string() {
+    for (variant, expected, is_2k) in [
+      (MinimaxH3Resolution::SevenSixtyEightP, "768P", false),
+      (MinimaxH3Resolution::TwoK, "2K", true),
+    ] {
+      assert_eq!(variant.to_str(), expected);
+      assert_eq!(variant.is_2k(), is_2k);
+    }
+  }
+
+  #[test]
+  fn every_aspect_ratio_maps_to_wire_string() {
+    for (variant, expected) in [
+      (MinimaxH3TextToVideoAspectRatio::TwentyOneByNine, "21:9"),
+      (MinimaxH3TextToVideoAspectRatio::SixteenByNine, "16:9"),
+      (MinimaxH3TextToVideoAspectRatio::FourByThree, "4:3"),
+      (MinimaxH3TextToVideoAspectRatio::Square, "1:1"),
+      (MinimaxH3TextToVideoAspectRatio::ThreeByFour, "3:4"),
+      (MinimaxH3TextToVideoAspectRatio::NineBySixteen, "9:16"),
+    ] {
+      assert_eq!(variant.to_str(), expected);
+    }
+  }
+
+  #[test]
+  fn endpoint_path_is_canonical() {
+    assert_eq!(MinimaxH3TextToVideoRequest::ENDPOINT, "minimax/h3/text-to-video");
+  }
+
+  // NB: Pricing tests are in cost.rs
+}

crates/api_clients/fal_client/src/requests/api/video/text/minimax_h3/cost.rs

@@ -0,0 +1,118 @@
+use crate::requests::api::video::text::minimax_h3::api::{
+  MinimaxH3Resolution, MinimaxH3TextToVideoRequest,
+};
+use crate::requests::traits::fal_request_cost_calculator_trait::{FalRequestCostCalculator, UsdCents};
+
+// MiniMax H3 (Hailuo-03) pricing (see https://fal.ai/models/minimax/h3/text-to-video):
+//   768P: $0.16 per video second
+//   2K:   $0.26 per video second
+//
+// Pricing depends on resolution and duration only (aspect ratio is free).
+// Both rates are exact whole cents. Shared by the text + image + reference
+// modalities (reference additionally bills extra reference images; see the
+// reference cost module).
+const RATE_768P_CENTS_PER_SEC: u64 = 16; // $0.16/sec
+const RATE_2K_CENTS_PER_SEC: u64 = 26; // $0.26/sec
+
+/// Per-second rate in whole cents for MiniMax H3. `is_2k` selects the 2K tier.
+pub(crate) fn minimax_h3_rate_cents_per_sec(is_2k: bool) -> u64 {
+  if is_2k { RATE_2K_CENTS_PER_SEC } else { RATE_768P_CENTS_PER_SEC }
+}
+
+/// Per-second rate × duration → whole cents (both rates are exact cents, so no
+/// rounding is needed).
+pub(crate) fn minimax_h3_video_cost_cents(rate_cents_per_sec: u64, duration_secs: u64) -> UsdCents {
+  rate_cents_per_sec * duration_secs
+}
+
+impl FalRequestCostCalculator for MinimaxH3TextToVideoRequest {
+  fn calculate_cost_in_cents(&self) -> UsdCents {
+    // fal defaults when unset: duration = 5s, resolution = 2K.
+    let duration_secs = u64::from(self.duration.unwrap_or(5));
+    let is_2k = self.resolution
+      .unwrap_or(MinimaxH3Resolution::TwoK)
+      .is_2k();
+
+    let rate = minimax_h3_rate_cents_per_sec(is_2k);
+    minimax_h3_video_cost_cents(rate, duration_secs)
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+  use crate::requests::api::video::text::minimax_h3::api::MinimaxH3TextToVideoAspectRatio;
+
+  fn make_request(
+    duration: Option<u8>,
+    resolution: Option<MinimaxH3Resolution>,
+  ) -> MinimaxH3TextToVideoRequest {
+    MinimaxH3TextToVideoRequest {
+      prompt: "test".to_string(),
+      duration,
+      resolution,
+      aspect_ratio: Some(MinimaxH3TextToVideoAspectRatio::SixteenByNine),
+    }
+  }
+
+  mod cost_table {
+    use super::*;
+
+    // (duration, resolution, expected_cents)
+    // Math: rate × secs where rate (cents) = 16 (768P) or 26 (2K).
+    const COST_TABLE: &[(Option<u8>, Option<MinimaxH3Resolution>, u64)] = &[
+      // 768P → $0.16/s
+      (Some(5),  Some(MinimaxH3Resolution::SevenSixtyEightP), 80),
+      (Some(10), Some(MinimaxH3Resolution::SevenSixtyEightP), 160),
+      (Some(15), Some(MinimaxH3Resolution::SevenSixtyEightP), 240),
+      // 2K → $0.26/s
+      (Some(5),  Some(MinimaxH3Resolution::TwoK), 130),
+      (Some(10), Some(MinimaxH3Resolution::TwoK), 260),
+      (Some(15), Some(MinimaxH3Resolution::TwoK), 390),
+      // Defaults: duration=None→5s, resolution=None→2K
+      (None, None, 130),
+      (Some(8), None, 208),
+      (None, Some(MinimaxH3Resolution::SevenSixtyEightP), 80),
+    ];
+
+    #[test]
+    fn matches_cost_table() {
+      for &(duration, resolution, expected) in COST_TABLE {
+        let got = make_request(duration, resolution).calculate_cost_in_cents();
+        assert_eq!(got, expected, "duration={duration:?} resolution={resolution:?}");
+      }
+    }
+
+    #[test]
+    fn two_k_is_more_expensive_than_768p() {
+      let low = make_request(Some(8), Some(MinimaxH3Resolution::SevenSixtyEightP)).calculate_cost_in_cents();
+      let high = make_request(Some(8), Some(MinimaxH3Resolution::TwoK)).calculate_cost_in_cents();
+      assert!(high > low, "2K={high}¢ should exceed 768P={low}¢");
+    }
+
+    #[test]
+    fn cost_scales_linearly_with_duration() {
+      let five = make_request(Some(5), Some(MinimaxH3Resolution::SevenSixtyEightP)).calculate_cost_in_cents();
+      let ten = make_request(Some(10), Some(MinimaxH3Resolution::SevenSixtyEightP)).calculate_cost_in_cents();
+      assert_eq!(ten, five * 2);
+    }
+
+    /// Aspect ratio does not affect the bill (only resolution + duration do).
+    #[test]
+    fn cost_ignores_aspect_ratio() {
+      let baseline = make_request(Some(8), Some(MinimaxH3Resolution::TwoK)).calculate_cost_in_cents();
+      for ar in [
+        None,
+        Some(MinimaxH3TextToVideoAspectRatio::TwentyOneByNine),
+        Some(MinimaxH3TextToVideoAspectRatio::Square),
+        Some(MinimaxH3TextToVideoAspectRatio::NineBySixteen),
+      ] {
+        let cost = MinimaxH3TextToVideoRequest {
+          aspect_ratio: ar,
+          ..make_request(Some(8), Some(MinimaxH3Resolution::TwoK))
+        }.calculate_cost_in_cents();
+        assert_eq!(cost, baseline, "ar={ar:?}");
+      }
+    }
+  }
+}

crates/api_clients/fal_client/src/requests/api/video/text/minimax_h3/mod.rs

@@ -0,0 +1,3 @@
+pub mod api;
+pub mod cost;
+pub mod raw_request;

crates/api_clients/fal_client/src/requests/api/video/text/minimax_h3/raw_request.rs

@@ -0,0 +1,33 @@
+use serde::{Deserialize, Serialize};
+
+/// Over-the-wire input shape for `minimax/h3/text-to-video`.
+/// fal's schema: <https://fal.ai/models/minimax/h3/text-to-video/api>
+#[derive(Debug, Serialize, Deserialize, Default)]
+pub struct MinimaxH3TextToVideoInput {
+  /// Text prompt (1 to 7000 characters).
+  pub prompt: String,
+
+  /// Duration in seconds. Range 5–15. fal default: 5.
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub duration: Option<u8>,
+
+  /// Output resolution.
+  /// Possible values: "768P", "2K". fal default: "2K".
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub resolution: Option<String>,
+
+  /// Aspect ratio.
+  /// Possible values: "21:9", "16:9", "4:3", "1:1", "3:4", "9:16". fal default: "16:9".
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub aspect_ratio: Option<String>,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct MinimaxH3TextToVideoVideoFile {
+  pub url: String,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct MinimaxH3TextToVideoOutput {
+  pub video: MinimaxH3TextToVideoVideoFile,
+}

crates/api_clients/fal_client/src/requests/api/video/text/mod.rs

@@ -1,7 +1,10 @@
+pub mod flux_3;
+pub mod flux_3_draft;
 pub mod kling_1p6_pro_text_to_video;
 pub mod kling_2p5_turbo_pro_text_to_video;
 pub mod kling_2p6_pro_text_to_video;
 pub mod kling_3p0_standard_text_to_video;
+pub mod minimax_h3;
 pub mod veo_2;
 pub mod veo_3;
 pub mod veo_3_fast;

crates/desktop/artcraft/src/core/commands/generate/common/router_video_request_to_artcraft_prompt.rs

@@ -61,6 +61,9 @@ fn video_model_to_common_model_type(model: RouterVideoModel) -> Option<CommonMod
     RouterVideoModel::Seedance2p0 => Some(CommonModelType::Seedance2p0),
     RouterVideoModel::Seedance2p0Fast => Some(CommonModelType::Seedance2p0Fast),
     RouterVideoModel::HappyHorse1p0 => Some(CommonModelType::HappyHorse1p0),
+    RouterVideoModel::MinimaxH3 => Some(CommonModelType::MinimaxH3),
+    RouterVideoModel::Flux3 => Some(CommonModelType::Flux3),
+    RouterVideoModel::Flux3Draft => Some(CommonModelType::Flux3Draft),
     RouterVideoModel::Sora2 => Some(CommonModelType::Sora2),
     RouterVideoModel::Sora2Pro => Some(CommonModelType::Sora2Pro),
     RouterVideoModel::Veo2 => Some(CommonModelType::Veo2),

crates/schema/database/mysql_queries/src/queries/users/api_or_web_sessions/api_or_web_session_user_record.rs

@@ -16,6 +16,9 @@ pub struct ApiOrWebSessionUserRecord {
   pub is_banned: bool,
   pub can_ban_users: bool,
 
+  /// Optional comma-separated list of parseable `UserFeatureFlag` enum features.
+  pub maybe_feature_flags: Option<String>,
+
   /// Only set when the lookup was by API key.
   pub maybe_api_key_token: Option<ApiKeyToken>,
 }

crates/schema/database/mysql_queries/src/queries/users/api_or_web_sessions/get_api_or_web_session_user_by_api_key.rs

@@ -40,6 +40,7 @@ SELECT
   users.user_role_slug,
   users.is_banned,
   user_roles.can_ban_users,
+  users.maybe_feature_flags,
   api_keys.token as `api_key_token: ApiKeyToken`
 FROM api_keys
 INNER JOIN users
@@ -65,6 +66,7 @@ LIMIT 1
     user_role_slug: r.user_role_slug,
     is_banned: i8_to_bool(r.is_banned),
     can_ban_users: nullable_i8_to_bool_default_false(r.can_ban_users),
+    maybe_feature_flags: r.maybe_feature_flags,
     maybe_api_key_token: Some(r.api_key_token),
   }))
 }

crates/schema/database/mysql_queries/src/queries/users/api_or_web_sessions/get_api_or_web_session_user_by_session_token.rs

@@ -37,7 +37,8 @@ SELECT
   users.email_address,
   users.user_role_slug,
   users.is_banned,
-  user_roles.can_ban_users
+  user_roles.can_ban_users,
+  users.maybe_feature_flags
 FROM user_sessions
 INNER JOIN users
   ON users.token = user_sessions.user_token
@@ -62,6 +63,7 @@ LIMIT 1
     user_role_slug: r.user_role_slug,
     is_banned: i8_to_bool(r.is_banned),
     can_ban_users: nullable_i8_to_bool_default_false(r.can_ban_users),
+    maybe_feature_flags: r.maybe_feature_flags,
     maybe_api_key_token: None,
   }))
 }

crates/schema/public/enums/src/by_table/generic_inference_jobs/inference_model_type.rs

@@ -164,6 +164,10 @@ pub enum InferenceModelType {
   GrokImagineVideo,
   #[serde(rename = "grok_imagine_video_1p5")]
   GrokImagineVideo1p5,
+  #[serde(rename = "flux_3")]
+  Flux3,
+  #[serde(rename = "flux_3_draft")]
+  Flux3Draft,
   #[serde(rename = "kling_1p6_pro")]
   Kling16Pro,
   #[serde(rename = "kling_2p1_pro")]
@@ -180,6 +184,8 @@ pub enum InferenceModelType {
   Kling3p0Pro,
   #[serde(rename = "happy_horse_1p0")]
   HappyHorse1p0,
+  #[serde(rename = "minimax_h3")]
+  MinimaxH3,
   #[serde(rename = "seedance_1p0_lite")]
   Seedance10Lite,
   #[serde(rename = "seedance_1p0_pro")]
@@ -358,6 +364,8 @@ impl InferenceModelType {
       Self::GrokVideo => "grok_video",
       Self::GrokImagineVideo => "grok_imagine_video",
       Self::GrokImagineVideo1p5 => "grok_imagine_video_1p5",
+      Self::Flux3 => "flux_3",
+      Self::Flux3Draft => "flux_3_draft",
       Self::Kling16Pro => "kling_1p6_pro",
       Self::Kling21Pro => "kling_2p1_pro",
       Self::Kling21Master => "kling_2p1_master",
@@ -366,6 +374,7 @@ impl InferenceModelType {
       Self::Kling3p0Standard => "kling_3p0_standard",
       Self::Kling3p0Pro => "kling_3p0_pro",
       Self::HappyHorse1p0 => "happy_horse_1p0",
+      Self::MinimaxH3 => "minimax_h3",
       Self::Seedance10Lite => "seedance_1p0_lite",
       Self::Seedance10Pro => "seedance_1p0_pro",
       Self::Seedance1p5Pro => "seedance_1p5_pro",
@@ -489,6 +498,8 @@ impl InferenceModelType {
       "grok_video" => Ok(Self::GrokVideo),
       "grok_imagine_video" => Ok(Self::GrokImagineVideo),
       "grok_imagine_video_1p5" => Ok(Self::GrokImagineVideo1p5),
+      "flux_3" => Ok(Self::Flux3),
+      "flux_3_draft" => Ok(Self::Flux3Draft),
       "kling_1p6_pro" => Ok(Self::Kling16Pro),
       "kling_2p1_pro" => Ok(Self::Kling21Pro),
       "kling_2p1_master" => Ok(Self::Kling21Master),
@@ -497,6 +508,7 @@ impl InferenceModelType {
       "kling_3p0_standard" => Ok(Self::Kling3p0Standard),
       "kling_3p0_pro" => Ok(Self::Kling3p0Pro),
       "happy_horse_1p0" => Ok(Self::HappyHorse1p0),
+      "minimax_h3" => Ok(Self::MinimaxH3),
       "seedance_1p0_lite" => Ok(Self::Seedance10Lite),
       "seedance_1p0_pro" => Ok(Self::Seedance10Pro),
       "seedance_1p5_pro" => Ok(Self::Seedance1p5Pro),
@@ -624,6 +636,8 @@ impl InferenceModelType {
       Self::GrokVideo,
       Self::GrokImagineVideo,
       Self::GrokImagineVideo1p5,
+      Self::Flux3,
+      Self::Flux3Draft,
       Self::Kling16Pro,
       Self::Kling21Pro,
       Self::Kling21Master,
@@ -632,6 +646,7 @@ impl InferenceModelType {
       Self::Kling3p0Standard,
       Self::Kling3p0Pro,
       Self::HappyHorse1p0,
+      Self::MinimaxH3,
       Self::Seedance10Lite,
       Self::Seedance10Pro,
       Self::Seedance1p5Pro,
@@ -742,6 +757,8 @@ impl InferenceModelType {
       CommonModelType::GrokVideo => Self::GrokVideo,
       CommonModelType::GrokImagineVideo => Self::GrokImagineVideo,
       CommonModelType::GrokImagineVideo1p5 => Self::GrokImagineVideo1p5,
+      CommonModelType::Flux3 => Self::Flux3,
+      CommonModelType::Flux3Draft => Self::Flux3Draft,
       CommonModelType::Kling16Pro => Self::Kling16Pro,
       CommonModelType::Kling21Pro => Self::Kling21Pro,
       CommonModelType::Kling21Master => Self::Kling21Master,
@@ -750,6 +767,7 @@ impl InferenceModelType {
       CommonModelType::Kling3p0Standard => Self::Kling3p0Standard,
       CommonModelType::Kling3p0Pro => Self::Kling3p0Pro,
       CommonModelType::HappyHorse1p0 => Self::HappyHorse1p0,
+      CommonModelType::MinimaxH3 => Self::MinimaxH3,
       CommonModelType::Seedance10Lite => Self::Seedance10Lite,
       CommonModelType::Seedance10Pro => Self::Seedance10Pro,
       CommonModelType::Seedance1p5Pro => Self::Seedance1p5Pro,
@@ -882,6 +900,8 @@ mod tests {
       assert_serialization(InferenceModelType::GrokVideo, "grok_video");
       assert_serialization(InferenceModelType::GrokImagineVideo, "grok_imagine_video");
       assert_serialization(InferenceModelType::GrokImagineVideo1p5, "grok_imagine_video_1p5");
+      assert_serialization(InferenceModelType::Flux3, "flux_3");
+      assert_serialization(InferenceModelType::Flux3Draft, "flux_3_draft");
       assert_serialization(InferenceModelType::Kling16Pro, "kling_1p6_pro");
       assert_serialization(InferenceModelType::Kling21Pro, "kling_2p1_pro");
       assert_serialization(InferenceModelType::Kling21Master, "kling_2p1_master");
@@ -890,6 +910,7 @@ mod tests {
       assert_serialization(InferenceModelType::Kling3p0Standard, "kling_3p0_standard");
       assert_serialization(InferenceModelType::Kling3p0Pro, "kling_3p0_pro");
       assert_serialization(InferenceModelType::HappyHorse1p0, "happy_horse_1p0");
+      assert_serialization(InferenceModelType::MinimaxH3, "minimax_h3");
       assert_serialization(InferenceModelType::Seedance10Lite, "seedance_1p0_lite");
       assert_serialization(InferenceModelType::Seedance10Pro, "seedance_1p0_pro");
       assert_serialization(InferenceModelType::Seedance1p5Pro, "seedance_1p5_pro");
@@ -1009,6 +1030,8 @@ mod tests {
       assert_eq!(InferenceModelType::GrokVideo.to_str(), "grok_video");
       assert_eq!(InferenceModelType::GrokImagineVideo.to_str(), "grok_imagine_video");
       assert_eq!(InferenceModelType::GrokImagineVideo1p5.to_str(), "grok_imagine_video_1p5");
+      assert_eq!(InferenceModelType::Flux3.to_str(), "flux_3");
+      assert_eq!(InferenceModelType::Flux3Draft.to_str(), "flux_3_draft");
       assert_eq!(InferenceModelType::Kling16Pro.to_str(), "kling_1p6_pro");
       assert_eq!(InferenceModelType::Kling21Pro.to_str(), "kling_2p1_pro");
       assert_eq!(InferenceModelType::Kling21Master.to_str(), "kling_2p1_master");
@@ -1017,6 +1040,7 @@ mod tests {
       assert_eq!(InferenceModelType::Kling3p0Standard.to_str(), "kling_3p0_standard");
       assert_eq!(InferenceModelType::Kling3p0Pro.to_str(), "kling_3p0_pro");
       assert_eq!(InferenceModelType::HappyHorse1p0.to_str(), "happy_horse_1p0");
+      assert_eq!(InferenceModelType::MinimaxH3.to_str(), "minimax_h3");
       assert_eq!(InferenceModelType::Seedance10Lite.to_str(), "seedance_1p0_lite");
       assert_eq!(InferenceModelType::Seedance10Pro.to_str(), "seedance_1p0_pro");
       assert_eq!(InferenceModelType::Seedance1p5Pro.to_str(), "seedance_1p5_pro");
@@ -1138,6 +1162,8 @@ mod tests {
       assert_eq!(InferenceModelType::from_str("grok_video").unwrap(), InferenceModelType::GrokVideo);
       assert_eq!(InferenceModelType::from_str("grok_imagine_video").unwrap(), InferenceModelType::GrokImagineVideo);
       assert_eq!(InferenceModelType::from_str("grok_imagine_video_1p5").unwrap(), InferenceModelType::GrokImagineVideo1p5);
+      assert_eq!(InferenceModelType::from_str("flux_3").unwrap(), InferenceModelType::Flux3);
+      assert_eq!(InferenceModelType::from_str("flux_3_draft").unwrap(), InferenceModelType::Flux3Draft);
       assert_eq!(InferenceModelType::from_str("kling_1p6_pro").unwrap(), InferenceModelType::Kling16Pro);
       assert_eq!(InferenceModelType::from_str("kling_2p1_pro").unwrap(), InferenceModelType::Kling21Pro);
       assert_eq!(InferenceModelType::from_str("kling_2p1_master").unwrap(), InferenceModelType::Kling21Master);
@@ -1146,6 +1172,7 @@ mod tests {
       assert_eq!(InferenceModelType::from_str("kling_3p0_standard").unwrap(), InferenceModelType::Kling3p0Standard);
       assert_eq!(InferenceModelType::from_str("kling_3p0_pro").unwrap(), InferenceModelType::Kling3p0Pro);
       assert_eq!(InferenceModelType::from_str("happy_horse_1p0").unwrap(), InferenceModelType::HappyHorse1p0);
+      assert_eq!(InferenceModelType::from_str("minimax_h3").unwrap(), InferenceModelType::MinimaxH3);
       assert_eq!(InferenceModelType::from_str("seedance_1p0_lite").unwrap(), InferenceModelType::Seedance10Lite);
       assert_eq!(InferenceModelType::from_str("seedance_1p0_pro").unwrap(), InferenceModelType::Seedance10Pro);
       assert_eq!(InferenceModelType::from_str("seedance_1p5_pro").unwrap(), InferenceModelType::Seedance1p5Pro);