Show Flux and Krea as Image v2 engine cards, and run Krea on edit, compose, and refine.

Krea image-to-image uses encode plus denoise graphs, not Klein reference latents, and still fails closed if the Krea models are missing.

Co-authored-by: Cursor <cursoragent@cursor.com>

docs/image-v2.md

@@ -6,12 +6,12 @@ Image edit (v1) and Image v2 are siblings. v1 is unchanged. Do not mute-fix `wor
 |---|---|---|
 | Tab | Image edit | Image v2 |
 | Route | `POST /api/edit` | `POST /api/v2/generate` and `POST /v2/generate` |
-| Graphs | One file, prune unused branch | `klein_v2_edit.json`, `klein_v2_compose.json`, `klein_v2_refine.json`, `klein_v2_generate.json`, or `krea_v2_generate.json` |
+| Graphs | One file, prune unused branch | Klein or Krea graphs per mode. Engine is always visible. |
 | Second still | Optional; switches branch | Compose only; required. Mismatch is a 400 |
 | Mask | — | Refine only; required. Missing mask is a 400, not an Edit fallback |
 | Input still | Required | Edit / Compose / Refine required. Generate ignores stills |
-| LoRAs | Optional user picker | Consistency (Flux). Concept LoRA on xAIGen only. Generate Consistency off. Krea Generate has no Consistency |
-| Defaults | 20 steps, CFG 1 | Flux: 24 steps, CFG 4 (turbo: 8 / 1). Krea Generate: 8 steps, CFG 1 |
+| LoRAs | Optional user picker | Consistency (Flux only). Concept LoRA on xAIGen only. Krea has no Consistency |
+| Defaults | 20 steps, CFG 1 | Flux: 24 steps, CFG 4 (turbo: 8 / 1). Krea: 8 steps, CFG 1 |
 
 Poll v2 jobs the same way as v1: `GET /api/generate/{id}/stream` and `GET /api/generate/{id}`.
 
@@ -20,7 +20,7 @@ Poll v2 jobs the same way as v1: `GET /api/generate/{id}/stream` and `GET /api/g
 - **edit** — one image + text. Task is `scene`. Sending `image_b` is rejected. Use this to change lighting, background, or the whole frame from a single still.
 - **compose** — two images + text. `image_b` is required. No silent one-image fallback. Use this to lock a person from A and pull a face or outfit from B.
 - **refine** — one canvas + a painted mask + text. `image_a` and `mask` are required. `image_b` is ignored. Prompt only what should change inside the mask. Strength is denoise in that region (not CFG). Use this for face / hand / chest fixes without opening Comfy.
-- **generate** — text only. No `image_a`, `image_b`, or mask. Size is width × height (768 / 1024 / 1280), not megapixels from a still. Engine is Flux (`klein_v2_generate.json`) or Krea (`krea_v2_generate.json`). Edit / Compose / Refine stay Flux.
+- **generate** — text only. No `image_a`, `image_b`, or mask. Size is width × height (768 / 1024 / 1280), not megapixels from a still. Engine is Flux or Krea for every Image v2 mode. Video stays MiniMax / LTX.
 
 Compose tasks:
 
@@ -37,6 +37,7 @@ Dummy tests:
 - Refine + last good gen + mask on the left breast + “red X painted on the left breast” at strength 0.4. Pass = X on the breast, face/pose/background stay. Fail = whole image regenerates, or nothing changes.
 - Generate + Flux + “a red cube on a white table, studio light” and no stills. Pass = a new image of that. Fail = missing-image error, or the output equals the last Edit/Compose still.
 - Generate + Krea + the same prompt. Pass = `krea_v2_generate.json` is queued. Fail = Flux graph runs under a Krea label, or a missing Krea model falls back to Flux.
+- Edit + Krea + one still. Pass = `krea_v2_edit.json`. Fail = Klein graph or Generate empty latent.
 
 ## Nodes the mapper patches
 
@@ -97,9 +98,11 @@ Generate Krea (`krea_v2_generate.json`):
 | `15` | `KSampler` euler / simple, default 8 steps, CFG 1 |
 | `9` / `10` | Prompt / negative from the API |
 
-Krea does not load Klein UNET, Klein CLIP, Klein VAE, Klein Consistency, or the Klein concept LoRA. Missing Krea diffusion / text encoder / VAE fails the job. Concept LoRA (`klein_snofs_v1_4`) is xAIGen only; AIGen bypasses that node. On Krea it stays off unless `NUXT_KREA_CONCEPT_LORA` is set on xAIGen.
+Krea Edit / Compose / Refine use the same UNET / CLIP / VAE. They encode the still (`VAEEncode`) and sample with denoise < 1. Krea has no Klein `ReferenceLatent`. Compose stitches A then B (`ImageStitch`) so both stills are in the latent. Missing Krea models fail the job. No Flux fallback.
 
-There is no `LoadImage`. If the executed Generate graph has a required LoadImage, the job fails. v1 node 145 (muted T2I with a baked prompt) is not used.
+Krea does not load Klein UNET, Klein CLIP, Klein VAE, Klein Consistency, or the Klein concept LoRA. Concept LoRA (`klein_snofs_v1_4`) is xAIGen only; AIGen bypasses that node. On Krea it stays off unless `NUXT_KREA_CONCEPT_LORA` is set on xAIGen.
+
+There is no `LoadImage` on Generate. If the executed Generate graph has a required LoadImage, the job fails. v1 node 145 (muted T2I with a baked prompt) is not used.
 
 If `image_b` is sent on Edit/Compose and the executed graph has fewer than two `LoadImage` nodes, the job fails. If Refine runs without a mask input or without denoise on the scheduler, the job fails.
 
@@ -114,7 +117,7 @@ If `image_b` is sent on Edit/Compose and the executed graph has fewer than two `
 | Steps | 24 (turbo 8) |
 | CFG | 4 (turbo 1) |
 | Scale to MP | 1.0 lanczos |
-| Strength (denoise) | 0.35 on Refine only. Hidden on Edit/Compose/Generate. Range 0.15–0.75 |
+| Strength (denoise) | 0.35 on Flux Refine. Krea Edit 0.75, Compose 0.70, Refine uses the slider. Hidden on Flux Edit/Compose/Generate. Range 0.15–0.75 |
 | Size | Generate only. 1:1 1024×1024, 3:4 768×1024, 4:3 1024×768, 16:9 1280×768, 9:16 768×1280 |
 
 ### When to use each Refine strength
@@ -133,5 +136,6 @@ Do not raise Strength to rewrite the whole frame. If the face or background move
 - **refine** — prompt only the masked change. Face vs hand/chest chips set Strength and LoRAs together.
 - **generate / Flux** — On xAIGen, Concept LoRA defaults 0.65 / 0.35. On AIGen the node is not loaded. Consistency stays 0. Turbo is 8 steps / CFG 1.
 - **generate / Krea** — 8 steps, CFG 1, no Consistency. Concept LoRA stays 0 unless a Krea concept file is configured.
+- **edit / compose / refine / Krea** — same 8 / CFG 1. Strength is denoise on the encoded still. Compose stitches A|B.
 
 Presets on this tab store sliders + mode + task + engine (+ Strength when Refine, + size when Generate). They do not load v1 LoRA stacks or a cached latent. Missing engine on an old preset is Flux.