Pictures from ComfyUI at /v1/images/generations

An external model with api: comfyui is a ComfyUI server. A request for
pictures goes through the same key, allowlist, limit, admission and guard
checks as any other; at the replica it becomes a workflow — a built-in
(flux-schnell, flux-dev) or a JSON file in API format, with {{prompt}},
{{width}}, {{seed}} and the like filled in — queued, waited on, and its
pictures sent back as b64_json. A client that leaves takes its workflow
off the queue or interrupts it. ComfyUI is never scraped for metrics.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

docs/reference.md

@@ -60,6 +60,7 @@ rather than repeated.
 | `tools` | `bool` | [Capabilities](#capabilities) |
 | `vision` | `bool` | [Capabilities](#capabilities) |
 | `embeddings` | `bool` | [Capabilities](#capabilities) |
+| `images` | `bool` | [Capabilities](#capabilities) |
 | `interval` | `time.Duration` | [Control](#control) |
 | `base_backoff` | `time.Duration` | [Control](#control) |
 | `max_backoff` | `time.Duration` | [Control](#control) |
@@ -76,6 +77,7 @@ rather than repeated.
 | `api_key` | `string` | [Endpoint](#endpoint) |
 | `models` | `[]string` | [Endpoint](#endpoint) |
 | `engine` | `string` | [Endpoint](#endpoint) |
+| `workflow` | `string` | [Endpoint](#endpoint) |
 | `pool` | `string` | [Endpoint](#endpoint) |
 | `weight` | `float64` | [Endpoint](#endpoint) |
 | `priority` | `int` | [Endpoint](#endpoint) |
@@ -90,6 +92,8 @@ rather than repeated.
 | `model` | `string` | [External](#external) |
 | `api_key_file` | `string` | [External](#external) |
 | `peer` | `string` | [External](#external) |
+| `api` | `string` | [External](#external) |
+| `workflow` | `string` | [External](#external) |
 | `budgets` | `[]FacilityBudget` | [Facility](#facility) |
 | `margin` | `float64` | [Facility](#facility) |
 | `gpu_watts` | `float64` | [Facility](#facility) |
@@ -716,6 +720,14 @@ token is MaxTTFTRatio times this model's. Zero is 50, 0.05 and 1.5.
 
 `bool`
 
+### `images`
+
+`bool`
+
+Images is a model that makes pictures, asked for at
+/v1/images/generations. Implied by an external model whose API is
+ComfyUI's.
+
 ## Control
 
 ### `interval`
@@ -829,6 +841,13 @@ with one.
 Engine names the inference engine, which decides what its metrics are
 called. Empty means vLLM's names.
 
+### `workflow`
+
+`string`
+
+Workflow is the ComfyUI workflow for engine: comfyui, a built-in's
+name or its JSON; flux-schnell unless set.
+
 ### `pool`
 
 `string`
@@ -920,6 +939,23 @@ a model that federation added (`llmgw ctl federation add`) rather
 than one written by hand. Such a model is named PEER/MODEL, comes and
 goes with the peer's own list, and is sent only while the peer is up.
 
+### `api`
+
+`string`
+
+API is what the provider speaks: OpenAI's, unless this says comfyui —
+a ComfyUI server, asked for pictures at /v1/images/generations and
+sent the workflow below with the request's prompt in it. Model is then
+the checkpoint file the workflow loads, as ComfyUI lists it.
+
+### `workflow`
+
+`string`
+
+Workflow is the ComfyUI workflow, in its API format: a built-in's name
+(flux-schnell, the default, or flux-dev) or a JSON file on the control
+plane.
+
 ## Facility
 
 ### `budgets`