> ## Documentation Index
> Fetch the complete documentation index at: https://comfyui-mcp.artokun.io/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# kitchen and panel_kitchen

> See what comfy-kitchen can do on this GPU, find where the open graph is leaving it on the table, and apply the faster path with proof.

# kitchen and panel\_kitchen

[comfy-kitchen](https://github.com/Comfy-Org/comfy-kitchen) is ComfyUI's kernel library — fp8 / NVFP4 / MXFP8 / INT8 quantized tensors and GEMMs, fused RoPE and AdaLN, and its own INT8 attention, with `hip` / `cuda` / `triton` / `eager` backends. It is not a workflow library.

Two tools share the same actions:

* **`kitchen`** `{ action: "status" | "assess" | "apply" }` — MCP clients. `assess` takes a workflow JSON.
* **`panel_kitchen`** — the same actions against the live canvas, fenced like every other panel mutation.

A failed probe is **unknown**, never a no. A recommendation fires only when every fact it needs is known.

## status — what this GPU can run

`status` reports:

| Field                            | Meaning of `unknown`                                                                                                                                       |
| -------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `present`                        | No version line, no `comfy_package_versions[comfy-kitchen]`, and no import probe. Not a report that kitchen is missing.                                    |
| `version`                        | Kitchen is present but the version token was not in the log, packages, or probe.                                                                           |
| `backends.hip/cuda/triton/eager` | No `Found comfy_kitchen backend …` line and no `ck.list_backends()` probe.                                                                                 |
| `attention.ck`                   | Need **both** `--use-ck-attention` in argv **and** `Using Comfy Kitchen attention` in the log. A missing log line is not a no.                             |
| `gpu.fp8`                        | SM ≥ 8.9 (Ada). Unknown when the GPU name is not in the known table and there is no compute-capability probe.                                              |
| `gpu.nvfp4` / `gpu.mxfp8`        | SM ≥ 10.0 (Blackwell). Same unknown rule.                                                                                                                  |
| `gpu.int8Attention`              | `ck.int8_attention_is_available()` was not probed (remote, no python, or timeout).                                                                         |
| `flagSupport.ckAttention`        | `comfy/cli_args.py` was not readable and argv does not already carry `--use-ck-attention`. A June ComfyUI checkout pins kitchen 0.2.10 and lacks the flag. |
| `model.quant`                    | Remote session, or `COMFYUI_PATH` unset, or the safetensors header was unreadable. Filename is not used as a substitute.                                   |

**Local vs remote.** `--comfyui-url` / Comfy Cloud gets log + `/system_stats` only. The import probe and `model.quant` stay `unknown` there; the tool says so rather than guessing from the filename.

## assess — four recommendations

`assess` walks UNETLoaders. Each rec is a conjunction:

| id prefix              | Facts that must all be known                                                                                                                                                | Change                                                       |
| ---------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------ |
| `fp8_unet_fast:<node>` | kitchen present, GPU fp8, `weight_dtype` is `default`, file quant is unquantized (`none`)                                                                                   | set `weight_dtype` to `fp8_e4m3fn_fast`. Widget, no restart. |
| `ck_attention`         | `--use-sage-attention` absent, sageattention **not** installed (a log import-failure or a trusted probe, not silence), kitchen present, INT8 available, flag not already on | add `--use-ck-attention`. Restart, `confirm: true`.          |
| `nvfp4_swap:<node>`    | GPU nvfp4, loader is bf16/fp8, an NVFP4 sibling of that filename is **already listed** locally                                                                              | swap `unet_name`. No download guess.                         |
| `triton_backend`       | ROCm host, kitchen present, triton ≥ 3.7, `--enable-triton-backend` not on argv                                                                                             | add `--enable-triton-backend`. Restart, `confirm: true`.     |

MXFP8, SVDQuant, and AWQ appear in `status` but are not recommended until a loader path in ComfyUI exposes them.

## apply — change, then prove or revert

* **Widget recs** (`fp8_unet_fast`, `nvfp4_swap`) do not need `confirm`. `kitchen` mutates the supplied workflow JSON. `panel_kitchen` writes through `graph_set_widget` (Ctrl+Z).
* **Flag recs** need `confirm: true`. `restart_comfyui` / `panel_restart_comfyui` **replay the previous argv** and do not inject a new flag. Apply names the flag and tells you to add it to the launch line, then restart. That is not a new restart path.
* **Proof.** `panel_kitchen apply` queues a `panel_run` on the current seed after a widget change. The report shape is `s/it A → B, peak VRAM C → D GB, output non-black, N widget changed, M flags changed`. A black or NaN after-run, or a slower after-run, **reverts** the widget. `kitchen apply` without a runner reports `proof.status: "not_run"` rather than claiming a bench it did not run.
* Pass `skip_proof: true` on `panel_kitchen` to apply without queueing a run.

## Proactive hint

Once per process, when kitchen is present and rec 1 or rec 2 is certain, `status` / `assess` includes one sentence naming the gap and the tool. Nothing runs unasked.

## Flags this tool can name

`--use-ck-attention`, `--enable-triton-backend`, `--disable-triton-backend`, `--fast fp8_matrix_mult`, `--fast cublas_ops`. On master these are ComfyUI flags. `--enable-triton-backend` is **not** SwarmUI-only.