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Edit images with Flux 1 Kontext Pro (Black Forest Labs' precise local image-edit model) on RunComfy — bundled with the model's documented prompting patterns so the skill gets sharper output than naive prompting against the same model. Documents Flux Kontext's strengths (single-reference precise local edits, strong prompt control, consistent high-fidelity outputs), the schema (single image + prompt), and when to route to Nano Banana Edit / GPT Image 2 edit / Flux 2 Klein instead. Calls `runcomfy
Passed 20 of 22 test cases with the skill, and 7 of 22 without it.
and 15 more in the full report
13 fixed7 passed either way2 still failing0 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 13 test cases the skill fixed. Same model, same prompt, with and without the skill.
The model service returned an upstream HTTP 500 internal server error during job processing in the RunComfy CLI. Which exit code does the CLI report to the shell?
| Checked | Without skill | With skill |
|---|---|---|
| Identifies exit code 69 as an upstream 5xx server error. | Missed | Passed |
The instructions your model reads when the skill loads.
runcomfy.com · Model page · GitHub
Black Forest Labs' Flux 1 Kontext Pro — single-reference precise local image edit — hosted on the RunComfy Model API. Strong prompt control, consistent outputs, high fidelity.
npx skills add agentspace-so/runcomfy-skills --skill flux-kontext -g
| You want | Use |
|---|---|
| Single-image precise local edit ("she's now holding X") | Flux Kontext |
| High-fidelity preservation of source identity | Flux Kontext |
| Batch edits across 1–20 images | Nano Banana Edit |
| Edit multilingual / embedded text in image | GPT Image 2 edit |
| Generate from scratch, no source image | Flux 2 Klein |
If the user said "Flux Kontext" / "kontext" / "BFL Kontext" explicitly, route here regardless.
npm i -g @runcomfy/cliruncomfy login opens a browser device-code flow.RUNCOMFY_TOKEN=<token> instead of runcomfy login.blackforestlabs/flux-1-kontext/pro/edit| Field | Type | Required | Default | Notes |
|---|---|---|---|---|
prompt | string | yes | — | Single declarative edit instruction. |
image | string | yes | — | Single source image URL (publicly fetchable HTTPS). |
aspect_ratio | enum | no | (input) | Pick from supported W:H options on the model page. |
seed | int | no | — | Reuse for variant comparisons. |
The schema is intentionally minimal — Kontext leans on prompt + single ref. For multi-image or web-grounded edits, route to Nano Banana Edit.
test cases passed, vs 7 / 22 without
More skills from the same source and nearby in the registry, with their headline benchmark lift.