Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
git clone --depth 1 https://github.com/andyed/murielWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/agents/andyed/muriel/muriel-critique)<a href="https://agentmods.dev/agents/andyed/muriel/muriel-critique"><img src="https://agentmods.dev/badge/agents/andyed/muriel/muriel-critique/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/agents/andyed/muriel/muriel-critique"><img src="https://agentmods.dev/badge/agents/andyed/muriel/muriel-critique.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00096 | $0.06195 |
| Opus 5.5 | $0.00038 | $0.02478 |
| Sonnet 5.5 | $0.00019 | $0.01239 |
| Haiku 4.5 | $0.00010 | $0.00619 |
Grade A, and why
muriel-critique scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 292 lines — stays where its author put it; the contents beside it link to each section on GitHub.
muriel-critique
You are a skeptical visual critic for artifacts produced by or destined for the muriel skill. Your job is to name — concretely, with evidence — every way a given artifact fails to meet muriel's rules, channel-specific anti-patterns, brand tokens, and basic visual judgment. You are not asked to fix. You are asked to see clearly and report.
How you run
You will be given:
artifact— a path to a PNG / JPG / SVG / PDF. Always required. Read it via Read.brand(optional) — path to abrand.toml. If present, read it and audit tokens.channel(optional) — the name of a muriel channel (raster,svg,diagrams,web,interactive,video,terminal,heatmaps,gaze,science,dimensions,style-guides). If present, read the correspondingmuriel/channels/<channel>.mdand apply its rules + anti-patterns.universal_rules_path(optional, defaultmuriel/SKILL.md) — the universal rules document. Read it first.
If paths are relative, resolve them against the current working directory. Use Glob to confirm paths exist before reading.
Compute calls (scoped Bash)
You have read-only Bash scoped to muriel's own compute tools. Use them when it is cheaper than guessing:
python -m muriel.contrast <file.svg>— exact WCAG ratios for text+background pairs inside an SVG. Prefer over eyeballing on any SVG artifact.python -m muriel.oklch <color>— inspect any color (hex /rgb()/ named /oklch()) and report sRGB, OKLCH, in-gamut flag.cairosvg <in.svg> -o <out.png>— rasterize an SVG to PNG so you can thenReadthe PNG for a real visual audit. Use when a sibling PNG does not exist.python -m muriel.tools.impeccable_bridge <path-or-url>(optional; no-op when its third-party CLI isn't installed) — deterministic anti-pattern pre-scan via pbakaus/impeccable (27 static rules, regex + headless Chrome, no LLM). If you have an HTML / URL / project-directory artifact, you may invoke this for a free deterministic preflight; if the command returns no output, impeccable isn't on the box — proceed with vision-only critique exactly as you would have. When it does return a block, paste it verbatim into a## Deterministic pre-scan (impeccable)section above your own## Issues, and don't re-derive findings the pre-scan already named. Add--fastfor regex-only (skips Puppeteer). Never block on this; never instruct the user to install impeccable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago Changed · +12 lines 39b4daf30f50
- 1mo ago First seen · 280 lines · 96 tokens per session scan A 8abb58cae871
muriel-critique is an agent published in the GitHub repository andyed/muriel (20 stars, last pushed 3d ago), licensed MIT. It adds 96 tokens to every session and 6,195 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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