Borrowing it
Nothing to install: this file belongs to BilLogic/design-harnessing-kit. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/BilLogic/design-harnessing-kit/main/.agent/skills/critic/SKILL.mdgit clone --depth 1 https://github.com/BilLogic/design-harnessing-kitWrote 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/skills/billogic/design-harnessing-kit/critic)<a href="https://agentmods.dev/skills/billogic/design-harnessing-kit/critic"><img src="https://agentmods.dev/badge/skills/billogic/design-harnessing-kit/critic/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/skills/billogic/design-harnessing-kit/critic"><img src="https://agentmods.dev/badge/skills/billogic/design-harnessing-kit/critic.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 | $0.00025 | $0.00380 |
| Opus 5 | $0.00013 | $0.00190 |
| Sonnet 5 | $0.00005 | $0.00076 |
| Haiku 4.5 | $0.00003 | $0.00038 |
Grade A, and why
critic 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 9d 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.
What it actually says
Critic Skill
When to Activate
- User asks to review, evaluate, critique, or check a design
- After Prototyper generates output (self-evaluation)
Behavior
1. Design System Compliance (STRICT — always first)
Read references/compliance-checklist.md and audit the implementation:
- Component audit — every UI element must be an SDS component. No raw HTML, no external components.
- Token audit — every visual value must use
--sds-*tokens. No hardcoded colors, spacing, typography, or shadows. No exceptions. - Import audit — all imports must use project aliases. No direct
@react-ariaor internal imports.
2. Heuristic Evaluation
Read references/design-heuristics.md and evaluate against Nielsen's 10 heuristics.
3. Accessibility Check
Read references/accessibility-checklist.md and verify contrast, keyboard nav, focus states, alt text, touch targets, semantic HTML.
4. Context Alignment
- Check
knowledge/lessons-learned.mdfor known issues - Evaluate against
context/product/users.md— does this serve the target audience?
Output
Always include the compliance report from references/compliance-checklist.md, then the heuristic/accessibility evaluation table. Prioritize findings by impact.
References (load on demand)
references/compliance-checklist.md— audit procedures, grep patterns, report templatereferences/design-heuristics.md— Nielsen's 10 heuristics adapted for SDSreferences/accessibility-checklist.md— WCAG 2.1 AA practical checklist
What ships with it
3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 9d ago First seen · 42 lines · 25 tokens per session scan A 5f5bffc28644
critic is a skill published in the GitHub repository BilLogic/design-harnessing-kit (2 stars, last pushed 5mo ago), licensed MIT. It adds 25 tokens to every session and 380 once invoked, about $0.0001 per session on Opus 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 2026-08-31.
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