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.
npx agentmods add skills/darkroomengineering/cc-settings/qanpx skills add darkroomengineering/cc-settings --skill qagit clone --depth 1 https://github.com/darkroomengineering/cc-settingsWhat 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 | $0.00065 | $0.03361 |
| Opus 5 | $0.00032 | $0.01681 |
| Sonnet 5 | $0.00013 | $0.00672 |
| Haiku 4.5 | $0.00006 | $0.00336 |
Grade A, and why
qa 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 3d 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 — 342 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Visual QA Validation
Use the Chrome DevTools MCP in standalone Codex only when the user configured it. Otherwise use native/manual browser screenshots and accessibility checks; if no visual capture path exists, report visual QA unavailable rather than claiming it ran. cc-settings does not auto-run unpinned registry MCP packages in Codex. Claude frontmatter does not enforce read-only behavior in Codex, so keep this workflow read-only through native tools or a read-only agent prompt.
Core Philosophy
- Screenshot first, then critique. Always look at the actual rendered output, not just the code.
- Be specific. "The spacing looks off" is useless. "The gap between the heading and paragraph is 32px but should be 16px based on the surrounding spacing rhythm" is useful.
- Prioritize impact. Not every pixel matters. Focus on what users will actually notice.
- Reference the intent. Compare against design tokens, mockups, or stated design goals.
Quick Start
The Chrome DevTools MCP exposes browser automation as tool calls. Typical sequence:
mcp__chrome-devtools__navigate_page(type: "url", url: "http://localhost:3000") — load the pagemcp__chrome-devtools__take_snapshot— text-based a11y tree with elementuids (cheap, preferred first step)mcp__chrome-devtools__take_screenshot— visual capture for review- Interact via
click/fill/hover/press_keyusing theuids from the snapshot
Review Categories (Priority Order)
1. Layout & Spacing
Check for:
- Consistent spacing rhythm (is everything on the spacing grid?)
- Alignment -- are elements that should be aligned actually aligned?
- Padding consistency within similar components
- Container widths and max-widths
- No horizontal overflow
- Responsive behavior (if multiple viewport screenshots available)
Common issues:
- Inconsistent padding in cards (e.g., 24px top, 16px sides)
- Elements slightly off-grid (15px instead of 16px)
- Text not aligned with adjacent elements
- Sections with wildly different vertical spacing
What ships with it
1 file 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.
- 3d ago First seen · 342 lines · 65 tokens per session scan A d13e3032c9ad
qa is a skill published in the GitHub repository darkroomengineering/cc-settings (42 stars, last pushed 5d ago), licensed MIT. It adds 65 tokens to every session and 3,361 once invoked, about $0.0003 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 2026-08-30.
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