Borrowing it
Nothing to install: this file belongs to AtlasDevHQ/atlas. 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/AtlasDevHQ/atlas/main/.claude/skills/impeccable/SKILL.mdgit clone --depth 1 https://github.com/AtlasDevHQ/atlasWrote 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/atlasdevhq/atlas/impeccable)<a href="https://agentmods.dev/skills/atlasdevhq/atlas/impeccable"><img src="https://agentmods.dev/badge/skills/atlasdevhq/atlas/impeccable/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/atlasdevhq/atlas/impeccable"><img src="https://agentmods.dev/badge/skills/atlasdevhq/atlas/impeccable.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 | $0.00189 | $0.02501 |
| Opus 5.5 | $0.00076 | $0.01000 |
| Sonnet 5.5 | $0.00038 | $0.00500 |
| Haiku 4.5 | $0.00019 | $0.00250 |
Grade A, and why
impeccable 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 2mo 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.
The source is not reproduced here
Licensed AGPL-3.0
The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.
What ships with it
60 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.
- reference/adapt.md 10 KB
- reference/adapt.native.md 3.8 KB
- reference/android.md 4.0 KB
- reference/animate.md 5.1 KB
- reference/audit.md 7.7 KB
- reference/audit.native.md 8.2 KB
- reference/bolder.md 3.4 KB
- reference/clarify.md 4.5 KB
- reference/colorize.md 4.4 KB
- reference/craft-floor.md 4.4 KB
- reference/craft.md 555 B
- reference/critique.md 41 KB
- reference/degraded/asset-producer.md 9.7 KB
- reference/degraded/documenter.md 3.3 KB
- reference/degraded/finish-reviewer.md 14 KB
- reference/degraded/manual-edit-applier.md 7.0 KB
- reference/delight.md 3.6 KB
- reference/distill.md 5.5 KB
- reference/doctor.md 5.3 KB
- reference/document.md 27 KB
- reference/extract.md 3.3 KB
- reference/harden.md 8.3 KB
- reference/hooks.md 12 KB
- reference/init.md 11 KB
- reference/ios.md 3.7 KB
- reference/layout.md 5.0 KB
- reference/live-setup.md 7.2 KB
- reference/live.md 35 KB
- reference/new-work.md 44 KB
- reference/onboard.md 7.6 KB
- reference/operate.md 4.0 KB
- reference/optimize.md 7.4 KB
- reference/overdrive.md 8.9 KB
- reference/polish.md 5.5 KB
- reference/quieter.md 4.7 KB
- reference/routing.md 2.8 KB
- reference/shape.md 3.5 KB
- reference/typeset.md 5.1 KB
- reference/visualize.md 16 KB
- scripts/command-metadata.json 7.7 KB
- scripts/concept-seed.mjs 39 KB runs code
- scripts/context-signals.mjs 14 KB runs code
- scripts/context.mjs 63 KB runs code
- scripts/critique-storage.mjs 8.3 KB runs code
- scripts/detect-csp.mjs 6.6 KB runs code
- scripts/detect.mjs 620 B runs code
- scripts/detector/browser/injected/index.mjs 82 KB runs code
- scripts/detector/cli/main.mjs 18 KB runs code
- scripts/detector/design-system.mjs 40 KB runs code
- scripts/detector/detect-antipatterns-browser.js 381 KB runs code
- scripts/detector/detect-antipatterns.mjs 1.8 KB runs code
- scripts/detector/engines/browser/detect-url.mjs 14 KB runs code
- scripts/detector/engines/regex/detect-text.mjs 47 KB runs code
- scripts/detector/engines/static-html/css-cascade.mjs 43 KB runs code
- scripts/detector/engines/static-html/detect-html.mjs 13 KB runs code
- scripts/detector/engines/visual/screenshot-contrast.mjs 6.4 KB runs code
- scripts/detector/findings.mjs 766 B runs code
- scripts/detector/node/file-system.mjs 7.6 KB runs code
- scripts/detector/profile/profiler.mjs 4.4 KB runs code
- scripts/detector/registry/antipatterns.mjs 27 KB runs code
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.
- 2mo ago First seen · 86 lines · 189 tokens per session scan A bf8781e00c1e
impeccable is a skill published in the GitHub repository AtlasDevHQ/atlas (1 stars, last pushed 1mo ago), licensed AGPL-3.0. It adds 189 tokens to every session and 2,501 once invoked, about $0.0008 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 2026-08-31.
impeccable compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| impeccableAtlasDevHQ/atlas | Skill | 1 | 1mo ago | AGPL-3.0 | A | 189 | Claude Code |
| business-intelligenceericrisco/rsc-harness | Skill | 503 | 2d ago | MIT | A | 90 | Claude Code, Codex |
| developing-chart-types-locallylightdash/lightdash | Skill | 6.2k | yesterday | none | A | 58 | Claude Code, Codex |
| frontend-designlightdash/lightdash | Skill | 6.2k | yesterday | none | A | 43 | Claude Code |
| dashboard-specificationnimrodfisher/data-analytics-skills | Skill | 518 | 1mo ago | MIT | A | 28 | Claude Code, Codex |
| visualization-buildernimrodfisher/data-analytics-skills | Skill | 518 | 1mo ago | MIT | A | 37 | Claude Code, Codex |
| applying-visual-identityluccapinto/agentic-data-kit | Skill | 7 | 3d ago | MIT | A | 0 | Claude Code, Codex |