rot-canary SKILL.md skillA
This file is byte-identical to the first copy the registry indexed. Same content hash, so the same checks give both the same grade.
rot-canary from thecolliery/coalmine is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add thecolliery/coalmine/rot-canary@git:20261016.fe3af26Pins git:20261016.fe3af26 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- thecolliery/coalmine
- Path
skills/rot-canary/SKILL.md- Versions recorded
- 8
- Latest version
- git:20261016.fe3af26, committed Oct 16, 2026
- First version recorded
- Sep 3, 2026
- Size
- 9,136 bytes
- Repository stars
- 14
- License
- Apache-2.0
Code-health scan — dead code, bug-prone logic, resource leaks, concurrency bugs, silent failures, input-boundary issues, doc rot. Triggers on: "/rot-canary", "rot-canary", "code-health" (legacy aliases: "/rotcanary", "rotcanary"). Auto-runs at session end on touched files (QUICK, report only) via platform hooks — auto-wired by the Claude Code plugin, manual elsewhere. Run manually for fix mode. Reports; fixes on request via choice-gated menu.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Rot-Canary <!-- SHARED:LANGUAGE_HEADER --> Scan code for rot. Report CONFIRMED findings. Fix on request. ## Parameters - **SCOPE:** touched files (default) | diff | named files | whole repo. Touched-files scan is hybrid-capped: all if ≤ `autoScanFileCap`, else the `autoScanFileCapSlice` most-recently-modified files (warn the user). A touched file matching `scanExcludePaths` (lab/throwaway tooling only — never shipped/tracked source) is dropped before the cap; the nudge notes the skip count. - **DISCLOSE EVERY SCOPE CUT, always — a suppressed finding must never look like an absent one.** Whenever the scope you actually scanned is narrower than the scope you were asked for, say so IN THE REPORT, with the COUNT and the KNOB that did the cutting: files dropped by `scanExcludePaths`, files left unscanned by the `autoScanFileCap` slice, file types outside `watchedExtensions`. State it even when the scan found nothing — that is exactly the case where the omission is invisible, because "scanned, clean" and "never scanned" read identically to a user. **If EVERY file in scope was cut, that is not a clean report: say plainly that no scan ran, and name what cut it.** **`scanEverything… …
Read the whole file at its exact version.
How to install
mdr add thecolliery/coalmine/rot-canary@sha256:2f003547a7909a61The line at the top of this page pins the label git:20261016.fe3af26, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_aq7cfmyohtyxfrv5)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 8 versions of this file, between Sep 3, 2026 and Oct 16, 2026, about one every 6 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261016.fe3af26 latest | 2026-10-16 | fe3af26 | 9,136 B | A | view · diff |
| git:20261016.edb688a | 2026-10-16 | edb688a | 8,866 B | A | view · diff |
| git:20261009.17ca0f7 | 2026-10-09 | 17ca0f7 | 8,132 B | A | view · diff |
| git:20260922.b3be1e7 | 2026-09-22 | b3be1e7 | 7,884 B | A | view · diff |
| git:20260922.948eedb | 2026-09-22 | 948eedb | 7,763 B | A | view · diff |
| git:20260922.eb07a05 | 2026-09-22 | eb07a05 | 7,690 B | A | view · diff |
| git:20260921.e8bc57e | 2026-09-21 | e8bc57e | 7,600 B | A | view · diff |
| git:20260903.62a3b91 | 2026-09-03 | 62a3b91 | 7,559 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (9136 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
thecolliery/coalmine · 14 stars · license Apache-2.0 · pushed 2026-10-19 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_aq7cfmyohtyxfrv5 GET https://markdownregistry.com/api/v1/resolve?ref=thecolliery/coalmine/rot-canary GET https://markdownregistry.com/api/v1/blob/2f003547a7909a61c7e0152b14d334178a06673f6652bb0a4268323cc5aecee1
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
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