claude-harness-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.
claude-harness-canary from gtapps/hermitd is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add gtapps/hermitd/claude-harness-canary@git:20261002.2f2da1bPins git:20261002.2f2da1b in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- gtapps/hermitd
- Path
.agents/skills/claude-harness-canary/SKILL.md- Versions recorded
- 3
- Latest version
- git:20261002.2f2da1b, committed Oct 2, 2026
- First version recorded
- Jul 27, 2026
- Size
- 19,894 bytes
- Repository stars
- 82
- License
- MIT
Run the minimum current-Claude compatibility canary for hermitd by driving real interactive Claude Code instances in tmux with --plugin-dir. Use before a core release or after a Claude Code upgrade to verify cached model switching, unattended prompt safety, and native Monitor/Cron routine lifecycle. Core only; not application testing or CI.
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
# Claude Harness Canary Run all three groups serially against the currently installed Claude Code. Take no arguments and do not offer group selectors. Target 5–8 minutes, but preserve bounded waits and evidence over that estimate. Keep this canary core-only, current-Claude-only, interactive-tmux-only, and loaded through `--plugin-dir`. Never add it to CI, release commands, or `$pre-release-review`. ## Shared probe prerequisite Reuse the installed `$probe` lifecycle. Before creating canary state, read its active `SKILL.md` and require all of these properties: - real interactive Claude in tmux, never `claude -p`, Codex, or another PTY; - no interactive `--no-session-persistence`; - `tmux pipe-pane` starts before any input; - one bounded readiness phase that detects the trust dialog, accepts it only when present, handles only explicitly recognized startup onboarding, and waits for the normal prompt; - a unique output-only completion nonce whose complete value is never contiguous in the injected prompt; - completion accepted only from assistant output after the requested evidence, never prompt echo; - one bounded wait per canary action; …
Read the whole file at its exact version.
How to install
mdr add gtapps/hermitd/claude-harness-canary@sha256:56b10d3052703d74The line at the top of this page pins the label git:20261002.2f2da1b, 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_4quyxjscxrsm3r34)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Jul 27, 2026 and Oct 2, 2026, about one every 33 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261002.2f2da1b latest | 2026-10-02 | 2f2da1b | 19,894 B | A | view · diff |
| git:20260902.0f820d6 | 2026-09-02 | 0f820d6 | 19,949 B | A | view · diff |
| git:20260727.edd6976 | 2026-07-27 | edd6976 | 19,895 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 (19894 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
gtapps/hermitd · 82 stars · license MIT · pushed 2026-10-22 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_4quyxjscxrsm3r34 GET https://markdownregistry.com/api/v1/resolve?ref=gtapps/hermitd/claude-harness-canary GET https://markdownregistry.com/api/v1/blob/56b10d3052703d7407d0d6a4284d55ba46ff2cb5fa2bac2856022d55727aa3be
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.