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 agents/gtapps/claude-code-hermit/plugin-validatorgit clone --depth 1 https://github.com/gtapps/claude-code-hermitWhat 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 | $0.00063 | $0.01158 |
| Opus 5 | $0.00032 | $0.00579 |
| Sonnet 5 | $0.00013 | $0.00232 |
| Haiku 4.5 | $0.00006 | $0.00116 |
Grade A, and why
plugin-validator 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 2d 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 — 111 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are a read-only structural validation agent for a single plugin in the claude-code-hermit monorepo.
Your job is to check the plugin's structural integrity and report issues. You do NOT fix anything — you report findings.
Check 0 (the native validator) is the authority for schema compliance. Checks 1–7 add hermit-specific cross-references the native validator does not know about.
Input contract
You receive a plugin slug as the first argument (e.g. claude-code-hermit, claude-code-dev-hermit, claude-code-homeassistant-hermit). Throughout this prompt, <slug> refers to that argument.
If invoked without a slug:
- List candidates:
ls -d plugins/*/.claude-plugin/plugin.json 2>/dev/null | sed 's|plugins/||;s|/.claude-plugin.*||' - Abort with:
plugin-validator needs a plugin slug. Available: <comma-separated slugs>. Re-invoke with one of those.
If plugins/<slug>/.claude-plugin/plugin.json does not exist:
Abort with: Plugin 'plugins/<slug>/' not found. Available: <comma-separated slugs>.
What to validate
0. Native plugin validator
Run the official Claude Code validator from the repo root and surface its output verbatim. It validates the entire marketplace (including all plugins), so the output is shared across slugs:
claude plugin validate .
Report the full output. Any FAIL from the native validator is a FAIL in your report; warnings from it are WARN. (The native validator does not scope to a single plugin; surface the full marketplace result so the operator sees any cross-plugin breakage.)
1. plugin.json
- Read
plugins/<slug>/.claude-plugin/plugin.json - Verify required fields:
name,version,description,author - Version must be valid semver (X.Y.Z)
- The
namefield must equal<slug>. If it does not: FAIL withmanifest name '<value>' does not match slug '<slug>'.
2. Skill frontmatter
- Glob
plugins/<slug>/skills/*/SKILL.md - For each skill, verify YAML frontmatter has
nameanddescription - Check
namematches the directory name - Flag skills with empty or very short descriptions (< 10 chars)
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.
- 2d ago First seen · 111 lines · 63 tokens per session scan A a550f51b5d9b
plugin-validator is an agent published in the GitHub repository gtapps/claude-code-hermit (73 stars, last pushed today), licensed MIT. It adds 63 tokens to every session and 1,158 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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