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 skills add khendzel/skills-janitor --skill janitor-valuegit clone --depth 1 https://github.com/khendzel/skills-janitorWrote 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/khendzel/skills-janitor/janitor-value)<a href="https://agentmods.dev/skills/khendzel/skills-janitor/janitor-value"><img src="https://agentmods.dev/badge/skills/khendzel/skills-janitor/janitor-value/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/khendzel/skills-janitor/janitor-value"><img src="https://agentmods.dev/badge/skills/khendzel/skills-janitor/janitor-value.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Agent Snooping · line 73 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
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 | $0.00069 | $0.01372 |
| Opus 5 | $0.00034 | $0.00686 |
| Sonnet 5 | $0.00014 | $0.00274 |
| Haiku 4.5 | $0.00007 | $0.00137 |
Grade A, and why
janitor-value scanned grade A with 1 finding 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 10d 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.
Enumerates other installed skillslowAgent snooping
Other skills' SKILL.md files reveal prompts, capabilities and secrets that should be invisible to peers.
**Solution**: The plugin is installed under a different root. Locate it with `ls ~/.claude/skills` or check the plugin cache, then run the script from its actual location. Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
How it starts
The opening of the file, as written. The whole thing — 114 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Skill Value Report
Show whether each installed skill is earning the context-window tokens it costs.
Overview
Combine token cost and usage tracking into a single view of every installed skill, sorted with the heaviest unused skills at the top. The report splits each skill's cost into what is permanently loaded (the description) and what only loads on demand (the body), then cross-references recent invocations so the user can see which skills are dead weight.
Replaces the v1.2 split between /janitor-tokens (cost only) and /janitor-usage (usage only).
Prerequisites
- Claude Code with the skills-janitor plugin installed (provides
scripts/value.sh) - bash 3.2+ (the stock macOS bash works; no external dependencies)
- Read access to
~/.claude/skills,~/.claude/agents, and local Claude Code session history - No authentication or API keys required — the script reads local files only
Instructions
Step 1: Run the value script
bash ~/.claude/skills/skills-janitor/scripts/value.sh [--weeks N] [--budget N] [--json]
--weeks N— usage lookback window (default: 4)--budget N— context window size for % calculations (default: 200000)--json— emit raw JSON
Step 2: Present the results
Show the table and summary to the user. When explaining results, do NOT describe body tokens as permanent context cost — only descriptions are always loaded. Plugin-namespaced skills appear with their full invocation name (e.g., marketing-skills:image, figma:figma-use).
Step 3: Suggest action when waste is high
If "unused skill cost" exceeds 20% of the budget, recommend the user run /janitor-report for a full health check or (in v1.4+) /janitor-swipe to triage interactively.
Output
A table of every installed skill with:
- Always — description tokens, permanently in the system prompt (the real context rent)
- Body — the rest of SKILL.md, loaded only when the skill triggers (progressive disclosure)
- Used? —
yesif invoked in the lookback window, elseNO - Last Used — date of most recent invocation
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.
- 10d ago First seen · 114 lines · 69 tokens per session scan A 1a476b42af29
janitor-value is a skill published in the GitHub repository khendzel/skills-janitor (117 stars, last pushed 29d ago), licensed MIT. It adds 69 tokens to every session and 1,372 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 1 finding (enumerates other installed skills). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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