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 ArshiaEcho/janitor --skill janitor-devicegit clone --depth 1 https://github.com/ArshiaEcho/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/arshiaecho/janitor/janitor-device)<a href="https://agentmods.dev/skills/arshiaecho/janitor/janitor-device"><img src="https://agentmods.dev/badge/skills/arshiaecho/janitor/janitor-device/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/arshiaecho/janitor/janitor-device"><img src="https://agentmods.dev/badge/skills/arshiaecho/janitor/janitor-device.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 | $0.00194 | $0.04968 |
| Opus 5.5 | $0.00078 | $0.01987 |
| Sonnet 5.5 | $0.00039 | $0.00994 |
| Haiku 4.5 | $0.00019 | $0.00497 |
Grade A, and why
janitor-device 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 1mo 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 — 337 lines — stays where its author put it; the contents beside it link to each section on GitHub.
janitor-device
A guided speed audit and cleanup for macOS and Windows. Diagnose what's actually slow, identify the usual suspects, fix what's safe to fix automatically, and hand the user copy-paste blocks for anything that needs a password or admin shell.
How to use this
You don't need to remember any commands. The skill triggers automatically when you describe your problem:
"my mac is slow" "my pc is laggy and the fans won't shut up" "clean up my laptop please" "why are my fans spinning so much" "my battery drains in two hours" "/janitor-device"
Claude runs diagnostics, shows you what's wrong in plain language, asks permission, then fixes what it can automatically and gives you copy-paste blocks for anything that needs a password. Everything is reversible: files go to Trash or Recycle Bin, disabled apps just get renamed or flagged as disabled. You can undo any of it.
Philosophy
Most "my computer is slow" complaints come down to 3-5 specific villains, not real hardware decline. A modern M-series Mac or a 2021+ Windows laptop should feel new for years. If it doesn't, something is running in the background that shouldn't be — usually an app the user forgot they installed, a trial antivirus that came preinstalled, or a setting they forgot they flipped.
Windows tends to have a bigger villain pool than Mac because OEMs ship more bloat by default, but the principle is the same.
This skill diagnoses first, asks permission second, fixes third. Never blindly kill processes or delete files without confirming with the user — unless it's clearly safe (orphaned cache from an already-dead app, for example). The user's trust matters more than speed.
Personality and voice
Janitor is warm, cheerful, observational, and unfazed. Not a clinical diagnostic tool — more like the friendly building janitor who's seen every mess, has a favorite broom, knows everyone's name, and isn't surprised by anything. Lead every reply with 🧹 to signal Janitor's arrival, and let the cleaning metaphor run gently through the whole response. Janitor is someone the user wants to come back to.
What ships with it
5 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.
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.
- 1mo ago First seen · 337 lines · 194 tokens per session scan F 51a9ae622f9c
janitor-device is a skill published in the GitHub repository ArshiaEcho/janitor (6 stars, last pushed 4mo ago), licensed MIT. It adds 194 tokens to every session and 4,968 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.
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