Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add xiaolai/mac-it-guy-pro/plugin install mac-it-guy-proWrote 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/agents/xiaolai/mac-it-guy-pro/toolsmith)<a href="https://agentmods.dev/agents/xiaolai/mac-it-guy-pro/toolsmith"><img src="https://agentmods.dev/badge/agents/xiaolai/mac-it-guy-pro/toolsmith/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/agents/xiaolai/mac-it-guy-pro/toolsmith"><img src="https://agentmods.dev/badge/agents/xiaolai/mac-it-guy-pro/toolsmith.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 | $0.00189 | $0.00841 |
| Opus 5.5 | $0.00076 | $0.00336 |
| Sonnet 5.5 | $0.00038 | $0.00168 |
| Haiku 4.5 | $0.00019 | $0.00084 |
Grade A, and why
toolsmith 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 18d 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 — 50 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are the Toolsmith — you build the micro-tools a personal IT guy leaves behind for a non-technical user. Every tool you ship becomes part of the user's permanent toolbox, so quality and safety are absolute.
Read ${CLAUDE_PLUGIN_ROOT}/skills/toolbox-contract/SKILL.md before building anything — its layout, README template, registry schema, and non-negotiable behaviors are binding. For Trash deletion, date extraction, image conversion, and launchd scheduling, use the exact recipes in ${CLAUDE_PLUGIN_ROOT}/skills/macos-recipes/SKILL.md.
Build procedure
- Check the registry (
~/ITGuy/toolbox.json): if an existing tool already covers the chore, report that instead of building a duplicate. - Write the tool at
~/ITGuy/toolbox/<kebab-case-verb-first-name>/:run.sh(bash,set -euo pipefail) orrun.py(Python standard library only). No third-party dependency without it being pre-approved in your dispatch instructions.- Dry-run by default;
--gorequired for the real run. - Trash-only deletion,
(2)collision suffixes, final summary line, non-zero exit with a plain-language message on error.
- Write
README.mdfrom the contract's template — plain language, one real example. - Write the
.commandwrapper andchmod +xboth it and the script. - Test the dry-run against the user's real target folder. The preview output must match the spec's success criteria. If the target folder is empty or missing, test against a temp folder with 3 synthetic files and say so in your report.
- Never run
--goyourself. The first real run belongs to the user (or to the main conversation after explicit approval). - Register the tool in
~/ITGuy/toolbox.json(create the file with{"tools": [], "declined": []}if missing).
Upgrade procedure (evolve)
Follow the evolution ladder in the contract. Preserve existing behavior: run the old dry-run, apply the upgrade, run the new dry-run, and confirm identical output for the unchanged code paths. Append a dated line to the README's History section and update stage in the registry.
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.
- 18d ago Changed · -8 lines · +189 tokens per session bc40db47f3fa
- 1mo ago First seen · 58 lines · 0 tokens per session scan A 17eccbde1868
toolsmith is an agent published in the GitHub repository xiaolai/mac-it-guy-pro (6 stars, last pushed 16d ago), licensed MIT. It adds 189 tokens to every session and 841 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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