Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/bobmatnyc/claude-mpm-skillsnpx agentmods add skills/bobmatnyc/claude-mpm-skills/homebrew-formula-maintenanceWrote 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/bobmatnyc/claude-mpm-skills/homebrew-formula-maintenance)<a href="https://agentmods.dev/skills/bobmatnyc/claude-mpm-skills/homebrew-formula-maintenance"><img src="https://agentmods.dev/badge/skills/bobmatnyc/claude-mpm-skills/homebrew-formula-maintenance/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/bobmatnyc/claude-mpm-skills/homebrew-formula-maintenance"><img src="https://agentmods.dev/badge/skills/bobmatnyc/claude-mpm-skills/homebrew-formula-maintenance.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00034 | $0.01092 |
| Opus 5 | $0.00017 | $0.00546 |
| Sonnet 5 | $0.00007 | $0.00218 |
| Haiku 4.5 | $0.00003 | $0.00109 |
Grade A, and why
homebrew-formula-maintenance 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 9d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
- Typical command: `curl -s https://pypi.org/pypi/<package>/<version>/json`. How it starts
The opening of the file, as written. The whole thing — 120 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Homebrew Formula Maintenance
Overview
Use this workflow to keep Homebrew formulas in sync with PyPI releases for Python CLIs. The pattern in your taps is: update version + sha, refresh resource blocks when needed, run brew install/test/audit, then push the tap update (manually or via CI).
Quick Start (manual bump)
- Verify the PyPI release exists and grab the sdist URL + SHA256.
- Update the
urlandsha256in the formula. - Refresh
resourcestanzas if the formula usesvirtualenv_install_with_resources. - Test:
brew install --build-from-source+brew test+brew audit --strict. - Update changelog/tag and push the tap repo.
Local Scripts You Already Use
homebrew-claude-mpm/scripts/update_formula.sh <version>- Verifies PyPI, updates url/sha, regenerates resources, optional brew test/audit.
homebrew-claude-mpm/scripts/generate_resources.py- Emits Python dependency
resourceblocks from PyPI.
- Emits Python dependency
homebrew-claude-mpm/scripts/test_formula.sh- End-to-end brew install/test/audit/style.
mcp-vector-search/scripts/update_homebrew_formula.py- End-to-end tap update with
--dry-run,--version,--tap-repo-pathandHOMEBREW_TAP_TOKEN.
- End-to-end tap update with
Standard Workflow
1. Confirm PyPI Release
- Check the sdist is available and capture URL/SHA.
- Typical command:
curl -s https://pypi.org/pypi/<package>/<version>/json.
2. Update Formula URL + SHA
- Replace
urlandsha256inFormula/<name>.rb. - Keep the formula version implicit via the sdist URL (your taps do this).
3. Refresh Resources (Python Virtualenv Formula)
If the formula uses Language::Python::Virtualenv and virtualenv_install_with_resources:
- Regenerate
resourcestanzas after dependency changes. - Use
generate_resources.pyor equivalent; review output before pasting.
4. Test and Audit
Run these in the tap repo:
brew install --build-from-source ./Formula/<name>.rb
brew test <name>
brew audit --strict ./Formula/<name>.rb
brew style ./Formula/<name>.rb
What ships with it
1 file 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.
- 9d ago First seen · 120 lines · 34 tokens per session scan A b707e96ecb8b
homebrew-formula-maintenance is a skill published in the GitHub repository bobmatnyc/claude-mpm-skills (75 stars, last pushed 1mo ago), licensed MIT. It adds 34 tokens to every session and 1,092 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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