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 instructions/mattpocock/skills/claude-mdgit clone --depth 1 https://github.com/mattpocock/skillsWhat 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 | $0.00923 | $0.00923 |
| Opus 5 | $0.00462 | $0.00462 |
| Sonnet 5 | $0.00185 | $0.00185 |
| Haiku 4.5 | $0.00092 | $0.00092 |
Grade A, and why
skills CLAUDE.md 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 yesterday.
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.
What it actually says
Skills are organized into bucket folders under skills/:
engineering/: daily code workproductivity/: daily non-code workflow toolsmisc/: kept around but rarely used, not promotedin-progress/: beta: public on purpose, feedback wanted, not shipped in the plugindeprecated/: no longer used
Every skill in engineering/ or productivity/ (the promoted buckets) must have a reference in the top-level README.md and an entry in .claude-plugin/plugin.json's skills array (the Claude Code plugin ships exactly the promoted set). Skills in misc/, in-progress/, and deprecated/ must not appear in either.
Install commands are copied verbatim from .agents/install-block.md. .claude-plugin/marketplace.json makes the repo its own single-plugin marketplace (a fallback the install block explains, not the documented route). Run claude plugin validate . --strict after touching either manifest. Why a Claude plugin but not (yet) a Codex one lives in .agents/adr/0002-ship-as-a-claude-code-plugin.md.
Each skill entry in the top-level README.md must link the skill name to its SKILL.md.
Each bucket folder has a README.md that lists every skill in the bucket with a one-line description, with the skill name linked to its SKILL.md. The promoted buckets' README.mds and the top-level README.md group entries into User-invoked and Model-invoked; non-promoted bucket README.mds (misc/, in-progress/) use a flat list.
Skills in engineering/ and productivity/ also have a human-facing docs page at docs/<bucket>/<skill-name>.md (the docs tree mirrors those two bucket folders under skills/). The published URL is https://aihero.dev/skills-<skill-name> regardless of bucket: the docs path is repo organisation only. When you add, rename, or change the behaviour of a skill in engineering/ or productivity/, create or re-sync its docs page following .agents/writing-docs.md. A finished page carries four sections: What it does, When to reach for it, Common questions, and It's working if. writing-docs.md holds the template, the section order, and where to hunt for the questions. Skills in the non-promoted buckets (misc/, in-progress/, deprecated/) get no docs page.
Every SKILL.md is either user-invoked (disable-model-invocation: true plus policy.allow_implicit_invocation: false in agents/openai.yaml, reachable only by the human) or model-invoked (model- or user-reachable). See .agents/invocation.md.
ask-matt is the router that maps every user-reachable skill and how they relate. The same trigger that re-syncs a docs page applies to it: whenever you add, rename, remove, or change how a user-reachable skill fits the flows, re-read ask-matt's SKILL.md and update it so the map stays accurate: a new skill it never mentions, or a stale one it still routes to, is a router that lies.
To (re)link every skill into the local harness skill directories (~/.claude/skills, ~/.agents/skills), run scripts/link-skills.sh. Each entry is a symlink into this repo, so a git pull keeps installed skills current; re-run the script after adding, removing, or renaming a skill.
No em-dashes anywhere in this repo's prose (SKILL.md files, docs, README.md, CHANGELOG.md, ADRs, changesets, code comments). Where a sentence reaches for one, rewrite it instead with a comma, colon, period, parentheses, or a conjunction, whichever the sentence actually wants; never do a blind character substitution.
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.
- yesterday First seen · 26 lines · 923 tokens per session scan A fa8a2aaf79ca
skills CLAUDE.md is an instructions file published in the GitHub repository mattpocock/skills (241,573 stars, last pushed 7d ago), licensed MIT. It adds 923 tokens to every session, about $0.0046 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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