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/checkpickerupper/skills/claude-mdgit clone --depth 1 https://github.com/CheckPickerUpper/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 | $0.00172 | $0.00172 |
| Opus 5 | $0.00086 | $0.00086 |
| Sonnet 5 | $0.00034 | $0.00034 |
| Haiku 4.5 | $0.00017 | $0.00017 |
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 2d 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.
What it actually says
Skills are organized into bucket folders under skills/:
engineering/- code, architecture, API, macro, migration, and design-decision skillsproductivity/- non-code workflow skillsmisc/- rarely used utility skillspersonal/- local-only skills that are not promotedin-progress/- drafts not ready to shipdeprecated/- retired skills
Every skill in engineering/, productivity/, or misc/ must have:
- an entry in the top-level
README.md - an entry in its bucket
README.md - an entry in
.claude-plugin/plugin.json
Skills in personal/, in-progress/, and deprecated/ must not appear in .claude-plugin/plugin.json.
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.
- 2d ago First seen · 17 lines · 172 tokens per session scan A 6fbb170fb3f5
skills CLAUDE.md is an instructions file published in the GitHub repository CheckPickerUpper/skills (6 stars, last pushed 4d ago), licensed MIT. It adds 172 tokens to every session, about $0.0009 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 2026-08-31.
Other instructions, from other repositories
canvas-mcp CLAUDE.md
Instructions for vishalsachdev/canvas-mcp, covering claude.md, canvas mcp development guide, environment setup, commands and repository structure.
canvas-mcp AGENTS.md
Instructions for vishalsachdev/canvas-mcp, covering canvas mcp - ai agent guide, quick start, authentication, local (self-hosted) and tool profile (optional).
agent-skills CLAUDE.md
Instructions for mthines/agent-skills, covering agent skills, audience, repository structure, workflow/ — end-to-end orchestrators and quality/ — code, tests, plans, ai apps.
skills CLAUDE.md
Instructions for mixedbread-ai/skills, covering mixedbread skills, repository structure, conventions, adding a new skill and testing a skill.
skills CLAUDE.md
Instructions for eagerworks/skills, covering claude.md, what this repo is, architecture, progressive disclosure (the core design principle) and the skills.
symphony CLAUDE.md
Instructions for broomva/symphony, covering claude.md - symphony, project, gathering context, commands and cli testing.