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/simota/agent-skills/agents-mdgit clone --depth 1 https://github.com/simota/agent-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 | $0.02414 | $0.02414 |
| Opus 5 | $0.01207 | $0.01207 |
| Sonnet 5 | $0.00483 | $0.00483 |
| Haiku 4.5 | $0.00241 | $0.00241 |
Grade B, and why
agent-skills AGENTS.md scanned grade B 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 3d 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.
Reads agent configuration directoriesmediumAgent snooping
.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.
- Do not commit credentials, API keys, or OAuth tokens. The repository explicitly excludes `~/.codex/auth.json`, `~/.gemini/` auth tokens, `~/.claude/credentials.json` from any audit or read. How it starts
The opening of the file, as written. The whole thing — 143 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md — claude-skills
Cross-tool agent instructions for this repository. Read by Antigravity CLI (agy), Claude Code, Cursor, and any other tool that honors the Agentic AI Foundation AGENTS.md standard.
Authority order:
AGENTS.md(this file, cross-tool common rules) → tool-specific overrides (CLAUDE.mdfor Claude Code,GEMINI.mdfor agy). Tool-specific files should contain only deltas, not duplicates.
Repository Purpose
claude-skills is a prompt engineering repository of 90 global specialist skill agents plus 3 repository-local operating extensions. The deliverables are SKILL.md files (not application code). Global skills live at <skill-name>/SKILL.md; project-local skills are mirrored under .claude/skills/ and .agents/skills/.
Language Policy
- Conversation / explanations / summaries: 日本語 (Japanese).
- Code, identifiers, APIs, commit messages, protocol markers, schema keys, technical terms, CLI commands, file paths, hashes: English.
- Output language follows the CLI global config (
settings.jsonlanguagefield,CLAUDE.md,AGENTS.md, orGEMINI.md).
Repository Structure
| Path | Purpose |
|---|---|
<skill-name>/SKILL.md |
Each specialist agent's main definition (frontmatter: name + description only) |
<skill-name>/reference/ |
Optional supporting docs the skill loads on demand |
.claude/skills/, .agents/skills/ |
Mirrored project-local extensions; registry and fallback contract: _common/PROJECT_LOCAL_SKILLS.md |
_common/ |
Shared protocols affecting all skills — modify with care |
_common/CLI_COMPATIBILITY.md |
Cross-CLI compatibility matrix (Claude Code / Codex CLI / agy) |
_common/BOUNDARIES.md |
Centralized agent-role boundaries |
_common/GIT_GUIDELINES.md |
Commit / PR conventions (authoritative) |
_common/HANDOFF.md |
Inter-agent handoff schema |
_common/SECURITY.md |
Supply-chain trust boundary (skills/plugins — not application security) |
_common/CODE_QUALITY.md |
7-axis quality bar for code-writing skills (solid / secure / readable / maintainable / testable / performant / scalable) + CODE_QUALITY_GATE |
_templates/SKILL_TEMPLATE.md |
Starting template for new skills |
.agents/ |
Per-skill journals + project log (gitignored) |
docs/audit/ |
The only write target for report-only recipes (verity, abide) — gitignored; audit output is never committed, results go to the commit message and the conversation |
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.
- 3d ago First seen · 143 lines · 2,414 tokens per session scan B ef13cc3cd012
agent-skills AGENTS.md is an instructions file published in the GitHub repository simota/agent-skills (75 stars, last pushed 9d ago), licensed MIT. It adds 2,414 tokens to every session, about $0.0121 per session on Opus 5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other instructions, from other repositories
rapid-domain-mastery AGENTS.md
Instructions for Emily2040/rapid-domain-mastery, covering repository purpose, source of truth, how to work in this repo, guidance for agents and editing rule.
rapid-domain-mastery copilot-instructions.md
Instructions for Emily2040/rapid-domain-mastery: This repository contains a portable agent skill called rapid-domain-mastery.
rapid-domain-mastery CLAUDE.md
Instructions for Emily2040/rapid-domain-mastery, covering claude code compatibility and when to use the rapid-domain-mastery skill.
rapid-domain-mastery GEMINI.md
Instructions for Emily2040/rapid-domain-mastery, covering gemini cli / antigravity compatibility, use this context for, preferred workflow, routing hint and keep this file lean.
ProductionOS CLAUDE.md
Instructions for ShaheerKhawaja/ProductionOS, covering productionos 2.0.0-beta.1 — 10 composites, capabilities, core systems, self-evaluation and design & ux.
rapid-domain-mastery rapid-domain-mastery.instructions.md
Apply the rapid-domain-mastery workflow when the task is source-heavy learning, domain mapping, debate analysis, or oral-exam prep.