Borrowing it
Nothing to install: this file belongs to simota/agent-skills. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/simota/agent-skills/main/AGENTS.mdgit clone --depth 1 https://github.com/simota/agent-skillsWrote 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/instructions/simota/agent-skills/agents-md)<a href="https://agentmods.dev/instructions/simota/agent-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/simota/agent-skills/agents-md/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/instructions/simota/agent-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/simota/agent-skills/agents-md.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 | $0.02462 | $0.02462 |
| Opus 5.5 | $0.00985 | $0.00985 |
| Sonnet 5.5 | $0.00492 | $0.00492 |
| Haiku 4.5 | $0.00246 | $0.00246 |
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 7d 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 Codex CLI, Antigravity CLI (agy), Cursor, and any other tool that honors the Agentic AI Foundation AGENTS.md standard. Claude Code loads CLAUDE.md, not this file — CLAUDE.md does not import AGENTS.md, so these rules reach Claude Code sessions only where CLAUDE.md restates them.
Authority order:
AGENTS.md(this file, cross-tool common rules) → tool-specific overrides (CLAUDE.mdfor Claude Code;GEMINI.mdfor agy, if present). 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.
- 7d ago Changed · +49 tokens per session 81e55b3d2c61
- 12d ago Changed · +7 tokens per session c9454edeb618
- 17d ago Changed · +12 tokens per session 32929799f7a8
- 1mo ago Changed · -20 tokens per session f3bf62431e18
- 1mo 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 (95 stars, last pushed yesterday), licensed MIT. It adds 2,462 tokens to every session, about $0.0098 per session on Opus 5.5. 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
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
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