Borrowing it
Nothing to install: this file belongs to 0xDarkMatter/claude-mods. 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/0xDarkMatter/claude-mods/main/AGENTS.mdgit clone --depth 1 https://github.com/0xDarkMatter/claude-modsWrote 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/0xdarkmatter/claude-mods/agents-md)<a href="https://agentmods.dev/instructions/0xdarkmatter/claude-mods/agents-md"><img src="https://agentmods.dev/badge/instructions/0xdarkmatter/claude-mods/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/0xdarkmatter/claude-mods/agents-md"><img src="https://agentmods.dev/badge/instructions/0xdarkmatter/claude-mods/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 | $0.03950 | $0.03950 |
| Opus 5.5 | $0.01580 | $0.01580 |
| Sonnet 5.5 | $0.00790 | $0.00790 |
| Haiku 4.5 | $0.00395 | $0.00395 |
Grade A, and why
claude-mods AGENTS.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 8d 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.
How it starts
The opening of the file, as written. The whole thing — 187 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agent Instructions
Project Overview
This is claude-mods - a collection of custom extensions for Claude Code. Human install and usage live in README.md; this file is for agents working on the repo.
- 3 expert agents for pure context-isolation/worker roles (git-agent, firecrawl-expert, project-organizer) - every domain-knowledge agent became an
-opsskill (v3.0, skills-first) - 3 commands for session management and git orchestration (/sync, /save, /git-ops)
- 112 skills for CLI tools, patterns, workflows and development tasks. Two routers come
first when a family is ambiguous:
parallel-ops(fleet-ops, fleet-worker, fleetflow, loop-ops, iterate, spawn) andfigma-ops(the Figma MCP skills). README.md lists them all - 13 output styles for response personality (Vesper, Spartan, Mentor, Executive, Pair, Atlas, Coach, Harbour, Meridian, Noir, Roast, Sage, Scout)
- 15 hooks: linting, formatting, dangerous-command warnings, uv enforcement,
supply-chain advisories, hidden-Unicode scans, config and worktree guards, a peer-writer
guard and touched-files ledger, pmail notifications, an opt-in WorktreeCreate/Remove pair
that honours
WORKTREE_ROOT. Plugin hooks.json wires the security set - Pigeon inter-session messaging (
pigeon send/read/reply) - SQLite-backed pmail at~/.claude/pmail.db
Key Directories
| Directory | Purpose |
|---|---|
.claude-plugin/ |
Plugin metadata (plugin.json) |
agents/ |
Expert subagent prompts (.md files) |
commands/ |
Slash command definitions |
skills/ |
Skill definitions with SKILL.md |
output-styles/ |
Response personalities (13 styles incl. vesper, atlas, noir, roast, scout) |
hooks/ |
Working hook scripts (lint, format, safety, pmail) |
rules/ |
Claude Code rules (15 files: agentic-quality, cli-tools, commit-style, deploy-gating, dev-servers, loop-engineering, modern-tools, naming-conventions, prompt-injection, public-posts, release-review, shell-preference, skill-agent-updates, supply-chain, worktree-boundaries) |
tools/ |
Modern CLI toolkit documentation |
tests/ |
Validation scripts + justfile |
scripts/ |
Install scripts |
docs/ |
Design docs and protocols, indexed one line each in docs/00_INDEX.md; to build a skill start at SKILL-CREATION-PROTOCOL.md |
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.
- 8d ago Changed · +14 lines · +431 tokens per session f657b67fe0be
- 16d ago Changed · -27 lines · -852 tokens per session 1e92dc01d4c0
- 17d ago Changed · +32 lines · +1,009 tokens per session e50b43ad36e9
- 21d ago Changed · +6 lines · +130 tokens per session e9d6664b25e3
- 22d ago Changed · +17 lines · +418 tokens per session 5e661dc765e0
- 1mo ago Changed · +8 lines · +332 tokens per session 0b9f2a7b864c
- 1mo ago First seen · 137 lines · 2,482 tokens per session scan A ab5545ae6b3c
claude-mods AGENTS.md is an instructions file published in the GitHub repository 0xDarkMatter/claude-mods (71 stars, last pushed 8d ago), licensed MIT. It adds 3,950 tokens to every session, about $0.0158 per session on Opus 5.5. 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.
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
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
deno copilot-instructions.md
Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.