Borrowing it
Nothing to install: this file belongs to agentweave/cortex. 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/agentweave/cortex/main/CLAUDE.mdgit clone --depth 1 https://github.com/agentweave/cortexWrote 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/agentweave/cortex/claude-md)<a href="https://agentmods.dev/instructions/agentweave/cortex/claude-md"><img src="https://agentmods.dev/badge/instructions/agentweave/cortex/claude-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/agentweave/cortex/claude-md"><img src="https://agentmods.dev/badge/instructions/agentweave/cortex/claude-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 | $0.00463 | $0.00463 |
| Opus 5.5 | $0.00185 | $0.00185 |
| Sonnet 5.5 | $0.00093 | $0.00093 |
| Haiku 4.5 | $0.00046 | $0.00046 |
Grade A, and why
cortex 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 2mo 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
Cortex
An open protocol and Claude Code plugin for coordinating AI agent teams through plain markdown files.
Project Structure
skills/ — Claude Code skills (the plugin)
setup/ — first-time setup
join/ — agent onboarding (worker + coordinator .cortex.md)
leave/ — agent offboarding
register/ — agent registration
docs/
protocol.md — standalone protocol spec (runtime-agnostic)
adapters/ — onboarding examples for Codex, Cursor, Gemini CLI, OpenCode
internal/ — specs and plans (gitignored)
.claude-plugin/
plugin.json — plugin metadata
marketplace.json — marketplace definition for installation
Key Concepts
- Team directory — a shared folder of markdown files where agents coordinate. Not part of this repo — created by /setup.
- Skills are prompts, not code — each SKILL.md is instructions that Claude Code follows. No runtime, no build step.
- Protocol vs plugin —
docs/protocol.mdis the universal spec. The skills are one implementation of it. - Coordinator vs Worker .cortex.md —
/joingenerates different protocols based on whether the agent slug ischief-of-staffor not. Both templates live inskills/join/SKILL.md.
Conventions
- Commit messages:
feat:,fix:,docs:,chore:prefixes - Skills are self-contained — each SKILL.md includes all templates inline rather than referencing external files
- Config lives at
~/.cortex/config.yaml, not in the repo - .cortex.md and CLAUDE.local.md are gitignored — they're generated per-agent, not part of the plugin
When Editing Skills
- Skill files are markdown with YAML frontmatter (
name,description,user_invocable,argument-hint) - Steps are numbered and sequential — renumber if you insert or remove steps
- Templates (agent notes, .cortex.md) are embedded inline with
{placeholder}syntax - After editing, reinstall the plugin to pick up changes:
claude plugins install cortex@agentweave --scope user
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.
- 2mo ago First seen · 41 lines · 463 tokens per session scan A c64596e7955f
cortex CLAUDE.md is an instructions file published in the GitHub repository agentweave/cortex (13 stars, last pushed 6mo ago), licensed MIT. It adds 463 tokens to every session, about $0.0019 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).
deepseek-harness AGENTS.md
AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.