CocoIndex Code is a command-line code-search engine that analyzes a codebase's syntax trees to find relevant code and provide it to language models. It is for developers and coding agents that need fast, context-aware codebase search, with integrations for tools such as Claude, Codex, and Cursor. The catalogue add-ons are its plugin, skill, hook, and MCP integrations for coding agents.
Borrowing it
Nothing to install: this file belongs to cocoindex-io/cocoindex-code. 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/cocoindex-io/cocoindex-code/main/CLAUDE.mdgit clone --depth 1 https://github.com/cocoindex-io/cocoindex-codeWrote 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/cocoindex-io/cocoindex-code/claude-md)<a href="https://agentmods.dev/instructions/cocoindex-io/cocoindex-code/claude-md"><img src="https://agentmods.dev/badge/instructions/cocoindex-io/cocoindex-code/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/cocoindex-io/cocoindex-code/claude-md"><img src="https://agentmods.dev/badge/instructions/cocoindex-io/cocoindex-code/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 | $0.01929 | $0.01929 |
| Opus 5.5 | $0.00772 | $0.00772 |
| Sonnet 5.5 | $0.00386 | $0.00386 |
| Haiku 4.5 | $0.00193 | $0.00193 |
Grade A, and why
cocoindex-code 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 9d 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 — 107 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
This is an AST-based semantic code search tool built on top of CocoIndex v1.
Build and Test Commands
This project uses uv for project management.
uv sync # Install all dev dependencies
uv run pytest tests/ # Run all tests
uv run pytest tests/test_settings.py # Run a single test file
uv run pytest tests/ -k test_name # Run tests matching a name
uv run mypy . # Type check Python code
uv run ruff check . # Lint
uv run ruff format . # Format
uv run prek run --all-files # Full CI suite (lint, format, mypy, pytest)
Docker E2E tests are excluded by default (need pytest -m docker_e2e to run them).
Architecture
Process Model
The tool runs as a long-lived background daemon (daemon.py) that accepts connections over a Unix socket (Windows: named pipe). The ccc CLI and MCP server communicate with it via short-lived per-request connections (client.py): connect → handshake → send one request → receive response(s) → close.
The daemon is auto-started by client.py when not running. It is restarted automatically when the global_settings.yml mtime changes (version bump or settings edit), detected via the HandshakeResponse.global_settings_mtime_us field.
The daemon idle-exits after daemon.idle_timeout_minutes (default 180, 0 = never) without client activity. A live MCP session sends heartbeats by default; users can set daemon.keep_alive_with_mcp: false to allow idle exit during a connected session. Clients transparently restart the daemon on the next real request. Graceful exits leave a last_exit marker file so the client can tell an expected exit from a crash (which triggers a loud restart, capped after consecutive crashes).
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.
- 9d ago Changed · +2 lines · +163 tokens per session 5fce2546e454
- 1mo ago First seen · 105 lines · 1,766 tokens per session scan A f28b9d779483
cocoindex-code CLAUDE.md is an instructions file published in the GitHub repository cocoindex-io/cocoindex-code (2,908 stars, last pushed 9d ago), licensed Apache-2.0. It adds 1,929 tokens to every session, about $0.0077 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.
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.
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).