Arch Index

Arch Index is an Automation skill for Claude Code, published by coco-research in coco.

218 stars11 forkson coco-research/cocoAdded 2026/09/04Repository updated 2026/09/03

agent-skillsagents-mdaiai-agentsclaude-codecodexcursordeveloper-toolsllm-toolsmcppm-toolsproduct-managementproductivityprompt-engineeringworkflow-automation

Install in seconds

Install Arch Index

Copy Arch Index into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.

terminal

npx degit https://github.com/coco-research/coco/tree/main/skills/arch-index ~/.claude/skills/arch-index

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/coco-research/coco.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file: skills/arch-index/SKILL.md in coco-research/coco
Installs to: ~/.claude/skills/arch-index
Collection: One of 25 skills cataloged from this repository
Category: Automation — 1860 skills

What Arch Index does

Arch Index builds and validates .arch/index.json, a commit-pinned map from architectural components to the real files that implement them. It is used to find component implementation files and detect when architecture docs drift from the code.

Arch Index is cataloged under Automation on DirSkills. Arch Index comes from a repository tagged agent-skills, agents-md, ai, ai-agents and claude-code.

Documentation

README

Excerpt

arch-index

Produces one artifact: .arch/index.json, a commit-pinned map from each architectural component of a repository to the real directories and files that implement it. Every claimed path is verified to exist by a script with an exit code, not by a promise in a prompt.

Guiding principle — Paths or it does not exist. The protocol that consumers follow is team:architecture.md. This file is the producer.

What this skill is for, and what it is not for

It is for answering, mechanically: which files implement this component, and has that stopped being true.

This is the opening of the README. Read the full README on GitHub.

Commands Arch Index provides

Slash commands named in this skill’s SKILL.md, listed in the order they first appear.

/team

Frequently asked about Arch Index

What else does coco-research publish alongside Arch Index?
Arch Index is one of 25 skills that DirSkills catalogs from coco-research/coco, the repository it ships in. Its siblings there include AI Marketing Videos, AI Product Development and API Design Principles. Each one is a separate skill with its own page in this directory, installs the same way Arch Index does, and is maintained by coco-research in that same repository. The rest of the collection is listed on the coco-research/coco page.
How does Arch Index compare to other Automation skills?
Arch Index ranks #1629 by stars among the 1860 Automation skills in this catalog. The most-starred ones next to it are Autonomous Loops, Autonomous Agent Harness and Automation Audit Ops. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of Arch Index against them. Open each page to compare what they document and how they install.