Add /llms.txt static route for LLM-friendly documentation index

[Copilot]

Adds /llms.txt endpoint that generates a plain-text documentation index from MDX sources, optimized for LLM consumption.

Implementation

• Route handler (src/app/llms.txt/route.ts): Leverages existing getDocs() utility to extract titles, descriptions, URLs, and table of contents from all documentation
• Static caching: Configured with force-static and revalidate: false to generate once at build time
• Output format: Returns text/plain with hierarchical structure suitable for context injection

Example Output

# Documentation

## pmndrs/docs

Documentation generator for `pmndrs/*` projects.

URL: /getting-started/introduction

### Table of Contents

- pmndrs/docs
- INSTALL
- Configuration
...

Housekeeping

• Added package-lock.json and next-env.d.ts to .gitignore (auto-generated artifacts)

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• codesandbox.io
  • Triggering command: /usr/local/bin/node /usr/local/bin/node /home/REDACTED/work/docs/docs/node_modules/next/dist/compiled/jest-worker/processChild.js (dns block)
• opencollective.com
  • Triggering command: /usr/local/bin/node /usr/local/bin/node /home/REDACTED/work/docs/docs/node_modules/next/dist/compiled/jest-worker/processChild.js (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

i'd like to add a /llms.txt static route that is generated on build -

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