docs: update llms.txt with documentation index and add Playwright test

[Copilot]

GEO audit scored the docs site 0/18 on llms.txt — the existing llms.txt.ts served agent prompt links identical to agents.txt, rather than a proper documentation index.

Changes

• docs/src/pages/llms.txt.ts — Rewrites the endpoint to generate a standards-compliant llms.txt documentation index:

  • Uses getCollection('docs') to fetch all docs pages at build time
  • Groups pages into ordered sections: Introduction → Setup → Design Patterns → Guides → Reference → Experimental → Specifications → Troubleshooting
  • Each entry uses frontmatter title + description, linking to https://github.github.com/gh-aw/<id>/
  • Appends the agent prompts section (.github/aw/*.md) at the end, preserving prior content for AI agents
  • Extracts DocPageData interface to avoid repeated type assertions

• docs/tests/llms-txt.spec.ts — New Playwright test verifying /gh-aw/llms.txt returns 200, correct Content-Type, expected section headings, and well-formed - [Title](url) link lines

The existing robots.txt (in public/) and its test are unchanged.

# GitHub Agentic Workflows

> Write agentic AI workflows in natural language markdown, run as GitHub Actions.

## Introduction

- [How They Work](https://github.github.com/gh-aw/introduction/how-they-work/): ...
- [About Workflows](https://github.github.com/gh-aw/introduction/overview/): ...

## Setup
...
## Agent Prompts
- [github-agentic-workflows](https://raw.githubusercontent.com/...): ...

• Fixes [geo-optimizer] Add robots.txt and llms.txt to docs site to unlock AI bot crawl permissions #46286

[github-actions]

Great work on the llms.txt documentation index! 🚀

The PR includes a standards-compliant rewrite that properly groups docs pages into ordered sections, and adds a new Playwright test verifying the endpoint — exactly the kind of quality infrastructure improvement this project benefits from. The workflow lock file changes look like automated bumps.

This looks ready for review! ✅

Generated by ✅ Contribution Check · 84.1 AIC · ⌖ 13.8 AIC · ⊞ 6.2K · ◷