Fix broken GitHub Copilot documentation link in frontmatter reference

[Copilot]

The frontmatter documentation referenced a non-existent GitHub Docs URL for the Copilot custom agents spec.

Changes

• Fixed broken external link (line 69)
  • Old: https://docs.github.com/en/copilot/reference/copilot-custom-agents-configuration → 404
  • New: https://docs.github.com/en/copilot/reference/custom-agents-configuration → 200

Path contained typo: copilot-custom-agents-configuration should be custom-agents-configuration.

Link Audit

Verified all other external links in the document:

• GitHub Actions permissions, environment, container, and service docs → working (301/200)
• All internal links → valid per starlight-links-validator

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:

• telemetry.astro.build
  • Triggering command: /opt/hostedtoolcache/node/24.13.0/x64/bin/node node /home/REDACTED/work/gh-aw/gh-aw/docs/node_modules/.bin/astro build (dns block)
  • Triggering command: /opt/hostedtoolcache/node/24.13.0/x64/bin/node node /home/REDACTED/work/gh-aw/gh-aw/docs/node_modules/.bin/astro build git conf�� slides = get && echo "******"; }; f get de_modules/.bin/node credential.userngrep (dns block)
  • Triggering command: /opt/hostedtoolcache/node/24.13.0/x64/bin/node node /home/REDACTED/work/gh-aw/gh-aw/docs/node_modules/.bin/astro build git push�� es/index.html origin modules/@npmcli/run-script/lib/node-gyp-bin/git (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

On frontmatter.md, the first link in md file https://github.com/github/gh-aw/blob/main/docs/src/content/docs/reference/frontmatter.md is broken

Custom agent used: agentic-workflows
GitHub Agentic Workflows (gh-aw) - Create, debug, and upgrade AI-powered workflows with intelligent prompt routing

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[Copilot]

Pull request overview

This PR fixes a broken external documentation link in the frontmatter reference documentation. The URL for the GitHub Copilot custom agents specification contained a typo in the path component.

Changes:

• Fixed broken GitHub Docs URL for Copilot custom agents configuration (removed copilot- prefix from path segment)

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.