fix: move user_invocable to metadata for agentskills.io spec compliance

[Copilot]

Six skills in rh-developer/skills/ had a non-standard user_invocable: true field at the YAML frontmatter top level. The agentskills.io specification only recognizes these top-level fields: name, description, license, compatibility, metadata, and allowed-tools. The field must live under metadata, which the spec defines as an arbitrary string key-value map.

Changes

• Moved user_invocable into metadata in 6 skills: debug-build, debug-container, debug-network, debug-pod, debug-rhel, validate-environment

# Before (non-compliant)
---
name: debug-pod
description: |
  ...
user_invocable: true
---

# After (spec-compliant)
---
name: debug-pod
description: |
  ...
metadata:
  user_invocable: "true"
---

All 13 skills in rh-developer/skills/ now pass compliance checks: no non-standard top-level frontmatter fields, name values match their directory names, and all description values are within the 1024-character limit.

---

💬 We'd love your input! Share your thoughts on Copilot coding agent in our 2 minute survey.

[Copilot]

Just as a heads up, I was blocked by some firewall rules while working on your feedback. Expand below for details.

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:

• agentskills.io
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node /home/REDACTED/work/_temp/ghcca-node/node/bin/node --enable-source-maps /home/REDACTED/work/_temp/copilot-developer-action-main/dist/index.js (dns block)
• archive.org
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node /home/REDACTED/work/_temp/ghcca-node/node/bin/node --enable-source-maps /home/REDACTED/work/_temp/copilot-developer-action-main/dist/index.js (dns block)
• webcache.googleusercontent.com
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node /home/REDACTED/work/_temp/ghcca-node/node/bin/node --enable-source-maps /home/REDACTED/work/_temp/copilot-developer-action-main/dist/index.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)