[docs] Update documentation for features from December 8-9, 2025

[github-actions]

Documentation Updates - December 8-9, 2025

This PR updates the documentation based on user-facing features merged in the last 24 hours.

Features Documented

1. Workflow Labels Field (from #5912)

• Added: labels field documentation to frontmatter.md
• Added: --label flag documentation to cli.md status command
• Purpose: Enables workflow categorization and filtering by labels

Usage Example:

---
name: CI Doctor
labels: ["automation", "ci", "diagnostics"]
on: pull_request
---

Filter workflows by label:

gh aw status --label automation

2. Minimize Comment Safe Output (from #5911)

• Added: minimize-comment to safe outputs table in safe-outputs.md
• Added: Detailed section with configuration, requirements, and examples
• Purpose: Allows AI agents to hide/minimize spam or inappropriate comments

Key Details:

• Requires GraphQL node IDs (strings like IC_kwDOABCD123456)
• Comments are classified as SPAM when minimized
• Useful for content moderation workflows
• Supports cross-repository operations

Configuration Example:

safe-outputs:
  minimize-comment:
    max: 5
    target-repo: "owner/repo"

Changes Made

• ✅ Updated docs/src/content/docs/reference/frontmatter.md with labels field documentation
• ✅ Updated docs/src/content/docs/setup/cli.md with --label flag for status command
• ✅ Updated docs/src/content/docs/reference/safe-outputs.md with minimize-comment safe output

Merged PRs Referenced

• Add labels field for workflow categorization and filtering #5912 - Add labels field for workflow categorization and filtering (merged Dec 9, 2025)
• Add minimize-comment safe output type for GraphQL-based comment moderation #5911 - Add minimize-comment safe output type for GraphQL-based comment moderation (merged Dec 8, 2025)

Verification

All documentation follows the Diátaxis framework and existing style guidelines:

• Used proper markdown headings (not bold text)
• Included code examples with appropriate language tags (yaml wrap, json)
• Maintained neutral, technical tone
• Cross-referenced related documentation sections

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