[docs] Update documentation for shorthand label trigger syntax

[github-actions]

Documentation Updates - 2025-12-21

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

Features Documented

• Shorthand label trigger syntax - Documents the new convenient syntax for label-based triggers added in PRs Add short trigger syntax for labeled events with explicit item types #7153, Add comprehensive trigger shorthand syntax parser with fuzz testing and IDE-integrated error messages #7160, and Support comma-separated label names in trigger syntax parser #7169
  • Basic format: on: issue labeled bug
  • Space-separated labels: on: issue labeled bug enhancement priority-high
  • Comma-separated labels: on: issue labeled bug, enhancement, priority-high
  • Support for issues, pull requests, and discussions

Changes Made

• Updated docs/src/content/docs/reference/triggers.md to document shorthand syntax for label triggers
• Added new "Shorthand Syntax for Label Triggers" subsection under "Label Filtering (names:)"
• Included examples for all supported formats (basic, space-separated, comma-separated)
• Documented behavior differences for discussion entity types
• Noted that shorthand syntax automatically includes workflow_dispatch trigger

Merged PRs Referenced

• Support comma-separated label names in trigger syntax parser #7169 - Support comma-separated label names in trigger syntax parser
• Add comprehensive trigger shorthand syntax parser with fuzz testing and IDE-integrated error messages #7160 - Add comprehensive trigger shorthand syntax parser with fuzz testing and IDE-integrated error messages
• Add short trigger syntax for labeled events with explicit item types #7153 - Add short trigger syntax for labeled events with explicit item types

Notes

The following features were already documented and did not require updates:

• on: /command shorthand for slash commands (PR Add slash command shorthand syntax: on: /command #7146) - already documented at lines 287-292
• on: daily shorthand for schedules (PR Simplify daily schedule syntax to on: daily #7138) - already documented at lines 92-93

Other merged PRs from the last 24 hours were internal improvements, refactorings, or fixes that do not affect user-facing documentation:

• Refactor: Extract normalizeScheduleString to eliminate duplicate preprocessing logic #7171 - Internal refactoring (schedule preprocessing)
• Fix: Add checkout and Git config for create-pull-request and push-to-pull-request-branch safe outputs #7167 - Internal fix (safe outputs Git configuration)
• Fix linting errors and update test expectations for action pins #7166 - Test and linting fixes
• Update CLI tools: Claude Code 2.0.75, Copilot 0.0.372, Codex 0.77.0, Playwright MCP 0.0.53 #7165 - CLI tool version updates
• Exclude copilot and GitHub Actions bots from ai-moderator review #7163, Add --network host to Playwright Docker containers for localhost access #7158, Comment out lock-for-agent annotation in compiled workflow files #7156, Add file size monitoring and documentation guidelines #7155, Enhance Dev Hawk with deep PR analysis and automatic agent task creation #7151, Add documentation headers to helper files #7149, docs: update campaign documentation for orchestrator consolidation #7148, Enable agentic-workflows tool in dev-hawk workflow #7147 - Various internal improvements

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