[docs] Add safe-outputs.messages customization documentation

[github-actions]

Documentation Updates - 2025-11-27

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

Summary

Added documentation for the safe-outputs.messages customization feature that allows users to customize notification messages and footers for safe output operations. This feature was introduced in PR #4903 and enhanced in PRs #4904 and #4906.

Features Documented

• Custom Messages (messages:) - Added comprehensive documentation for customizing notification messages including:
  • Available message templates (footer, run-started, run-success, run-failure, etc.)
  • Placeholder variables ({workflow_name}, {run_url}, {event_type}, etc.)
  • Import and override behavior for shared workflows
  • Practical example showing all message types

Changes Made

• Updated docs/src/content/docs/reference/safe-outputs.md to add a new "Custom Messages" section
  • Documented all available message templates
  • Listed all placeholder variables with descriptions
  • Included example configuration showing common use cases
  • Noted that custom messages can be imported and overridden

Merged PRs Referenced

• Fix custom safe output messages not passed to activation and conclusion jobs #4903 - Fix custom safe output messages not passed to activation and conclusion jobs
• Add merge support for safe-outputs.messages from shared workflows #4904 - Add merge support for safe-outputs.messages from shared workflows
• Add unique message styles to smoke test workflows #4906 - Add unique message styles to smoke test workflows

Other Changes Reviewed

The following merged PRs from the last 24 hours were reviewed but did not require documentation updates:

• Fix trailing whitespace in mcp inspect command examples #4911 - Fix trailing whitespace in mcp inspect command examples (cosmetic fix)
• Add ast_grep job to go-pattern-detector with conditional agent execution #4907 - Add ast_grep job to go-pattern-detector (internal workflow pattern)
• Add reusable formatToolCallAsDetails helper for consistent HTML details rendering in log parsers #4897 - Add reusable formatToolCallAsDetails helper (internal rendering)
• Add debugging logs to playwright MCP in smoke-copilot workflow #4902 - Add debugging logs to playwright MCP (debugging enhancement)
• Update smoke agentic workflows to create extremely short answers #4898 - Update smoke agentic workflows (internal testing)
• docs: clarify AWF does not support wildcard domain syntax #4892 - docs: clarify AWF does not support wildcard domain syntax (already merged docs)
• Update AWF to v0.5.0 and migrate to new container/log naming conventions #4877 - Update AWF to v0.5.0 (naming conventions already reflected in docs)
• feat(sandbox): add a new sandbox for copilot and supports sandbox-runtime #4295 - feat(sandbox): add Sandbox Runtime support (already documented in frontmatter-full.md and labs.mdx)

Notes

All user-facing features from the last 24 hours have been documented. The safe-outputs.messages feature was the primary user-facing enhancement that needed additional documentation in the reference pages. Other features like Sandbox Runtime (SRT) are already documented in the frontmatter reference and labs pages.

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