[instructions] Sync github-agentic-workflows.md with release v0.68.3

[github-actions]

Instructions Update - Synchronized with v0.68.3

This PR updates the github-agentic-workflows.md file based on documentation changes since the last release (v0.68.1 was the previous sync).

Changes Made

• Import object form: Document the new checkout: and env: fields introduced in v0.68.3 for import entries using the path:/uses: + with: syntax.
  • env: — pass environment variables into the imported workflow context
  • checkout: — specify which ref to check out when processing a specific import entry

Documentation Commits Reviewed

Only one docs-adjacent commit landed since v0.68.3 (5080878), which modifies a workflow file (daily-architecture-diagram.md), not the instructions file.

Safe-Outputs Code Audit

All operations parsed in pkg/workflow/safe_outputs_config.go are already documented in the instructions file. No gaps found.

Documentation Commits (v0.68.3 release) Reviewed

• feat: support checkout field in importable shared workflows (feat: support checkout field in importable shared workflows #26292) → added
• feat: support env field in shared imports (feat: support env field in shared imports #26113) → added
• fix: add reply_to_id to add_comment MCP tool schema (fix: add reply_to_id to add_comment MCP tool schema #26288) → already documented
• fix: rename --safe-update to --approve (fix: rename --safe-update to --approve and improve safe update UX #26160) → already documented
• Skip Docker image validation, add --validate-images flag (Skip Docker image validation when Docker is unavailable, add --validate-images flag #26074) → already documented
• fix: expose safe-outputs.actions custom action tools (fix: expose safe-outputs.actions custom action tools to agent MCP toolset #26291) → already documented

Validation

• Followed prompting best practices (imperative mood, minimal examples)
• Maintained technical tone and brevity
• Updated only necessary sections
• Verified accuracy against current codebase (safe_outputs_config.go)
• Removed outdated or redundant content (none found)

Generated by Instructions Janitor · ● 374.2K · ◷

• expires on Apr 27, 2026, 10:57 AM UTC