- Add comprehensive godoc to CreateIssues with usage examples - Add batch operations section to EXTENDING.md with performance comparison - Add performance feature to README.md - Include when to use CreateIssue vs CreateIssues guidance - Document counter sync requirement after explicit IDs Amp-Thread-ID: https://ampcode.com/threads/T-59fc78c3-a7f2-4c33-b074-2fa840c97c87 Co-authored-by: Amp <amp@ampcode.com>