Expands the inline comment to serve as a reference for when to use the COALESCE(NULLIF(?, zero), column) defensive idiom in JSONL imports. Pattern protects clone-local state (pinned, gate fields) from being overwritten when importing JSONL where omitempty causes zero values to represent "field absent" rather than "field is zero". 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>