GearBox/.planning/phases/29-image-presentation/29-04-SUMMARY.md

phase, plan, subsystem, tags, key-files, metrics

phase	plan	subsystem	tags	key-files	metrics
29	04	backend	migration backfill sharp	created modified scripts/backfill-dominant-colors.ts package.json	tasks commits files-changed 2 1 2

Plan 29-04 Summary: Backfill Migration Script

What was built

• Created scripts/backfill-dominant-colors.ts backfill script
• Processes items, globalItems (source URLs + image URLs), and threadCandidates
• Extracts dominant color via Sharp 1x1 resize
• Idempotent: skips records with existing dominantColor
• Batch processing with 10 concurrent requests
• Progress logging per table
• Added backfill:colors npm script

Commits

Task	Commit	Description
1-2	6509b33	Create backfill script and npm shortcut

Deviations

None.

Self-Check: PASSED

• Script exists: YES
• Processes all 3 tables: YES
• Idempotent (isNull check): YES
• Batch size 10: YES
• Progress logging: YES
• npm script exists: YES
• Lint passes: YES