zero-downtime-database-migration
curiositech/port-daddyUse when changing schema on a live production database without dropping traffic, doing expand/contract migrations, backfilling new columns on million-plus-row…
Scores out of 100 · grade B+
2026-08-22Works
40% of the score100/100
- Loads cleanly: valid frontmatter, required fields present, no dangling references.
Maintained
25% of the score94/100
- no commits in the last 12 weeks
- no license file
Adopted
20% of the score7/100
- 2 stars on the source repo.
Documented
15% of the score91/100
- 2,756 words with worked examples.
- Ships 4 bundled files.
Install
npx skills add curiositech/port-daddy/zero-downtime-database-migrationWhat the check found
| Finding | What it means |
|---|---|
| No license | The repository ships no license file, so the reuse terms are unclear. |
What it says it does
Use when changing schema on a live production database without dropping traffic, doing expand/contract migrations, backfilling new columns on million-plus-row tables, dual-writing across schemas, renaming a hot column, splitting a table, or adding a foreign key to a big table. Triggers: ALTER TABLE locks the world, "must be removed in a separate deploy", expand-contract-cleanup phases, NOT NULL on populated column, foreign-key add on big table, dropping a column still read by old replicas, lock_timeout choice, gh-ost vs pt-online-schema-change. NOT for greenfield schema design, ORM-managed migration mechanics (Prisma/Drizzle), D1/Supabase CLI quirks, or NoSQL document migrations.
Also in curiositech/port-daddy
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