Zero-Downtime Migration Sandbox by KhyFee.
Spin up a Dockerized Postgres shadow clone, run migrations, emit a structural schema diff, and auto-generate rollback SQL — then verify the rollback restores the prior schema. No AI.
Developed privately before this public release — commit history reflects open packaging, not a simulated multi-month timeline.
npm install
# Docker required for demo
npm run demo
# inspect .safemigrate/ROLLBACK.sql, diff.md, report.md- Dropped columns/tables, risky type changes, NOT NULL without default
- Expand/contract statement lint + structural catalog diff
- Policy fail-on for CI (
fail-on: destructive)
Honest limit: schema structure (+ tiny seed checks). Lock duration under production data volume is not simulated.
npx @khyfee/safemigrate doctor
npx @khyfee/safemigrate demo [--strict] [--step]
npx @khyfee/safemigrate migrate --dir ./migrations --baseline ./schema.sql
MIT (c) KhyFee