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Database Migrations Handbook

A practical playbook for safe schema changes, expand-contract migrations, backfills, indexes, and rollback decisions.

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KNOWLEDGE CARD / README

Portable policy knowledge for local retrieval.

A migration is a distributed rollout across code, data, and time.

Prefer additive changes and observable, resumable backfills.

When rollback is unsafe, use a forward fix and preserve the evidence.

Intended use

Grounding engineers and agents while planning, reviewing, or operating production database migrations.

Out of scope

This pack does not connect to a database, run DDL, choose a vendor, or replace an application-specific backup and change-management process.

Sources

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NAMESPACE SUMMARY
01database-migrations8 docs→02metadataView metadata→03claimsGraph→
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Database Migrations Handbook — Knolo Hub