Lesson 924 of 2116
Database Migrations Are Not Suggestions
A schema edit needs a migration, a rollback story, and data safety. Never let an agent freestyle production tables.
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- 1Database Migrations Are Not Suggestions
- 2migration
- 3schema
- 4rollback
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Section 1
Database Migrations Are Not Suggestions
A schema edit needs a migration, a rollback story, and data safety. Never let an agent freestyle production tables.
- 1Name the job before naming the tool.
- 2Write the smallest useful scope the agent can finish.
- 3Run the result as a user, not as a fan of the tool.
- 4Inspect the diff, data access, and failure path before sharing.
Use this as the working prompt or checklist for the lesson.
Add a nullable column profiles.timezone with a migration. Do not rewrite existing rows. Add app fallback to 'America/New_York' when timezone is null.- What should the user be able to do when this is finished?
- What data should the app or agent never expose?
- What test proves the change works?
- What rollback path exists if the output is wrong?
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