Cursor: Quarantine a Legacy Module Behind a Clean Interface
Wrap a messy legacy module behind a typed interface so new code stays clean while you defer the rewrite.
The Prompt
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Cursor: Migrate a Legacy Module With a Behavior Contract
Forces Cursor Composer to lock down current behavior before rewriting, so migrations don't silently break things.
Cursor Composer: Harden Every Input Boundary in a Module
Audits every external input entry point in a module and generates validation, normalization, and rejection code.
Cursor Composer: Migrate a Feature Behind a Kill Switch
Composer prompt that performs a risky migration with a feature flag wrapper and instant rollback path baked in.
Cursor Composer: Generate a Test Harness for Untested Code
Builds a meaningful test suite around legacy code by inferring its real behavior contract before touching it.