core practice · coding problem
Diff two prompt versions
v1 and v2 prompts differ by one instruction. Name what you must re-run before shipping v2.
The mechanism
Treat prompts like code — every production change gets a version, a saved diff, and a re-run of your evals. Without that, when quality drops you have no commit to point at.
Expected evidence
Frozen eval set on both versions; compare pass rate delta.
Try this drill in the practice workspace →
Hints when you need them
- Prompts are code — version them.
- Never ship without eval diff.