vercel-labs/next-maintainer-skills.

nextjs-bisect-regression

Locate the introduction or fix boundary for a validated Next.js regression using releases or commits and an executable reproduction. Use after reported-version-versus-canary verification when a vercel/next.js maintainer needs the last unchanged and first changed version or commit.

nextjs-create-regression-test

Turn a validated Next.js reproduction and canary verification into the smallest appropriate regression test in vercel/next.js. Use when a confirmed issue needs a focused test that proves the reported behavior and fits the existing Next.js test suite.

nextjs-fix-issue

Implement and validate the smallest correct fix for a confirmed issue in vercel/next.js after reproduction, canary verification, and regression-test work. Use when a focused failing Next.js regression test exists and the product code must be corrected without weakening that test.

nextjs-reproduce-issue

Reproduce and validate a reported Next.js issue using real code and runtime evidence. Use when investigating whether a vercel/next.js bug report is reproducible, repairing an incomplete reproduction, or creating the smallest standalone reproduction when none is provided.

nextjs-verify-canary

Compare a validated Next.js reproduction on its reported version and the latest published next@canary under equivalent conditions. Use when determining whether a confirmed vercel/next.js issue still reproduces on canary or appears fixed there.