lean-bisectBisect Lean toolchain versions to find where behavior changes. Use when trying to identify which Lean 4 commit caused a regression or behavior change.
lean-mweCreate minimal working examples (MWEs) from Lean errors for bug reports. Use when minimizing a Lean error, creating an MWE, or preparing a bug report for lean4 or mathlib4.
lean-prPR conventions for the leanprover/lean4 repository. Use when creating pull requests, writing commit messages, or following project conventions for Lean contributions.
lean-proofUse when asked to prove something in Lean. Covers one-step-at-a-time proving, error priority, working on the hardest case first, proof cleanup, and handling dependent type rewriting issues.
lean4-setupSet up a lean4 repository clone with proper elan toolchains.
mathlib-prPR conventions for leanprover-community/mathlib4. Use when creating pull requests, writing commit messages, or managing labels for Mathlib contributions.
mathlib-reviewReview guidelines for Mathlib PRs. Use when reviewing pull requests, checking code quality, or assessing whether a PR is ready to merge.
nightly-testingUnderstanding the Lean/Mathlib nightly testing infrastructure. Use when working on toolchain bumps, adaptation PRs, or investigating nightly CI failures.