leanprover/skills

lean-proof

Use 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.

lean-bisect

Bisect Lean toolchain versions to find where behavior changes. Use when trying to identify which Lean 4 commit caused a regression or behavior change.

lean-mwe

Create 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-pr

PR conventions for the leanprover/lean4 repository. Use when creating pull requests, writing commit messages, or following project conventions for Lean contributions.

lean4-setup

Set up a lean4 repository clone with proper elan toolchains.

mathlib-build

Building Mathlib

mathlib-pr

PR conventions for leanprover-community/mathlib4. Use when creating pull requests, writing commit messages, or managing labels for Mathlib contributions.

mathlib-review

Review guidelines for Mathlib PRs. Use when reviewing pull requests, checking code quality, or assessing whether a PR is ready to merge.

nightly-testing

Understanding the Lean/Mathlib nightly testing infrastructure. Use when working on toolchain bumps, adaptation PRs, or investigating nightly CI failures.