lean4

cameronfreer/lean4-skills

SkillLoads cleanly

Use when editing .lean files, debugging Lean 4 builds (type mismatch, sorry, failed to synthesize instance, axiom warnings, lake build errors), searching…

Scores
out of 100 · grade A

2026-08-21

Works

40% of the score

100/100

Loads cleanly: valid frontmatter, required fields present, no dangling references.

Maintained

25% of the score

100/100

no commits in the last 12 weeks

Adopted

20% of the score

36/100

392 stars on the source repo.

Documented

15% of the score

90/100

3,555 words with worked examples.
Ships 45 bundled files.

Loads cleanly. Every structural check Claude Code needs to register this passed. Last commit today.

Install

npx skills add cameronfreer/lean4-skills/lean4

What it says it does

Use when editing .lean files, debugging Lean 4 builds (type mismatch, sorry, failed to synthesize instance, axiom warnings, lake build errors), searching mathlib for lemmas, formalizing mathematics in Lean, finding a counterexample to, refuting, or disproving a Lean statement, or learning Lean 4 concepts. Also trigger when the user asks for help with Lean 4, mathlib, or lakefile. Do NOT trigger for Coq/Rocq, Agda, Isabelle, HOL4, Mizar, Idris, Megalodon, or other non-Lean theorem provers.

Every number above came out of reading the file and its repository. Nothing is a judgement call, nothing is a model’s opinion, and nothing can be paid for. The full method is published. Source last committed 2026-08-21.

Also in cameronfreer/lean4-skills

Other artifacts published from the same repository.
Artifact	What the check found	Type	Reach	Last commit
proof-golfercameronfreer/lean4-skills	clean	Subagent	392 stars	today
sorry-filler-deepcameronfreer/lean4-skills	clean	Subagent	392 stars	today
axiom-eliminatorcameronfreer/lean4-skills	clean	Subagent	392 stars	today
proof-repaircameronfreer/lean4-skills	clean	Subagent	392 stars	today
lean4-skillscameronfreer/lean4-skills	clean	Marketplace	392 stars	today
lean4-contributecameronfreer/lean4-skills	clean	Plugin	392 stars	today

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