Use when developing Lean 4 proofs, facing type class synthesis errors, managing sorries/axioms, or searching mathlib - provides build-first workflow, instance management patterns (haveI/letI), and domain-specific tactics
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references/axiom-elimination.mdreferences/calc-patterns.mdreferences/compilation-errors.mdreferences/compiler-guided-repair.mdreferences/domain-patterns.mdreferences/instance-pollution.mdreferences/lean-lsp-server.mdreferences/lean-lsp-tools-api.mdreferences/lean-phrasebook.mdreferences/mathlib-guide.mdreferences/mathlib-style.mdreferences/measure-theory.mdreferences/performance-optimization.mdreferences/proof-golfing.mdreferences/proof-refactoring.mdreferences/sorry-filling.mdreferences/subagent-workflows.mdreferences/tactics-reference.md