Beyond Mathlib

The Lean research ecosystem, in one directory.

Browse 636 source-backed Lean ecosystem records from curated repositories and a pinned Reservoir snapshot. Exact Therefore declaration coverage is labelled separately from package and repository discovery.

Reservoir index b6ac225af74c backs 600 directory records. Provider metadata is discovery evidence, not proof verification or authorship.

433 of 636 projects

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Package metadataLean library

LeanTeX_Mathlib

LeanTeX pretty printers for mathlib

Declarations not yet indexedLean 4.18.0-rc1

Pinned Reservoir package record · checked 2026-07-25

Math
Package metadataLean library

protobuf

protobuf implementation for Lean 4

Declarations not yet indexedLean 4.27.0

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

lean-semver

Semantic Versioning in Lean4

Declarations not yet indexedLean 4.30.0

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

PolyFun

Lean 4 library for polynomial functors, interaction trees, and frameworks for modeling interactive and effectful protocols

Declarations not yet indexedLean 4.32.0

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

lean2sexp

Convert Lean .olean files to s-expressions

Declarations not yet indexedLean nightly

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

juvix-lean

Juvix Lean library for compiler run verification

Declarations not yet indexedLean 4.19.0-rc2

Pinned Reservoir package record · checked 2026-07-25

Math
Package metadataLean library

Blake3

Lean4 bindings to Blake3

Declarations not yet indexedLean 4.31.0

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

Leanduction

Generate good induction principles on nested inductive types

Declarations not yet indexedLean 4.28.0

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

tamago

Common EVM smart contracts similar to solady/solmate, formally verified using Tama + Verity

Declarations not yet indexedLean 4.22.0

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

filter-game

Lean 4 version of the filter game.

Declarations not yet indexedLean 4.28.0-rc1

Pinned Reservoir package record · checked 2026-07-25

Math
Package metadataLean library

FormalizeWithTest

Autoformalization of coding problems, verified with test cases

Declarations not yet indexedLean 4.13.0

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

QuantumLogicalFramework

quantum genesis constructive possibilist quantum logical synthesis

Declarations not yet indexedLean 4.30.0-rc2

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

SuperTensor

Verified tensor graph optimization in Lean 4: constructive soundness proofs + equality saturation + verified extraction via e-graph↔circuit bijection + multi-target code generation.

Declarations not yet indexedLean 4.26.0

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

redisLean

Lean bindings for redis/hiredis

Declarations not yet indexedLean 4.31.0

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

lean_snakebird

An implementation of Snakebird in Lean.

Declarations not yet indexedLean 4.8.0-rc1

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

BET

Project for "Machine-Checked Mathematics" at the Lorentz Center

Declarations not yet indexedLean 4.33.0-rc1

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

detective

A Lean4 library to formalize and proof-check murder mysteries like Murdle, KnivesOut and Drishyam

Declarations not yet indexedLean 4.29.1

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

LeanSerde

Type-safe serialization for Lean

Declarations not yet indexedLean 4.25.0

Pinned Reservoir package record · checked 2026-07-25

Lean package