Lean4-ProofWidgets

Structured dataset from ProofWidgets4 — Interactive proof widgets.

Source

• Repository: https://github.com/leanprover-community/ProofWidgets4
• Commit: 85bb7e7637e84a7d9803be7d954579fdae42c64b
• Files: 41
• License: apache-2.0

Schema

Column	Type	Description
statement	string	Declaration signature/claim with the leading keyword removed (verbatim slice); the full declaration minus its proof
proof	string	Verbatim proof/body, empty if the declaration has none
type	string	Declaration keyword
symbolic_name	string	Declaration identifier
library	string	Sub-library
filename	string	Repository-relative source path
imports	list[string]	File-level Require/Import modules
deps	list[string]	Intra-corpus identifiers referenced
docstring	string	Preceding documentation comment, empty if absent
source_url	string	Upstream repository
commit	string	Upstream commit extracted

Statistics

• Entries: 306
• With proof: 244 (79.7%)
• With docstring: 92 (30.1%)
• Libraries: 9

By type

Type	Count
def	206
structure	59
inductive	17
abbrev	8
elab	5
opaque	4
class	3
axiom	2
macro	1
theorem	1

Example

mkCancellable [RpcEncodable β] (handler : α → RequestM (RequestTask β)) :
    α → RequestM (RequestTask RequestId)
fun a => do
  RequestM.asTask do
    let t ← handler a
    let t' := t.mapCheap (·.map rpcEncode)
    runningRequests.modifyGet fun (id, m) =>
      (id, (id+1, m.insert id ⟨t'.task, t.cancel⟩))

• type: def | symbolic_name: ProofWidgets.mkCancellable | ProofWidgets/Cancellable.lean

Use

Each declaration is split into a statement (signature/claim) and a proof (body) that are disjoint and together form the complete declaration, for proof modeling, autoformalization, retrieval, and dependency analysis via deps.

Citation

@misc{lean4_proofwidgets_dataset,
  title  = {Lean4-ProofWidgets},
  author = {Norton, Charles},
  year   = {2026},
  note   = {Extracted from https://github.com/leanprover-community/ProofWidgets4, commit 85bb7e7637e8},
  url    = {https://huggingface.co/datasets/phanerozoic/Lean4-ProofWidgets}
}