Changelog

This page documents the notable changes to LeanInteract.

v0.10.5 (December 15, 2025)

Add support for Lean v4.26.0 and v4.27.0-rc1

Full Changelog: https://github.com/augustepoiroux/LeanInteract/compare/v0.10.4...v0.10.5

v0.10.4 (December 01, 2025)

• Fix auto_build parameter for git and temporary projects
• Make REPL build skippable
• Print check_lake output for debugging (when verbose=True)

Full Changelog: https://github.com/augustepoiroux/LeanInteract/compare/v0.10.3...v0.10.4

v0.10.3 (November 25, 2025)

Add support for Lean v4.24.1 and v4.25.2

Full Changelog: https://github.com/augustepoiroux/LeanInteract/compare/v0.10.2...v0.10.3

v0.10.2 (November 24, 2025)

Add support for Lean v4.26.0-rc2

Full Changelog: https://github.com/augustepoiroux/LeanInteract/compare/v0.10.1...v0.10.2

v0.10.1 (November 24, 2025)

Add support for Lean v4.26.0-rc1

Full Changelog: https://github.com/augustepoiroux/LeanInteract/compare/v0.10.0...v0.10.1

v0.10.0 (November 18, 2025)

• Add ReplaySessionCache to replay commands, offering a more reliable alternative to PickleSessionCache. ReplaySessionCache is now the default in AutoLeanServer.
• Make session caching thread-safe
• Add support for Lean v4.25.1
• Add multi-threading examples

Full Changelog: https://github.com/augustepoiroux/LeanInteract/compare/v0.9.3...v0.10.0

v0.9.3 (November 17, 2025)

Add support for Lean v4.25.0

v0.9.2 (October 22, 2025)

Add support for Lean v4.25.0-rc1 and v4.25.0-rc2.

Full Changelog: https://github.com/augustepoiroux/LeanInteract/compare/v0.9.1...v0.9.2

v0.9.1 (October 14, 2025)

Add support for Lean v4.24.0

Full Changelog: https://github.com/augustepoiroux/LeanInteract/compare/v0.9.0...v0.9.1

v0.9.0 (October 13, 2025)

What's Changed

New features:

• Fine-grained data extraction for Lean declarations https://github.com/leanprover-community/repl/pull/119
• Incremental elaboration https://github.com/leanprover-community/repl/pull/110
  • also fixes #6
• Parallel elaboration (through set_option support)
• set_option support https://github.com/leanprover-community/repl/pull/119

A few fixes:

• https://github.com/leanprover-community/repl/pull/108
• https://github.com/leanprover-community/repl/pull/109

Add py.typed

• 32

Breaking changes:

• Support for Lean v4.7.0 is dropped

Full Changelog: https://github.com/augustepoiroux/LeanInteract/compare/v0.8.3...v0.9.0

v0.8.3 (September 15, 2025)

Add support for Lean v4.23.0 and v4.24.0-rc1

v0.8.2 (August 15, 2025)

Add support for Lean v4.23.0-rc1 and v4.23.0-rc2

Full Changelog: https://github.com/augustepoiroux/LeanInteract/compare/v0.8.1...v0.8.2

v0.8.1 (August 14, 2025)

Add support for Lean v4.22.0

Full Changelog: https://github.com/augustepoiroux/LeanInteract/compare/v0.8.0...v0.8.1

v0.8.0 (July 24, 2025)

What's Changed

• Separate Lean projects and LeanREPLConfig set up logic by @augustepoiroux in https://github.com/augustepoiroux/LeanInteract/pull/30
  • Project classes can now be used as independent units for managing Lean projects.
  • For new usage, check the projects page in the documentation (minimal breaking changes).
• Major update to the documentation (link)
  • Online documentation now shows documentation for previous package versions by @augustepoiroux in https://github.com/augustepoiroux/LeanInteract/pull/31
  • Improved doc interface and content
  • Improved docstrings in the Python package

Full Changelog: https://github.com/augustepoiroux/LeanInteract/compare/v0.7.0...v0.8.0

v0.7.0 (July 04, 2025)

What's Changed

• Check Lean version formatting by @sorgfresser in https://github.com/augustepoiroux/LeanInteract/pull/27
• Improve git-related operations by @augustepoiroux in https://github.com/augustepoiroux/LeanInteract/pull/28
  • GitProject has a force_pull argument to enforce pulling / reset if the project is already in the cache
  • Similarly, LeanREPLConfig has a force_pull_repl argument. Useful when working on a custom REPL living on an evolving git branch.
• Bump REPL to v1.0.12 by @augustepoiroux in https://github.com/augustepoiroux/LeanInteract/pull/29
  • FileCommand has now an env field https://github.com/leanprover-community/repl/pull/99
  • Various REPL fixes: https://github.com/leanprover-community/repl/pull/106, https://github.com/leanprover-community/repl/pull/98, https://github.com/leanprover-community/repl/pull/72
  • Syntax nodes now export a few more attributes https://github.com/leanprover-community/repl/pull/89
• New LeanServer.get_memory_usage method to monitor REPL memory usage.
• Add InfoTree pydantic models by @sorgfresser in https://github.com/augustepoiroux/LeanInteract/pull/3
  • Leverage the new exported attributes for syntax nodes https://github.com/leanprover-community/repl/pull/89

Full Changelog: https://github.com/augustepoiroux/LeanInteract/compare/v0.6.3...v0.7.0

v0.6.3 (July 01, 2025)

What's Changed

• Add support for Lean v4.22.0-rc1 and v4.22.0-rc2

Full Changelog: https://github.com/augustepoiroux/LeanInteract/compare/v0.6.2...v0.6.3

v0.6.2 (June 30, 2025)

What's Changed

• Add support for Lean v4.21.0

Full Changelog: https://github.com/augustepoiroux/LeanInteract/compare/v0.6.1...v0.6.2

v0.6.1 (June 24, 2025)

What's Changed

• Fix Lean version inference for LocalProject and GitProject by @augustepoiroux in https://github.com/augustepoiroux/LeanInteract/pull/26
• Fix ResourceWarning issues when killing the REPL
• Improve memory monitoring in AutoLeanServer

Full Changelog: https://github.com/augustepoiroux/LeanInteract/compare/v0.6.0...v0.6.1

v0.6.0 (June 05, 2025)

What's Changed

• Support for local / custom REPL + Lean versions up to v4.21.0-rc3 by @augustepoiroux in https://github.com/augustepoiroux/LeanInteract/pull/21
• Separate the session cache logic from AutoLeanServer by @sorgfresser in https://github.com/augustepoiroux/LeanInteract/pull/18
• Add documentation by @augustepoiroux in https://github.com/augustepoiroux/LeanInteract/pull/19
• Add support for modern Python Path by @augustepoiroux in https://github.com/augustepoiroux/LeanInteract/pull/20

Full Changelog: https://github.com/augustepoiroux/LeanInteract/compare/v0.5.3...v0.6.0

v0.5.3 (May 18, 2025)

What's Changed

• Add optional build boolean for LocalProject by @sorgfresser in https://github.com/augustepoiroux/LeanInteract/pull/16
• Slightly improve sorry detection in lean_code_is_valid by checking message instead of just sorries in REPL output.

Full Changelog: https://github.com/augustepoiroux/LeanInteract/compare/v0.5.2...v0.5.3

v0.5.2 (May 01, 2025)

Introduce compatibility with Lean v4.19.0

Full Changelog: https://github.com/augustepoiroux/LeanInteract/compare/v0.5.1...v0.5.2

v0.5.1 (April 30, 2025)

What's Changed

• Add fix for non-respected timeout by @augustepoiroux in https://github.com/augustepoiroux/LeanInteract/pull/13
• Query Lake cache for all Project types by @habemus-papadum in https://github.com/augustepoiroux/LeanInteract/pull/10
• Bump REPL version to v1.0.7 fixing "auxiliary declaration cannot be created when declaration name is not available" in tactic mode for Lean \<= v4.18.0 https://github.com/leanprover-community/repl/issues/44#issuecomment-2814069261

Full Changelog: https://github.com/augustepoiroux/LeanInteract/compare/v0.5.0...v0.5.1

v0.5.0 (April 21, 2025)

What's Changed

• Make LeanInteract cross-platform by @augustepoiroux in https://github.com/augustepoiroux/LeanInteract/pull/4
• Fix infotree parsing issue by @sorgfresser in https://github.com/augustepoiroux/LeanInteract/pull/1
• Implement async_run + make calls to the REPL thread-safe by @augustepoiroux in https://github.com/augustepoiroux/LeanInteract/pull/2

v0.4.1 (April 18, 2025)

Full Changelog: https://github.com/augustepoiroux/LeanInteract/compare/v0.4.0...v0.4.1

v0.4.0 (April 11, 2025)

Full Changelog: https://github.com/augustepoiroux/LeanInteract/compare/v0.3.3...v0.4.0

v0.3.3 (April 04, 2025)

Full Changelog: https://github.com/augustepoiroux/LeanInteract/compare/v0.3.2...v0.3.3

v0.3.2 (April 03, 2025)

Full Changelog: https://github.com/augustepoiroux/LeanInteract/compare/v0.3.1...v0.3.2

v0.3.1 (April 02, 2025)

Full Changelog: https://github.com/augustepoiroux/LeanInteract/compare/v0.3.0...v0.3.1

v0.3.0 (April 02, 2025)

Full Changelog: https://github.com/augustepoiroux/LeanInteract/compare/v0.2.0...v0.3.0

v0.2.0 (March 18, 2025)

Full Changelog: https://github.com/augustepoiroux/LeanInteract/commits/v0.2.0

Pre-release Development

For development history prior to the first release, please see the GitHub commit history.