v1.2.8

What changed

• Added native C++ support for all 12 MPE2 v1.1.1 scenarios, including discrete and continuous actions and RGB rendering. #439
• Reworked oracle checks across Jumanji, MyoSuite, MJLab, and MuJoCo Playground to compare independently computed transitions. Fixed environment state, reward, and rendering discrepancies found by those checks. #440
• Fixed Jumanji CVRP defaults and penalties, shared Sudoku and Sokoban datasets across vector slots, and strengthened alignment and randomization checks for PGX and Highway. #441

Craftax seed compatibility

Craftax now uses EnvPool's native C++ random number generator. With the same build, platform, configuration, seed, and actions, runs still replay deterministically. Seeds from earlier releases generate different worlds and trajectories in 1.2.8. #441

Install

pip install -U envpool==1.2.8

Wheels are available for CPython 3.12, 3.13, and 3.14 on Linux x86-64 and ARM64, macOS ARM64, and Windows x64. See the platform requirements.

Verification

The wheels were built and tested from main commit 97333276e156a97de93c79c40923aa23c4fdb2ce. Wheel builds and installed-package checks · Full tests and coverage · Lint · Clang-tidy

See the attached SHA256SUMS and validation.json for wheel hashes and build provenance.

Full changelog