Version 2.7.8

This maintenance release focuses on JAX compatibility cleanup, packaging improvements for brainevent, and documentation streamlining. It also removes duplicated internal JAXPR source-conversion code by relying on the shared brainstate implementation.

Improvements

JAX Compatibility and Internal Refactoring

• Updated: Replaced version-specific JAX imports with brainstate._compatible_import across math compatibility, backend environment utilities, surrogate operators, and vmap-removal helpers
  • Centralizes compatibility handling for Primitive and backend imports across newer JAX releases
• Updated: brainpy.integrators now imports jaxpr_to_python_code from brainstate.transform
  • Removed the duplicated local brainpy.integrators._jaxpr_to_source_code implementation
  • Keeps integrator math-expression generation aligned with the shared brainstate implementation
• Updated: bm.trapz now consistently maps to jax.scipy.integrate.trapezoid

Packaging

• Updated: Optional install extras now include matching brainevent extras
  • brainpy[cpu] installs brainevent[cpu]
  • brainpy[cuda12] installs brainevent[cuda12]
  • brainpy[cuda13] installs brainevent[cuda13]
  • brainpy[tpu] installs brainevent[tpu]
• Impact: Simplifies accelerator-specific installation and keeps event-backend dependencies aligned with the selected JAX platform

Documentation

• Added: Direct link to the external brainpy.state API reference in the docs API index (#822)
• Removed: Legacy brainpy and brainpylib historical changelog pages from the main documentation navigation
• Removed: Advanced operator-customization tutorial notebooks for CuPy, Numba, and Taichi from the documentation tree
• Updated: Refreshed quickstart simulation notebook content and documentation structure around brainpy.state

Testing and CI/CD

• Improved: Disabled JAX traceback filtering in brainpy.dnn linear tests to make failures easier to diagnose
• Updated: Raised the Sphinx upper bound for documentation builds from <8.2.0 to <9.1.0 (#820)
• Updated: Bumped styfle/cancel-workflow-action from 0.13.0 to 0.13.1 in CI (#819)

What's Changed

• chore(ci)(deps): bump styfle/cancel-workflow-action from 0.13.0 to 0.13.1 in the github-actions group by @dependabot[bot] in #819
• chore(deps)(deps): update sphinx requirement from <8.2.0,>=5 to >=5,<9.1.0 by @dependabot[bot] in #820
• chore: update documentation and dependencies for brainpy.state module by @chaoming0625 in #822
• chore: JAX>=0.10.0 compatibility by @chaoming0625 in #824

Full Changelog: V2.7.7...V2.7.8