What's Changed

• Add NNX surgery guide by @IvyZX in #4005
• Port gemma/transformer to NNX by @copybara-service in #4019
• upgrade python to 3.10 use pyupgrade by @cgarciae in #4038
• [nnx] add Using Filters guide by @cgarciae in #4028
• v0.8.6 by @cgarciae in #4040
• allow imagenet training profiling to be disabled in config by @copybara-service in #4043
• [nnx] LoRAParam inherits from Param by @cgarciae in #3988
• [linen] allows multiple compact methods by @cgarciae in #3808
• Added support of NANOO fp8. by @wenchenvincent in #3993
• Add functool.wraps() annotation to flax.nn.jit. by @copybara-service in #4051
• Fix typo in nnx_basics doc by @rajasekharporeddy in #4047
• [nnx] fix Variable overloads and add shape/dtype properties by @cgarciae in #4049
• Stop writing msgpack file for new checkpoints and update empty nodes handling so that it no longer depends on this file. by @copybara-service in #4039
• [nnx] stabilize unsafe_pytree by @cgarciae in #4030
• Stop writing msgpack file for new checkpoints and update empty nodes handling so that it no longer depends on this file. by @copybara-service in #4055
• [NVIDIA] Rename fp8 custom dtype to fp32_max_grad by @kaixih in #3984
• [nnx] fix mnist_tutorial colab link by @cgarciae in #4063
• [nnx] fix Accuracy on eager mode by @cgarciae in #4065
• Update orbax_upgrade_guide.rst for async checkpointing usage examples by @kaushaladiti-2802 in #4036
• Re-enable some tests after Python 3.9 is dropped by @IvyZX in #4067
• Rename nnx.compat to nnx.bridge by @IvyZX in #4066
• [nnx] improve mnist tutorial by @cgarciae in #4070
• Modify Flax checkpointing in preparation for cl/650338576. by @copybara-service in #4072
• Remove some outdated backward-compatibility code. by @copybara-service in #4068
• [NVIDIA] Add a user guide for fp8 by @kaixih in #4076
• [nnx] add extract APIs by @cgarciae in #4078
• [example]: remove lm1b useless parallism rules by @knightXun in #4077
• [nnx] improve filters guide by @cgarciae in #4059
• [nnx] add call by @cgarciae in #4004
• Ignore Orbax warning in deprecated flax.training.checkpoints.py to unbreak head doctest by @IvyZX in #4092
• fix mypy failures due tu numpy update by @cgarciae in #4098
• [linen] generalize transform caching by @copybara-service in #4057
• [linen] fold rngs on jit to improve caching by @copybara-service in #4064
• Add shape-based lazy init to LinenToNNX (prev LinenWrapper) by @IvyZX in #4081
• [nnx] add reseed by @cgarciae in #4099
• [nnx] add split/merge_inputs by @cgarciae in #4084
• Perform shape checks for self.param AFTER unboxing by @danielwatson6 in #4079
• fix restore_checkpoint example in docstring by @copybara-service in #4101
• [numpy] Fix users of NumPy APIs that are removed in NumPy 2.0. by @copybara-service in #4104
• set profile_duration_ms = None as in periodic_actions there's default value for both num_profile_steps and profile_duration_ms, and the profile stopping condition is when both num_profile_steps and profile_duration_ms are satisfied, so setting profile_duration_ms=None so that the passed num_profile_steps value gets used by @copybara-service in #4096
• [linen] add share_scope by @cgarciae in #4102
• Allow metadata pass-through in flax.struct.field by @cool-RR in #4056
• avoid mixing einsum_dot_general and einsum argument by specifying them explicitly in the caller. by @copybara-service in #4115
• Add logging to track deprecated codepaths. by @copybara-service in #4121
• [pmap no rank reduce cleanup]: When flipping the by @copybara-service in #4125
• Add NNXToLinen wrapper to nnx.bridge by @IvyZX in #4126
• Switch NNX to use Treescope instead of Penzai. by @copybara-service in #4132
• Add GroupNorm to NNX normalization layers by @treigerm in #4095
• [nnx] fix initializing propagation by @cgarciae in #4134
• add JAX-style NNX Transforms FLIP by @cgarciae in #4108
• Fix _ParentType annotation by @dcharatan in #4120
• add uv.lock file by @copybara-service in #4139
• use uv package manager by @cgarciae in #4136
• More testing and misc fixes on wrappers by @IvyZX in #4137
• Fix link to orbax documentation by @cool-RR in #4123
• [nnx] experimental transforms by @cgarciae in #3963
• [nnx] improve docs by @cgarciae in #4141
• remove repeated license headers by @cgarciae in #4148
• update Flax to version 0.9.0 by @copybara-service in #4147

New Contributors

• @wenchenvincent made their first contribution in #3993
• @rajasekharporeddy made their first contribution in #4047
• @kaushaladiti-2802 made their first contribution in #4036
• @knightXun made their first contribution in #4077
• @danielwatson6 made their first contribution in #4079
• @cool-RR made their first contribution in #4056
• @treigerm made their first contribution in #4095
• @dcharatan made their first contribution in #4120

Full Changelog: v0.8.5...v0.9.0