build(jax): split pinned cpu and gpu groups (#5436)

Problem
- CPU and CUDA CI need different pinned JAX dependency groups.
- The public `jax` extra should stay unchanged.

Change
- Keep the existing `jax` optional dependency as plain `jax`.
- Split the pinned groups into `pin_jax_cpu` and `pin_jax_gpu`.
- Use `pin_jax_cpu` in CPU jobs and `pin_jax_gpu` in the CUDA job.

Validation
- `git diff --check`
- `uv pip compile pyproject.toml --group pin_jax_cpu --python-version
3.10`
- `uv pip compile pyproject.toml --group pin_jax_gpu --python-version
3.10`

Authored by OpenClaw (model: gpt-5.5)


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Chores**
  * Split JAX dependency pins into separate CPU and GPU variants.
* Updated CI workflows to install the appropriate JAX package group for
CPU or GPU runs.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Author: njzjz-bot

.github/workflows/test_cc.yml

@@ -44,7 +44,7 @@ jobs:
       - run: python -m pip install uv
       - name: Install Python dependencies
         run: |
-          source/install/uv_with_retry.sh pip install --system --group pin_tensorflow_cpu --group pin_pytorch_cpu --group pin_jax --torch-backend cpu
+          source/install/uv_with_retry.sh pip install --system --group pin_tensorflow_cpu --group pin_pytorch_cpu --group pin_jax_cpu --torch-backend cpu
           export TENSORFLOW_ROOT=$(python -c 'import importlib.util,pathlib;print(pathlib.Path(importlib.util.find_spec("tensorflow").origin).parent)')
           source/install/uv_with_retry.sh pip install --system -e .[cpu,test,lmp,jax] mpi4py mpich
       - name: Convert models

.github/workflows/test_cuda.yml

@@ -43,7 +43,7 @@ jobs:
           && sudo apt-get -y install cuda-12-3 libcudnn8=8.9.5.*-1+cuda12.3
         if: false # skip as we use nvidia image
       - run: python -m pip install -U uv
-      - run: source/install/uv_with_retry.sh pip install --system --group pin_tensorflow_gpu --group pin_pytorch_gpu --group pin_jax "jax[cuda12]"
+      - run: source/install/uv_with_retry.sh pip install --system --group pin_tensorflow_gpu --group pin_pytorch_gpu --group pin_jax_gpu
       - run: |
           export PYTORCH_ROOT=$(python -c 'import torch;print(torch.__path__[0])')
           export TENSORFLOW_ROOT=$(python -c 'import importlib.util,pathlib;print(pathlib.Path(importlib.util.find_spec("tensorflow").origin).parent)')

.github/workflows/test_python.yml

@@ -31,7 +31,7 @@ jobs:
           source/install/uv_with_retry.sh pip install --system openmpi --group pin_tensorflow_cpu --group pin_pytorch_cpu --torch-backend cpu
           export TENSORFLOW_ROOT=$(python -c 'import importlib.util,pathlib;print(pathlib.Path(importlib.util.find_spec("tensorflow").origin).parent)')
           export PYTORCH_ROOT=$(python -c 'import torch;print(torch.__path__[0])')
-          source/install/uv_with_retry.sh pip install --system -e .[test,jax] mpi4py --group pin_jax
+          source/install/uv_with_retry.sh pip install --system -e .[test,jax] mpi4py --group pin_jax_cpu
           source/install/uv_with_retry.sh pip install --system --find-links "https://www.paddlepaddle.org.cn/packages/nightly/cpu/paddlepaddle/" --index-url https://pypi.org/simple --trusted-host www.paddlepaddle.org.cn --trusted-host paddlepaddle.org.cn paddlepaddle==3.4.0.dev20260310
         env:
           # Please note that uv has some issues with finding

pyproject.toml

@@ -175,9 +175,12 @@ pin_pytorch_cpu = [
 pin_pytorch_gpu = [
   "torch==2.10.0",
 ]
-pin_jax = [
+pin_jax_cpu = [
   "jax==0.5.0;python_version>='3.10'",
 ]
+pin_jax_gpu = [
+  "jax[cuda12]==0.5.0;python_version>='3.10'",
+]
 
 [tool.setuptools_scm]