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wire 2026-07-09
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JAX FIXES CUSTOM_VJP3 AUTODIFF BUGS; PYTHON-GENAI BREAKS BACKWARD COMPATIBILITY

By RepoJournal · Filed · About Google · Composed from the cited sources · methodology

copybara-service[bot] mattjj nbayati
3 people shipped this
copybara-service[bot] @copybara-service[bot] 2 cited mattjj @mattjj 1 cited nbayati @nbayati 1 cited

JAX shipped critical fixes to custom_vjp3 that were producing wrong-shaped outputs under vmap-of-jvp, while python-genai landed a breaking change removing three parameters and reshaping safety settings.

The JAX team patched custom_vjp3 to correctly handle symbolic-zero tangent avals in VmapOf.jvp [1], a bug that produced misshapen outputs when constants flowed through jvp-of-vmap combinations. The same PR also restored proper error messaging for jvp of symbolic_zeros=True custom_vjp, replacing bare NotImplementedError with the expected TypeError [2]. Separately, JAX's Pallas GPU support expanded with cp.async backing for copy_gmem_to_smem [3], controlled by a new impl parameter and supporting barriers for async waits. Over in python-genai, a major refactor [4] removes cached_content, presence_penalty, and frequency_penalty entirely while exposing safety_settings and labels without private SDK gates. This is a breaking change that will require client updates. The genai SDK also dropped the default api-revision header [5] to fix upstream issues. BigFrames 2.45.0 shipped with ai.classify, ai.score, and ai.if_ accessors for BigQuery DataFrames [6], plus local UDF execution support. Authentication landed new mTLS helpers [7] for custom connection pools to load default client certificates and resolve the GOOGLE_API_USE_MTLS_ENDPOINT environment variable.

Action items

References

  1. [1] [hijax] custom_vjp3 fixes: VmapOf sym-zero jvp, errors, pretty-printing google/jax ↗
  2. [2] [hijax] custom_vjp3 fixes: VmapOf sym-zero jvp, errors, pretty-printing ↗ google/jax
  3. [3] [pallas:mgpu] `plgpu.copy_gmem_to_smem` now supports `cp.async` ↗ google/jax
  4. [4] refactor(interactions)!: remove cached_content, presence_penalty, and frequency_penalty; expose safety_settings and labels ↗ googleapis/python-genai
  5. [5] chore: Remove default api-revision header ↗ googleapis/python-genai
  6. [6] bigframes: v2.45.0 ↗ googleapis/google-cloud-python
  7. [7] feat(auth): Implement python mtls helpers ↗ googleapis/google-cloud-python

$ ls google/reviews/ # the step-back reads

the week in review JAX drops legacy IFRT device APIs, google-auth adds 3.15 the month in review JAX free-threading push reshapes 0.11.2 and 0.12 cleanup
Full archive → Weekly reviews →

Quick answers

What shipped in Google on July 9, 2026?
JAX shipped critical fixes to custom_vjp3 that were producing wrong-shaped outputs under vmap-of-jvp, while python-genai landed a breaking change removing three parameters and reshaping safety settings. In total, 39 commits, 32 pull requests, and 1 releases landed.
Who contributed to Google on July 9, 2026?
3 developers shipped this update, including mattjj, copybara-service[bot], and nbayati.
What were the notable Google updates?
[hijax] custom_vjp3 fixes: VmapOf sym-zero jvp, errors, pretty-printing, [hijax] custom_vjp3 fixes: VmapOf sym-zero jvp, errors, pretty-printing, and [pallas:mgpu] `plgpu.copy_gmem_to_smem` now supports `cp.async`.
♥

$ log Google --recent

JAX pins OpenXLA revision, disables overlap_test against older libtpu 5 shipped JAX adds type-2 and type-3 Hermitian eigensolves, lexsort batching cuts unique compile time 69 shipped JAX hijax flags read at call time, Spanner stops deleting multiplexed sessions 112 shipped Vertex AI client timeout fix, Compute v1 API regenerated 87 shipped

$ log --all # elsewhere on the wire

@vuejs Vue language tools stop calling registerHooks on buggy Node builds @openclaw OpenClaw's deslop sweep removes 1,000+ production lines

$ ls showcases/

Rails Django Laravel Node.js Go Vercel Vue.js Kubernetes HashiCorp Arch Linux Linux Anthropic

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