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[DO NOT MERGE] Feat/nnx set defaults true g3 test#4146

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feat/nnx-set-defaults-true-g3-test
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[DO NOT MERGE] Feat/nnx set defaults true g3 test#4146
ecnal-cienet wants to merge 1 commit into
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feat/nnx-set-defaults-true-g3-test

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@ecnal-cienet ecnal-cienet commented Jun 11, 2026

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Description

This PR is used for testing Google internal G3 tests.

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@ecnal-cienet ecnal-cienet changed the title Feat/nnx set defaults true g3 test [DO NOT MERGE] Feat/nnx set defaults true g3 test Jun 11, 2026
@ecnal-cienet ecnal-cienet force-pushed the feat/nnx-set-defaults-true-g3-test branch from b6622f3 to 152195e Compare June 11, 2026 20:12
@ecnal-cienet ecnal-cienet marked this pull request as ready for review June 11, 2026 20:12
@ecnal-cienet ecnal-cienet force-pushed the feat/nnx-set-defaults-true-g3-test branch from 152195e to 02122fd Compare June 15, 2026 17:18
PR6-PR10 promoted every routed-to-Linen feature to NNX-native. This PR flips the three defaults in base.yml so NNX is the production path, pins Linen-coupled tests so the flip doesn't silently swap their backend, and bundles the NNX-only fixes that surface once pure_nnx=True (DiLoCo merge/checkpoint, Zero-1 input shardings on flat nnx.State, MTP sown-Variable handling, generate_param_only_checkpoint NNX flow, maxengine Linen-parity removal).

NNX pipeline parallelism deferred to PR11.5; train_compile fails fast under pure_nnx=True with pipeline configured.
@ecnal-cienet ecnal-cienet force-pushed the feat/nnx-set-defaults-true-g3-test branch from 02122fd to 7310be3 Compare June 15, 2026 19:53
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