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feat: Add router_logits override to enable Routing Replay for MoE models#44951

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hemantmm wants to merge 3 commits intohuggingface:mainfrom
hemantmm:router_logits
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feat: Add router_logits override to enable Routing Replay for MoE models#44951
hemantmm wants to merge 3 commits intohuggingface:mainfrom
hemantmm:router_logits

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@hemantmm
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@hemantmm hemantmm commented Mar 23, 2026

What does this PR do?

This pull request adds routing replay functionality for mixture-of-experts (MoE) model types by giving users the option to override router probabilities while processing a forward pass through their models.

Fixes #42638

Code Agent Policy

The Transformers repo is currently being overwhelmed by a large number of PRs and issue comments written by
code agents. We are currently bottlenecked by our ability to review and respond to them. As a result,
we ask that new users do not submit pure code agent PRs at this time.
You may use code agents in drafting or to help you diagnose issues. We'd also ask autonomous "OpenClaw"-like agents
not to open any PRs or issues for the moment.

PRs that appear to be fully agent-written will probably be closed without review, and we may block users who do this
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This is a rapidly-evolving situation that's causing significant shockwaves in the open-source community. As a result,
this policy is likely to be updated regularly in the near future. For more information, please read CONTRIBUTING.md.

  • I confirm that this is not a pure code agent PR.

Who can review?

@ArthurZucker @Cyrilvallez

Anyone in the community is free to review the PR once the tests have passed. Feel free to tag
members/contributors who may be interested in your PR.

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[For maintainers] Suggested jobs to run (before merge)

run-slow: mixtral, qwen2_moe, qwen3_moe

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View the CircleCI Test Summary for this PR:

https://huggingface.co/spaces/transformers-community/circle-ci-viz?pr=44951&sha=bbc249

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@ArthurZucker, can you review this PR?

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Routing Replay for MoEs

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