[Core][V0] Enable regex support with xgrammar #13228

russellb · 2025-02-13T15:30:14Z

We already support this in V1. This is just low hanging fruit to enable in V0 as well.

github-actions · 2025-02-13T15:30:26Z

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terrytangyuan

Would it be a good idea to check xgrammar version and print out warning if they are using an old version?

russellb · 2025-02-13T23:23:01Z

Would it be a good idea to check xgrammar version and print out warning if they are using an old version?

hm, I'm not sure we do that other places. We just assume the code has what we express is required in the requirements files. You're on your own if you veer outside of that!

mergify · 2025-02-15T05:36:15Z

This pull request has merge conflicts that must be resolved before it can be
merged. Please rebase the PR, @russellb.

https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/working-with-forks/syncing-a-fork

Ubospica

I think it should work fine with xgrammar. Thanks @russellb !

vllm/model_executor/guided_decoding/xgrammar_decoding.py

russellb · 2025-02-18T02:35:56Z

marked as a draft again as the pin to 0.1.11 is intentional to avoid a bug introduced in 0.1.13. I'll revisit this again after a release that resolves the bug in question.

#13338

mergify · 2025-03-11T15:46:34Z

This pull request has merge conflicts that must be resolved before it can be
merged. Please rebase the PR, @russellb.

https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/working-with-forks/syncing-a-fork

requirements-common.txt

russellb · 2025-03-11T17:16:33Z

This should be ready now

aarnphm · 2025-03-16T14:10:41Z

superseded by #14868

vllm/model_executor/guided_decoding/__init__.py

simon-mo · 2025-03-17T04:33:15Z

Removing this from v0.8.0 because it is not a bugfix. We will release another version soon for features.

aarnphm · 2025-03-17T04:52:47Z

wfm. we can have more time to fix bugs instead of rushing it in.

Copilot

Pull Request Overview

This PR enables regex support in xgrammar by updating the grammar configuration and modifying the guided decoding logic. Key changes include adding a new regex_str field to GrammarConfig, adding a branch to handle regex-guided decoding in from_guided_params and _ensure_ctx, and updating test cases and fallback logic accordingly.

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
vllm/model_executor/guided_decoding/xgrammar_decoding.py	Adds regex_str to configuration, handles regex-guided decoding in from_guided_params and _ensure_ctx
vllm/model_executor/guided_decoding/init.py	Removes fallback check for regex support in favor of JSON validation
tests/entrypoints/llm/test_guided_generate.py	Updates tests to verify failure when unsupported JSON schema features are provided

Comments suppressed due to low confidence (1)

vllm/model_executor/guided_decoding/xgrammar_decoding.py:253

To prevent ambiguity when multiple guided decoding options are provided, consider validating that only one of grammar, json, or regex is set in guided_params.

elif guided_params.regex:

vllm/model_executor/guided_decoding/xgrammar_decoding.py

mergify · 2025-04-03T10:49:19Z

This pull request has merge conflicts that must be resolved before it can be
merged. Please rebase the PR, @russellb.

https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/working-with-forks/syncing-a-fork

Now that we're on a new enough version of xgrammar, this can be turned on. Signed-off-by: Russell Bryant <rbryant@redhat.com>

Ubospica · 2025-04-14T02:15:34Z

Thanks for your awesome work! @russellb @aarnphm @simon-mo @DarkLight1337

Signed-off-by: Russell Bryant <rbryant@redhat.com> Signed-off-by: Yang Wang <elainewy@meta.com>

@LucasWilkinson

SUMMARY: sync to upstream `v0.8.4` and cherry-pick of `7eb42556281d30436a3a988f2c9184ec63c59338`. the cherry-pick is @LucasWilkinson 's llama4 patch. GIT LOG: ```bash commit b197179 (HEAD -> sync-upstream-v0.8.4, origin/sync-upstream-v0.8.4) Author: Lucas Wilkinson <LucasWilkinson@users.noreply.github.com> Date: Fri Apr 18 01:13:29 2025 -0400 [BugFix] Accuracy fix for llama4 int4 - improperly casted scales (vllm-project#16801) Signed-off-by: Lucas Wilkinson <lwilkinson@neuralmagic.com> commit 60267cc Author: andy-neuma <andy@neuralmagic.com> Date: Mon Apr 21 14:57:52 2025 -0400 remove duplicate entries commit 9d18b50 Merge: db0e117 dc1b4a6 Author: andy-neuma <andy@neuralmagic.com> Date: Mon Apr 21 14:50:01 2025 -0400 Merge remote-tracking branch 'upstream/v0.8.4' into sync-upstream-v0.8.4 commit db0e117 Author: andy-neuma <andy@neuralmagic.com> Date: Mon Apr 21 14:35:23 2025 -0400 Revert "Revert "[V1] DP scale-out (1/N): Use zmq ROUTER/DEALER sockets for input queue (vllm-project#15906)"" This reverts commit 296c657. commit dc1b4a6 (tag: v0.8.4, upstream/v0.8.4) Author: Russell Bryant <rbryant@redhat.com> Date: Sun Apr 13 22:13:38 2025 -0400 [Core][V0] Enable regex support with xgrammar (vllm-project#13228) Signed-off-by: Russell Bryant <rbryant@redhat.com> ``` COMMANDS: ```bash git fetch upstream git checkout -b sync-upstream-v0.8.4 git revert 296c657 git merge upstream/v0.8.4 git cherry-pick 7eb4255 ``` TEST PLAN: accept sync ... https://github.com/neuralmagic/nm-cicd/actions/runs/14581880024 release ... https://github.com/neuralmagic/nm-cicd/actions/runs/14596026989 --------- Signed-off-by: Tristan Leclercq <tristanleclercq@gmail.com> Signed-off-by: yihong0618 <zouzou0208@gmail.com> Signed-off-by: reidliu41 <reid201711@gmail.com> Signed-off-by: Harry Mellor <19981378+hmellor@users.noreply.github.com> Signed-off-by: chaunceyjiang <chaunceyjiang@gmail.com> Signed-off-by: Jinzhen Lin <linjinzhen@hotmail.com> Signed-off-by: Jonghyun Choe <andy.choe729@gmail.com> Signed-off-by: Lu Fang <fanglu@fb.com> Signed-off-by: Hyesoo Yang <hyeygit@gmail.com> Signed-off-by: Ben Jackson <ben@ben.com> Signed-off-by: Roger Wang 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Signed-off-by: Russell Bryant <rbryant@redhat.com>

Signed-off-by: Russell Bryant <rbryant@redhat.com> Signed-off-by: Mu Huai <tianbowen.tbw@antgroup.com>

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[Frontend] Add backend-specific options for guided decoding #13505

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[Feature] Enable XGrammar Regex Support #15155

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[Core][V0] xgrammar regex support

561ea37

Now that we're on a new enough version of xgrammar, this can be turned on. Signed-off-by: Russell Bryant <rbryant@redhat.com>

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[Core][V0] Enable regex support with xgrammar (vllm-project#13228)

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Signed-off-by: Russell Bryant <rbryant@redhat.com> Signed-off-by: Yang Wang <elainewy@meta.com>

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[Core][V0] Enable regex support with xgrammar (vllm-project#13228)

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[Core][V0] Enable regex support with xgrammar (vllm-project#13228)

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[Core][V0] Enable regex support with xgrammar (vllm-project#13228)

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Signed-off-by: Russell Bryant <rbryant@redhat.com> Signed-off-by: Mu Huai <tianbowen.tbw@antgroup.com>

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[Core][V0] Enable regex support with xgrammar #13228

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