Revert "Remove native Hunyuan V1 and VL implementations"

[khluu]

Why

This reverts #53272 because it deterministically breaks the CPU Multimodal Processor test matrix after switching HunyuanOCR to the Transformers HunYuanVLProcessor:

ValueError: HunYuanVL image placeholders must be formatted as
<｜hy_place▁holder▁no▁100｜><｜hy_place▁holder▁no▁102｜><｜hy_place▁holder▁no▁101｜>

The merged commit d53b1c2e is the first affected main commit. Main Buildkite #85049 fails CPU Multimodal Processor shards 1 and 4 in three HunyuanOCR test_processing_correctness cases.

The exact PR-head Buildkite #85016 selected all four CPU Multimodal Processor shards and failed the identical HunyuanOCR cases in shards 1 and 4 while shards 2 and 3 passed. This is deterministic code evidence rather than runner noise.

Duplicate-work check

Searched open PRs for 53272, HunyuanOCR placeholder processor, and revert Hunyuan native removal; no existing revert or equivalent fix was found.

Validation

• git diff HEAD^ --check
• Verified this commit is the exact inverse of merge commit d53b1c2e with git apply --check --reverse
• Signed-head Buildkite #85060 at exact commit 6a5bbcbad020a062572c06344c523dae107ac3f6: CPU Multimodal Processor shard 1 passed on ip-10-0-34-197 at 17:43:16 UTC and shard 4 passed on ip-10-0-4-137 at 17:39:47 UTC
• Build #85060 is red only because the branch also encounters the independent open [ROCm][Perf] Kimi-K3 Fused kernels for KDA prefill #52606 Kimi AMD image regression; both required CPU gates passed

No model evaluation is applicable because this is an emergency rollback restoring the implementation and test behavior present immediately before the breaking merge.

Merge gate

Keep this draft until human line-by-line review. The incident remains open after pre-merge validation and closes only after merge plus exact post-merge main CPU Multimodal shards 1 and 4 pass.

AI assistance

AI assistance was used to investigate the CI failure, prepare the revert, and draft this PR. The human submitter must review every changed line and can explain and defend the change end-to-end.

[khluu]

/ci run

[mergify]

Documentation preview: https://vllm--53296.org.readthedocs.build/en/53296/

[khluu]

/ci run

[github-actions]

✅ Triggered Buildkite CI #85060 for commit 6a5bbcbad020.

[github-actions]

✅ CI is already running for this commit: https://buildkite.com/vllm/ci/builds/85060

[khluu]

Signed-head exact run is Buildkite #85060. CPU Multimodal Processor shards 1 and 4 are selected and currently waiting behind image prerequisites; awaiting terminal results.

[DarkLight1337]

Shouldn't we just remove the tests that depend on the removed model?

[khluu]

Partial signed-head result: Buildkite #85060 CPU Multimodal Processor shard 4 passed at exact head 6a5bbcbad020a062572c06344c523dae107ac3f6; shard 1 remains running. The branch AMD image failures are the independent open #52606 Kimi regression and do not block the CPU validation gate.

[khluu]

Strict signed-head validation is complete: Buildkite #85060 ran at exact commit 6a5bbcbad020a062572c06344c523dae107ac3f6. CPU Multimodal Processor shard 1 passed on ip-10-0-34-197 at 17:43:16 UTC, and shard 4 passed on ip-10-0-4-137 at 17:39:47 UTC. These are the two shards that deterministically failed the HunyuanOCR placeholder cases on main #85049 and culprit PR-head #85016. Build #85060 is red only because this branch also sees the independent open #52606 Kimi AMD image regression; the required CPU revert gate is green. Keep the incident open until human review/merge plus exact post-merge main confirmation.

[claude]

Claude Code Review

This pull request is from a fork — automated review is disabled. A repository maintainer can comment @claude review to run a one-time review.

[AndreasKaratzas]

/ci run

[github-actions]

✅ Triggered Buildkite CI #85108 for commit f353de1221cd.

[njhill]

@DarkLight1337 agree usually but so many things were breaking we just need to stabilize CI urgently.