[Bugfix][Model] Fix mypy safe-super error in EmbeddingGemma2Model

[ywang96]

Overview

Fix the mypy pre-commit failure on main introduced by #60254 (EmbeddingGemma2Model): super().__init__() in a class inheriting VllmModelForPooling (a Protocol) trips [safe-super] + [call-arg].

Claims

• Fixes the 2 mypy errors at vllm/model_executor/models/embedding_gemma2.py:1023 that break the mypy-3.10–mypy-3.13 pre-commit hooks on main.
• No runtime behavior change: the MRO already resolved super().__init__() to nn.Module.__init__; this makes the call explicit.
• Not a duplicate: checked open PRs for embedding_gemma2 / safe-super / [Model] Support EmbeddingGemma2 multimodal pooling architecture #60254 follow-ups — none address this.

Validation

# Fails on main, passes with this change (2 errors -> 0)
mypy --python-version 3.10 vllm/model_executor/models/embedding_gemma2.py
# Also verified: --python-version 3.11, 3.12, 3.13

# The hook as CI runs it, on every file #60254 touched
python tools/pre_commit/mypy.py 3.10 \
  vllm/model_executor/models/embedding_gemma2.py \
  tests/models/multimodal/pooling/test_embedding_gemma2.py \
  vllm/model_executor/models/config.py \
  vllm/model_executor/models/registry.py \
  vllm/multimodal/video.py \
  vllm/v1/attention/ops/triton_prefill_attention.py \
  tests/models/registry.py

ruff check vllm/model_executor/models/embedding_gemma2.py
ruff format --check vllm/model_executor/models/embedding_gemma2.py

All pass. The change is typing-visible only (super().__init__() already resolved to nn.Module.__init__ at runtime), so no model eval was run; happy to run one if reviewers want it.

Details

Root cause: VllmModel/VllmModelForPooling are Protocols whose __init__ requires vllm_config. When a class explicitly inherits such a Protocol, mypy treats the protocol's trivial-body __init__ as the abstract method reachable via super().__init__() and rejects the argument-free call. Fix follows the established codebase pattern (nn.Module.__init__(self) in llama_eagle3.py, cohere_eagle.py, opencua.py, qwen3_dflash.py, openpangu_mtp.py).

AI assistance (Kimi Code) was used to prepare this PR; the submitter has reviewed the change.

---

Pull Request Checklist

• I used vLLM's /pr-checklist skill. (Mandatory for agents, optional for humans).

• AI assistance was used during the creation of this PR.

• Design Fit: Minimizes impact on core components, reuses existing functionality, and justifies added complexity.

• Testing and Validation: Validates the change and ensures any added tests are meaningful and reliable, with CI coverage or documented CI resource constraints and validation performed outside CI.

• Code Quality and Style: Keeps code and comments clear and concise, and updates relevant documentation and examples.

• Pull Request Contents: Includes a brief summary and relevant links, supports claims with evidence, explains root causes and implementation trade-offs, and follows the contributing guide.

[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.

[ywang96]

/ci-run

[khluu]

/ci run

[github-actions]

✅ Triggered Buildkite CI #93162 for commit 64787c2bf63c.