BBuf/sglang-gemma4-optimization
skills/model-optimization/sglang/sglang-gemma4-optimization/SKILL.md
PR-backed optimization manual for Gemma 4 in SGLang. Use when an engineer needs to audit, debug, extend, or document Gemma 4 text, MoE, multimodal, reasoning, tool use, and quantized MoE serving.
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SKILL.md
- name:
- sglang-gemma4-optimization
- description:
- PR-backed optimization manual for Gemma 4 in SGLang. Use when an engineer needs to audit, debug, extend, or document Gemma 4 text, MoE, multimodal, reasoning, tool use, and quantized MoE serving.
SGLang Gemma 4 Optimization
Overview
This skill covers Gemma 4 text, MoE, multimodal, reasoning, tool use, and quantized MoE serving.
Evidence snapshot:
- SGLang mainline checked around
c122d343adb969cd9bbd1af2ca86727a11be3845 - sgl-cookbook checked around
e88b0fd8ac5b1caa6eb42766035029220053369b - Canonical PR notes:
references/pr-history.md - History mirrors:
model-pr-optimization-history/sglang/gemma4/README.zh.mdandREADME.en.md
Non-Negotiable Evidence Rule
Use skills/model-optimization/model-pr-diff-dossier/SKILL.md as the production bar.
Every PR cited for this family must be based on diff reading, not only PR titles.
Runtime Surfaces
sglang/python/sglang/srt/models/gemma4_causal.pysglang/python/sglang/srt/models/gemma4_mm.pysglang/python/sglang/srt/models/gemma4_vision.pysglang/python/sglang/srt/models/gemma4_audio.py
Current Main Summary
- Gemma 4 is a genuinely multi-surface family: text, MoE, multimodal, tool calling, and speculative decoding all matter.
- Fast prefill, quantized MoE, and tool-parser correctness are the main areas that changed rapidly after bring-up.
Key Landed PRs
- #21952
New Model: Gemma 4: Initial Gemma 4 support in SGLang. - #22079
Gemma4 nvfp4 fix: Fixed the NVFP4 launch path. - #22408
Adding Gemma 4 to Nightly CI: Added model-family regression coverage.
Validation Lanes
- Startup on the cookbook checkpoint or example route.
- Re-run the parser, quantization, or multimodal lane that matches this family.
- Re-check registered or manual tests after touching loader or processor code.
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