AI systems first · AI for Science alongside
Master's student at Zhejiang University. I build reproducible systems to understand language models, with a growing focus on reliable inference and stateful agent APIs.
External PRs authored by me and merged upstream. Verified September 12, 2026.
Agentic API #257 adds bounded transient response sessions, continuation history, retention accounting, and cancellation cleanup. Approved and merged September 11, 2026 (UTC). The final version includes maintainer-contributed WebSocket integration.
Agentic API #258 rejects unsupported message-file inputs on typed Responses paths. Merged September 9, 2026 (UTC), including maintainer-contributed schema and validation updates.
WebCodex #372 waits for npm installer download streams to close before cleanup. Merged September 10, 2026 (UTC).
vLLM-Omni #7065 fixes Higgs Audio v3 voice-clone token validation while preserving reference-audio placement across chunked prefill. Merged after collaborator review on September 4, 2026 (UTC).1
DeePMD-kit #6010 excludes virtual
atoms from force, Hessian and spin-force error metrics while preserving padded detail
outputs. Approved and merged by project member njzjz on September 7, 2026 (UTC).2
Speculators #1096 fixes
multi-engine evaluation undercount by summing per-position acceptance counters
across engines. Approved and merged by fynnsu on September 8, 2026 (UTC).3
MACE #1712 rejects HTML responses
before caching model downloads. Approved and merged by aacostadiaz on
September 9, 2026 (UTC).4
ONNX Runtime #32435
prevents identity transposes from being incorrectly fused into Gemm, with
regression coverage for input, output and mixed transpose paths. Approved and
merged by xadupre on September 9, 2026 (UTC).5
| Track | Engineering focus | Public work |
|---|---|---|
| Agentic API | Bounded response sessions; continuation and storage contracts | #257, #258 — merged; replay-catalog collaboration in Zheng-Lu's #261 — open6 |
| vLLM-Omni | Audio efficiency; duplex lifecycle; reproducible multi-session validation | Mimi #7399, cancellation #7429, sample-rate snapshots #7448 — open; validation #7428 — draft7 |
| Vime | Post-training data ordering, resume correctness, and numerical precision | cursor #416, entropy #419, RoPE #420 — open |
| XGrammar | Structured-generation tool input validation | #881 — draft; local regression verified, awaiting review8 |
| DeePMD-kit | Ragged graph batching; charge/spin and numerical correctness | #6008 — open at last check9; #6010 — merged2 |
| MACE | Scientific model downloads and TorchScript export | #1712 — merged4; #1717 — draft at last check10 |
These are contribution areas I am working toward maintaining, not assigned module ownership. Open and draft PRs are not accepted contributions. The dated contribution log separates merged work, review candidates, and unpublished experiments.
| Project | Focus |
|---|---|
| wechat-ai-memory | Local-first, traceable conversation context |
| CS336 Assignment 1 | From-scratch language-model foundations |
| cs336.2026 | Systems-first learning and implementation notes |
Case study: honoring Router queue deadlines under contention — token, queue and HTTP regressions; CI-pinned Rust validation; PR #248 submitted after personal review and sign-off; awaiting upstream review, not merged.
Case study: preserving heterogeneous conversation data in GuideLLM — identical baseline/candidate regressions and a real CLI-to-localhost HTTP check; issue evidence shared, patch unpublished and personal review pending.
Case study: preserving Vime's sample stream across epochs — matched baseline/candidate tests and real cursor save/load; PR #416 is open after personal verification and sign-off; not an accepted fix.
Case study: validating an XGrammar parser-history regression — attributed fork candidate with deterministic tests and bytewise mask comparisons; upstream coordination pending, not merged.
Case study: checkpoint-save failure and distributed recovery — real CPU/Gloo failure reproduction with a matched successful-save control; PR #3151 closed without merging; upstream acceptance and GPU/NCCL coverage are not claimed.
- Reproduce failures and preserve passing controls before changing behavior.
- Keep patches scoped, with explicit dependency and compatibility boundaries.
- Separate local tests, upstream CI, and actual model/hardware validation.
- Explain design decisions and respond to review with reproducible evidence.
Python · Rust · PyTorch · pytest · Git · uv
Build the smallest useful version. Test the assumptions. Explain what happened.
Footnotes
-
vLLM-Omni. Merged PR #7065. ↩
-
DeePMD-kit. Merge commit 28b7d068. Merged September 7, 2026, 22:14 UTC (September 8, 06:14 Asia/Shanghai); verified directly on September 8. This is an accepted contribution, not an assigned module-maintainer role. ↩ ↩2
-
Speculators. Merge commit 04e08de9. PR authored by
LOGO127, merged September 8, 2026, 21:19 UTC (September 9, 05:19 Asia/Shanghai); verified September 9. This is an accepted contribution, not a module-maintainer appointment or a throughput benchmark. ↩ -
MACE. Merge commit 52302120. PR authored by
LOGO127, merged September 9, 2026, 10:37 UTC (18:37 Asia/Shanghai); verified directly. No module-maintainer appointment is implied. ↩ ↩2 -
ONNX Runtime. Merge commit b905e946. PR authored by
LOGO127, merged September 9, 2026, 11:48 UTC (19:48 Asia/Shanghai); verified directly. This is a graph-optimizer correctness contribution, not a performance benchmark or a maintainer appointment. ↩ -
Agentic API. Sessions #257 and typed Responses file validation #258 are merged, verified September 12, 2026. Final integration includes other contributors' work; sole authorship of every merged line, complete #238 coverage, and module ownership are not claimed. #261 is another author's PR and is not included in my authored merge count. ↩
-
vLLM-Omni. Current statuses checked September 12, 2026. Reference-audio diagnostics #7098 and shared RPC deadline #7151 also remain open. Passing build/documentation checks are not full GPU/model validation. ↩
-
XGrammar. Malformed function-tool validation #881, head
a79fd29, checked September 8, 2026. Draft publication is not upstream acceptance; local tests are not upstream CI. ↩ -
DeePMD-kit. Ragged charge/spin batching #6008. Open at the September 6 check; #6010's later merge is recorded separately below. ↩
-
MACE. Gated-block TorchScript export #1717 was an open draft at the September 8, 2026 check, not counted as merged. #1712's later merge is recorded in footnote 9. ↩