Justin Chu
Building tools for AI and language. Senior engineer at Microsoft working on ONNX. Previously Google [X]. CMU alum.
AI Frameworks / Infra / Agentic AI
onnx-genai
A GenAI runtime for ONNX. Paged KV cache, continuous batching, speculative decoding, constrained generation, OpenAI-compatible server.
onnx-genai-wiki
Bilingual learning wiki on generative AI internals — KV cache, attention, quantization, speculative decoding, and more.
onnxruntime-mlx
MLX execution provider for ONNX Runtime. Native Apple Silicon inference for ONNX models.
Mobius
AI-native conversion and construction of ONNX models for generative AI at scale.
Flightdeck
Multi-agent orchestration platform. Lead/Director/Worker hierarchy with MCP tools, ACP client, and real-time coordination.
ONNX IR
A modern Python IR for ONNX. Designed from scratch for ergonomics, performance, and correctness.
ONNX Script
Authoring ONNX models in Python with a natural syntax. Powering torch.onnx export in PyTorch.
Apps
Vocapybara 🦫
Network-based language learning for 22 languages. Words organized as an interconnected graph — learn by association, not rote memorization. On-device AI, works offline.
PDF Redact
Local in-browser PDF redaction. Everything stays on your machine — no upload, no server.
web-praat
Browser-based acoustic analysis for phonetics. Spectrogram, formants, pitch tracking, TextGrid editing, Whisper transcription — zero install.
Formants
Real-time vowel visualization app. See your F1/F2 as you speak.
Open Source
pytorch/pytorch
onnx/onnx
onnx/ir-py
microsoft/onnxscript
onnx-safetensors
model-explorer-onnx
github-attention-set
lintrunner-adapters
Talks
torch.onnx APIs and Architecture — Jan 2026
PyTorch Conference 2025
ONNX Meetup 2025
ONNX Meetup 2024