He Dong (董赫) — M.S. student at BIT, previously two AI engineering & evaluation internships at ByteDance. I build agent infrastructure, evaluation systems, and code-intelligence tools, and I ship the tests, traces, and rollback paths as part of the feature.
Everything Claude Code · external core contributor
| Area | What shipped | PRs |
|---|---|---|
| Performance | O(1) session-cost snapshots with O(Δ) catch-up: ~3,099× faster steady state on a 40.5 MB fixture | #3102 #3064 |
| Hook lifecycle | Ownership-aware, idempotent hook install / upgrade / doctor / repair / uninstall, backed by 177 focused tests | #2992 #2987 |
| Harness integrity | Project Hookify rules enforced in Claude's real hook lifecycle; deterministic Cursor dispatch; Python consumer audits | #3055 #3001 #3007 |
| Eval & CI | Capability gates before side effects, loss-safe archival, Unicode-safe CI | #2954 #2971 #2194 |
XERJ Corpus Hub · selected contributor — my ECC commit a50ee13, execute bounded local Hookify rules in lifecycle hooks (from #3055 · 19 files · 2,822 lines), was selected for the open reference memory that AI coding agents search before they write code.
| Project | What it does | Stack |
|---|---|---|
| RepoPilot demo ↗ |
Takes an issue or a failed CI run to a verified pull request, recording every decision, approval, and tool call in a tamper-evident chain | TypeScript · MCP · PostgreSQL |
| EmbodiGen showcase ↗ |
One task sentence in, photorealistic robot-learning episodes with exact action labels out; a validator rejects renders that drift from the ground-truth geometry | Python · zero deps |
| codemod-pilot | Infers AST rewrite rules from before/after examples, previews the diff, and keeps a rollback path before writing | Rust · tree-sitter |
| codex-jev-preflight demo ↗ |
Fail-open Codex hook that classifies every task by type, complexity, and risk before work starts | Python · Codex hooks |
| DRL MuJoCo | Distributed Actor–Learner PPO on Ray with parallel rollouts, multi-GPU training, and a Rust replay buffer | PyTorch · Ray · Rust |
| conda-helper PyPI ↗ |
Safe, cross-platform Conda backup, restore, clone, offline packing, and diagnosis | Python · Click |
Also: Quorum (low-interruption group agent, AWS Agents for Humans) · SlideCraft (AI slide skill, HTML + PPTX) · CaseAI (PRD → test suites)
Plus MCP · AgentTeams · evaluation harnesses · Ray · tree-sitter · OpenTelemetry · Fastify
Exploring reliable agent infrastructure, repository-scale code transformation, and scalable RL. Open to collaboration — wellkilo@foxmail.com
