Hi there, I'm Lu Han (feuyeux) 👋

• 📖 Author of 《Java RESTful Web Service 实战》 (1st & 2nd ed.) — companion repos jax-rs2-guide, jax-rs2-guide-II and jax-rs2-atup, 380+ stars combined
• 🤖 Deep-diving the AI Agent ecosystem across 33 repos — LangChain / LangGraph / LlamaIndex / DSPy / PydanticAI / AutoGen / CrewAI / ADK / Parlant / Embabel / OxyGent, the agent protocols A2A · ACP · ANP · MCP, and coding-agent labs hello-claude-code, hello-skills, hello-hermes
• 🧪 Maintainer of the hello-* series — 99 runnable verification repos (of 149 public originals) covering frameworks, protocols and runtimes
• 🌐 Polyglot communication practitioner — hello-grpc implements gRPC in 12 programming languages, hello-websocket does the same for WebSocket, plus a 9-repo RSocket series across Java / Go / Node.js / Rust with token-based security variants
• 🦀 Building systems in Rust — iota-sympantos (see Current Focus), iota-cockpit, endorphin, hello-fory, hello-ort, rust-wasm-4-envoy
• 🎧 Exploring audio & acoustics on device — hello-acoustics, hello-audio-stream, hello-whisper, hello-edge-tts, hello-chat-tts
• ☁️ Cloud native & Service Mesh — asm-best-practises, hello-servicemesh-grpc, grpc_proxyless, mesh-perf, Envoy Wasm filters in Rust and AssemblyScript
• 🎨 Cross-platform apps & creative coding — Tauri (volant, mon-anniversaire), Flutter (alouette, korydallos, hello-app), color science (colors, color-rosetta)
• 📝 Writing on Alibaba Cloud Community
• 📍 Beijing, China · on GitHub since 2011 · 149 public original repos · 494 stars earned

My most recent work lives in the xp-iota organisation:

• 🛰️ iota-sympantos — a cross-platform Rust CLI/TUI that routes prompts to five ACP backends (claude-code / codex / gemini / hermes / opencode) on top of one shared memory, skills and context layer. SQLite-backed cross-backend memory (SHA-256 dedup, FTS5, 6 recall buckets), YAML-declared deterministic skills dispatched by a Rust engine, iota-fun snippet runner for 7 languages, a built-in Kanban with event sourcing for long-running agent tasks, a loopback-only warm daemon with owner-only token auth, and a ratatui inline TUI. ~1.4 MB of Rust plus a TypeScript surface.
• 📚 hello-olleh — a source-reading and comparison workspace for AI coding CLIs. Upstream snapshots of claude-code, codex, gemini-cli, opencode, hermes-agent, nanobot, cordis and deepseek-harness, paired with Markdown analyses of their startup paths, agent scheduling, tool systems, state management and extension mechanisms — plus a streaming-agent resilience study across all snapshots.

Merged upstream contributions — parlant#634 ZhiPuAI NLP adapter · awesome-grpc#198 Hello gRPC samples · Starship#180 graceful streaming reconnect · flagger#798 Flagger on Alibaba Cloud ASM · piano_teacher#1 portable launcher scripts

How the 149 public original repositories on this account break down by domain (the xp-iota projects above are counted separately):

The remainder is Java enterprise and JVM engineering — rules engines and workflow (hello-drools, hello-easy-rules, hello-liteflow, hello-camunda), resilience and observability (hello-resilience, hello-retry, hello-opentelemetry, hello-micrometer), serialization (hello-serialized, hello-avro, hello-json, hello-xml) and modern JVM features (hello-jdk24, hello-jdk25, hello-vector-api, hello-java-native).

Languages — badge order follows the primary-language count of my public original repos: Java 52 · Python 26 · Shell 13 · TypeScript 7 · JavaScript 6 · Rust 6 · Go 3 · C++ 3 · Dart 3 · HTML 3 · Jupyter 2 · Kotlin / Swift / PowerShell / CSS 1 each.

Frameworks & Platforms

mindmap
  root((Lu Han · feuyeux))
    Languages
      Java · 52 repos
      Python · 26
      Shell · 13
      TypeScript · 7 · JavaScript · 6
      Rust · 6
      Go · C++ · Dart · 3 each
      Kotlin · Swift · PowerShell
    AI Agent Ecosystem
      Frameworks
        LangGraph · LangChain
        DSPy · PydanticAI
        AutoGen · CrewAI
        ADK · Parlant · Embabel
        LlamaIndex · Llama Stack · OxyGent
      Protocols
        A2A · ACP · ANP · MCP
        aloha-a2a · hello-mcp
      Coding Agents
        iota-sympantos — 5 ACP backends
        hello-olleh — CLI source analysis
        hello-claude-code · hello-hermes
        hello-skills · agent-study
      LLM Engineering
        Context Engineering · Memory
        Stream Resilience Lab
        Dify · LangFlow
        MiniMax — minimax-mate · MiniMax-H3-macOS
      ML · CV · Audio
        ONNX Runtime · Triton · Ray
        YOLOv10
        Whisper · Edge-TTS · ChatTTS
        Acoustics · Audio Stream over WebSocket
    Polyglot Communication
      gRPC in 12 languages
      WebSocket in 12 languages
      RSocket — Java · Go · Node · Rust
      Kafka · Pulsar · MQTT
      Camel · EventBus · Queue
    Java Enterprise
      jax-rs2-guide I · II · atup
      Spring · Jersey · Java EE
      Drools · Easy Rules · LiteFlow · Camunda
      Resilience · Retry · Cache · Logging
      JDK 24 · 25 · Vector API · Native Image
      Serialization — Fory · Avro · JSON · XML
      OpenTelemetry · Micrometer · Spark · Samza
    Cloud Native · Service Mesh
      ASM Best Practises
      Proxyless gRPC · mesh-perf
      Envoy Wasm — Rust · AssemblyScript
      Docker · Kubernetes · Operator
    Rust Systems
      iota-sympantos · iota-cockpit
      endorphin · hello-fory · hello-ort
      Wasm · eBPF
    Apps · Cross-platform
      Tauri — volant · mon-anniversaire
      Flutter — alouette · korydallos · hello-app
      Web games — ins-outs · colosseum · lusine-a-reves
      Color science — colors · color-rosetta

_{Repository figures snapshot: 2026-09-15 — 168 public repos on this account = 149 originals + 19 forks, 494 stars, 288 followers; plus 2 public repos in the xp-iota org and 5 merged upstream pull requests. Counts are derived from the GitHub API, primary language per repo.}