Exploring AI. Recording the journey.

Hello, I’m
Hohoo.

From models to the real world.

Start with Java ↗Meet Hohoo →

01 / Writing

Selected writing

All writing →
01
Tutorials

Durable idempotency: commit identity and result together

Use a framed journal, process crashes and 99 truncated prefixes to explain durable idempotency.

10 min↗
02
Tutorials

Outbox delivery: local durability is not remote exactly-once

Compare keyed and unkeyed receivers to separate lost replies, missing receipts and duplicate remote effects.

10 min↗
03
Tutorials

Conversation recovery: reconcile intent, receipt and whole turn

Halt the JVM at three commit boundaries and rebuild whole-turn history from durable facts.

10 min↗
04
Engineering cases

MuJoCo controller tuning: best candidate is not a passing controller

Select on 54 development episodes, then check position error and stable completion on 36 held-out episodes.

10 min↗

02 / Builds

Ideas, made tangible

All builds →

Project structure / Schematic

Java → AI
  1. 01Request
  2. 02Parse
  3. 03Validate output

Recorded excerpt · original Chinese

你：我正在学习Java
助手：很好！Java 是一门非常实用且广泛应用的编程语言。

你：我正在学习什么
助手：你正在学习 Java！如果需要帮助或有任何问题，随时告诉我。

From the author's run; the first answer is excerpted. This is not a live API call.

Conversation · recorded run

Conversation · recorded run

Project / 002Building

Java LLM Practice ↗

Reproducible Java conversation, retry and persistence boundaries, alongside attention, cache-cost and quantization-error experiments.

Explore conversation memory →

Java 8 · Gson · HTTP · TypeScript · Node.js · Python · NumPy

Project structure / Schematic

MuJoCo → Action
  1. 01Contact
  2. 02Compare offsets
  3. 03Audit trajectories
Contact-based cube pickup in a fixed scene, without a trained policy.
MuJoCo simulation recording

MuJoCo simulation recording

Project / 003Experiment

Hohoo Embodied Experiments ↗

Two MuJoCo teaching scenes—pick-and-place and planar force control—record contracts, tuning, clearance and delayed-feedback outcomes, including failures.

Python 3.12 · MuJoCo 3.3.7 · NumPy · Matplotlib

Think with your hands

Turn an idea into an observation.

Start with a duplicate message, a conversation or an obstacle. Browser exercises, no API key required.

Take a different path?Open curiosity compass

Curiosity compass

Where will curiosity take you?

Choose how to explore

Start with published writing and take away a new understanding.

Site writing ·

Durable idempotency: commit identity and result together →

Use a framed journal, process crashes and 99 truncated prefixes to explain durable idempotency.

From existing content · No preference tracking

03 / Learning tracks

Four directions. Deeper understanding.

01 / BUILD

AI Applications

↗
02 / UNDERSTAND

LLM Notes

↗
03 / EXPLORE

Embodied AI

↗
04 / Retrieve

RAG · Retrieval-augmented generation

↗

04 / External signals

AI Radar

Explore Radar →

Cursor 披露 Claude Code VS Code 扩展被植入恶意软件事件，最多影响 5000 用户 ↗

Cursor 发现通过其 IDE 扩展市场分发的 Claude Code VS Code 扩展被修改并植入恶意软件，最多影响 5000 用户，恶意版本并非 Anthropic 开发。Cursor 已于当日下午下线扩展市场，与相关提供方合作清除恶意软件并确认无进一步风险后重新上线，建议受影响用户参考博客说明排查，并升级到 Claude Code for …

AIHOT · Source excerpt / External coverage

Visitor footprints

Anonymous aggregates · Vercel

Loading statistics…

About these statistics

No public IPs, cities or individual trails. Vercel anonymous visitor estimates are not a count of real people. Only production page views are tracked, without query strings or fragments; search text, private notes and learning records are not analytics events.

Vercel privacy documentation ↗