Hi, I'm leeguoo (Guo Li)

Reverse engineering, AI agents, architecture decisions and tinkering notes. In three languages.

★ Featured Oct 7, 2026 · 4 min read

Choosing a Browser for Agents: Playwright’s Approach and chrome-use Are Not the Same Thing

I compare chrome-use’s connection to an existing Chrome session with the new and persistent contexts used by Playwright, Puppeteer, and browser-use, explaining session state, tab ownership, connection requirements, and the limits of fingerprint testing.

Latest

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Sep 30, 2026

4 min read

Making Claude Code and Codex talk to each other — even across two computers

I run Claude Code, Codex and Pi side by side, and they can't see each other. ocs gives every AI coding session a shared channel and actually wakes the target session — on one machine or across the computers on your LAN. How it works, and the "it said OK but the message was gone" bugs I had to design around.

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Sep 30, 2026

1 min read

Pastyx: everything you've copied on your Mac, one keystroke away

Copied a snippet, then a link, and lost the snippet? Pastyx remembers everything you copy. Press ⌘⇧V, pick, press Return. A native, local-first clipboard manager for macOS 26 — US$9.99 once, 7-day free trial.

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Sep 30, 2026

2 min read

ChooseBrowser: every link on your Mac opens in the right browser and Chrome profile

Juggling work, personal and test accounts? ChooseBrowser sends each link to the right browser and Chrome profile by your URL rules. US$4.99 once, 7-day free trial.

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Sep 17, 2026

5 min read

ChooseBrowser is on the Mac App Store: rules that decide which browser and which account opens every link

ChooseBrowser is a link router for macOS. Write rules by domain and path, and each link goes straight to the browser or Chrome profile you picked. Multi-account testing, separate work and personal accounts, juggling clients — set up once with rules. US$4.99, one-time purchase.

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Reverse Engineering & Security

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May 26, 2026

Facing AI Audits: How Can You “Legalize” Your Reverse Engineering Project?

Examines a practical approach to handling decompilation projects by combining Claude Code and Gemini CLI, focusing on the challenge of ownership verification and resolving it through an automated sanitization process.

AI & Agent

AI & Agents

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Jun 11, 2026

iphone-use: Let AI Agents Control a Real iPhone

Open-source real iPhone automation with a custom XCTest runner, CLI, HTTP API and MCP: read the screen, tap, type, remotely control and replay workflows.

May 29, 2026

Is the `cache 4m23s` Line in the Status Bar Actually Accurate?

There’s a prompt-cache countdown line in the status bar I wrote for Claude Code. Where it anchors, how the formula works, and when it lies to you — let’s pull apart the source code alongside a real transcript.

May 12, 2026

Dissecting the Implementation of the /goal Command

Based on the Claude Code 2.1.139 headless source code, this breaks down how the /goal command drives the Agent to keep working until a condition is met through a session-level Stop hook.