Python App in macOS LaunchAgent Can't Reach the Internet? Here's the httpx Proxy Trap You Need to Know

Sat, 30 May 2026 09:00:00 +0800

TL;DR:

When a Python application using httpx with trust_env=True runs inside a macOS LaunchAgent, it silently picks up the system proxy settings from scutil --proxy. But the LaunchAgent process may not be able to reach that proxy server at all — resulting in All connection attempts failed or No route to host errors.

The fix is one line: add NO_PROXY=* to the LaunchAgent’s plist EnvironmentVariables.

This article documents the full debugging journey: from discovering that my AI Agent’s WeChat Enterprise (WeCom) messages weren’t being replied to, through methodical proxy troubleshooting, to finally pinning down the root cause — macOS system proxy + LaunchAgent network isolation. We’ll dive deep into Python httpx source code, macOS proxy architecture, and the many gotchas of LaunchAgent runtime environments.

The Complete AI Agent Migration Guide: A Real-World Journey from Scratch with 9 Pitfalls and Fixes

Sat, 30 May 2026 08:00:00 +0800

TL;DR:

Migrating from one AI Agent platform to another sounds like a “copy and paste” job. In reality, it’s a systems engineering challenge involving data migration, channel integration, scheduled tasks, auto-start configuration, proxy settings, and module compatibility.

This article documents my complete migration journey: from installing the new platform, migrating memories and skills, configuring messaging channels, debugging mysterious failures, to achieving fully automated operation. 9 pitfalls encountered, 9 solutions found — all shared here.

LaunchAgent on Margrop Blog

Python App in macOS LaunchAgent Can't Reach the Internet? Here's the httpx Proxy Trap You Need to Know

The Complete AI Agent Migration Guide: A Real-World Journey from Scratch with 9 Pitfalls and Fixes