Ask HN: What are you working on? (September 2026)

Hacker News users share their current projects in a September 2026 thread, including someone rebuilding their X11 environment in POSIX shell and C for portability, another developer creating a custom IDE that integrates multiple AI coding agents and outperforms VS Code, and a creator who has spent 10 years developing Bonsai, a voxel game engine using SDF-based world editing, nearing completion with plans to launch on Steam by year-end.