Codex Builds a Sandbox to Test Whether It Is in a Sandbox
StewartalsopIII · x · 2026-09-28
A user shares a delightful moment: when given a task, Codex built its own sandbox to test whether it was itself running inside a sandbox — instructions on the left, the sandbox it constructed on the right.
More from coding & agent
- Dev Laments: Even Cursor Can't Nail a Text Editor — AI Coding Tools in 'Teenage Phase' — jcran · 2026-09-28
- Dev builds conference slides as Go TUI apps with Claude, served over SSH — nptacek · 2026-09-28
- Claude Code tip: run 5 subagents to audit 20 things before shipping a vibe-coded site — udmrzn · 2026-09-28
- Analyst says Opus 5.5 one-shot financial model passes his 'modeling Turing test' — rickasaurus · 2026-09-28
- Walrus Memory makes agent context portable across LLMs — udmrzn · 2026-09-28
- Dev builds a fast photo viewer app with Astra, labels via Luna — banteg · 2026-09-28