Codex on Tokenise

Run Codex from a script: codex exec, structured output and CI

Sun, 04 Oct 2026 07:00:00 +0000

Codex isn’t only a terminal app you sit in front of. codex exec runs it without the interactive interface, so it can be a step in a script, a scheduled job or a CI pipeline. The non-interactive mode docs lay out the behavior, and the defaults tell you how OpenAI expects you to use it.

How Codex reads AGENTS.md, and how to layer it so the right rules win

Wed, 30 Sep 2026 17:00:00 +0000

Codex reads instructions from AGENTS.md files before it starts work, and it doesn’t read just one. It builds a chain of them, in a documented order, and the order decides which rule wins when two disagree. If you’ve ever had Codex ignore a rule you were sure you’d written down, the layering is the first place to look.

Stop telling your AI agent to 'fix the bug'. Make it reproduce it first

Wed, 30 Sep 2026 12:00:00 +0000

“Fix the login bug” is a terrible prompt for a coding agent, and a frustrating one to debug when it goes wrong. The agent will read some code, find something plausible, change it, and tell you it’s fixed. Sometimes it is. Sometimes it has patched a bug you didn’t have.