These prompts run in the Codex app. Several of them are meta — they ask Codex to manage threads, goals, and child threads — so expect the app to create and reference other threads as they execute.
Scope every thread to one sentence
A thread holds a prompt, the model's work, and every tool call along the way — and it's scoped to a project at creation. The practical disciplines: pick the project folder before you start the thread, name the thread for its outcome, and when you can't state the goal in one sentence, that's two threads.
Long-lived kitchen-sink threads degrade in quiet ways: stale context crowds out current intent, and the agent starts serving the conversation's history instead of your goal.
You do Choose the project first, then open the thread. Name it for the outcome. Kill-and-replace threads that have drifted.
The AI does Tells you when the current thread has accumulated enough conflicting context that a fresh start would serve you better.
Act as this thread's health monitor from here on.