TL;DR"Plan first, confirm, then write" shouldn't depend on willpower. Official best practices list planning as a standard move, and a high-scoring HN post treats weak agent planning as the norm — together they justify a default you can lock in.
Sources SOURCES
Distilled from public community discussions. This page only breaks them down and verifies — it never reposts the original; opinions belong to their authors.
Facts FACTS
Check these claims against the listed sources. For allowance mechanics, first-party account displays outrank community summaries.
- Official best practices flag plan first, then execute as a recommended pattern: have the model produce an approach, confirm the direction, then let it implement. The pattern trades a few dialogue rounds for a checkpoint that exists before any code does.
- The same guidance recommends persisting long-lived instructions into AGENTS.md — workflow preferences qualify as standing conventions that outlive any single session.
- Codex executes as a loop: the official agent-loop breakdown shows the model calling tools, observing results, and deciding the next step, iteration by iteration.
Concepts CONCEPTS
Not everything said in a community thread is a fact — each concept carries its nature label. Read the label first.
Before any code gets written, the agent outputs its implementation plan — which files change, the approach, the order — and a human approves it. A supported move in the official best practices, and cheap insurance: the plan is where a wrong direction costs the least to reject.
A personal take from a high-scoring HN experience post: agents broadly lack forward planning and carry blind spots around design, defaulting to just starting to write. It caught on because it matches what people keep seeing, not because anyone measured it — an opinion, not an official finding.
The community label for long tasks wandering away from what was originally agreed. Causes and fixes (segmented sign-off, small commits) come mostly from personal experience; systematic data is still missing.
Takeaways TAKEAWAYS
Why does the default behavior look like "just start writing"? Every step of the agent loop advances the task — the model calls a tool, observes the result, moves to the next step, and nothing in that loop hits the brakes for a human. The HN post frames this as agents lacking forward planning; that's an opinion rather than an official conclusion, but the scene it describes is one most people recognize: you ask for a plan, you receive an entire implementation. The loop is doing exactly what it was built to do — the missing brake is a workflow decision, not something you can wait out.
Locking the fix in takes two layers. The explicit layer is your opening line: "Give me the change plan and file list first; wait for my confirmation before writing any code." The durable layer is AGENTS.md, where the preference survives across sessions — official guidance already tells you to persist long-lived instructions there, and workflow preferences have no exemption. One sentence of setup buys you a gate you never have to remember again.
Tiered sign-off beats a blanket rule. For small tasks — a one-line copy change, an extra test — the confirmation step is pure overhead. For changes touching public interfaces, data structures, or several files at once, an upfront plan saves far more rework than the few dialogue rounds it costs. Where exactly the threshold sits differs per team; write it down and stop relitigating it, so the confirmation step doesn't curdle into a ritual nobody questions in either direction.
There's also a quota angle: OpenAI estimates usage per five-hour period, and repeated wrong turns consume allowance. A wrong turn costs the fix, re-brief, re-read and review. Planning first is both a quality habit and an allowance habit.
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