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Write the plan first, then let AI code it

โ€œMy AI coder goes off in the wrong direction on bigger features.โ€

A short written spec and an ordered task list keep agents on track. You review the plan, then let it build one task at a time.

Fix it yourself in 3 steps

  1. Talk the feature through with an AI and have it write a one-page spec: goal, users, must-haves, out of scope.
  2. Ask it to turn the spec into ordered small tasks with 'done when' for each.
  3. Hand tasks to your coding agent one at a time and check each against the spec.

Copy this prompt

Interview me with up to 8 questions about this feature: [idea]. Then write a one-page spec (goal, users, must-haves, out of scope, open questions) and an ordered task list where each task has 'done when'. Stop after the spec and list โ€” don't write code.

Fill in the [brackets]. Each prompt says when the AI should stop, so it doesn't wander off.

Agents people used for this: ChatGPT, Devin, Claude Code, Codex.

Inspired by real examples collected at agentusecases.ai.

๐Ÿ“š 6 real stories of people doing this with AI agents

Collected at AgentUseCases.ai.

Tools for this

#1 ยท Our pick

Claude Code

Best for: Serious work on real repos

Anthropic's agent for your terminal, IDE and desktop. Reads the whole repo, runs commands and tests, and handles large multi-file changes well.

Visit Claude Code โ†—
#2

OpenAI Codex

Best for: Delegating tasks as PRs

OpenAI's coding agent, in the CLI and in the cloud. Good at handing off well-scoped tasks that come back as pull requests.

Visit OpenAI Codex โ†—
#3

ChatGPT

Best for: Widest feature set

OpenAI's assistant with the broadest feature set: voice, images, search and a large app ecosystem.

Visit ChatGPT โ†—