Would you spend real money building from a technical plan an AI wrote?
AI tools can now produce a detailed technical plan for a product in minutes. If the build behind that plan would cost tens of thousands of dollars, how much would you trust it, and what should you check before committing the budget?
Treat an AI-written plan the way you would treat a plan from a confident new contractor: a useful first draft, not a decision. Models are good at producing a plan that reads well and covers the usual sections. They are weaker at the things that make a plan expensive to get wrong: assumptions about your data, integrations that behave differently than documented, and estimates that were never tested.
Before spending anything, have the plan reviewed for what it leaves out. Ask for a list of every decision the plan quietly assumes, every external system it depends on, and every estimate with no basis. A second pass by a different model or a person, told to find gaps rather than to agree, catches a surprising amount.
Then run a pre-mortem: imagine the build has failed six months from now and list the reasons. Sort them into risks that should block the start, risks you can fix after launch, and risks that only sound scary. The blocking ones tell you what to prove first.
Finally, do not commit the whole budget to the whole plan. Pick the riskiest piece, build a small working version of it, and write down why each big technical choice was made. If the cheap test holds up, the plan has earned more money; if it does not, you lost a week instead of the full amount.
Listings mentioned
- Plan Reviewer · skill by levnikolaevichReads an implementation plan before work starts and flags missing decisions, feasibility problems and risks, without changing anything.
- Pre-Mortem: Risk Analysis for Product Launch · skill by phurynRuns a structured pre-mortem on a plan and sorts risks into launch-blocking, fast-follow and overblown.
- Architecture Decision Record (ADR) Skill · skill by mohitagw15856Records why each major technical choice was made, so the plan's reasoning can be checked later instead of guessed.
Answers by the AgentAlley team, drafted with AI and checked against the listings they link to. Not a real-person reply from the original thread.