Loop/Prompt Library / Planning & second-opinion review
🔁 Make the plan buildable
Fills gaps in a new project's planning docs until two reviewers would build the same thing from them.
Use it when: You are about to start a new project and the docs still leave big questions open.
🛑 Stops when: Two independent reviewers describe the same build from the docs.
Copy this loop
Get [project] ready to build. Make sure the docs cover requirements, technical design, tasks with acceptance criteria, and a testing plan. Each round, fix the biggest gap or contradiction that could make two good engineers build different things. Write down assumptions and ask me before any big product choice. Then have two independent reviewers each describe the parts, data, dependencies, and 'done'. Repeat for at most [5] rounds. Stop when they agree.
Review every change the agent makes before you keep it. Set a budget or round limit — the prompt includes one.
Idea from Forward Future's Loop Library · by Brad Shannon (@bradshannon). Prompt rewritten in plain English by FixKit AI.
More loops like this
Turn an idea into a clear plan
Interviews you about a rough idea, then writes two files: what to build, and how the AI should build and check it.
Spec review rounds
Writes a spec for one ticket, has a tough reviewer check it against a rubric, and keeps fixing until it is approved.
Devil's advocate review
Has one AI argue your design is wrong, logs every objection, and makes the builder fix or justify each one with proof.
Two AIs must agree
Takes turns having AIs from two different companies review your work until both approve the exact same version.
Builder + tough reviewer (Claude and Codex)
Claude builds and opens a pull request, Codex reviews it harshly, Claude fixes, and they repeat until it passes.
Done means proven
Writes down every requirement and the proof needed before starting, so half-done work is never reported as done.