Loop/Prompt Library / Planning & second-opinion review
🔁 Two AIs must agree
Takes turns having AIs from two different companies review your work until both approve the exact same version.
Use it when: Something important would benefit from two truly different opinions.
🛑 Stops when: Both AIs approve the same unchanged version, or the round limit is reached.
Copy this loop
Review [plan, doc, or code change] against [quality bar]. Use two AI models from different companies. Reviewer A goes first. Check each finding is real, apply only needed fixes, then hand the new version to reviewer B. Keep alternating. Succeed only when both approve the same version with no edits in between. Stop at [6] rounds, if they keep flip-flopping, or if a reviewer is unavailable. Give me the final version and a round log.
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 Donn Felker (@donnfelker). 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.
Make the plan buildable
Fills gaps in a new project's planning docs until two reviewers would build the same thing from them.
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.
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.