icomppower

Resurrect rebuilds old software from a short screen recording, without the builder ever seeing the original app, and proves the new version behaves the same. Problem: clinics and small businesses run on software whose vendor is gone. Nobody has the code or knows its rules. AI can copy how an app looks; nobody checks how it behaves. How it works: 1. Record: 6 seconds of someone checking a claim for errors in a 2018 open-source medical billing app (OpenEMR 5.0.2, synthetic data). 2. Observer (Claude) writes a behavior-only spec: 32 rules, 24 seen happen, 8 guessed. 3. The wall: a linter lets only the rule list cross. No screenshots, code or text from the old app. Every handoff is fingerprinted (sha256) in wall.log. 4. Builder: a separate sealed Claude Code run (claude -p, Read/Write/Edit only, no access to the