The most expensive bug in AI-assisted building is shipping the wrong thing, well. A drop-in CLAUDE.md / AGENTS.md for PM + eng teams using Claude Code, Cursor, or Codex: 7 principles for problem framing, scope, tradeoffs, and outcome measurement. Built on @karpathy's observations.
2 files for Claude Code, Codex and OpenCode: product-mode CLAUDE.md, product-mode AGENTS.md — 4,272 tokens loaded in every session.
CLAUDE.md A 2,136 tok AGENTS.md A 2,136 tok These files are sohaibt/product-mode's own configuration — they tell Claude Code, Codex and OpenCode how to work on this repository, so they are not mods to install elsewhere. Copy one as a starting point and replace the parts that are about this project.