"Plan mode is dead," from someone who built a planning-first coding app.

Ayman Nadeem's September 24 post (368 points, 332 comments) says building Nuanced taught him that "planning != plan": users didn't value the spec artifact, AI-written specs are tedious to read, and demanding a finished plan before building broke how people actually interleave thinking and doing. He argues for an understand-act-inspect-clarify-adjust loop. The open problem he names is keeping humans able to understand a system as agent count goes from five to hundreds. The comment thread is split, which is the right state for this question.