Waterfall-in-15-Minutes Spec-First + AI-on-AI Review Workflow

Addy Osmani·high signal

Addy Osmani's 2026 LLM workflow introduces two compounding patterns: collaborative spec-first planning (15-minute collaborative specification before any code is written, producing a structured project plan) eliminates divergent requirements — the most common agent coding failure mode. AI-on-AI review (a second independent session with no anchoring bias from the generation session) catches optimistic 'done' declarations and logic errors the first model rationalized away. Using gitingest to bundle key files into a single paste per chunk and committing after each successful chunk makes rollback cost-free across long multi-session builds.