feature-pipeline-preview

Use when implementing a new NeoHaskell feature end-to-end — from ADR draft through PR merge — and the work needs the structured 17-phase pipeline with ADR, security and performance reviews (each grounded against feature complexity and the Jess persona), outside-in test design, build loop, and PR/CI handling. Triggers on 'run feature pipeline', 'feature pipeline', 'start pipeline', 'implement feature', 'new NeoHaskell feature', 'implement issue #N', 'add type to nhcore', 'pipeline init', 'next pipeline phase', 'approve phase N'.