Problem statement built on the four drift patterns from the Session-1
field test, six numeric acceptance criteria, non-goals (no history
rewrite, no push, no component rollout, no forge-state destruction),
announcement paragraph. Gates 2-5 deliberately not pre-filled, per
WORKFLOW.md. Frontmatter validates against neckbeard v0.1.1 schema
with 0 errors for this file.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
