CLAUDE.md: Update status to Phase 6 in progress, add new pitfalls
and key files discovered during verification.
PLAN.md: Mark Steps 1, 2, and 2b complete with results (50/50 CLSIDs,
13/13 DAT tests). Add DecalDat functional test as Step 2b.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Claude Code auto-loads this file at session start, giving full project
context so new sessions can pick up where we left off.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>