docs: plan — deterministic forward state (sub-project A), 9 bite-sized tasks
Recompute-from-anchor implementation plan: forward_anchor table + repo (T1),
declared definition + hash (T2), append-only forward_record + book-state (T3),
pure recompute/derive_nav (T4), the anchor-lifecycle engine (T5), wire
_run_paper_tracker (T6), PIT Yahoo snapshots (T7), one-time migration (T8),
retire the state_reader JSON path (T9). TDD, WAIT-safe, idempotent, per-task commits.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
4a50c88ea5