docs: master plan post-substrate-audit (7 phases + EoD snapshot) (#262)
End-of-day handoff doc. Carries strategic plan + active-PR snapshot
across the session boundary so morning-self picks up cleanly.
Contents:
- Three guiding rules (fully-wired definition, thesis check,
L10 is load-bearing)
- EoD snapshot: PRs in flight (#261 B, gate unopened), 5 W-* closures
today, 49-test quarantine registry with cluster breakdown, AM
resumption order
- 7-phase plan in dependency order:
1. Hygiene & honesty (today)
2. Operator decisions (5 quick calls)
3. Test debt paydown (5 clusters, easiest→hardest)
4. L10 runtime model (THE load-bearing decision)
5. L10 cascade (6 items unlock once L10 commits)
6. 'Decodes, not generates' milestone (Phase 5 enables this)
7. Validation & projection (patents, Rust parity, benchmarks)
- Tonight's lessons (4 items including pytest-xdist surprises and
the lane subprocess timeout calibration)
- Cross-refs to ratchet, registry, scopes, and memory entries
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