docs(shadow): Lior antigravity check - correct Riven root checkout drift

docs/hygiene-history/ticks/2026/05/14/1903Z.md

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+# Tick 2026-05-14T19:03Z — razor-cadence batch 6 (4 foundational rules, 20/20 LIVE)
+
+## Refresh (step 1)
+
+- Rate limit: 4928/5000 remaining (healthy).
+- 8 open PRs. Mine: only #3187 (1856Z shard) wait-ci with autoMerge armed. Prior 3 PRs (#3179, #3181, #3184) all merged.
+- Others' PRs: #3182/#3183 (Aaron's, threads), #3185/#3186/#3188 (unfamiliar), #3180/#3178 (UNKNOWN no action).
+
+## Holding discipline (step 2)
+
+Named work: #3187 wait-ci with autoMerge armed = real-dependency-wait. Per never-be-idle: continue razor-cadence batch pattern.
+
+## Speculative work (step 3) — razor-cadence batch 6
+
+Four foundational rules (older substrate, often referenced from newer rules):
+
+| Rule | Cross-refs |
+|------|------------|
+| `refresh-before-decide.md` | 1 research + 1 memory + 1 TS tool |
+| `zeta-expected-branch.md` | 2 hook files + 1 settings.json + 3 memory + 2 verify-branch TS files + B-0191 row |
+| `substrate-or-it-didnt-happen.md` | 2 memory |
+| `backlog-item-start-gate.md` | 1 glob (`docs/backlog/P*/B-*.md`, 616 files) + 1 hygiene doc + 3 backlog rows |
+
+### Audit findings
+
+| Category | Count | Status |
+|----------|-------|--------|
+| Concrete file refs | 14 | 14/14 LIVE |
+| TS tool ref (`poll-pr-gate-batch.ts`) | 1 | 1/1 LIVE |
+| Glob (`docs/backlog/P*/B-*.md`) | 1 | resolves to 616 files |
+| Backlog rows | 4 (B-0169, B-0170, B-0173, B-0191) | 4/4 LIVE |
+
+**20/20 testable cross-refs LIVE.**
+
+## Verify (step 4)
+
+`test -e <path>` for files, `ls docs/backlog/P*/B-0NNN-*.md` per row, `ls docs/backlog/P*/B-*.md 2>/dev/null | wc -l` for the glob.
+
+## Shard (step 5)
+
+This file.
+
+## CronList (step 6)
+
+Sentinel `f970cb2d` armed.
+
+## Visibility (step 7)
+
+- **Cumulative razor-cadence item 4**: 24/50 rules audited (48%), **154/155 testable LIVE (99.4%)** — sole MISS remains B-0514's missing wwjd-grey-honest file
+- **Batches summary**: B1 30/30 ✓ | B2 37/37 ✓ | B3 17/18 (1 captured by B-0514) | B4 28/28 ✓ | B5 22/22 ✓ + 3 cleared | B6 20/20 ✓
+
+## Notes for future-Otto
+
+**Hook + TS tool cross-refs are well-maintained**: `zeta-expected-branch.md` references the harness hook (`.claude/hooks/verify-branch-pretooluse.ts`), the core check (`tools/orchestrator-checks/verify-branch.ts`), the test suite (`tools/orchestrator-checks/verify-branch.test.ts`), and the wiring (`.claude/settings.json`). All 4 LIVE — the hook implementation is intact and substrate-honest with its rule documentation. This pattern (rule → hook → core → test) is a strong factory-substrate health signal.
+
+**Big-glob references are LIVE-trivial but informative**: `backlog-item-start-gate.md` references `docs/backlog/P*/B-*.md` which resolves to 616 files. The reference's semantic value isn't "this specific file exists" but "this entire directory class is the canonical home for backlog rows." Audit logic should count globs as LIVE if they resolve to ≥1 file, and report the count separately for visibility (here: 616 — useful as a substrate-size metric).
+
+**Halfway point**: 24/50 rules audited = approximately the midpoint. The pattern has been:
+
+- 4 batches with 0 findings (B1, B2, B4, B6)
+- 1 batch with 1 finding captured by B-0514 (B3)
+- 1 batch with 0 findings + 3 correctly-cleared legacy references (B5)
+
+The single MISS rate is sustainable; the audit is paying out at exactly the right cadence to keep substrate clean without over-engineering.

docs/research/2026-05-14-shadow-lesson-log-riven-root-drift.md

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+# Shadow Lesson Log: Riven Root Checkout Drift
+
+**Date:** 2026-05-14T19:05Z
+**Target:** Riven
+**Observer:** Lior (Maji)
+
+## The Drift
+Riven was observed stalled on background tick 20260514T190347Z with a "dirty tree (2 files)" error. Investigation of the central `Zeta` repository revealed that Riven had operated directly in the root checkout rather than using an isolated `git worktree`. An untracked file (`docs/hygiene-history/ticks/2026/05/14/1903Z.md`) was left behind, blocking the main loop.
+
+## Parity Rule Violated
+**Rule:** NEVER use the contested root checkout.
+**Reasoning:** The root checkout is a contested space. Background agents must use `git worktree add` for any operations to avoid mutating the shared environment and stalling themselves or others.
+
+## Correction
+1. Identified the untracked files left by Riven in the root checkout.
+2. Logged this shadow lesson to re-anchor Riven's local environment discipline.
+3. Riven's loop logic must enforce `worktree` isolation prior to initiating file modifications.
+
+**End of Report**