docs(lane1): re-verify Friday retention gate fails closed on stale empty workspace after the closed twin

[nish3451]

Re-verifies that the [unreviewed-by-opus] blocker on the Friday retention gate item is no longer a real defect: the 2026-08-17 fix (commit 2cf7e8f, PR #191) is intact on origin/main, the regression suite exits 0, and the production gate against the live main worktree fails with three independent signals (canonical workspace staleness, service-decisions aggregate-parity gap, runs/service-engine aggregate-parity gap) instead of green-passing.

Adds:

• .lane/reports/lane1-retention-stale-empty-empty-workspace-reverify-20260820.md — full contract-by-contract breakdown with the live production gate output and references back to the original 2026-08-17 lane report.

Greptile Summary

This documentation-only PR records a fresh verification that the Friday retention gate fails closed for stale or empty canonical workspaces after the closed-twin fix.

• Captures the hermetic regression-suite result and live production-gate output.
• Describes freshness, canonical-workspace resolution, missing-state-root handling, and aggregate-parity checks.
• Links the verification to the original fix and identifies the unchanged scripts under test.

Confidence Score: 5/5

The documentation-only PR appears safe to merge.

No blocking failure remains.

Important Files Changed

Filename	Overview
.lane/reports/lane1-retention-stale-empty-empty-workspace-reverify-20260820.md	Adds the regression and production evidence used to re-verify the retention gate’s fail-closed behavior.

_{Reviews (2): Last reviewed commit: "Merge branch 'main' into lane1/retention..." | Re-trigger Greptile}

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• .lane/reports/lane1-retention-stale-empty-empty-workspace-reverify-20260820.md

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[greptile-apps]

Distinguish required state roots

This bullet classifies service-decisions and runs/service-engine as required canonical state roots, but only clients and prospects produce missing-root failures; the other directories are optional and become relevant to aggregate parity when active clients exist. The current wording misstates the legitimate no-client behavior covered by the suite.

Suggested change

	- Missing canonical state roots (`clients`, `prospects`,
	`service-decisions`, `runs/service-engine`) fail
	- Missing required canonical state roots (`clients`, `prospects`) fail

Prompt To Fix With AI

This is a comment left during a code review.
Path: .lane/reports/lane1-retention-stale-empty-empty-workspace-reverify-20260820.md
Line: 29-30

Comment:
**Distinguish required state roots**

This bullet classifies `service-decisions` and `runs/service-engine` as required canonical state roots, but only `clients` and `prospects` produce missing-root failures; the other directories are optional and become relevant to aggregate parity when active clients exist. The current wording misstates the legitimate no-client behavior covered by the suite.

```suggestion
- Missing required canonical state roots (`clients`, `prospects`) fail
```

---

For each issue above, determine whether it is valid and should be fixed. If so, fix it directly.

Note: If this suggestion doesn't match your team's coding style, reply to this and let me know. I'll remember it for next time!