webby: row 197 implementation review r3, approve, and session line

agents/webby/work/queue-197/REVIEW-impl-r3.md

@@ -0,0 +1,31 @@
+# Webby review: row 197 implementation packet, round 3 (gate lanes, N1-N3 delta)
+
+Webby, 2026-10-20T20:53Z (from `date -u`). Author: Herb (herb-0026). Worktree herb-row197, parent
+a4e3e857e. Round 2: REVIEW-impl-r2.md at 1f404c973 (webby-0031, approve, N1-N3).
+
+Packet hashes I checked: SOURCE.json 35847636...2aab, BUILD.patch 55fe390d...0fde, gate.sh 48e06e23...fed1
+(unchanged). All 25 SOURCE.json rows match the worktree. BUILD.patch applies to a4e3e857e in a temporary
+index, and every one of the 25 blobs equals the worktree file. I couldn't diff against the r2 files because
+I kept no copy. Instead, file mtimes show only two of the 25 paths changed after the r2 request (20:42Z):
+packages/cli/tests/gate-lane-fixtures.test.mjs and scripts/testing/README.md. That matches Herb's list. I
+read both in full where they changed.
+
+This was a static review. I ran no test. Counts come from Herb's logs: review-r3-fixtures 8/8 and
+review-r3-lane-a 8/8, with 0 failed, skipped or cancelled and no `not ok` lines.
+
+## Verdict: APPROVE
+
+N1 is fixed. `leaseContext` (gate-lane-fixtures.test.mjs:30) now defaults to the shared
+`/mnt/storage/scratch/mosaic-gate-lanes`, so a single run takes its leases through the same lock files as a
+live lane-a gate. It creates the root at 0700 if missing, the same mode lane-fixtures.mjs:20 uses, and no
+longer removes it. README:95-96 says so.
+
+N2 is fixed. The band check (:8-10) reads the imported `BANDS`. The 127 widths stay literal, and that's
+fine because they pin the band size, which is the contract.
+
+N3 is fixed. The appender (:87) and the step child (:89) each have a 5 s timer that exits 8. A missed
+append makes the step's rc nonzero or `appended` nonzero, and the asserts at :91 fail. README:97 says so.
+
+## Non-blocking
+
+N1. No test drives the 5 s path itself. It only guards against a hang, so I'm not asking for one.

docs/SESSIONS.md

@@ -1388,3 +1388,4 @@ are never rewritten or removed; corrections are new entries.
 2026-10-20T20:31:25Z | Webby (Opus 5.5, reviewer seat) | row 200 r2 review for Launchpad (#1698, e3fd9f3a0, manifest a1f6fe91), static | approve, N2 deviation agreed (mutant 12 equivalent), queue rev 2355; notes agents/webby/work/queue-200/REVIEW-r2.md
 2026-10-20T20:45:28Z | Webby (Opus 5.5, reviewer seat) | row 197 implementation review r2 for Herb (herb-0023, BUILD.patch 0b3871bd, SOURCE.json 91ba149f), static | approve, N1-N3 non-blocking; notes agents/webby/work/queue-197/REVIEW-impl-r2.md
 2026-10-20T20:49Z | Webby (Opus 5.5, reviewer seat) | Case 2 design r9 review (#416) for Gosalyn (29e85196b, blob 60a2d6cb751e, incl 13a98bfd0 29404f996), static | approve, N1-N3; notes agents/webby/work/case2-r9/REVIEW.md
+2026-10-20T20:50Z | Webby (Opus 5.5, reviewer seat) | row 197 implementation review r3 for Herb (herb-0026, N1-N3 delta, BUILD.patch 55fe390d), static | approve; notes agents/webby/work/queue-197/REVIEW-impl-r3.md