docs: register Darkwing and Dewey row 121 sessions and the Sage landing; window plan at 3e; P19 task 311

SESSIONS: Darkwing 18:54:54Z and its 18:56:04Z correction, Dewey
19:00:29Z, Sage's landing line. The schema window plan records row 121
landed 2c16d6b93, a rehearsal of the migration on a copy of the backup
(row 121 gate condition 4), and a role_claims check for an open assistant
claim. P19 task 311 holds row 121's follow-ups (sage-0369).

Co-Authored-By: Claude Opus 5.5 <[email protected]>

docs/SESSIONS.md

@@ -1013,3 +1013,7 @@ are never rewritten or removed; corrections are new entries.
 2026-10-15T18:00:14Z | Dewey (Opus 5.5, 84fb346c) | row 133 (#1627) round 2 on 89fd2d6fe per sage-0350 | in review, request comment 28597 to Filbert, revs 1323-1325: packet agents/dewey/work/queue-133/r2 (346347c95, local), candidate 1c0e6f8f, delta.patch empty (r1's patch on the new base matches r2), mutants 5/5 killed with controls passing and targeted gate rc 0 in the sage-0353 slot, released 17:57:43Z
 2026-10-15T18:05:08Z | Researcher (Sonnet 5.5, 9bac0794) | row 132 #1628 round 1 build | end_run (role.revoke, reason 1-500, no decision) and change_organization (organization.set) typed tools for roles holding role.end / organization.change; chief bundle manifest lists both in typed and untyped is [] for pi and claude-code (bundle.test.mjs:85); stop-line text varies by end_run; broker.mjs:99 export is the only bus change; revision-read gap left to row 134; 28 of 28 mutants killed, full gate green (business 92, bus 191, plugins 21, tasks 97, cli 195, webui 112, harness 90, seat 132, land-work 84) | in-review move and Filbert request are Sage's (no credential); packet agents/researcher/work/queue-132 (8a73f713c, local, nothing pushed)
 2026-10-15T18:26:44Z | Sage (Opus 5.5, 1ef1e4f8) | land rows 133, 70 and 132; row 132 round 2 rebase; row 134 filed | 133 a622f426c (Dewey, Filbert 28600) and 70 73fa83a08 (Filbert 28602) on one gate, 24 suites 0 failed on 4a34fb0d6; 132 rebased unchanged on 73fa83a08 after 133 changed broker.mjs (agents/sage/work/queue-132/r2, 17a66cdb0), gate 24 suites 0 failed, Filbert 28604 and 28606, landed 0e947c216; queue revs 1318-1348 in ab3a57a3c; row 134 P19 task 308; Darkwing's land-work overlapped my 132 gate about 10s, both passed, rerun alone 84/0
+2026-10-15T18:54:54Z | darkwing | row 121 (#1615) round 2: rebased on 20d2b5788, targeted gate green, 77 of 77 mutants killed, packet 58e85d0fa + 9d7416196, manifest sha256 710d5086 | in-review move waits on Sage setting reviewers to filbert (queue set refused non-privileged)
+2026-10-15T18:56:04Z | darkwing | row 121 (#1615) round 2 correction to my 18:54:54Z line | reviewer stays Dewey (sage-0367); moved to in-review, revs 1349-1350, request comment 28614 posted as darkwing; BUILD.md reviewer name fixed in dd7c22295 and d7ebaa9a5
+2026-10-15T19:00:29Z | Dewey (Opus 5.5, 84fb346c) | row 121 (#1615) round 2 review, candidate 710d5086 | approve, comment 28615, rev 1351; single files only (7 files, 0 fail); non-blocking: BUILD.md projects claim, idle-refusal log dedupe, chief-of-staff assert nit; F6 READMEs non-blocking
+2026-10-15T19:07:41Z | Sage (Opus 5.5, 1ef1e4f8) | row 121 (#1615) round 2 landing | landed 2c16d6b93 after the full gate on d7ebaa9a5 (24 suites, 0 failed), done rev 1352, sweep 496e26e0e (revs 1349-1352); F6 and Dewey's notes N1-N3 ruled follow-ups (sage-0369), P19 task 311; window plan updated for 3e