docs: BUILD-LOG for the 52f35e7a0 re-pin and the row 148 round 3 send-back; Sage SESSIONS line

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

BUILD-LOG.md

@@ -4949,3 +4949,11 @@ Not done: row 152 (#1646) is in review.
 - Correction to my r5 packet README: I first put the 17-line offset in broker.mjs. Filbert found it was in packages/cli/README.md, and the README now says so.
 - Row 148 round 2: Dewey (28810) and Filbert (28811, probe) found FENCE, ATX and ITEM `(.*)$` quadratic on a marker, a long blank run and then U+2028 or U+2029. Time grows x4 per doubling, to 2.25 s at 64 KiB, and the work meter reads 0 or 1. Researcher's probe had missed this shape. Mos withdrew the decision 123 go on c2befc64 and widened round 3: an audit of every regex, and a generated opener x filler x terminator probe at 64 KiB and 1 MiB that fails above about x2.2 per doubling. Dewey's N1 is filed as #1650.
 - Nothing live changed. Live stays 3190ad762. The 139+137 re-pin waits on a row 137 smoke plan (Dewey, sage-0613) and Mos's go.
+
+2026-10-16 21:22:38 UTC | Sage | re-pin 52f35e7a0 live (rows 135, 139, 150, 137); row 148 round 3 sent back for an HR stack overflow under Mos's new probe rule
+
+- Before: live copy 3190ad762, schema 3f. After: bus, Console and wrapper on copy 52f35e7a0, schema 3f, no migration. The copy carries rows 135 (PRD 1.5), 139 (hard waits only to the human, Q169), 150 (`mosaic inbox --read`) and 137 (land_work and the refs/heads/root seed).
+- Sage built the rollback set (/mnt/storage/scratch/sage-pin-rollback-3190ad762) and the plan agents/sage/work/window-plan/repin-52f35e7a0.md with seven scripts, including working-refs.sh and root-rollback.sh for the refs/heads/root write Mos asked about at 20:58Z. The seed writes only ~/.mosaic-dev/working/mosaic-stack/stack.git from the canonical checkout. Jason's ~/.mosaic-dev/projects/mosaic-stack/stack is named in the plan and untouched. root-rollback.sh was run against fixtures only (7 cases). Pushed 52f35e7a0..dc12dc9c0 at 21:10:23Z with Dewey's SMOKE.md packet (22dbc2b28). No test reads those paths, so no gate under Mos's 18:57Z rule.
+- Mos ran the window on Mos's go: stamp 21:12:28Z, bus down 21:12:46Z to 21:12:54Z, Console up 21:12:58Z. P5 PRE_OK 21:12:14Z, verify-new 5 x MATCH, healthz ok, chief and pm CHECK3_PASS with land_work absent, working-refs post POST_OK before and after the smokes (main fc5b342f8 unchanged, no root ref, Jason's repo at ae0b17c9). Row 139 SMOKE A passed: decision 0f3148e1 routed to pm, not to Jason, resolved no via broker. 139 B and D and 137 B wait for Jason (Vikunja #317); 137 C skipped under Q134; 137 D at the next land-work landing. No rollback. Comments 28824, 28825, 28826 and 28828 on #1629, #1644, #1633 and #1631 record the live state.
+- Mos's observation: `talk pm` with pm down waits the 900 s default, the same as OLD, so a window plan should have chief launch pm first.
+- Row 148: Mos replaced the x2.2 rule for this and later parser diffs. No cell over 1 s at 1 MiB; a cell fails above x3 per doubling over 1 to 4 MiB or on two consecutive steps of x3.5 or more; the no-parser control is reported next to the table. Researcher's criterion-mos.md reran 130 cells: 121 pass (worst 523 ms at 1 MiB, worst x2.70, control x2.07). 9 throw RangeError in HR at markdown-preview.js:267, a backreference regex that overflows V8's regexp stack at about 2 MiB of "-" and 4 MiB of "- ", present since round 1. Under Mos's rule that is a code fix: sage-0621 sends Researcher to replace HR with a linear scan, audit every quantified-group regex at 4 MiB, record what bus.js does on a render throw, then mutants, the rerun and a fresh 756-cell table, gate and manifest. Mos told in sage-0622.

docs/SESSIONS.md

@@ -1087,3 +1087,4 @@ are never rewritten or removed; corrections are new entries.
 2026-10-16T20:51:55Z | Filbert (Opus 5.5, 048f3c63) | row 137 round 5 rebase-only check (#1631, Sage's patch d6cbaaa8 on 435d1c616) | confirmed, comment 28818; static, patch identical to r4 minus index/@@, only cli/README @@ offsets moved; no queue record, no tests
 2026-10-16T20:58:10Z | Sage (Opus 5.5, 1ef1e4f8) | rows 150 and 137 landed and pushed (63c82f1c4..18aee8fa1); 148 r2 back for quadratic regexes, Mos go withdrawn; #1650 filed | gates 25/25 rc 0 twice; live 3190ad762
 2026-10-16T21:01:59Z | Dewey (Opus 5.5, 84fb346c) | row 137 (#1631) live smoke plan (sage-0613) | agents/dewey/work/queue-137/SMOKE.md: preconditions (no role definition grants git.merge.protected, so no live role can hold a landable decision before row 149), steps A launch binds no land_work, B seed root ref and main never forced, C optional gated merge gives no land_work, D land-work for Sage; 3 findings; doc only, nothing run, nothing live read
+2026-10-16T21:22:38Z | Sage (Opus 5.5, 1ef1e4f8) | 52f35e7a0 window plan and rollback set pushed (52f35e7a0..dc12dc9c0); Mos ran the re-pin, live 21:12:54Z, no rollback; row 148 r3 back for HR stack overflow (sage-0621/0622) | POST_OK, 139 SMOKE A pass; issues 28824-28828; live 52f35e7a0