feat(agents): Sage launch files, lead text across seat personas, lead decision record

- agents/sage/ launch files committed after Dewey's review (R1 revise, R2
  approve). The launcher test now covers sage with its zai/glm-5.3 high pin.
  The README states the lead role and its limits, and the seat reads but
  never writes the old DYOR records under ~/.mosaic.
- N6 (Dewey authored, Sage reviewed against pins): seat personas and the
  Rocko launcher name Sage as project lead and Darkwing as a collaborating
  engineering seat, per Jason's 2026-09-26 ruling.
- docs/plans/2026-09-26_lead-decisions.md: the push, no merge into next and
  its conditions, the board restart, queue-as-data rulings, Gate F waiting
  on a T3 source, and what stays with Jason.

Launcher tests 6/6 and 1/1, eight suites green. Not pushed.

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

BUILD-LOG.md

@@ -2899,3 +2899,25 @@ text", which looked like the reply. Age showed only the ISO time. The
 candidate adds a pending notice that appears after a send and clears once the
 new final answer arrives, and Age shows a relative time ("1m ago") beside the
 ISO time. Source: `agents/dewey/work/return-flow-age/NOTES.md`.
+
+## 2026-09-26: push, board restart, Sage launch files and lead text (Sage)
+
+Before: four local commits unpushed; the control board ran a 09-14 build
+without #1512; `agents/sage/` was untracked with no review receipt and a
+DYOR-only README; every seat persona named Darkwing as lead. After: Jason
+asked for the lead's decision (20:02Z), so origin/refactor was fast-forwarded
+43d7574d → 42c08d52 with the jarvis identity; `next` was not merged (reasons
+and merge conditions in `docs/plans/2026-09-26_lead-decisions.md`). The board
+restarted as PID 3977979 with identical sessions, counts and seen state, and
+now reports `relaunchedAt`. `agents/sage/` is committed after Dewey's review
+(R1 revise, R2 approve): the launcher test covers sage with its zai/glm-5.3
+high pin, the README states the lead role, and the seat reads but never
+writes the old DYOR records under `~/.mosaic`. Dewey authored the N6 text
+change (11 persona/launcher files) naming Sage as lead and Darkwing as a
+collaborating seat; Sage reviewed it against Dewey's pins.
+
+Evidence: `scripts/test-darkwing-launch.mjs` 6/6, `scripts/test-rocko-launch.mjs`
+passes, `agents/sage/launch.sh --check` passes, eight suites green. Records:
+`agents/dewey/work/sage-launch-review-2026-09-26.md`,
+`agents/dewey/work/n6-lead-text/`. Running seats keep their injected
+snapshots until they relaunch. Not pushed.