Build Agent Office inside codeSplitter (tracker, replaces #2952) #3423

The open tracker for building the Druids-skinned Agent Office inside codeSplitter. It replaces #2952, which was closed on 2026-10-31 by the docs fix #2967 (that PR made the docs say the office is not built; it did not build it). #1384 and #1412 were closed earlier without the work.

State today: nothing office-related is in apps/codesplitter/src. The office only watches codeSplitter (mark, news dot and dispatch hint, apps/agent-office/DOGFOOD.md); workers still run in local worktrees and merge through GitHub.

Plan: apps/agent-office/MOVE.md (preview, what moves, cut-over, rollback). Stage and runbook: apps/agent-office/PREVIEW.md.

Not built

• Office Durable Object: queue, desks, roster
• 3D client served from the Worker
• PTY over WebSocket
• Container lifetime
• Per-floor cost cap
• Auth mapping

Open questions carried from #2952

• Owner: build it, or drop the claim from the docs? Build it, plan round first (2026-11-09). Priced build order: MOVE.md "Build order (priced)", Agent Office in codeSplitter: priced build order (Part of #3423) #4052.
• Does office-workers hire from a shell skip the dispatch hint? No, not since Office: queue guard in the server hire path, not only the page #3119 (PR Office: an agent's hire or queue on busy files is refused, held or sent anyway (#3119) #3426): the hire and queue handlers run the overlap check (apps/agent-office/scripts/floorguard.ts:28-30, :139-142 -> live/overlap.ts:99 hireClash), a 409 unless --anyway/--hold. It reads gh and git, not codeSplitter's dispatch-hint endpoint.
• The 2026-10-14 "codeSplitter to its own home" idea: still wanted? No, not for now: codeSplitter stays in this repo (owner, 2026-11-09).

AGENTS.md, MOVE.md, PREVIEW.md, the codeSplitter README and notes/WORKER_COLLISIONS.md point here (#3024).