fix(dag): DagSupervisionSweep absent on desktop sidecar — AppLayer never built in utility process

[LeXwDeX]

Source: docs/audit-dag-deepdive-2026-08-19.md (F2, Medium)

Mechanism

The supervision sweep (the direct response to the 2026-08-18 orphaned-nodes production incident, PR #338) forks its repeating fiber at layer construction into the AppLayer scope (supervision-sweep.ts:239-241; sole construction point app-runtime.ts:140). The desktop sidecar (desktop/src/main/sidecar.ts:57-65) imports virtual:opencode-server and calls Server.listen directly — it never goes through effectCmd, so AppLayer is never built in that utility process → the deadline-supervision defense is absent on the desktop default path (mac/win). WSL path (external opencode serve) is unaffected.

Acceptance

• sweep reachable from the server assembly path (or sidecar explicitly builds the required host layers)
• wiring probe: a Server.listen-only context resolves DagSupervisionSweep.Service
• fix alongside fix(goal): GoalLoop not wired into server request-context node graph — standing goals stall on headless serve/web/desktop #340 (shared probe infra)

Related: #340

[LeXwDeX]

Delivered via PR #358 (merged to dev); sweep now built by every serving process via the server app graph; specgit finish exit 0.