feat(aircoding): AirCoding V2 baseline — deterministic multi-agent architecture

Forked from OpenCode v1.17.4 with multi-agent system:
- 5 agents: aircoding, scheduler, worker, architect, reviewer
- Deterministic DAG scheduling engine (coordinator_tick)
- Tool whitelists as hard enforcement
- AirCoding validation plugin
- V1 requirements: C4 docs, ADR, AGENTS.md, debug-log.md
- Design documents in docs/

packages/opencode/src/bus/global.ts

@@ -0,0 +1,22 @@
+import { EventEmitter } from "events"
+import { Identifier } from "@/id/id"
+
+export type GlobalEvent = {
+  directory?: string
+  project?: string
+  workspace?: string
+  payload: any
+}
+
+class GlobalBusEmitter extends EventEmitter<{
+  event: [GlobalEvent]
+}> {
+  override emit(eventName: "event", event: GlobalEvent): boolean {
+    if (event.payload && typeof event.payload === "object" && !("id" in event.payload)) {
+      event.payload.id = event.payload.syncEvent?.id ?? Identifier.create("evt", "ascending")
+    }
+    return super.emit(eventName, event)
+  }
+}
+
+export const GlobalBus = new GlobalBusEmitter()