Add CodeNomad plugin bridge for opencode

packages/server/src/plugins/handlers.ts

@@ -0,0 +1,62 @@
+import type { EventBus } from "../events/bus"
+import type { WorkspaceManager } from "../workspaces/manager"
+import type { Logger } from "../logger"
+import type { PluginOutboundEvent } from "./channel"
+
+export interface PluginInboundEvent {
+  type: string
+  properties?: Record<string, unknown>
+}
+
+interface HandlerDeps {
+  workspaceManager: WorkspaceManager
+  eventBus: EventBus
+  logger: Logger
+}
+
+export function handlePluginEvent(workspaceId: string, event: PluginInboundEvent, deps: HandlerDeps) {
+  switch (event.type) {
+    case "codenomad.pong":
+      deps.logger.debug({ workspaceId, properties: event.properties }, "Plugin pong received")
+      return
+
+    case "opencode.session.idle": {
+      const workspace = deps.workspaceManager.get(workspaceId)
+      const title = workspace?.name || workspace?.path?.split(/[\\/]/).filter(Boolean).pop() || "CodeNomad"
+
+      const sessionId = readString(event.properties?.sessionID)
+      const message = sessionId ? `Session ${sessionId} is idle` : "Session is idle"
+
+      deps.eventBus.publish({
+        type: "instance.event",
+        instanceId: workspaceId,
+        event: {
+          type: "tui.toast.show",
+          properties: {
+            title,
+            message,
+            variant: "info",
+            duration: 8000,
+          },
+        },
+      })
+      return
+    }
+
+    default:
+      deps.logger.debug({ workspaceId, eventType: event.type }, "Unhandled plugin event")
+  }
+}
+
+export function buildPingEvent(): PluginOutboundEvent {
+  return {
+    type: "codenomad.ping",
+    properties: {
+      ts: Date.now(),
+    },
+  }
+}
+
+function readString(value: unknown): string | undefined {
+  return typeof value === "string" && value.trim() ? value : undefined
+}