core: make installdeps non blocking

packages/opencode/src/index.ts

@@ -28,6 +28,8 @@ import { WebCommand } from "./cli/cmd/web"
 import { PrCommand } from "./cli/cmd/pr"
 import { SessionCommand } from "./cli/cmd/session"
 
+const cancel = new AbortController()
+
 process.on("unhandledRejection", (e) => {
   Log.Default.error("rejection", {
     e: e instanceof Error ? e.message : e,
@@ -150,10 +152,6 @@ try {
     console.error(e)
   }
   process.exitCode = 1
-} finally {
-  // Some subprocesses don't react properly to SIGTERM and similar signals.
-  // Most notably, some docker-container-based MCP servers don't handle such signals unless
-  // run using `docker run --init`.
-  // Explicitly exit to avoid any hanging subprocesses.
-  process.exit()
 }
+
+cancel.abort()