fix(app-exit): send BEFORE_EXIT before tearing down trace; add [app-exit-diag] logs in app/app-index/app-prompt

Author: johnlindquist

src/run/app-index.ts

@@ -42,7 +42,12 @@ process.title = `Kit Idle - Main Script`
 configEnv()
 
 process.once("beforeExit", () => {
-  send(Channel.BEFORE_EXIT)
+  try {
+    console.warn('[app-exit-diag] app-index BEFORE_EXIT sending')
+    send(Channel.BEFORE_EXIT)
+  } catch (e) {
+    console.warn('[app-exit-diag] app-index send BEFORE_EXIT failed:', (e as any)?.message || e)
+  }
 })
 
 log(

src/run/app-prompt.ts

@@ -128,11 +128,22 @@ configEnv()
 process.title = `Kit - ${path.basename(script)}`
 
 process.once('beforeExit', () => {
-  if (global?.trace?.flush) {
-    global.trace.flush()
-    global.trace = null
+  // Emit BEFORE_EXIT before tearing down tracing to avoid null deref
+  try {
+    console.warn('[app-exit-diag] app-prompt BEFORE_EXIT sending')
+    send(Channel.BEFORE_EXIT)
+  } catch (e) {
+    console.warn('[app-exit-diag] send BEFORE_EXIT failed:', (e as any)?.message || e)
+  }
+  try {
+    if (global?.trace?.flush) {
+      global.trace.flush()
+    }
+  } catch (e) {
+    console.warn('[app-exit-diag] trace.flush failed:', (e as any)?.message || e)
+  } finally {
+    try { (global as any).trace = null } catch {}
   }
-  send(Channel.BEFORE_EXIT)
 })
 
 performance.mark('run')

src/run/app.ts

@@ -24,7 +24,12 @@ let script = await arg("Path to script:")
 process.title = path.basename(script)
 
 process.once("beforeExit", () => {
-  send(Channel.BEFORE_EXIT)
+  try {
+    console.warn('[app-exit-diag] app BEFORE_EXIT sending')
+    send(Channel.BEFORE_EXIT)
+  } catch (e) {
+    console.warn('[app-exit-diag] app send BEFORE_EXIT failed:', (e as any)?.message || e)
+  }
 })
 
 await run(script)