Plan Agent targets before launching Genies

Teach the Agent runtime and UI to resolve target packages from installed apps and start one child Genie session per selected package, with an optional package override for debugging.

Co-authored-by: Codex <noreply@openai.com>

android/app/src/main/java/com/openai/codexd/MainActivity.kt

@@ -171,12 +171,8 @@ class MainActivity : Activity() {
     }
 
     fun startDirectAgentSession(@Suppress("UNUSED_PARAMETER") view: View) {
-        val targetPackage = findViewById<EditText>(R.id.agent_target_package).text.toString().trim()
+        val targetPackageOverride = findViewById<EditText>(R.id.agent_target_package).text.toString().trim()
         val prompt = findViewById<EditText>(R.id.agent_prompt).text.toString().trim()
-        if (targetPackage.isEmpty()) {
-            showToast("Enter a target package")
-            return
-        }
         if (prompt.isEmpty()) {
             showToast("Enter a prompt")
             return
@@ -184,9 +180,13 @@ class MainActivity : Activity() {
         ensureCodexdRunningForAgent()
         thread {
             val result = runCatching {
+                val plan = AgentTaskPlanner.plan(
+                    context = this,
+                    userObjective = prompt,
+                    targetPackageOverride = targetPackageOverride.ifBlank { null },
+                )
                 agentSessionController.startDirectSession(
-                    targetPackage = targetPackage,
-                    prompt = prompt,
+                    plan = plan,
                     allowDetachedMode = true,
                 )
             }
@@ -195,8 +195,9 @@ class MainActivity : Activity() {
                 refreshAgentSessions()
             }
             result.onSuccess { sessionStart ->
-                focusedFrameworkSessionId = sessionStart.childSessionId
-                showToast("Started ${sessionStart.childSessionId} via ${sessionStart.geniePackage}")
+                focusedFrameworkSessionId = sessionStart.childSessionIds.firstOrNull()
+                val targetSummary = sessionStart.plannedTargets.joinToString(", ")
+                showToast("Started ${sessionStart.childSessionIds.size} Genie session(s) for $targetSummary via ${sessionStart.geniePackage}")
                 refreshAgentSessions()
             }
         }