diff --git a/.pql/pql-plan.json b/.pql/pql-plan.json
index 0e39e917..dfc998bc 100644
--- a/.pql/pql-plan.json
+++ b/.pql/pql-plan.json
@@ -1,5 +1,5 @@
 {
-  "exported_at": "2026-04-30T20:42:24Z",
+  "exported_at": "2026-05-01T07:24:10Z",
   "decisions": [
     {
       "id": "D-1",
diff --git a/lib/builtin/claude/src/claude_pane.dart b/lib/builtin/claude/src/claude_pane.dart
index c3fe870b..3bf7d8ae 100644
--- a/lib/builtin/claude/src/claude_pane.dart
+++ b/lib/builtin/claude/src/claude_pane.dart
@@ -52,12 +52,15 @@ class _ClaudePaneState extends State<ClaudePane> {
   String _statusLine = 'attaching…';
 
   @override
+  bool _spawned = false;
+
   void initState() {
     super.initState();
     _terminal = Terminal(maxLines: _maxLines);
     _terminal.onOutput = _onOutput;
     _terminal.onResize = _onResize;
-    WidgetsBinding.instance.addPostFrameCallback((_) => _spawnWhenReady());
+    // Don't spawn here — wait for the first onResize from TerminalView
+    // so the PTY gets real dimensions, not 80x24 defaults.
   }
 
   @override
@@ -201,6 +204,12 @@ class _ClaudePaneState extends State<ClaudePane> {
   }
 
   void _onResize(int cols, int rows, int _, int __) {
+    if (!_spawned) {
+      // First resize — TerminalView has real dimensions now.
+      _spawned = true;
+      _spawnWhenReady();
+      return;
+    }
     final id = _paneId;
     if (id == null) return;
     _ipc()?.request('pane.resize', args: {'id': id, 'cols': cols, 'rows': rows});