kin: auto-commit after pipeline

cli/main.py

@@ -650,6 +650,11 @@ def run_task(ctx, task_id, dry_run, allow_write):
         raise SystemExit(1)
 
     pipeline_steps = output["pipeline"]
+    if not isinstance(pipeline_steps, list) or not pipeline_steps:
+        click.echo(
+            f"PM returned empty or invalid pipeline: {pipeline_steps!r}", err=True
+        )
+        raise SystemExit(1)
     analysis = output.get("analysis", "")
 
     # Save completion_mode from PM output to task (only if neither task nor project has explicit mode)