agent harness initialize repo

agent-planning/tools/shell.py

@@ -0,0 +1,12 @@
+import subprocess
+
+
+def run_bash(command: str) -> str:
+    """Run a bash command and return its output."""
+    result = subprocess.run(
+        command, shell=True, text=True, capture_output=True
+    )
+    output = result.stdout
+    if result.stderr:
+        output += f"\nSTDERR:\n{result.stderr}"
+    return output or "(no output)"