diff --git a/claude_code/wrapper/main.go b/claude_code/wrapper/main.go
index 8f52b4f..9bcb4f8 100644
--- a/claude_code/wrapper/main.go
+++ b/claude_code/wrapper/main.go
@@ -249,6 +249,10 @@ func cmdBuild(args []string) {
 		cmd = append(cmd, "--dangerously-skip-permissions")
 	}
 
+	// Disallow Claude Code's native scheduling tools — StrawPot manages
+	// scheduling through its own orchestrator (denden).
+	cmd = append(cmd, "--disallowedTools", "CronCreate,CronDelete,CronList")
+
 	// Single --add-dir pointing to the agent workspace.
 	// Claude Code discovers .claude/skills/ within it natively.
 	cmd = append(cmd, "--add-dir", ba.AgentWorkspaceDir)
diff --git a/claude_code/wrapper/main_test.go b/claude_code/wrapper/main_test.go
index 2db67b9..e5e4593 100644
--- a/claude_code/wrapper/main_test.go
+++ b/claude_code/wrapper/main_test.go
@@ -364,6 +364,25 @@ func TestCmdBuild_DangerouslySkipPermissions_Disabled(t *testing.T) {
 	}
 }
 
+func TestCmdBuild_DisallowedSchedulingTools(t *testing.T) {
+	tmpDir := t.TempDir()
+	wsDir := filepath.Join(tmpDir, "workspace")
+
+	args := []string{
+		"--agent-workspace-dir", wsDir,
+	}
+
+	output := captureBuildOutput(t, args)
+
+	var result map[string]interface{}
+	if err := json.Unmarshal(output, &result); err != nil {
+		t.Fatalf("Failed to parse JSON output: %v", err)
+	}
+
+	cmd := result["cmd"].([]interface{})
+	assertSequence(t, cmd, "--disallowedTools", "CronCreate,CronDelete,CronList")
+}
+
 // --- helpers ---
 
 // captureBuildOutput runs cmdBuild and captures its stdout JSON output.