diff --git a/rust/crates/rusty-claude-cli/src/main.rs b/rust/crates/rusty-claude-cli/src/main.rs
index 9385db8..b62db8b 100644
--- a/rust/crates/rusty-claude-cli/src/main.rs
+++ b/rust/crates/rusty-claude-cli/src/main.rs
@@ -1508,7 +1508,10 @@ fn render_doctor_report() -> Result<DoctorReport, Box<dyn std::error::Error>> {
             check_sandbox_health(&context.sandbox_status),
             check_system_health(&cwd, config.as_ref().ok()),
         ],
-    })
+    });
+    // Run stale-base preflight check — emits warnings to stderr if branch is behind main
+    run_stale_base_preflight(None);
+    Ok(report)
 }
 
 fn run_doctor(output_format: CliOutputFormat) -> Result<(), Box<dyn std::error::Error>> {