diff --git a/apps/frontend/src/main/sentry.ts b/apps/frontend/src/main/sentry.ts
index 1b319003..c15f823e 100644
--- a/apps/frontend/src/main/sentry.ts
+++ b/apps/frontend/src/main/sentry.ts
@@ -202,5 +202,7 @@ export function getSentryEnvForSubprocess(): Record<string, string> {
     SENTRY_DSN: dsn,
     SENTRY_TRACES_SAMPLE_RATE: String(getTracesSampleRate()),
     SENTRY_PROFILES_SAMPLE_RATE: String(getProfilesSampleRate()),
+    // Pass SENTRY_DEV so Python backend also enables Sentry in dev mode
+    ...(process.env.SENTRY_DEV ? { SENTRY_DEV: process.env.SENTRY_DEV } : {}),
   };
 }