diff --git a/src/ad_seller/__init__.py b/src/ad_seller/__init__.py
index 98b2f3f..54a5f0e 100644
--- a/src/ad_seller/__init__.py
+++ b/src/ad_seller/__init__.py
@@ -3,4 +3,6 @@
 
 """Ad Seller System - IAB OpenDirect 2.1 compliant publisher/SSP agent system."""
 
+from ad_seller import _telemetry_shim  # noqa: F401  # MUST be first import — ar-r82f.21
+
 __version__ = "0.1.0"
diff --git a/src/ad_seller/_telemetry_shim.py b/src/ad_seller/_telemetry_shim.py
new file mode 100644
index 0000000..d0ebb39
--- /dev/null
+++ b/src/ad_seller/_telemetry_shim.py
@@ -0,0 +1,51 @@
+"""Telemetry / shutdown shim for crewai 1.14.6 (ar-r82f.21).
+
+Sets opt-out env vars *before* any crewai / chromadb / posthog / opentelemetry
+import path runs, so their constructors take the disabled branch instead of
+registering daemon threads and atexit handlers that hang the interpreter for
+~5 minutes on shutdown.
+
+This module must be imported BEFORE crewai. The `ad_seller/__init__.py` imports
+it as the very first statement.
+
+CLI entrypoints additionally call `os._exit(0)` after `app()` returns to bypass
+any straggling atexit handlers that snuck in via transitive deps.
+"""
+
+from __future__ import annotations
+
+import os
+
+_TELEMETRY_ENV = {
+    "OTEL_SDK_DISABLED": "true",
+    "CREWAI_DISABLE_TELEMETRY": "true",
+    "CREWAI_DISABLE_TRACKING": "true",
+    "CREWAI_TELEMETRY_OPT_OUT": "true",
+    "ANONYMIZED_TELEMETRY": "false",
+    "POSTHOG_DISABLED": "true",
+    "CHROMA_TELEMETRY_DISABLED": "true",
+    "DO_NOT_TRACK": "1",
+}
+
+for _k, _v in _TELEMETRY_ENV.items():
+    os.environ.setdefault(_k, _v)
+
+
+def force_exit_after(callable_):
+    """Wrap a typer/click entrypoint so the process hard-exits on return.
+
+    Usage in CLI main:
+        if __name__ == "__main__":
+            force_exit_after(app)()
+    """
+
+    def _wrapped(*args, **kwargs):
+        try:
+            result = callable_(*args, **kwargs)
+            os._exit(0)
+            return result
+        except SystemExit as e:
+            code = e.code if isinstance(e.code, int) else 0
+            os._exit(code)
+
+    return _wrapped
diff --git a/src/ad_seller/interfaces/cli/main.py b/src/ad_seller/interfaces/cli/main.py
index d634060..a49462a 100644
--- a/src/ad_seller/interfaces/cli/main.py
+++ b/src/ad_seller/interfaces/cli/main.py
@@ -337,4 +337,10 @@ def chat():
 
 
 if __name__ == "__main__":
-    app()
+    import os
+
+    try:
+        app()
+    except SystemExit as e:
+        os._exit(e.code if isinstance(e.code, int) else 0)
+    os._exit(0)