diff --git a/gui_v6/app.py b/gui_v6/app.py
index 13b3130..c2b8209 100644
--- a/gui_v6/app.py
+++ b/gui_v6/app.py
@@ -193,6 +193,7 @@ class AnonymisationApp(ctk.CTk):
                 on_theme_change=self.set_theme,
                 current_theme=self._theme_name,
                 usage_reporter=self._report_usage,
+                diag_reporter=self._report_diagnostics,
             )
         if key == "cfg":
             return ConfigTab(self._content, palette=p, state=self._config, config_path=self._user_config_path)
@@ -243,6 +244,36 @@ class AnonymisationApp(ctk.CTk):
         except Exception:
             pass
 
+    def _report_diagnostics(self, summary) -> None:
+        """Envoie les diagnostics en fin de run (non bloquant, best-effort).
+
+        N'envoie rien si aucune licence locale valide. Ne lève jamais.
+        """
+        try:
+            from gui_v6 import __version__ as gui_version
+            from gui_v6 import diagnostics
+            from gui_v6.logging_setup import log_file_path
+            from gui_v6.machine_id import default_machine_id
+
+            session = self._usage_session()
+            if session is None:
+                return
+            status = self._safe_local_status()
+            base_url = getattr(self._license_client, "_base_url", "") or resolve_portal_url()
+            spool = log_file_path().parent / "diagnostics_spool.jsonl"
+            diagnostics.report_run_diagnostics(
+                summary,
+                base_url=base_url,
+                license_ref=getattr(status, "license_ref", None),
+                machine_id=default_machine_id(),
+                session=session,
+                app_name="gui_v6",
+                app_version=gui_version,
+                spool_path=spool,
+            )
+        except Exception:
+            pass
+
     def _show(self, key: str) -> None:
         self._active = key
         self._refresh_tabbar()
diff --git a/gui_v6/tabs/tab_usage.py b/gui_v6/tabs/tab_usage.py
index 92d3822..b362ca5 100644
--- a/gui_v6/tabs/tab_usage.py
+++ b/gui_v6/tabs/tab_usage.py
@@ -68,6 +68,7 @@ class UsageTab(ctk.CTkFrame):
         on_theme_change=None,
         current_theme: str = theme_mod.DEFAULT_THEME,
         usage_reporter=None,
+        diag_reporter=None,
         **kwargs,
     ):
         self._p = palette or theme_mod.get_palette(current_theme)
@@ -80,6 +81,9 @@ class UsageTab(ctk.CTkFrame):
         # Callback(summary) appelé en fin de run pour la télémétrie d'usage
         # (envoi non bloquant, injecté par l'app avec le contexte licence).
         self._usage_reporter = usage_reporter
+        # Callback(summary) appelé en fin de run pour les diagnostics RGPD
+        # (envoi non bloquant, injecté par l'app avec le contexte licence).
+        self._diag_reporter = diag_reporter
 
         self._input_path: Path | None = None
         self._output_dir: Path | None = None
@@ -320,6 +324,7 @@ class UsageTab(ctk.CTkFrame):
         self._show_results(summary)
         self._show_failure_hint(summary)
         self._send_usage_telemetry(summary)
+        self._send_diagnostics(summary)
 
     def _send_usage_telemetry(self, summary) -> None:
         """Envoie la télémétrie d'usage en fin de run, sans bloquer l'UI ni le run."""
@@ -335,6 +340,20 @@ class UsageTab(ctk.CTkFrame):
 
         threading.Thread(target=work, daemon=True).start()
 
+    def _send_diagnostics(self, summary) -> None:
+        """Envoie les diagnostics en fin de run, sans bloquer l'UI ni le run."""
+        reporter = self._diag_reporter
+        if reporter is None:
+            return
+
+        def work():
+            try:
+                reporter(summary)
+            except Exception:
+                pass  # un échec diagnostic ne doit jamais remonter
+
+        threading.Thread(target=work, daemon=True).start()
+
     def _show_results(self, summary) -> None:
         p = self._p
         for w in self._stats_row.winfo_children():
diff --git a/tests/unit/test_gui_v6_diagnostics.py b/tests/unit/test_gui_v6_diagnostics.py
index ba89773..f41ff81 100644
--- a/tests/unit/test_gui_v6_diagnostics.py
+++ b/tests/unit/test_gui_v6_diagnostics.py
@@ -108,3 +108,29 @@ def test_flush_spool_sends_and_clears(tmp_path):
     sent = diagnostics.flush_spool(spool, diagnostics.DiagnosticsClient(
         "https://app.aivanov.eu", session=_FakeSession(status_code=200)))
     assert sent == 2 and not spool.exists()
+
+
+def test_tab_send_diagnostics_calls_reporter():
+    import threading
+    from gui_v6.tabs.tab_usage import UsageTab
+
+    tab = object.__new__(UsageTab)  # pas de Tk : on teste juste le helper
+    seen = {}
+    done = threading.Event()
+
+    def reporter(summary):
+        seen["summary"] = summary
+        done.set()
+
+    tab._diag_reporter = reporter
+    tab._send_diagnostics(SimpleNamespace(documents=[], failed=0))
+    assert done.wait(timeout=2.0)
+    assert seen["summary"] is not None
+
+
+def test_tab_send_diagnostics_noop_without_reporter():
+    from gui_v6.tabs.tab_usage import UsageTab
+
+    tab = object.__new__(UsageTab)
+    tab._diag_reporter = None
+    tab._send_diagnostics(SimpleNamespace(documents=[]))  # ne lève pas