feat(tracking): namespace PostHog events with cli: prefix

comfy_cli/tracking.py

@@ -32,6 +32,12 @@
 # Only these events get the tracing_id --> workflow_run_id alias on PostHog.
 EXECUTION_EVENTS = frozenset({"execution_start", "execution_success", "execution_error"})
 
+# Namespace applied to event names on PostHog only, matching the
+# app:/hub:/registry: surface-prefix convention in the shared project. Mixpanel
+# keeps the bare legacy names (see ``mixpanel_name`` in track_event) so its
+# historical streams stay continuous.
+POSTHOG_EVENT_PREFIX = "cli:"
+
 # Kwargs whose values must never reach tracking system.
 # The key is kept (with a redacted marker) so we can still see whether the option was supplied.
 SENSITIVE_TRACKING_KEYS = frozenset({"api_key"})
@@ -113,9 +119,11 @@ def track(self, event_name: str, distinct_id: str | None, properties: dict[str,
         if not self.enabled or self.client is None or distinct_id is None:
             return
         merged = {**self._STANDARD_PROPERTIES, **properties}
+        # Membership check uses the canonical (unprefixed) name; the prefix is
+        # cosmetic to the PostHog taxonomy and applied only at capture time.
         if event_name in EXECUTION_EVENTS and "tracing_id" in merged:
             merged.setdefault("workflow_run_id", merged["tracing_id"])
-        self.client.capture(event=event_name, distinct_id=distinct_id, properties=merged)
+        self.client.capture(event=f"{POSTHOG_EVENT_PREFIX}{event_name}", distinct_id=distinct_id, properties=merged)
 
     def flush(self) -> None:
         if self.client is None:

tests/comfy_cli/test_tracking_providers.py

@@ -168,17 +168,36 @@ def test_mixpanel_name_kwarg_routes_to_mixpanel_only(self, tracking_with_two_pro
         _, mp_kwargs = mp_provider.client.track.call_args
         assert mp_kwargs["event_name"] == "run"
 
+        # PostHog receives the canonical name, prefixed; Mixpanel keeps "run".
         ph_kwargs = _posthog_capture_kwargs(ph_provider.client)
-        assert ph_kwargs["event"] == "execution_start"
+        assert ph_kwargs["event"] == "cli:execution_start"
 
-    def test_without_alias_both_providers_get_same_name(self, tracking_with_two_providers):
+    def test_posthog_prefixes_event_while_mixpanel_stays_bare(self, tracking_with_two_providers):
         tracking_mod, mp_provider, ph_provider = tracking_with_two_providers
         tracking_mod.track_event("execution_success")
 
         _, mp_kwargs = mp_provider.client.track.call_args
         ph_kwargs = _posthog_capture_kwargs(ph_provider.client)
+        # Mixpanel keeps the bare name for stream continuity; PostHog is namespaced.
         assert mp_kwargs["event_name"] == "execution_success"
-        assert ph_kwargs["event"] == "execution_success"
+        assert ph_kwargs["event"] == "cli:execution_success"
+
+
+class TestPostHogEventPrefix:
+    def test_top_level_event_is_prefixed(self, tracking_with_two_providers):
+        tracking_mod, mp_provider, ph_provider = tracking_with_two_providers
+        tracking_mod.track_event("install")
+
+        # Mixpanel bare, PostHog namespaced.
+        _, mp_kwargs = mp_provider.client.track.call_args
+        assert mp_kwargs["event_name"] == "install"
+        assert _posthog_capture_kwargs(ph_provider.client)["event"] == "cli:install"
+
+    def test_sub_namespaced_event_composes_with_prefix(self, tracking_with_two_providers):
+        tracking_mod, _, ph_provider = tracking_with_two_providers
+        tracking_mod.track_event("node:install")
+
+        assert _posthog_capture_kwargs(ph_provider.client)["event"] == "cli:node:install"
 
 
 class TestProviderConstruction: