feat(integrations): declare which surface each client is, and its version (#7326)

integrations/agent-plugin-core/build/build.py

@@ -81,15 +81,23 @@ def replace_output(staged: Path, output: Path) -> Path:
     return output
 
 
-def _render_harness_id(host: str) -> str:
+def _render_harness_id(host: str, *, portable: bool = False) -> str:
     """Emit core/_harness_id.py for one host.
 
     Carries both vocabularies from a single definition: the PostHog `source` tag
     and the platform's X-Mem0-Source / X-Application pair. Keeping them together
     is what stops the two from drifting into separate vocabularies for the same
     thing.
+
+    The portable bundle runs in whatever editor a user drops it into, so it does
+    not know its host and must not guess one. HARNESS_ID stays "coding-agent",
+    which is true and useful for grouping in PostHog, but PLATFORM_APPLICATION is
+    left empty: X-Application names a real host app, is checked against an
+    allowlist server-side, and a value that is always discarded is worse than no
+    value -- it reads like an attribution we have and do not.
     """
     tag = host.upper().replace("-", "_") + "_PLUGIN"
+    application = "" if portable else host
     return (
         '"""Generated by integrations/agent-plugin-core/build/build.py. Do not edit."""\n'
         "\n"
@@ -98,8 +106,10 @@ def _render_harness_id(host: str) -> str:
         "\n"
         "# Platform-side vocabulary (mem0_event.source + X-Application). The whole\n"
         "# plugin family is one source; which editor it runs in is the application.\n"
+        "# An empty application means the host is unknown, and memory_core omits\n"
+        "# the header entirely rather than sending a placeholder.\n"
         'PLATFORM_SOURCE = "MEM0_PLUGIN"\n'
-        f'PLATFORM_APPLICATION = "{host}"\n'
+        f'PLATFORM_APPLICATION = "{application}"\n'
     )
 
 
@@ -122,7 +132,7 @@ def _bundle_python(
     # to call telemetry.init(). mcp_server.py and the detached telemetry.py sender
     # never did, which is how MCP searches reported harness=generic and every
     # batch they drained was labelled MEM0_PLUGIN regardless of the real host.
-    (core / "_harness_id.py").write_text(_render_harness_id(host), encoding="utf-8")
+    (core / "_harness_id.py").write_text(_render_harness_id(host, portable=portable), encoding="utf-8")
 
     values = {
         "PLUGIN_ROOT": plugin_root,