style(platform): format web page bot adapter

Load the instance creation timestamp from data/labels/instance_id.json
(backfilling+persisting it for instances created before the field existed),
expose it as constants.instance_create_ts, and include it in the heartbeat
payload so Space can anchor Time-To-Value / onboarding analytics on real
install time rather than first-heartbeat.

Verified: py_compile, ruff, pytest tests/unit_tests/telemetry/ (37 passed).

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "langbot"
-version = "4.10.1"
+version = "4.10.2"
 description = "Production-grade platform for building agentic IM bots"
 readme = "README.md"
 license-files = ["LICENSE"]

src/langbot/__init__.py

@@ -1,3 +1,3 @@
 """LangBot - Production-grade platform for building agentic IM bots"""
 
-__version__ = '4.10.1'
+__version__ = '4.10.2'

src/langbot/pkg/core/stages/load_config.py

@@ -202,6 +202,16 @@ class LoadConfigStage(stage.BootingStage):
                 constants.instance_id = new_id
         constants.edition = ap.instance_config.data.get('system', {}).get('edition', 'community')
 
+        # Instance creation timestamp: sourced from data/labels/instance_id.json.
+        # Instances created before this field existed (or supplied via
+        # system.instance_id) won't have it, so backfill with the current time
+        # and persist it via the dump below — from then on it stays stable.
+        instance_create_ts = ap.instance_id.data.get('instance_create_ts', 0)
+        if not isinstance(instance_create_ts, int) or instance_create_ts <= 0:
+            instance_create_ts = int(time.time())
+            ap.instance_id.data['instance_create_ts'] = instance_create_ts
+        constants.instance_create_ts = instance_create_ts
+
         print(f'LangBot instance id: {constants.instance_id}')
         print(f'LangBot edition: {constants.edition}')
 

src/langbot/pkg/platform/sources/web_page_bot_adapter.py

@@ -84,6 +84,18 @@ class WebPageBotAdapter(abstract_platform_adapter.AbstractMessagePlatformAdapter
     ):
         self.listeners.pop(event_type, None)
 
+    async def is_stream_output_supported(self) -> bool:
+        """Delegate stream output check to ws_adapter."""
+        if self._ws_adapter is not None:
+            return await self._ws_adapter.is_stream_output_supported()
+        return False
+
+    async def create_message_card(self, message_id: str | int, event: platform_events.MessageEvent) -> bool:
+        """Delegate create_message_card to ws_adapter."""
+        if self._ws_adapter is not None:
+            return await self._ws_adapter.create_message_card(message_id, event)
+        return False
+
     async def is_muted(self, group_id: int) -> bool:
         return False
 

src/langbot/pkg/telemetry/heartbeat.py

@@ -109,6 +109,7 @@ async def build_heartbeat_payload(ap: core_app.Application) -> dict:
         'query_id': '',
         'version': constants.semantic_version,
         'instance_id': constants.instance_id,
+        'instance_create_ts': constants.instance_create_ts,
         'edition': constants.edition,
         'features': features,
         'timestamp': datetime.now(timezone.utc).isoformat(),

src/langbot/pkg/utils/constants.py

@@ -16,3 +16,11 @@ debug_mode = False
 edition = 'community'
 
 instance_id = ''
+
+instance_create_ts = 0
+"""Unix timestamp (seconds) of when this instance was first created.
+
+Sourced from ``data/labels/instance_id.json``. Backfilled to the current
+time for instances created before this field existed, so it is always a
+positive value once load_config has run.
+"""

tests/unit_tests/telemetry/test_heartbeat.py

@@ -62,6 +62,7 @@ class TestBuildHeartbeatPayload:
 
         assert payload['event_type'] == 'instance_heartbeat'
         assert payload['query_id'] == ''
+        assert 'instance_create_ts' in payload
         assert 'timestamp' in payload
         f = payload['features']
         assert f['database'] == 'postgresql'

uv.lock

@@ -1967,7 +1967,7 @@ wheels = [
 
 [[package]]
 name = "langbot"
-version = "4.10.1"
+version = "4.10.2"
 source = { editable = "." }
 dependencies = [
     { name = "aiocqhttp" },