fix: address PR #836 review — forward task_producer to MCP contexts + cleanups

🔴 nc_get_vector_sync_status reported pending=0 for INGEST_QUEUE=postgres: the
AppContext/OAuthAppContext per-session yields snapshotted the stream fields but
never forwarded task_producer, so lifespan_ctx.task_producer was always None.
Convert task_producer to a @property that reads _vector_sync_state live (like
eviction_task_group), removing the snapshot field so the yields can't drop it.
Add a regression test pinning the contract on both contexts.

🟡 Remove the unused _RECLAIM_TASK_NAME constant.
🟡 get_procrastinate_conninfo: warn + document that DATABASE_URL query params
   (application_name, connect_timeout, …) are dropped.
🟡 worker: open the procrastinate App once — apply_ingest_queue_schema gains
   manage_connection=False so the worker reuses its own open connector instead
   of a redundant open/close before run_worker_async.

🟢 Clarify the apply-schema broad-except comment (non-race errors re-raise) and
   document the deliberate Any typing in ingest_status.get_ingest_pending.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

nextcloud_mcp_server/app.py

@@ -355,10 +355,18 @@ class AppContext:
     storage: "RefreshTokenStorage | None" = None
     document_send_stream: MemoryObjectSendStream | None = None
     document_receive_stream: MemoryObjectReceiveStream | None = None
-    task_producer: "TaskProducer | None" = None
     shutdown_event: anyio.Event | None = None
     scanner_wake_event: anyio.Event | None = None
 
+    @property
+    def task_producer(self) -> "TaskProducer | None":
+        # Read dynamically from the module-level singleton (like
+        # eviction_task_group) rather than snapshotting at yield time — that way
+        # a session can't observe a stale ``None`` and the per-session yields
+        # can't forget to forward it (the bug this property replaces). The
+        # vector-sync status tool reads this for postgres-backend job counts.
+        return _vector_sync_state.task_producer
+
     @property
     def eviction_task_group(self) -> TaskGroup | None:
         # Read dynamically from the module-level singleton instead of
@@ -381,10 +389,14 @@ class OAuthAppContext:
     server_client_id: str | None = None  # MCP server's OAuth client ID (static or DCR)
     document_send_stream: MemoryObjectSendStream | None = None
     document_receive_stream: MemoryObjectReceiveStream | None = None
-    task_producer: "TaskProducer | None" = None
     shutdown_event: anyio.Event | None = None
     scanner_wake_event: anyio.Event | None = None
 
+    @property
+    def task_producer(self) -> "TaskProducer | None":
+        # See AppContext.task_producer for rationale.
+        return _vector_sync_state.task_producer
+
     @property
     def eviction_task_group(self) -> TaskGroup | None:
         # See AppContext.eviction_task_group for rationale.
@@ -606,8 +618,8 @@ async def app_lifespan_basic(server: FastMCP) -> AsyncIterator[AppContext]:
             document_receive_stream=_vector_sync_state.document_receive_stream,
             shutdown_event=_vector_sync_state.shutdown_event,
             scanner_wake_event=_vector_sync_state.scanner_wake_event,
-            # eviction_task_group is exposed via @property (reads
-            # _vector_sync_state at access time, not snapshot).
+            # task_producer and eviction_task_group are exposed via @property
+            # (read _vector_sync_state at access time, not snapshot).
         )
     finally:
         logger.info("Shutting down BasicAuth session")
@@ -1239,8 +1251,8 @@ def get_app(transport: str = "streamable-http", enabled_apps: list[str] | None =
                     document_receive_stream=_vector_sync_state.document_receive_stream,
                     shutdown_event=_vector_sync_state.shutdown_event,
                     scanner_wake_event=_vector_sync_state.scanner_wake_event,
-                    # eviction_task_group is exposed via @property (reads
-                    # _vector_sync_state at access time, not snapshot).
+                    # task_producer and eviction_task_group are exposed via
+                    # @property (read _vector_sync_state at access time).
                 )
             finally:
                 logger.info("Shutting down MCP server")

nextcloud_mcp_server/cli.py

@@ -326,9 +326,12 @@ def worker(concurrency: int | None):
     app = get_procrastinate_app()
 
     async def _run() -> None:
-        # Defensive apply (the always-on API pod is the authoritative applier).
-        await apply_ingest_queue_schema(app)
+        # Open the connector pool once and reuse it for both the defensive
+        # schema apply (the always-on API pod is the authoritative applier) and
+        # the worker loop — manage_connection=False avoids a redundant
+        # open/close cycle on startup.
         async with app.open_async():
+            await apply_ingest_queue_schema(app, manage_connection=False)
             click.echo(
                 f"Ingest worker started: queue={INGEST_QUEUE_NAME} concurrency={workers}"
             )

nextcloud_mcp_server/config.py

@@ -1437,6 +1437,13 @@ def get_procrastinate_conninfo(database_url: str | None = None) -> str:
     (set ``DATABASE_URL`` to a ``+psycopg`` URL) rather than rewriting the driver
     in code — see charts repo, not this repo.
 
+    Only the host/port/dbname/user/password components are forwarded; any
+    ``?key=value`` query parameters on the URL (e.g. ``application_name``,
+    ``connect_timeout``) are **dropped** — TLS is set separately via
+    :func:`_pg_ssl_params`, and SQLAlchemy-specific query options don't map
+    cleanly to libpq keywords. A warning is logged when params are dropped so
+    operators aren't surprised.
+
     Raises ``ValueError`` for a non-Postgres URL — procrastinate is Postgres-only.
     """
     from psycopg.conninfo import make_conninfo  # noqa: PLC0415
@@ -1449,6 +1456,13 @@ def get_procrastinate_conninfo(database_url: str | None = None) -> str:
             f"got driver {url.drivername!r}"
         )
 
+    if url.query:
+        logging.getLogger(__name__).warning(
+            "Dropping DATABASE_URL query parameters not forwarded to the "
+            "procrastinate connector: %s",
+            ", ".join(sorted(url.query)),
+        )
+
     params: dict[str, str] = {}
     if url.host:
         params["host"] = url.host

nextcloud_mcp_server/vector/ingest_status.py

@@ -36,6 +36,12 @@ async def get_ingest_pending(
 ) -> IngestPending:
     """Compute outstanding ingest work for the configured queue backend.
 
+    ``task_producer`` and ``document_receive_stream`` are intentionally typed
+    ``Any``: they're duck-typed across backends. Only ``ProcrastinateTaskProducer``
+    exposes ``job_counts`` (the ``TaskProducer`` protocol doesn't), and the memory
+    backend reads the anyio stream's ``statistics()`` — so no single concrete type
+    or Protocol fits both branches, and we probe with ``hasattr`` instead.
+
     Never raises — a status surface must stay available even if the queue is
     unreachable; failures degrade to ``pending=0``.
     """

nextcloud_mcp_server/vector/queue/procrastinate.py

@@ -54,7 +54,6 @@ INGEST_QUEUE_NAME = "ingest"
 # Blueprint namespace → registered task names are prefixed ``ingest:``.
 _NAMESPACE = "ingest"
 INGEST_TASK_NAME = f"{_NAMESPACE}:process_document"
-_RECLAIM_TASK_NAME = f"{_NAMESPACE}:reclaim_stalled_jobs"
 
 # A crashed worker leaves its job in ``doing``; reclaim it once its (per-worker)
 # heartbeat is this many seconds stale. Sized well above the longest expected
@@ -217,8 +216,8 @@ async def _ingest_schema_present(app: App) -> bool:
     return bool(row["present"])
 
 
-async def apply_ingest_queue_schema(app: App | None = None) -> None:
-    """Create procrastinate's tables on a fresh database (apply-if-absent).
+async def _apply_ingest_queue_schema_open(app: App) -> None:
+    """Apply the ingest-queue schema on an already-open connector (apply-if-absent).
 
     procrastinate's ``schema.sql`` uses bare ``CREATE TYPE``/``CREATE TABLE``
     (not ``IF NOT EXISTS``), so it errors if re-applied — it is meant to run
@@ -230,25 +229,41 @@ async def apply_ingest_queue_schema(app: App | None = None) -> None:
     lock: Postgres DDL is transactional and procrastinate applies the whole
     schema in one transaction, so a pod that loses the race rolls back cleanly
     and we treat the resulting error as benign once the schema is present.
+    """
+    if await _ingest_schema_present(app):
+        logger.debug("ingest queue schema already present; skipping apply")
+        return
+    try:
+        await app.schema_manager.apply_schema_async()
+        logger.info("Applied procrastinate ingest queue schema")
+    except Exception:
+        # The apply runs in a single transaction, so any failure rolls back
+        # atomically (no partial schema). The only benign case is losing the
+        # create race to another pod — confirmed by re-checking presence. Any
+        # other failure (network, auth, …) leaves the schema absent, so this
+        # branch re-raises it rather than masking it.
+        if await _ingest_schema_present(app):
+            logger.info("Ingest queue schema applied concurrently by another pod")
+            return
+        raise
 
-    Opens a short-lived connection, so it is safe to call from the CLI
-    (``db upgrade`` / worker startup).
+
+async def apply_ingest_queue_schema(
+    app: App | None = None, *, manage_connection: bool = True
+) -> None:
+    """Create procrastinate's tables on a fresh database (apply-if-absent).
+
+    By default opens a short-lived connection, so it is safe to call standalone
+    from the CLI ``db upgrade`` path. Pass ``manage_connection=False`` when the
+    caller already holds an open connector (the ``worker`` command opens the App
+    once and reuses it) to avoid a redundant open/close cycle.
     """
     app = app or get_procrastinate_app()
+    if not manage_connection:
+        await _apply_ingest_queue_schema_open(app)
+        return
     async with app.open_async():
-        if await _ingest_schema_present(app):
-            logger.debug("ingest queue schema already present; skipping apply")
-            return
-        try:
-            await app.schema_manager.apply_schema_async()
-            logger.info("Applied procrastinate ingest queue schema")
-        except Exception:
-            # A racing pod likely committed the schema while our transaction
-            # rolled back atomically. Benign iff the schema is now present.
-            if await _ingest_schema_present(app):
-                logger.info("Ingest queue schema applied concurrently by another pod")
-                return
-            raise
+        await _apply_ingest_queue_schema_open(app)
 
 
 # Job-status keys procrastinate flattens into each list_queues row (alongside

tests/unit/test_app_context_task_producer.py

@@ -0,0 +1,34 @@
+"""Regression test for the lifespan context `task_producer` exposure (Deck #183).
+
+`nc_get_vector_sync_status` reads `lifespan_ctx.task_producer` for postgres-backend
+job counts. It was previously a snapshot dataclass field the per-session yields
+forgot to populate, so the tool always reported `pending=0` on the postgres
+backend. It is now a `@property` that reads the module singleton live (like
+`eviction_task_group`); these tests pin that contract.
+"""
+
+from typing import cast
+
+import pytest
+
+import nextcloud_mcp_server.app as app_module
+from nextcloud_mcp_server.app import AppContext, OAuthAppContext
+from nextcloud_mcp_server.client import NextcloudClient
+
+pytestmark = pytest.mark.unit
+
+
+def test_app_context_task_producer_reads_vector_sync_state(monkeypatch):
+    sentinel = object()
+    monkeypatch.setattr(app_module._vector_sync_state, "task_producer", sentinel)
+    ctx = AppContext(client=cast(NextcloudClient, None))
+    assert ctx.task_producer is sentinel
+
+
+def test_oauth_app_context_task_producer_reads_vector_sync_state(monkeypatch):
+    sentinel = object()
+    monkeypatch.setattr(app_module._vector_sync_state, "task_producer", sentinel)
+    ctx = OAuthAppContext(
+        nextcloud_host="https://example.test", token_verifier=object()
+    )
+    assert ctx.task_producer is sentinel