fix(stream): only warn about MCP servers we configured

The unconnected-server warning fired on everything `init` listed, which
includes whatever the host's own claude config carries. On the pi that
was seven unrelated connectors parked at `pending` / `needs-auth`
forever — seven bogus lines on every turn, burying the one line the
warning exists to surface.

Scope it to the servers passed in `mcp_servers`. Those are the ones we
have an expectation about; the rest are the host's business.

src/claude_code_api/backend.py

@@ -576,6 +576,7 @@ class ClaudeCodeBackend:
             proc,
             include_meta_user=self._opts.include_meta_user,
             include_partial_messages=self._opts.include_partial_messages,
+            expected_mcp_servers=tuple(self._opts.mcp_servers or ()),
             on_parse_error=self._on_parse_error,
         )
         await tm.start()

src/claude_code_api/stream.py

@@ -547,6 +547,7 @@ class StreamTurnManager:
         *,
         include_meta_user: bool = False,
         include_partial_messages: bool = False,
+        expected_mcp_servers: Iterable[str] = (),
         on_parse_error: Callable[[MessageParseError, dict[str, Any]], None]
         | None = None,
         owns_proc: bool = True,
@@ -554,6 +555,7 @@ class StreamTurnManager:
         self._proc = proc
         self._include_meta_user = include_meta_user
         self._include_partial_messages = include_partial_messages
+        self._expected_mcp = frozenset(expected_mcp_servers)
         self._on_parse_error = on_parse_error
         self._owns_proc = owns_proc
         self._started = False
@@ -749,7 +751,7 @@ class StreamTurnManager:
 
                 if rtype == "system" and record.get("subtype") in _BOOKKEEPING_SUBTYPES:
                     if record.get("subtype") == "init":
-                        _warn_on_unconnected_mcp(record, sid)
+                        _warn_on_unconnected_mcp(record, sid, self._expected_mcp)
                     continue
 
                 try:
@@ -835,8 +837,10 @@ class StreamTurnManager:
         await self.aclose()
 
 
-def _warn_on_unconnected_mcp(record: Mapping[str, Any], session_id: str) -> None:
-    """Log the MCP servers this turn is starting without.
+def _warn_on_unconnected_mcp(
+    record: Mapping[str, Any], session_id: str, expected: frozenset[str]
+) -> None:
+    """Log the MCP servers *we asked for* that this turn is starting without.
 
     A turn that begins while a server is still ``pending`` runs without
     that server's tools — silently, from the model's point of view: it
@@ -844,19 +848,31 @@ def _warn_on_unconnected_mcp(record: Mapping[str, Any], session_id: str) -> None
     the failure :meth:`StreamTurnManager.warmup` exists to prevent, so
     when it happens anyway it should be one grep away rather than a
     mystery about why the agent "forgot" it had a tool.
+
+    Scoped to `expected` deliberately. The CLI also loads servers from
+    the host's own claude config, and on a box where somebody once
+    logged in interactively that can be a fistful of unrelated
+    connectors sitting at ``pending`` or ``needs-auth`` forever —
+    observed in prod: seven of them, which would have meant seven bogus
+    warnings on every single turn, burying the one line that matters.
+    We only have expectations about servers we configured.
     """
+    if not expected:
+        return
     servers = record.get("mcp_servers")
     if not isinstance(servers, list):
         return
     stragglers = [
         f"{s.get('name')}:{s.get('status')}"
         for s in servers
-        if isinstance(s, Mapping) and s.get("status") not in ("connected", None)
+        if isinstance(s, Mapping)
+        and s.get("name") in expected
+        and s.get("status") not in ("connected", None)
     ]
     if stragglers:
         _log.warning(
-            "session_id=%s turn starting without %d MCP server(s): %s — "
-            "their tools are unavailable for this turn",
+            "session_id=%s turn starting without %d configured MCP server(s): "
+            "%s — their tools are unavailable for this turn",
             session_id,
             len(stragglers),
             ", ".join(stragglers),

tests/test_stream.py

@@ -371,7 +371,7 @@ async def test_unconnected_mcp_servers_are_logged(
             _result(),
         ]
     )
-    tm = StreamTurnManager(proc)  # type: ignore[arg-type]
+    tm = StreamTurnManager(proc, expected_mcp_servers=("telegram", "firefly"))  # type: ignore[arg-type]
     await tm.start()
     with caplog.at_level(logging.WARNING, logger="claude_code_api.stream"):
         await _drain(tm)
@@ -379,6 +379,39 @@ async def test_unconnected_mcp_servers_are_logged(
     assert "firefly" not in caplog.text
 
 
+async def test_unexpected_mcp_servers_are_not_warned_about(caplog: Any) -> None:
+    """Servers we didn't configure are the host's business, not ours.
+
+    A box where somebody logged in interactively can carry a pile of
+    unrelated connectors parked at ``needs-auth`` forever. Warning about
+    those every turn would bury the one line that matters.
+    """
+    import logging
+
+    proc = FakeStreamProcess(
+        [
+            {
+                "type": "system",
+                "subtype": "init",
+                "session_id": "s",
+                "mcp_servers": [
+                    {"name": "telegram", "status": "connected"},
+                    {"name": "claude.ai Gmail", "status": "needs-auth"},
+                    {"name": "claude.ai Drive", "status": "pending"},
+                ],
+            },
+            _assistant({"type": "text", "text": "x"}),
+            _result(),
+        ]
+    )
+    tm = StreamTurnManager(proc, expected_mcp_servers=("telegram",))  # type: ignore[arg-type]
+    await tm.start()
+    with caplog.at_level(logging.WARNING, logger="claude_code_api.stream"):
+        await _drain(tm)
+    assert "claude.ai" not in caplog.text
+    assert "MCP server" not in caplog.text
+
+
 # --- failures ------------------------------------------------------------