fix(vehicle): keep config state per vehicle and surface ignored fields

Pending config, known fields and prefer_typed were class attributes, so every
vehicle shared one dict and one vehicle's pending change was sent for another.

The success branch looked for updated_vehicles under a response key, but the
config API reports success flat, so it never ran: fields were never recorded
and the pending batch was never cleared. Read the real shape, and warn naming
anything the API reports in ignoredFields.

Also record prefer_typed by value - it was assigned the result of an 'in'
test, so setting it False set it True.

Author: Bre77

AGENTS.md

@@ -6,6 +6,9 @@ This file is the project's committed home for project-intrinsic agent knowledge:
 - CI runs on push/PR: `.github/workflows/ci.yml`. Uses `uv` (see `uv.lock`).
 - `tests/` files are plain scripts (`if __name__ == "__main__"`), not pytest-based - pytest would collect zero tests here. Run each directly, e.g. `uv run python tests/test_field_type_coercion.py`.
 - `pyproject.toml` has a `[tool.mypy]` config but no dev-dependency group declares mypy, so `uv sync` alone won't install it. CI installs it ephemerally via `uv run --with mypy mypy teslemetry_stream`.
+- `Signal` in `const.py` tracks <https://api.teslemetry.com/fields.json>; the config route rejects names it does not know with `fst_err_validation`. Fields the API has retired are not rejected - it accepts the request and names them in a top-level `ignoredFields` list - so the library can lag the published list without breaking.
+- Config responses are shaped inconsistently: success is flat, `{"updated_vehicles": n}` plus `ignoredFields` when some were dropped, while errors are wrapped, `{"response": null, "error": ...}`. Do not look for `updated_vehicles` under `response`; that lookup silently never matches.
+- `update_config` debounces changes for 1s into one batch, and the API merges that batch into the vehicle's *full* config before forwarding it to Tesla. `tests/test_config_update.py` covers the response handling.
 
 ## Maintaining this file
 

teslemetry_stream/vehicle.py

@@ -64,15 +64,19 @@
 class TeslemetryStreamVehicle:
     """Handle streaming field updates."""
 
-    fields: dict[str, dict[str, int]] = {}
-    preferTyped: bool | None = None
-    _config: dict[str, Any] = {}
+    fields: dict[str, dict[str, int]]
+    preferTyped: bool | None
+    _config: dict[str, Any]
 
     def __init__(self, stream: TeslemetryStream, vin: str):
         # A dictionary of TelemetryField keys and null values
         self.stream = stream
         self.vin: str = vin
         self.lock = asyncio.Lock()
+        # Per-instance: class-level dicts would share pending config between vehicles
+        self.fields = {}
+        self.preferTyped = None
+        self._config = {}
 
     @property
     def config(self) -> dict[str, Any]:
@@ -121,17 +125,23 @@ async def update_config(self, config: dict[str, Any]) -> None:
                     "Error updating streaming config for %s: %s", self.vin, error
                 )
                 return
-            elif data.get("response", {}).get("updated_vehicles"):
-                LOGGER.info("Updated vehicle streaming config for %s", self.vin)
-                if fields := self._config.get("fields"):
-                    LOGGER.debug(
-                        "Configured streaming fields %s", ", ".join(fields.keys())
-                    )
-                    self.fields = {**self.fields, **fields}
-                if prefer_typed := self._config.get("prefer_typed") in [True, False]:
-                    LOGGER.debug("Configured streaming typed to %s", prefer_typed)
-                    self.preferTyped = prefer_typed
-                self._config.clear()
+
+            if ignored := data.get("ignoredFields"):
+                LOGGER.warning(
+                    "Streaming fields not available for %s and were ignored: %s",
+                    self.vin,
+                    ", ".join(ignored),
+                )
+
+            LOGGER.info("Updated vehicle streaming config for %s", self.vin)
+            if fields := self._config.get("fields"):
+                LOGGER.debug("Configured streaming fields %s", ", ".join(fields.keys()))
+                self.fields = {**self.fields, **fields}
+            prefer_typed = self._config.get("prefer_typed")
+            if isinstance(prefer_typed, bool):
+                LOGGER.debug("Configured streaming typed to %s", prefer_typed)
+                self.preferTyped = prefer_typed
+            self._config.clear()
 
     async def patch_config(self, config: dict[str, Any]) -> dict[str, Any]:
         """Modify the configuration for the vehicle."""

tests/test_config_update.py

@@ -0,0 +1,171 @@
+"""Checks ``update_config`` against the shapes the config API really returns.
+
+Success is reported flat as ``{"updated_vehicles": n}``, optionally with an
+``ignoredFields`` list naming fields the API dropped, and errors arrive as
+``{"response": null, "error": ...}``.
+"""
+from __future__ import annotations
+
+import asyncio
+import logging
+from typing import Any
+
+from teslemetry_stream.vehicle import TeslemetryStreamVehicle
+
+VIN_A = "TESTVIN0000000001"
+VIN_B = "TESTVIN0000000002"
+
+# Response bodies as observed against the live API
+ACCEPTED: dict[str, Any] = {"updated_vehicles": 1}
+IGNORED: dict[str, Any] = {"updated_vehicles": 1, "ignoredFields": ["RouteLastUpdated"]}
+ALL_IGNORED: dict[str, Any] = {
+    "updated_vehicles": 0,
+    "ignoredFields": ["LifetimeEnergyUsedDrive", "RouteLastUpdated"],
+}
+FAILED: dict[str, Any] = {"response": None, "error": "upstream internal error"}
+
+
+class FakeStream:
+    """Minimal stand-in for TeslemetryStream."""
+
+    manual = True
+
+
+def make_vehicle(vin: str, responses: list[Any]) -> TeslemetryStreamVehicle:
+    """Build a vehicle that records payloads and replays canned responses."""
+    vehicle = TeslemetryStreamVehicle(FakeStream(), vin)  # type: ignore[arg-type]
+    vehicle.sent = []  # type: ignore[attr-defined]
+
+    async def patch_config(config: dict[str, Any]) -> dict[str, Any]:
+        vehicle.sent.append(dict(config))  # type: ignore[attr-defined]
+        return responses.pop(0) if responses else ACCEPTED
+
+    vehicle.patch_config = patch_config  # type: ignore[assignment,method-assign]
+    return vehicle
+
+
+class CaptureWarnings(logging.Handler):
+    """Collect formatted WARNING records emitted by the library."""
+
+    def __init__(self) -> None:
+        super().__init__(level=logging.WARNING)
+        self.messages: list[str] = []
+
+    def emit(self, record: logging.LogRecord) -> None:
+        self.messages.append(record.getMessage())
+
+
+def check(label: str, ok: bool, detail: str = "") -> bool:
+    print(f"{label:<56} {'PASS' if ok else 'FAIL'}{'  ' + detail if detail else ''}")
+    return ok
+
+
+async def main() -> None:
+    results = []
+
+    # A confirmed update records its fields and leaves nothing pending.
+    vehicle = make_vehicle(VIN_A, [ACCEPTED])
+    await vehicle.update_config({"fields": {"BatteryLevel": {"interval_seconds": 60}}})
+    results.append(
+        check(
+            "a confirmed update records its fields",
+            "BatteryLevel" in vehicle.fields and vehicle._config == {},
+            f"fields {sorted(vehicle.fields)}, pending {vehicle._config}",
+        )
+    )
+
+    # Ignored fields are named in a warning.
+    handler = CaptureWarnings()
+    logger = logging.getLogger("teslemetry_stream")
+    logger.addHandler(handler)
+    try:
+        vehicle = make_vehicle(VIN_A, [IGNORED])
+        await vehicle.update_config(
+            {"fields": {"BatteryLevel": None, "RouteLastUpdated": None}}
+        )
+        results.append(
+            check(
+                "ignored fields are named in a warning",
+                any("RouteLastUpdated" in m for m in handler.messages),
+                f"warnings {handler.messages}",
+            )
+        )
+
+        handler.messages.clear()
+        vehicle = make_vehicle(VIN_A, [ALL_IGNORED])
+        await vehicle.update_config({"fields": {"RouteLastUpdated": None}})
+        results.append(
+            check(
+                "every ignored field is named",
+                any(
+                    "RouteLastUpdated" in m and "LifetimeEnergyUsedDrive" in m
+                    for m in handler.messages
+                ),
+                f"warnings {handler.messages}",
+            )
+        )
+
+        handler.messages.clear()
+        vehicle = make_vehicle(VIN_A, [ACCEPTED])
+        await vehicle.update_config({"fields": {"BatteryLevel": None}})
+        results.append(
+            check(
+                "no warning when nothing was ignored",
+                not handler.messages,
+                f"warnings {handler.messages}",
+            )
+        )
+    finally:
+        logger.removeHandler(handler)
+
+    # A failed update does not record its fields as configured.
+    vehicle = make_vehicle(VIN_A, [FAILED])
+    await vehicle.update_config({"fields": {"BatteryLevel": None}})
+    results.append(
+        check(
+            "a failed update records no fields",
+            vehicle.fields == {},
+            f"fields {sorted(vehicle.fields)}",
+        )
+    )
+
+    # prefer_typed=False must be recorded as False, not coerced to True.
+    vehicle = make_vehicle(VIN_A, [ACCEPTED])
+    await vehicle.prefer_typed(False)
+    results.append(
+        check(
+            "prefer_typed(False) recorded as False",
+            vehicle.preferTyped is False,
+            f"got {vehicle.preferTyped!r}",
+        )
+    )
+
+    # Pending config must not be shared between vehicles.
+    first = make_vehicle(VIN_A, [FAILED])
+    second = make_vehicle(VIN_B, [ACCEPTED])
+    await first.update_config({"fields": {"RouteLastUpdated": None}})
+    await second.update_config({"fields": {"BatteryLevel": None}})
+    sent = second.sent[0]["fields"]  # type: ignore[attr-defined]
+    results.append(
+        check(
+            "one vehicle's pending config does not leak to another",
+            "RouteLastUpdated" not in sent,
+            f"sent {sorted(sent)}",
+        )
+    )
+    results.append(
+        check(
+            "one vehicle's recorded fields do not leak to another",
+            "BatteryLevel" not in first.fields,
+            f"first {sorted(first.fields)}, second {sorted(second.fields)}",
+        )
+    )
+
+    print("-" * 72)
+    print("ALL PASS" if all(results) else "FAILURES PRESENT")
+    if not all(results):
+        raise SystemExit(1)
+
+
+if __name__ == "__main__":
+    asyncio.run(main())