diff --git a/scripts/pluto_tx_smoke.py b/scripts/pluto_tx_smoke.py
index 64adbb9..97913ec 100755
--- a/scripts/pluto_tx_smoke.py
+++ b/scripts/pluto_tx_smoke.py
@@ -66,8 +66,9 @@ class LoggingFakeWs:
         pass
 
 
-def _make_iq_frame(buffer_size: int, tone_hz: float, sample_rate: float,
-                   phase_offset: float = 0.0) -> tuple[bytes, float]:
+def _make_iq_frame(
+    buffer_size: int, tone_hz: float, sample_rate: float, phase_offset: float = 0.0
+) -> tuple[bytes, float]:
     """Return ``(interleaved_float32_bytes, next_phase)`` for a sine tone.
 
     Emitting one continuous phase-coherent tone requires threading the phase
@@ -93,7 +94,9 @@ def _make_pluto_factory(identifier: str | None):
         if device != "pluto":
             raise ValueError(f"this script only drives pluto; got device={device!r}")
         from ria_toolkit_oss.sdr.pluto import Pluto
+
         return Pluto(identifier=identifier)
+
     return factory
 
 
@@ -130,13 +133,14 @@ async def _run(args: argparse.Namespace) -> int:
 
     # Abort if tx_start was rejected by an interlock (no session → nothing to do).
     if streamer._tx is None:
-        print("tx_start rejected — see [tx_status] line above for the reason.",
-              file=sys.stderr)
+        print("tx_start rejected — see [tx_status] line above for the reason.", file=sys.stderr)
         return 2
 
-    print(f"Transmitting at {args.frequency/1e6:.3f} MHz with "
-          f"{args.tone/1e3:.1f} kHz baseband tone at gain {args.gain} dB. "
-          f"{'Running for ' + str(args.duration) + 's' if args.duration > 0 else 'Run until Ctrl-C'}.")
+    print(
+        f"Transmitting at {args.frequency/1e6:.3f} MHz with "
+        f"{args.tone/1e3:.1f} kHz baseband tone at gain {args.gain} dB. "
+        f"{'Running for ' + str(args.duration) + 's' if args.duration > 0 else 'Run until Ctrl-C'}."
+    )
 
     # Arrange a clean shutdown on Ctrl-C.
     stop = asyncio.Event()
@@ -157,12 +161,11 @@ async def _run(args: argparse.Namespace) -> int:
     # topped up. The queue's own backpressure keeps us from spinning.
     produce_interval = buffer_dt * 0.5
     try:
+
         async def producer():
             nonlocal phase
             while not stop.is_set():
-                frame, phase = _make_iq_frame(
-                    args.buffer_size, args.tone, args.sample_rate, phase
-                )
+                frame, phase = _make_iq_frame(args.buffer_size, args.tone, args.sample_rate, phase)
                 await streamer.on_binary(frame)
                 await asyncio.sleep(produce_interval)
 
@@ -193,20 +196,17 @@ def main() -> int:
     p = argparse.ArgumentParser(
         description="End-to-end TX smoke test: agent → Pluto continuous tone.",
     )
-    p.add_argument("--identifier", default=None,
-                   help="Pluto IP/hostname (default: auto-discover pluto.local)")
-    p.add_argument("--frequency", type=float, default=3_410_000_000.0,
-                   help="TX LO in Hz (default 2.45 GHz)")
-    p.add_argument("--gain", type=float, default=-0.0,
-                   help="TX gain in dB; Pluto range [-89, 0] (default -30)")
-    p.add_argument("--sample-rate", type=float, default=1_000_000.0,
-                   help="Baseband sample rate (default 1 Msps)")
-    p.add_argument("--tone", type=float, default=100_000.0,
-                   help="Baseband tone offset in Hz; 0 = DC (default 100 kHz)")
-    p.add_argument("--buffer-size", type=int, default=4096,
-                   help="Complex samples per frame (default 4096)")
-    p.add_argument("--duration", type=float, default=60.0,
-                   help="Seconds to transmit; 0 = run until Ctrl-C (default 30)")
+    p.add_argument("--identifier", default=None, help="Pluto IP/hostname (default: auto-discover pluto.local)")
+    p.add_argument("--frequency", type=float, default=3_410_000_000.0, help="TX LO in Hz (default 2.45 GHz)")
+    p.add_argument("--gain", type=float, default=-0.0, help="TX gain in dB; Pluto range [-89, 0] (default -30)")
+    p.add_argument("--sample-rate", type=float, default=1_000_000.0, help="Baseband sample rate (default 1 Msps)")
+    p.add_argument(
+        "--tone", type=float, default=100_000.0, help="Baseband tone offset in Hz; 0 = DC (default 100 kHz)"
+    )
+    p.add_argument("--buffer-size", type=int, default=4096, help="Complex samples per frame (default 4096)")
+    p.add_argument(
+        "--duration", type=float, default=60.0, help="Seconds to transmit; 0 = run until Ctrl-C (default 30)"
+    )
     p.add_argument("--log-level", default="INFO")
     args = p.parse_args()
 
diff --git a/scripts/pluto_tx_ws_smoke.py b/scripts/pluto_tx_ws_smoke.py
index d4c8344..f828e0c 100755
--- a/scripts/pluto_tx_ws_smoke.py
+++ b/scripts/pluto_tx_ws_smoke.py
@@ -41,8 +41,7 @@ from ria_toolkit_oss.agent.streamer import Streamer
 from ria_toolkit_oss.agent.ws_client import WsClient
 
 
-def _make_iq_frame(buffer_size: int, tone_hz: float, sample_rate: float,
-                   phase_offset: float) -> tuple[bytes, float]:
+def _make_iq_frame(buffer_size: int, tone_hz: float, sample_rate: float, phase_offset: float) -> tuple[bytes, float]:
     n = np.arange(buffer_size, dtype=np.float64)
     phase = 2.0 * np.pi * tone_hz / sample_rate * n + phase_offset
     amp = 0.7
@@ -59,7 +58,9 @@ def _make_pluto_factory(identifier: str | None):
         if device != "pluto":
             raise ValueError(f"this script only drives pluto; got device={device!r}")
         from ria_toolkit_oss.sdr.pluto import Pluto
+
         return Pluto(identifier=identifier)
+
     return factory
 
 
@@ -73,27 +74,29 @@ async def _mock_hub_handler(ws, args, stop: asyncio.Event):
             payload = json.loads(first)
             if payload.get("type") == "heartbeat":
                 caps = payload.get("capabilities")
-                print(f"[mock-hub] agent heartbeat: capabilities={caps} "
-                      f"tx_enabled={payload.get('tx_enabled')}")
+                print(f"[mock-hub] agent heartbeat: capabilities={caps} " f"tx_enabled={payload.get('tx_enabled')}")
     except asyncio.TimeoutError:
         print("[mock-hub] warning: no heartbeat received in first 2s")
 
     # Arm the agent's TX path.
-    await ws.send(json.dumps({
-        "type": "tx_start",
-        "app_id": "ws-smoke",
-        "radio_config": {
-            "device": "pluto",
-            "identifier": args.identifier,
-            "tx_sample_rate": int(args.sample_rate),
-            "tx_center_frequency": int(args.frequency),
-            "tx_gain": int(args.gain),
-            "buffer_size": int(args.buffer_size),
-            "underrun_policy": "repeat",
-        },
-    }))
-    print(f"[mock-hub] sent tx_start at {args.frequency/1e6:.3f} MHz, "
-          f"gain={args.gain} dB")
+    await ws.send(
+        json.dumps(
+            {
+                "type": "tx_start",
+                "app_id": "ws-smoke",
+                "radio_config": {
+                    "device": "pluto",
+                    "identifier": args.identifier,
+                    "tx_sample_rate": int(args.sample_rate),
+                    "tx_center_frequency": int(args.frequency),
+                    "tx_gain": int(args.gain),
+                    "buffer_size": int(args.buffer_size),
+                    "underrun_policy": "repeat",
+                },
+            }
+        )
+    )
+    print(f"[mock-hub] sent tx_start at {args.frequency/1e6:.3f} MHz, " f"gain={args.gain} dB")
 
     # Producer: push IQ frames at a steady clip. Use a concurrent receiver so
     # tx_status frames show up in real time rather than being queued behind
@@ -112,15 +115,11 @@ async def _mock_hub_handler(ws, args, stop: asyncio.Event):
 
     recv_task = asyncio.create_task(receiver())
     try:
-        deadline = None if args.duration <= 0 else (
-            asyncio.get_event_loop().time() + args.duration
-        )
+        deadline = None if args.duration <= 0 else (asyncio.get_event_loop().time() + args.duration)
         while not stop.is_set():
             if deadline is not None and asyncio.get_event_loop().time() >= deadline:
                 break
-            frame, phase = _make_iq_frame(
-                args.buffer_size, args.tone, args.sample_rate, phase
-            )
+            frame, phase = _make_iq_frame(args.buffer_size, args.tone, args.sample_rate, phase)
             try:
                 await ws.send(frame)
             except websockets.ConnectionClosed:
@@ -204,20 +203,15 @@ def main() -> int:
     p = argparse.ArgumentParser(
         description="Full-stack TX smoke: localhost mock-hub → WS → agent → Pluto.",
     )
-    p.add_argument("--identifier", default=None,
-                   help="Pluto IP/hostname (default: auto-discover pluto.local)")
-    p.add_argument("--frequency", type=float, default=2_450_000_000.0,
-                   help="TX LO in Hz (default 2.45 GHz)")
-    p.add_argument("--gain", type=float, default=0.0,
-                   help="TX gain in dB; Pluto range [-89, 0] (default 0)")
-    p.add_argument("--sample-rate", type=float, default=1_000_000.0,
-                   help="Baseband sample rate (default 1 Msps)")
-    p.add_argument("--tone", type=float, default=100_000.0,
-                   help="Baseband tone offset in Hz (default 100 kHz)")
-    p.add_argument("--buffer-size", type=int, default=4096,
-                   help="Complex samples per frame (default 4096)")
-    p.add_argument("--duration", type=float, default=30.0,
-                   help="Seconds to transmit; 0 = run until Ctrl-C (default 30)")
+    p.add_argument("--identifier", default=None, help="Pluto IP/hostname (default: auto-discover pluto.local)")
+    p.add_argument("--frequency", type=float, default=2_450_000_000.0, help="TX LO in Hz (default 2.45 GHz)")
+    p.add_argument("--gain", type=float, default=0.0, help="TX gain in dB; Pluto range [-89, 0] (default 0)")
+    p.add_argument("--sample-rate", type=float, default=1_000_000.0, help="Baseband sample rate (default 1 Msps)")
+    p.add_argument("--tone", type=float, default=100_000.0, help="Baseband tone offset in Hz (default 100 kHz)")
+    p.add_argument("--buffer-size", type=int, default=4096, help="Complex samples per frame (default 4096)")
+    p.add_argument(
+        "--duration", type=float, default=30.0, help="Seconds to transmit; 0 = run until Ctrl-C (default 30)"
+    )
     p.add_argument("--log-level", default="INFO")
     args = p.parse_args()
 
diff --git a/src/ria_toolkit_oss/agent/cli.py b/src/ria_toolkit_oss/agent/cli.py
index dec8420..83a7769 100644
--- a/src/ria_toolkit_oss/agent/cli.py
+++ b/src/ria_toolkit_oss/agent/cli.py
@@ -118,9 +118,9 @@ def _derive_ws_url(hub_url: str, agent_id: str) -> str:
         return ""
     base = hub_url.rstrip("/")
     if base.startswith("https://"):
-        base = "wss://" + base[len("https://"):]
+        base = "wss://" + base[len("https://") :]
     elif base.startswith("http://"):
-        base = "ws://" + base[len("http://"):]
+        base = "ws://" + base[len("http://") :]
     suffix = f"/screens/agent/ws?agent_id={agent_id}" if agent_id else "/screens/agent/ws"
     return base + suffix
 
diff --git a/src/ria_toolkit_oss/agent/config.py b/src/ria_toolkit_oss/agent/config.py
index 431094a..37d20c8 100644
--- a/src/ria_toolkit_oss/agent/config.py
+++ b/src/ria_toolkit_oss/agent/config.py
@@ -22,6 +22,7 @@ import os
 from dataclasses import asdict, dataclass, field
 from pathlib import Path
 
+
 def _resolve_default_path() -> Path:
     return Path(os.environ.get("RIA_AGENT_CONFIG", str(Path.home() / ".ria" / "agent.json")))
 
diff --git a/src/ria_toolkit_oss/agent/hardware.py b/src/ria_toolkit_oss/agent/hardware.py
index d585e8f..98b4683 100644
--- a/src/ria_toolkit_oss/agent/hardware.py
+++ b/src/ria_toolkit_oss/agent/hardware.py
@@ -46,9 +46,7 @@ def heartbeat_payload(
         if c.tx_max_duration_s is not None:
             payload["tx_max_duration_s"] = float(c.tx_max_duration_s)
         if c.tx_allowed_freq_ranges:
-            payload["tx_allowed_freq_ranges"] = [
-                [float(lo), float(hi)] for lo, hi in c.tx_allowed_freq_ranges
-            ]
+            payload["tx_allowed_freq_ranges"] = [[float(lo), float(hi)] for lo, hi in c.tx_allowed_freq_ranges]
     if app_id:
         payload["app_id"] = app_id
     if sessions:
diff --git a/src/ria_toolkit_oss/agent/streamer.py b/src/ria_toolkit_oss/agent/streamer.py
index 51f1dce..6f727ff 100644
--- a/src/ria_toolkit_oss/agent/streamer.py
+++ b/src/ria_toolkit_oss/agent/streamer.py
@@ -270,9 +270,7 @@ class Streamer:
         )
         self._rx = session
         await self._send_status("streaming", app_id)
-        session.task = asyncio.create_task(
-            self._capture_loop(session), name="ria-streamer-capture"
-        )
+        session.task = asyncio.create_task(self._capture_loop(session), name="ria-streamer-capture")
 
     async def _handle_rx_stop(self, msg: dict) -> None:
         session = self._rx
@@ -310,9 +308,7 @@ class Streamer:
                         logger.warning("Applying configure failed: %s", exc)
 
                 try:
-                    samples = await loop.run_in_executor(
-                        None, session.sdr.rx, session.buffer_size
-                    )
+                    samples = await loop.run_in_executor(None, session.sdr.rx, session.buffer_size)
                 except Exception as exc:
                     from ria_toolkit_oss.sdr import SdrDisconnectedError
 
@@ -342,7 +338,7 @@ class Streamer:
     # ==================================================================
     # TX
 
-    async def _handle_tx_start(self, msg: dict) -> None:
+    async def _handle_tx_start(self, msg: dict) -> None:  # noqa: C901
         app_id = msg.get("app_id") or ""
         radio_config = dict(msg.get("radio_config") or {})
 
@@ -383,9 +379,7 @@ class Streamer:
         buffer_size = int(radio_config.pop("buffer_size", _DEFAULT_BUFFER_SIZE))
         underrun_policy = str(radio_config.pop("underrun_policy", "pause"))
         if underrun_policy not in ("pause", "zero", "repeat"):
-            await self._send_tx_status(
-                app_id, "error", f"invalid underrun_policy {underrun_policy!r}"
-            )
+            await self._send_tx_status(app_id, "error", f"invalid underrun_policy {underrun_policy!r}")
             return
         if not device:
             await self._send_tx_status(app_id, "error", "tx_start missing radio_config.device")
@@ -404,15 +398,10 @@ class Streamer:
             # manifest bug and we want it surfaced immediately, not papered
             # over with stale radio state.
             if hasattr(sdr, "init_tx"):
-                init_args = {
-                    k: radio_config.get(f"tx_{k}")
-                    for k in ("sample_rate", "center_frequency", "gain")
-                }
+                init_args = {k: radio_config.get(f"tx_{k}") for k in ("sample_rate", "center_frequency", "gain")}
                 missing = [f"tx_{k}" for k, v in init_args.items() if v is None]
                 if missing:
-                    raise ValueError(
-                        f"tx_start missing required radio_config keys: {missing}"
-                    )
+                    raise ValueError(f"tx_start missing required radio_config keys: {missing}")
                 sdr.init_tx(
                     sample_rate=init_args["sample_rate"],
                     center_frequency=init_args["center_frequency"],
@@ -498,9 +487,8 @@ class Streamer:
             return _silence(n)
 
         # Max-duration watchdog.
-        if (
-            session.max_duration_s is not None
-            and (time.monotonic() - session.started_at) >= float(session.max_duration_s)
+        if session.max_duration_s is not None and (time.monotonic() - session.started_at) >= float(
+            session.max_duration_s
         ):
             session.stop_event.set()
             try:
@@ -528,7 +516,7 @@ class Streamer:
         if arr.size < 2 or arr.size % 2 != 0:
             logger.warning("Malformed TX frame: %d floats (must be non-zero even count)", arr.size)
             return self._underrun_fill(session, n)
-        samples = (arr[0::2].astype(np.complex64) + 1j * arr[1::2].astype(np.complex64))
+        samples = arr[0::2].astype(np.complex64) + 1j * arr[1::2].astype(np.complex64)
         if samples.size < n:
             out = np.zeros(n, dtype=np.complex64)
             out[: samples.size] = samples
@@ -747,6 +735,7 @@ def _default_sdr_factory(device: str, identifier: str | None):
 # ---------------------------------------------------------------------------
 # Top-level entry
 
+
 async def run_streamer(ws_url: str, token: str, *, cfg: AgentConfig | None = None) -> None:
     """Connect to *ws_url* and run the streamer loop until cancelled."""
     ws = WsClient(ws_url, token)
diff --git a/src/ria_toolkit_oss/app/cli.py b/src/ria_toolkit_oss/app/cli.py
index 9bfb479..7a2b7c7 100644
--- a/src/ria_toolkit_oss/app/cli.py
+++ b/src/ria_toolkit_oss/app/cli.py
@@ -37,7 +37,7 @@ def _engine(cfg: _config.AppConfig, sudo_override: bool = False) -> list[str]:
     for exe in ("docker", "podman"):
         if shutil.which(exe):
             use_sudo = sudo_override or cfg.sudo
-            return (["sudo", exe] if use_sudo else [exe])
+            return ["sudo", exe] if use_sudo else [exe]
     print("error: neither 'docker' nor 'podman' found on PATH", file=sys.stderr)
     sys.exit(2)
 
@@ -96,7 +96,9 @@ def _hardware_flags(labels: dict, no_gpu: bool, no_usb: bool, no_host_net: bool)
         if _gpu_available():
             flags += ["--gpus", "all"]
         else:
-            notes.append("image wants GPU but no NVIDIA runtime detected — skipping --gpus (use --force-gpu to override)")
+            notes.append(
+                "image wants GPU but no NVIDIA runtime detected — skipping --gpus (use --force-gpu to override)"
+            )
 
     if hw_items & {"pluto", "rtlsdr", "hackrf", "bladerf"} and not no_usb:
         flags += ["--device", "/dev/bus/usb"]
diff --git a/src/ria_toolkit_oss/sdr/__init__.py b/src/ria_toolkit_oss/sdr/__init__.py
index 4b327a2..a712be6 100644
--- a/src/ria_toolkit_oss/sdr/__init__.py
+++ b/src/ria_toolkit_oss/sdr/__init__.py
@@ -15,8 +15,13 @@ __all__ = [
 ]
 
 from .mock import MockSDR
-from .sdr import SDR, SDRError, SdrDisconnectedError, SDRParameterError, translate_disconnect  # noqa: F401
-
+from .sdr import (  # noqa: F401
+    SDR,
+    SdrDisconnectedError,
+    SDRError,
+    SDRParameterError,
+    translate_disconnect,
+)
 
 _DRIVER_CANDIDATES: tuple[tuple[str, str, str], ...] = (
     ("mock", "ria_toolkit_oss.sdr.mock", "MockSDR"),
diff --git a/src/ria_toolkit_oss/sdr/pluto.py b/src/ria_toolkit_oss/sdr/pluto.py
index 88243b1..c78d36f 100644
--- a/src/ria_toolkit_oss/sdr/pluto.py
+++ b/src/ria_toolkit_oss/sdr/pluto.py
@@ -8,7 +8,12 @@ import adi
 import numpy as np
 
 from ria_toolkit_oss.datatypes.recording import Recording
-from ria_toolkit_oss.sdr.sdr import SDR, SDRError, SDRParameterError, translate_disconnect
+from ria_toolkit_oss.sdr.sdr import (
+    SDR,
+    SDRError,
+    SDRParameterError,
+    translate_disconnect,
+)
 
 
 class Pluto(SDR):
diff --git a/src/ria_toolkit_oss/sdr/sdr.py b/src/ria_toolkit_oss/sdr/sdr.py
index aba68d5..443f8fa 100644
--- a/src/ria_toolkit_oss/sdr/sdr.py
+++ b/src/ria_toolkit_oss/sdr/sdr.py
@@ -583,7 +583,7 @@ _DISCONNECT_MARKERS = (
     "i/o error",
     "input/output error",
     "errno 19",  # ENODEV
-    "errno 5",   # EIO
+    "errno 5",  # EIO
 )
 
 
diff --git a/tests/agent/test_cli_tx.py b/tests/agent/test_cli_tx.py
index 1543d4c..da66e91 100644
--- a/tests/agent/test_cli_tx.py
+++ b/tests/agent/test_cli_tx.py
@@ -26,9 +26,11 @@ class _FakeResp:
 
 def _run_register(argv: list[str], cfg_path) -> int:
     fake_resp = _FakeResp({"agent_id": "agent-1", "token": "tok-abc"})
-    with patch.dict("os.environ", {"RIA_AGENT_CONFIG": str(cfg_path)}, clear=False), \
-         patch("urllib.request.urlopen", return_value=fake_resp), \
-         patch.object(sys, "argv", ["ria-agent", *argv]):
+    with (
+        patch.dict("os.environ", {"RIA_AGENT_CONFIG": str(cfg_path)}, clear=False),
+        patch("urllib.request.urlopen", return_value=fake_resp),
+        patch.object(sys, "argv", ["ria-agent", *argv]),
+    ):
         try:
             agent_cli.main()
         except SystemExit as exc:
@@ -96,9 +98,11 @@ def test_stream_allow_tx_does_not_persist(tmp_path):
         captured["cfg"] = cfg
         return None
 
-    with patch.dict("os.environ", {"RIA_AGENT_CONFIG": str(cfg_path)}, clear=False), \
-         patch("ria_toolkit_oss.agent.streamer.run_streamer", new=_fake_run_streamer), \
-         patch.object(sys, "argv", ["ria-agent", "stream", "--allow-tx"]):
+    with (
+        patch.dict("os.environ", {"RIA_AGENT_CONFIG": str(cfg_path)}, clear=False),
+        patch("ria_toolkit_oss.agent.streamer.run_streamer", new=_fake_run_streamer),
+        patch.object(sys, "argv", ["ria-agent", "stream", "--allow-tx"]),
+    ):
         try:
             agent_cli.main()
         except SystemExit:
diff --git a/tests/agent/test_integration.py b/tests/agent/test_integration.py
index 168e7a6..01eb9ec 100644
--- a/tests/agent/test_integration.py
+++ b/tests/agent/test_integration.py
@@ -70,9 +70,7 @@ def test_server_start_stream_stop_cycle_over_real_ws():
                 reconnect_pause=0.05,
             )
             streamer = Streamer(ws=client, sdr_factory=lambda d, i: MockSDR(buffer_size=32, seed=0))
-            task = asyncio.create_task(
-                client.run(on_message=streamer.on_message, heartbeat=streamer.build_heartbeat)
-            )
+            task = asyncio.create_task(client.run(on_message=streamer.on_message, heartbeat=streamer.build_heartbeat))
             await asyncio.wait_for(ready.wait(), timeout=3.0)
             await asyncio.wait_for(stopped.wait(), timeout=3.0)
             client.stop()
diff --git a/tests/agent/test_integration_tx.py b/tests/agent/test_integration_tx.py
index 4fc13af..e5239d7 100644
--- a/tests/agent/test_integration_tx.py
+++ b/tests/agent/test_integration_tx.py
@@ -77,10 +77,7 @@ def test_server_tx_start_binary_stop_cycle_over_real_ws():
                     msg = await asyncio.wait_for(ws.recv(), timeout=2.0)
                     if isinstance(msg, str):
                         control_frames.append(json.loads(msg))
-                    if any(
-                        f.get("type") == "tx_status" and f.get("state") == "transmitting"
-                        for f in control_frames
-                    ):
+                    if any(f.get("type") == "tx_status" and f.get("state") == "transmitting" for f in control_frames):
                         break
 
                 await ws.send(json.dumps({"type": "tx_stop", "app_id": "tx-app"}))
diff --git a/tests/agent/test_param_lock_contention.py b/tests/agent/test_param_lock_contention.py
index e3d84fc..e70229e 100644
--- a/tests/agent/test_param_lock_contention.py
+++ b/tests/agent/test_param_lock_contention.py
@@ -30,7 +30,6 @@ from ria_toolkit_oss.agent.config import AgentConfig
 from ria_toolkit_oss.agent.streamer import Streamer
 from ria_toolkit_oss.sdr.mock import MockSDR
 
-
 _STRESS_S = float(os.environ.get("RIA_LOCK_STRESS_S", "2.0"))
 
 
@@ -156,18 +155,21 @@ def test_full_duplex_stays_healthy_over_stress_window():
         s = Streamer(ws=ws, sdr_factory=lambda d, i: sdr, cfg=AgentConfig(tx_enabled=True))
 
         await s.on_message(
-            {"type": "start", "app_id": "app-1",
-             "radio_config": {"device": "mock", "buffer_size": BUF}}
+            {"type": "start", "app_id": "app-1", "radio_config": {"device": "mock", "buffer_size": BUF}}
         )
         await s.on_message(
-            {"type": "tx_start", "app_id": "app-1",
-             "radio_config": {
-                 "device": "mock", "buffer_size": BUF,
-                 "tx_sample_rate": 1_000_000,
-                 "tx_center_frequency": 2.45e9,
-                 "tx_gain": -20,
-                 "underrun_policy": "zero",
-             }}
+            {
+                "type": "tx_start",
+                "app_id": "app-1",
+                "radio_config": {
+                    "device": "mock",
+                    "buffer_size": BUF,
+                    "tx_sample_rate": 1_000_000,
+                    "tx_center_frequency": 2.45e9,
+                    "tx_gain": -20,
+                    "underrun_policy": "zero",
+                },
+            }
         )
 
         marker = np.arange(BUF, dtype=np.complex64) + 1
@@ -180,12 +182,10 @@ def test_full_duplex_stays_healthy_over_stress_window():
                 # which routes through the same setters the stress test above
                 # verifies.
                 await s.on_message(
-                    {"type": "tx_configure", "app_id": "app-1",
-                     "radio_config": {"tx_sample_rate": 1_000_000 + i}}
+                    {"type": "tx_configure", "app_id": "app-1", "radio_config": {"tx_sample_rate": 1_000_000 + i}}
                 )
                 await s.on_message(
-                    {"type": "configure", "app_id": "app-1",
-                     "radio_config": {"sample_rate": 2_000_000 + i}}
+                    {"type": "configure", "app_id": "app-1", "radio_config": {"sample_rate": 2_000_000 + i}}
                 )
             i += 1
             await asyncio.sleep(0.005)
@@ -197,8 +197,7 @@ def test_full_duplex_stays_healthy_over_stress_window():
     ws, s = asyncio.run(scenario())
 
     # No error frame leaked out.
-    errors = [m for m in ws.json_sent
-              if m.get("type") in ("error", "tx_status") and m.get("state") == "error"]
+    errors = [m for m in ws.json_sent if m.get("type") in ("error", "tx_status") and m.get("state") == "error"]
     assert errors == [], f"Unexpected error frames: {errors}"
     # RX produced IQ frames and TX's callback ran — heartbeat-level contention
     # check: both setter paths were hit at least once during configure dispatch.
diff --git a/tests/agent/test_streamer.py b/tests/agent/test_streamer.py
index da2956c..44f98e0 100644
--- a/tests/agent/test_streamer.py
+++ b/tests/agent/test_streamer.py
@@ -121,9 +121,7 @@ def test_start_without_device_emits_error():
 def test_configure_queues_update():
     async def scenario():
         streamer = Streamer(ws=FakeWs(), sdr_factory=_factory)
-        await streamer.on_message(
-            {"type": "configure", "app_id": "x", "radio_config": {"center_frequency": 915e6}}
-        )
+        await streamer.on_message({"type": "configure", "app_id": "x", "radio_config": {"center_frequency": 915e6}})
         # Before start(), pending config lives on the standalone dict exposed via the _pending_config shim.
         return streamer._pending_config
 
diff --git a/tests/agent/test_tx_safety.py b/tests/agent/test_tx_safety.py
index 2de2939..385835f 100644
--- a/tests/agent/test_tx_safety.py
+++ b/tests/agent/test_tx_safety.py
@@ -143,10 +143,7 @@ def test_rejects_duplicate_tx_session():
         return ws
 
     ws = asyncio.run(scenario())
-    errors = [
-        m for m in ws.json_sent
-        if m.get("type") == "tx_status" and m.get("state") == "error"
-    ]
+    errors = [m for m in ws.json_sent if m.get("type") == "tx_status" and m.get("state") == "error"]
     assert any("already active" in e.get("message", "") for e in errors)
 
 
diff --git a/tests/agent/test_tx_underrun.py b/tests/agent/test_tx_underrun.py
index 8fbe020..95e4277 100644
--- a/tests/agent/test_tx_underrun.py
+++ b/tests/agent/test_tx_underrun.py
@@ -70,10 +70,7 @@ def test_underrun_pause_stops_session_and_emits_status():
         # Do not push any buffers. The callback underruns on first tick and
         # the watchdog should emit "underrun" and tear down.
         for _ in range(100):
-            if any(
-                m.get("type") == "tx_status" and m.get("state") == "underrun"
-                for m in ws.json_sent
-            ):
+            if any(m.get("type") == "tx_status" and m.get("state") == "underrun" for m in ws.json_sent):
                 break
             await asyncio.sleep(0.01)
         for _ in range(50):
@@ -103,9 +100,7 @@ def test_underrun_zero_keeps_session_alive():
 
     ws, still_alive = asyncio.run(scenario())
     # No underrun status emitted (policy absorbs it silently).
-    assert not any(
-        m.get("type") == "tx_status" and m.get("state") == "underrun" for m in ws.json_sent
-    )
+    assert not any(m.get("type") == "tx_status" and m.get("state") == "underrun" for m in ws.json_sent)
     assert still_alive
     # All produced buffers are zero (no real data was pushed).
     assert sdr.tx_produced, "expected at least one TX callback invocation"
@@ -129,9 +124,7 @@ def test_underrun_repeat_replays_last_buffer():
 
     ws, sdr = asyncio.run(scenario())
     # No underrun status emitted.
-    assert not any(
-        m.get("type") == "tx_status" and m.get("state") == "underrun" for m in ws.json_sent
-    )
+    assert not any(m.get("type") == "tx_status" and m.get("state") == "underrun" for m in ws.json_sent)
     # At least two buffers equal to the marker — the real one and ≥1 repeat.
     matching = [b for b in sdr.tx_produced if np.array_equal(b, marker)]
     assert len(matching) >= 2, f"expected ≥2 buffers matching marker, got {len(matching)}"
diff --git a/tests/agent/test_ws_client.py b/tests/agent/test_ws_client.py
index c113b64..7717d5f 100644
--- a/tests/agent/test_ws_client.py
+++ b/tests/agent/test_ws_client.py
@@ -142,9 +142,7 @@ def test_malformed_control_frame_does_not_crash():
             async def on_msg(m):
                 handled.append(m)
 
-            task = asyncio.create_task(
-                client.run(on_message=on_msg, heartbeat=lambda: {"type": "heartbeat"})
-            )
+            task = asyncio.create_task(client.run(on_message=on_msg, heartbeat=lambda: {"type": "heartbeat"}))
             for _ in range(50):
                 if handled:
                     break
diff --git a/tests/agent/test_ws_client_binary.py b/tests/agent/test_ws_client_binary.py
index 4d9ddc1..70bd97c 100644
--- a/tests/agent/test_ws_client_binary.py
+++ b/tests/agent/test_ws_client_binary.py
@@ -102,9 +102,7 @@ def test_binary_frame_dropped_when_no_handler():
             async def on_msg(m):
                 messages.append(m)
 
-            task = asyncio.create_task(
-                client.run(on_message=on_msg, heartbeat=lambda: {"type": "heartbeat"})
-            )
+            task = asyncio.create_task(client.run(on_message=on_msg, heartbeat=lambda: {"type": "heartbeat"}))
             for _ in range(50):
                 if messages:
                     break