fix(perception): require joint clock readiness before source activation

experiments/perception/worker/streaming_profile_stage1/pilot_grpc_source.py

@@ -84,6 +84,10 @@ async def run(args):
         client = reader = None
 
     try:
+        # Reject a directory/missing input before establishing an activation clock.
+        first = next(camera_events(args.camera_index, 1)).time_ns
+        if not Path(args.sensor_archive).is_file() or not (root / "init.mp4").is_file():
+            raise ValueError("raw recording inputs are missing")
         deadline = time.monotonic() + 120
         startup_path = control / "bootstrap.json" if args.cross_host else grant_path
         while not startup_path.exists():
@@ -104,7 +108,6 @@ async def run(args):
             }
         else:
             clock, _ = read_grant(grant_path)
-        first = next(camera_events(args.camera_index, 1)).time_ns
         if clock["source_zero_ns"] != first - 500_000_000:
             raise ValueError("recording prefix does not match admitted source clock")
         report.update(

experiments/perception/worker/streaming_profile_stage1/pilot_source_control.py

@@ -22,6 +22,8 @@ class SourceControl:
         )
         self.source_zero_ns = int(bootstrap["source_zero_ns"])
         self.anchor = None  # Latch once after the initial clock handshake, never on resume.
+        self.proposal = None  # Retain an uncertain proposal across a lost ACK.
+        self.peer = None
         self.access = None
         self.confirmed = False
         self.failure = None
@@ -31,43 +33,79 @@ class SourceControl:
 
     async def update(self):
         probe, access = await self.client.poll()
-        bounds = self.window.add(probe)
+        self.window.add(probe)
         now = time.monotonic_ns()
-        if self.anchor is None:
+        if (
-            try:
+            self.anchor is None
-                self.window.current(now).require(now)
+            and self.proposal is None
-            except ClockMappingError:
+            and not self.ending
-                pass  # Pre-start clock warmup, not a running source pause or retimestamp.
+            and self.clocks_ready(now)
-            else:
+        ):
-                self.anchor = SourceAnchor(self.source_zero_ns, now + 2_000_000_000)
+            # Lead only allows bounded grant delivery/source setup AFTER two-sided readiness.
-        if self.anchor is not None:
+            # It is not a substitute for either clock gate or a retimestamp on recovery.
-            await self.client.acknowledge(probe, self.anchor, ended=self.ending)
+            self.proposal = SourceAnchor(self.source_zero_ns, now + 1_000_000_000)
-            self.confirmed = True
+        row = {
+            "t1_source_send_ns": str(probe.local_send_ns),
+            "t2_worker_receive_ns": str(probe.remote_receive_ns),
+            "t3_worker_send_ns": str(probe.remote_send_ns),
+            "t4_source_receive_ns": str(probe.local_receive_ns),
+            "source_report_send_ns": str(now),
+            "nonce": probe.nonce,
+            "acknowledged": False,
+        }
+        if len(self.samples) >= 2048:
+            raise ValueError("bounded clock diagnostic count exceeded")
+        self.samples.append(row)
+        # Every probe is echoed, even before an anchor exists. Worker warmup must
+        # see the same evidence; starting the source requires its explicit ACK.
+        self.peer = await self.client.acknowledge(
+            probe, self.anchor or self.proposal, ended=self.ending
+        )
+        now = time.monotonic_ns()
+        if self.anchor is not None and self.peer.anchor != self.anchor:
+            raise ValueError("accepted source anchor disappeared")
+        if self.peer.anchor is not None:
+            if self.peer.anchor != (self.anchor or self.proposal):
+                raise ValueError("foreign accepted source anchor")
+            self.anchor = self.peer.anchor
+        else:
+            self.proposal = None  # Explicit nonacceptance, not a lost response.
+        self.confirmed = True
         self.access = access
-        now = time.monotonic_ns()
+        bounds = self.window.current(now)
-        self.samples.append(
+        row.update(
             {
                 "at_ns": now,
+                "t5_worker_report_receive_ns": str(self.peer.bounds.measured_at_ns),
+                "t6_source_ack_receive_ns": str(now),
                 "bounds": bounds.to_dict(),
+                "peer": self.peer.to_dict(),
                 "uncertainty_ns": bounds.uncertainty_ns(now),
-                "ready": self.ready(),
+                "ready": self.anchor is not None and self.confirmed and self.clocks_ready(now),
-                "acknowledged": self.anchor is not None,
+                "acknowledged": True,
             }
         )
-        if len(self.samples) > 2048:
+
-            raise ValueError("bounded clock diagnostic count exceeded")
+    def clocks_ready(self, now):
+        if self.peer is None:
+            return False
+        try:
+            own = self.window.current(now)
+            own.require(now)
+            # Conservative latest possible Worker time includes ACK transit and
+            # elapsed time since receipt. A cached peer-ready boolean is unsafe.
+            _, upper = own.offset_at(now)
+            self.peer.bounds.require(now + upper)
+        except ClockMappingError:
+            return False
+        return True
 
     def ready(self):
         if self.failure:
             raise RuntimeError("source clock task failed") from self.failure
-        if not self.confirmed:
+        if not self.confirmed or self.anchor is None:
             return False
-        try:
+        return self.clocks_ready(time.monotonic_ns())
-            now = time.monotonic_ns()
-            self.window.current(now).require(now)
-        except ClockMappingError:
-            return False
-        return True
 
     async def loop(self):
         while not self.stopping:
@@ -91,13 +129,17 @@ class SourceControl:
 
     async def wait_anchor(self):
         deadline = time.monotonic() + 10
-        while self.anchor is None or not self.confirmed:
+        while True:
             if self.failure:
                 raise RuntimeError("initial source clock handshake failed") from self.failure
             if time.monotonic() > deadline:
                 raise TimeoutError("bounded initial source clock handshake")
+            if self.anchor is not None:
+                if time.monotonic_ns() >= self.anchor.local_zero_ns - 100_000_000:
+                    raise TimeoutError("joint source admission missed immutable start")
+                if self.ready() and self.access is not None:
+                    return self.anchor
             await asyncio.sleep(0.01)
-        return self.anchor
 
     async def finish(self):
         self.ending = True

experiments/perception/worker/streaming_profile_stage1/run_joint_pilot.py

@@ -276,7 +276,7 @@ def run(args):
         "costmap_freshness_mode": args.costmap_freshness,
         "ddrnet_min_source_interval_ms": args.ddrnet_min_source_interval_ms,
         "input_transport": args.input_transport,
-        "network_clock_mode": "acknowledged-monotonic/v1"
+        "network_clock_mode": "joint-start-monotonic/v2"
         if getattr(args, "network_cross_host", False)
         else "local-only",
         "network_clock_envelope": {

src/k1link/perception/streaming_clock.py

@@ -145,6 +145,7 @@ class ClockBounds:
             or type(self.offset_lower_ns) is not int
             or type(self.offset_upper_ns) is not int
             or self.offset_lower_ns > self.offset_upper_ns
+            or not -(2**63) < self.offset_lower_ns <= self.offset_upper_ns < 2**63
             or type(self.rate_ppm) is not int
             or not 1 <= self.rate_ppm <= 1000
             or type(self.timestamp_error_ns) is not int
@@ -187,6 +188,46 @@ class ClockBounds:
             "symmetric_network_assumed": False,
         }
 
+    @classmethod
+    def from_dict(cls, value: object) -> ClockBounds:
+        """Closed, exact-integer wire contract, including signed clock offsets."""
+        if not isinstance(value, dict):
+            raise ClockMappingError("invalid clock bounds document")
+
+        def integer(key: str) -> int:
+            raw = value.get(key)
+            if not isinstance(raw, str) or not 1 <= len(raw) <= 20:
+                raise ClockMappingError("clock nanoseconds must be canonical decimal strings")
+            try:
+                parsed = int(raw)
+            except ValueError as exc:
+                raise ClockMappingError("invalid clock nanoseconds") from exc
+            if str(parsed) != raw:
+                raise ClockMappingError("noncanonical clock nanoseconds")
+            return parsed
+
+        try:
+            result = cls(
+                value["local_clock_id"],
+                value["remote_clock_id"],
+                integer("measured_at_ns"),
+                integer("expires_at_ns"),
+                integer("offset_lower_ns"),
+                integer("offset_upper_ns"),
+                value["relative_rate_budget_ppm"],
+                integer("timestamp_error_budget_ns"),
+                value["samples"],
+            )
+        except KeyError as exc:
+            raise ClockMappingError("incomplete clock bounds") from exc
+        if (
+            value != result.to_dict()
+            or value.get("conditional_rate_error_envelope") is not True
+            or value.get("symmetric_network_assumed") is not False
+        ):
+            raise ClockMappingError("unsupported clock bounds document")
+        return result
+
 
 class ClockWindow:
     def __init__(

src/k1link/perception/streaming_control_grpc.py

@@ -21,9 +21,9 @@ import grpc  # type: ignore[import-untyped]
 
 from . import streaming_wire as wire
 from .realtime_contract import StreamStart
-from .streaming_clock import ClockProbe
+from .streaming_clock import ClockProbe, ClockReceipt
 from .streaming_grpc import OPTIONS, StreamAccess
-from .streaming_source_clock import SourceAnchor
+from .streaming_source_clock import SourceAnchor, SourceClockState
 
 SERVICE = "missioncore.perception.v1.StreamControl"
 METHOD = f"/{SERVICE}/Poll"
@@ -79,7 +79,8 @@ class StreamControlEndpoint:
         *,
         clock_id: str,
         clock_ns: Callable[[], int] = time.monotonic_ns,
-        observe: Callable[[ClockProbe, int, SourceAnchor, bool], None] | None = None,
+        observe: Callable[[ClockProbe, int, SourceAnchor | None, bool], SourceClockState]
+        | None = None,
     ) -> None:
         wire.identifier(clock_id)
         self.activation, self.pending, self.clock_id, self.clock_ns = (
@@ -198,7 +199,11 @@ class StreamControlEndpoint:
         try:
             self._authenticate(context)
             value = _document(raw)
-            if set(value) != {"probe", "anchor", "ended"} or self.observe is None:
+            if (
+                set(value) != {"schema_version", "probe", "anchor", "ended"}
+                or value["schema_version"] != "missioncore.stream-clock-report/v2"
+                or self.observe is None
+            ):
                 raise ValueError("clock receipt not admitted")
             evidence = value["probe"]
             with self._lock:
@@ -225,17 +230,18 @@ class StreamControlEndpoint:
                     )
                 ),
             )
-            anchor = SourceAnchor.from_dict(value["anchor"])
+            anchor = None if value["anchor"] is None else SourceAnchor.from_dict(value["anchor"])
-            self.observe(probe, received, anchor, value["ended"])
+            state = self.observe(probe, received, anchor, value["ended"])
         except (ValueError, TypeError):
             self.rejected += 1
             await context.abort(grpc.StatusCode.INVALID_ARGUMENT, "clock receipt rejected")
             return b""
         return wire.canonical(
             {
-                "schema_version": "missioncore.stream-clock-receipt/v1",
+                "schema_version": "missioncore.stream-clock-receipt/v2",
                 "activation_binding": wire.binding(self.activation),
                 "nonce": probe.nonce,
+                "state": state.to_dict(),
             }
         )
 
@@ -338,8 +344,8 @@ class StreamControlClient:
         await self.channel.close()
 
     async def acknowledge(
-        self, probe: ClockProbe, anchor: SourceAnchor, *, ended: bool = False
+        self, probe: ClockProbe, anchor: SourceAnchor | None, *, ended: bool = False
-    ) -> None:
+    ) -> SourceClockState:
         if self.polling or probe.local_clock_id != self.clock_id or type(ended) is not bool:
             raise ValueError("one scoped control request at a time")
         self.polling = True
@@ -365,17 +371,37 @@ class StreamControlClient:
             )
             response = _document(
                 await self.report_call(
-                    wire.canonical({"probe": evidence, "anchor": anchor.to_dict(), "ended": ended}),
+                    wire.canonical(
+                        {
+                            "schema_version": "missioncore.stream-clock-report/v2",
+                            "probe": evidence,
+                            "anchor": None if anchor is None else anchor.to_dict(),
+                            "ended": ended,
+                        }
+                    ),
                     metadata=self.ticket.metadata(),
                     timeout=0.5,
                     wait_for_ready=False,
                 )
             )
+            state = SourceClockState.from_dict(response.get("state"))
             if response != {
-                "schema_version": "missioncore.stream-clock-receipt/v1",
+                "schema_version": "missioncore.stream-clock-receipt/v2",
                 "activation_binding": wire.binding(self.ticket.activation),
                 "nonce": probe.nonce,
+                "state": state.to_dict(),
             }:
                 raise ValueError("clock receipt response binding mismatch")
+            if (
+                (state.bounds.local_clock_id, state.bounds.remote_clock_id)
+                != (probe.remote_clock_id, probe.local_clock_id)
+                or state.bounds.rate_ppm != 500
+                or state.bounds.timestamp_error_ns != 50_000
+                or state.ended != ended
+                or (state.anchor is not None and state.anchor != anchor)
+            ):
+                raise ValueError("clock receipt state binding mismatch")
+            ClockReceipt(probe, state.bounds.measured_at_ns)
+            return state
         finally:
             self.polling = False

src/k1link/perception/streaming_source_clock.py

@@ -6,7 +6,14 @@ import threading
 from dataclasses import dataclass
 
 from . import streaming_wire as wire
-from .streaming_clock import ClockMappingError, ClockProbe, ClockReceipt, ClockWindow, _stamp
+from .streaming_clock import (
+    ClockBounds,
+    ClockMappingError,
+    ClockProbe,
+    ClockReceipt,
+    ClockWindow,
+    _stamp,
+)
 from .streaming_continuity import StreamSuspended
 
 
@@ -32,6 +39,36 @@ class SourceAnchor:
         return cls(wire.uint64(value["source_zero_ns"]), wire.uint64(value["local_zero_ns"]))
 
 
+@dataclass(frozen=True)
+class SourceClockState:
+    bounds: ClockBounds
+    anchor: SourceAnchor | None
+    ended: bool
+
+    def __post_init__(self) -> None:
+        if not isinstance(self.bounds, ClockBounds) or type(self.ended) is not bool:
+            raise ValueError("invalid source clock state")
+        if self.anchor is not None and not isinstance(self.anchor, SourceAnchor):
+            raise ValueError("invalid accepted source anchor")
+
+    def to_dict(self) -> dict[str, object]:
+        return {
+            "bounds": self.bounds.to_dict(),
+            "anchor": None if self.anchor is None else self.anchor.to_dict(),
+            "ended": self.ended,
+        }
+
+    @classmethod
+    def from_dict(cls, value: object) -> SourceClockState:
+        if not isinstance(value, dict) or set(value) != {"bounds", "anchor", "ended"}:
+            raise ValueError("invalid source clock state document")
+        return cls(
+            ClockBounds.from_dict(value["bounds"]),
+            None if value["anchor"] is None else SourceAnchor.from_dict(value["anchor"]),
+            value["ended"],
+        )
+
+
 class SourceClockMonitor:
     def __init__(self, worker_clock_id: str, source_zero_ns: int) -> None:
         wire.identifier(worker_clock_id)
@@ -44,30 +81,40 @@ class SourceClockMonitor:
         self._lock = threading.RLock()
 
     def observe(
-        self, probe: ClockProbe, received_ns: int, anchor: SourceAnchor, ended: bool
+        self, probe: ClockProbe, received_ns: int, anchor: SourceAnchor | None, ended: bool
-    ) -> None:
+    ) -> SourceClockState:
         """Called only after the transport verifies the one-use issued challenge."""
         receipt = ClockReceipt(probe, received_ns)
         if probe.remote_clock_id != self.worker_clock_id or type(ended) is not bool:
             raise ValueError("foreign clock/status")
         with self._lock:
-            if self.ended or anchor.source_zero_ns != self.source_zero:
+            if self.ended or (anchor is not None and anchor.source_zero_ns != self.source_zero):
                 raise ValueError("source activation ended or source anchor changed")
             if self.anchor is None:
-                if not 0 <= anchor.local_zero_ns - probe.local_receive_ns <= 10_000_000_000:
+                if (
+                    anchor is not None
+                    and not 0 <= anchor.local_zero_ns - probe.local_receive_ns <= 10_000_000_000
+                ):
                     raise ValueError("initial source start must be bounded and not in the past")
-                self.anchor = anchor
+            elif anchor != self.anchor:
+                raise ValueError("source timeline is immutable for the activation")
+            if self.window is None:
                 self.window = ClockWindow(
                     self.worker_clock_id,
                     probe.local_clock_id,
                     rate_ppm=500,
                     timestamp_error_ns=50_000,
                 )
-            elif anchor != self.anchor:
+            bounds = self.window.add(receipt)
-                raise ValueError("source timeline is immutable for the activation")
+            if self.anchor is None and anchor is not None:
-            assert self.window is not None
+                try:
-            self.window.add(receipt)
+                    bounds.require(received_ns)
+                except ClockMappingError:
+                    pass  # Explicitly unaccepted proposal; keep warming BOTH clock windows.
+                else:
+                    self.anchor = anchor
             self.ended = ended
+            return SourceClockState(bounds, self.anchor, ended)
 
     def observed(self, now_ns: int) -> tuple[int, int]:
         """Source time midpoint + integer half-width, freshly checked at use."""

tests/test_perception_network_graph_adapter.py

@@ -161,68 +161,6 @@ def test_source_eof_ack_precedes_data_channel_retirement(adapter, has_stream):
     assert calls == (["ack", "end", "drain"] if has_stream else ["ack"])
 
 
-def test_source_anchor_latches_only_after_initial_clock_gate_and_never_on_recovery(
-    adapter, monkeypatch
-):
-    module = importlib.import_module("pilot_source_control")
-    healthy, acknowledgements = [False], []
-
-    class Bounds:
-        def require(self, now):
-            if not healthy[0]:
-                raise module.ClockMappingError("synthetic excessive uncertainty")
-
-        def to_dict(self):
-            return {}
-
-        def uncertainty_ns(self, now):
-            return 1_000_000 if healthy[0] else 6_000_000
-
-    class Client:
-        def __init__(self, *args, **kwargs):
-            pass
-
-        async def poll(self):
-            return object(), None
-
-        async def acknowledge(self, probe, anchor, *, ended):
-            acknowledgements.append(anchor)
-
-    monkeypatch.setattr(module, "StreamControlClient", Client)
-    monkeypatch.setattr(
-        module,
-        "ClockWindow",
-        lambda *a, **kw: SimpleNamespace(add=lambda probe: Bounds(), current=lambda now: Bounds()),
-    )
-    control = module.SourceControl(
-        "unused",
-        b"",
-        {
-            "activation": identity().to_dict(),
-            "token": "b" * 64,
-            "remote_clock_id": "worker",
-            "source_zero_ns": str(10**12),
-        },
-    )
-
-    async def check():
-        await control.update()
-        assert control.anchor is None and not control.ready() and not acknowledgements
-        healthy[0] = True
-        await control.update()
-        anchor = await control.wait_anchor()
-        assert anchor == control.anchor and control.ready()
-        healthy[0] = False
-        await control.update()
-        assert not control.ready() and control.anchor == anchor
-        healthy[0] = True
-        await control.update()
-        assert control.ready() and acknowledgements == [anchor] * 3
-        assert [row["acknowledged"] for row in control.samples] == [False, True, True, True]
-
-    asyncio.run(check())
-
-
 def test_cross_host_bridge_clock_expiry_retains_owner_and_rotates_epoch(tmp_path, tls, adapter):  # noqa: F811
     module, _ = adapter
     cert, key = tmp_path / "cert", tmp_path / "key"

tests/test_perception_source_clock.py

@@ -18,6 +18,37 @@ from k1link.perception.streaming_queue import StreamMailbox
 from k1link.perception.streaming_source_clock import SourceAnchor, SourceClockMonitor
 
 
+def test_responder_warms_without_source_admission_and_rejects_wide_start():
+    monitor = SourceClockMonitor("worker", 10**12)
+    wide = sample(outbound=20_000_000, inbound=20_000_000)
+    now = wide.local_receive_ns + 10**12 + 1_000_000
+    anchor = SourceAnchor(10**12, wide.local_receive_ns + 1_000_000_000)
+    response = monitor.observe(wide, now, anchor, False)
+    assert response.anchor is monitor.anchor is None and response.bounds.samples == 1
+    with pytest.raises(StreamSuspended):
+        monitor.observed(now)
+    narrow = sample(2)
+    now = narrow.local_receive_ns + 10**12 + 1_000_000
+    response = monitor.observe(narrow, now, None, False)
+    assert response.anchor is None and response.bounds.samples == 2
+    response.bounds.require(now)
+    with pytest.raises(StreamSuspended):
+        monitor.observed(now)  # Valid clock is not permission to start without an anchor.
+    third = sample(3)
+    now = third.local_receive_ns + 10**12 + 1_000_000
+    assert monitor.observe(third, now, anchor, False).anchor == anchor
+    assert monitor.observed(now)[1] < 5_000_000
+
+
+def test_end_before_start_is_terminal_without_inventing_a_source_timeline():
+    monitor = SourceClockMonitor("worker", 10**12)
+    first = sample()
+    state = monitor.observe(first, first.local_receive_ns + 10**12 + 1_000_000, None, True)
+    assert state.ended and state.anchor is None
+    with pytest.raises(StreamSuspended):
+        monitor.observed(state.bounds.measured_at_ns)
+
+
 def sample(number=1, outbound=1_000_000, inbound=2_000_000, offset=10**12):
     t1 = 10**16 + number * 100_000_000
     return ClockProbe(

tests/test_perception_source_start.py

@@ -0,0 +1,231 @@
+"""Joint pre-start admission, using real interval windows with synthetic time."""
+
+# ruff: noqa: F811 -- shared probe path fixture
+import asyncio
+import importlib
+from dataclasses import replace
+from types import SimpleNamespace
+
+import pytest
+from test_perception_network_graph_adapter import adapter  # noqa: F401
+from test_perception_streaming_control_grpc import controlled
+from test_perception_streaming_grpc import identity, tls  # noqa: F401
+
+from k1link.perception.streaming_clock import ClockProbe
+from k1link.perception.streaming_source_clock import SourceClockMonitor
+
+
+@pytest.fixture
+def joint(adapter, monkeypatch):
+    module = importlib.import_module("pilot_source_control")
+    clock = [10**16]
+    monitor = SourceClockMonitor("worker", 10**12)
+    state = SimpleNamespace(lost_ack=False, wide_peer=False, grant=True, proposals=[])
+
+    class Client:
+        def __init__(self, *args, clock_id):
+            self.clock_id = clock_id
+
+        async def poll(self):
+            clock[0] += 100_000_000
+            t1 = clock[0]
+            probe = ClockProbe(
+                self.clock_id,
+                "worker",
+                str(t1),
+                t1,
+                t1 + 10**12 + 1_000_000,
+                t1 + 10**12 + 1_010_000,
+                t1 + 3_010_000,
+            )
+            clock[0] = probe.local_receive_ns
+            return probe, object() if monitor.anchor and state.grant else None
+
+        async def acknowledge(self, probe, anchor, *, ended):
+            state.proposals.append(anchor)
+            peer = monitor.observe(probe, clock[0] + 10**12 + 1_000_000, anchor, ended)
+            clock[0] += 2_000_000
+            if state.lost_ack:
+                state.lost_ack = False
+                raise TimeoutError("lost ACK after Worker accepted anchor")
+            if state.wide_peer:
+                peer = replace(
+                    peer,
+                    bounds=replace(
+                        peer.bounds,
+                        offset_lower_ns=-(10**12) - 6_000_000,
+                        offset_upper_ns=-(10**12) + 6_000_000,
+                    ),
+                )
+            return peer
+
+    monkeypatch.setattr(
+        module,
+        "time",
+        SimpleNamespace(monotonic_ns=lambda: clock[0], monotonic=lambda: clock[0] / 1e9),
+    )
+    monkeypatch.setattr(module, "StreamControlClient", Client)
+    control = module.SourceControl(
+        "unused",
+        b"",
+        {
+            "activation": identity().to_dict(),
+            "token": "b" * 64,
+            "remote_clock_id": "worker",
+            "source_zero_ns": str(10**12),
+        },
+    )
+    return control, monitor, state, clock
+
+
+def test_both_windows_warm_before_anchor_and_grant_and_never_reanchor(joint):
+    control, monitor, state, clock = joint
+
+    async def check():
+        await control.update()
+        assert control.anchor is monitor.anchor is None
+        assert len(monitor.window.samples) == 1 and state.proposals == [None]
+        assert not control.ready()
+        await control.update()
+        anchor = control.anchor
+        assert anchor is not None and anchor == monitor.anchor and control.access is None
+        await control.update()
+        assert await control.wait_anchor() == anchor and control.ready()
+        state.wide_peer = True
+        await control.update()
+        assert not control.ready() and control.anchor == anchor
+        state.wide_peer = False
+        await control.update()
+        assert control.ready() and control.anchor == anchor
+        assert all(p == anchor for p in state.proposals[1:])
+        assert all(row["acknowledged"] for row in control.samples)
+        row = control.samples[-1]
+        assert (
+            int(row["t1_source_send_ns"])
+            < int(row["t4_source_receive_ns"])
+            < int(row["t6_source_ack_receive_ns"])
+        )
+        assert int(row["t3_worker_send_ns"]) < int(row["t5_worker_report_receive_ns"])
+        clock[0] += 2_000_000_000
+        assert not control.ready() and control.anchor == anchor
+
+    asyncio.run(check())
+
+
+def test_one_sided_readiness_never_proposes_start(joint):
+    control, monitor, state, _ = joint
+
+    async def check():
+        state.wide_peer = True
+        for _ in range(4):
+            await control.update()
+        assert control.anchor is monitor.anchor is None
+        assert state.proposals == [None] * 4
+        state.wide_peer = False
+        await control.update()
+        assert control.anchor is None  # Fresh peer evidence arrives in this ACK.
+        await control.update()
+        assert control.anchor == monitor.anchor and control.ready()
+
+    asyncio.run(check())
+
+
+def test_lost_acceptance_echo_keeps_exact_same_proposal(joint):
+    control, monitor, state, _ = joint
+
+    async def check():
+        await control.update()
+        state.lost_ack = True
+        with pytest.raises(TimeoutError):
+            await control.update()
+        proposal = control.proposal
+        assert proposal is not None and control.anchor is None and monitor.anchor == proposal
+        await control.update()
+        assert await control.wait_anchor() == proposal
+        assert state.proposals[-2:] == [proposal, proposal]
+        assert not control.samples[-2]["acknowledged"]
+
+    asyncio.run(check())
+
+
+def test_missing_grant_cannot_silently_start_late_or_reanchor(joint):
+    control, _, state, clock = joint
+
+    async def check():
+        state.grant = False
+        await control.update()
+        await control.update()
+        anchor = control.anchor
+        waiting = asyncio.create_task(control.wait_anchor())
+        await asyncio.sleep(0)
+        assert not waiting.done()
+        clock[0] = anchor.local_zero_ns
+        with pytest.raises(TimeoutError, match="immutable start"):
+            await waiting
+        assert control.anchor == anchor and control.access is None
+
+    asyncio.run(check())
+
+
+def test_peer_ready_does_not_replace_local_gate_or_refresh_peer_expiry(joint, monkeypatch):
+    control, _, _, clock = joint
+
+    async def check():
+        await control.update()
+        await control.update()
+        assert control.ready()
+        original = control.window.current
+
+        def wide(now):
+            return replace(
+                original(now),
+                offset_lower_ns=10**12 - 6_000_000,
+                offset_upper_ns=10**12 + 6_000_000,
+            )
+
+        monkeypatch.setattr(control.window, "current", wide)
+        assert not control.ready()
+        monkeypatch.setattr(control.window, "current", original)
+        assert control.ready()
+        old_peer = control.peer
+        clock[0] += 2_000_000_000
+        await control.update()
+        assert control.ready()
+        control.peer = old_peer
+        assert not control.ready()  # Fresh Mac probe cannot revive stale Worker evidence.
+
+    asyncio.run(check())
+
+
+def test_real_tls_joint_handshake_waits_for_worker_anchor_and_data_grant(tmp_path, tls, adapter):
+    module = importlib.import_module("pilot_source_control")
+
+    async def check():
+        async with controlled(tmp_path, tls) as (run, endpoint, server, client, pending, port):
+            monitor = SourceClockMonitor("worker", 10**12)
+            server.observe = monitor.observe
+            server.pending = lambda: pending[0] if monitor.anchor is not None else None
+            control = module.SourceControl(
+                f"localhost:{port}",
+                tls[0],
+                {
+                    "activation": identity().to_dict(),
+                    "token": client.ticket.token,
+                    "remote_clock_id": "worker",
+                    "source_zero_ns": str(10**12),
+                },
+            )
+            control.start()
+            try:
+                anchor = await control.wait_anchor()
+                assert anchor == monitor.anchor
+                assert control.access == pending[0] and control.ready()
+                assert control.samples[0]["peer"]["anchor"] is None
+                assert len(control.samples) >= 3
+                assert endpoint.active is None and run.lease.start == identity()
+                await control.finish()
+                assert monitor.ended
+            finally:
+                await control.close()
+
+    asyncio.run(check())

tests/test_perception_streaming_clock.py

@@ -4,11 +4,62 @@ from dataclasses import replace
 
 import pytest
 
-from k1link.perception.streaming_clock import ClockMappingError, ClockProbe, ClockWindow
+from k1link.perception.streaming_clock import (
+    ClockBounds,
+    ClockMappingError,
+    ClockProbe,
+    ClockWindow,
+)
 
 BASE = 10**16  # Deliberately above IEEE754 exact-integer range.
 
 
+@pytest.mark.parametrize(
+    "fault",
+    [
+        None,
+        "float",
+        "integer",
+        "plus",
+        "leading",
+        "negative_zero",
+        "extra",
+        "missing",
+        "flags",
+        "wide",
+        "schema",
+    ],
+)
+def test_bounds_wire_exact_closed_and_signed(fault):
+    bounds = window().add(probe())
+    document = bounds.to_dict()
+    if fault is None:
+        assert ClockBounds.from_dict(document) == bounds
+        return
+    if fault == "float":
+        document["measured_at_ns"] = float(bounds.measured_at_ns)
+    elif fault == "integer":
+        document["measured_at_ns"] = bounds.measured_at_ns
+    elif fault == "plus":
+        document["offset_upper_ns"] = "+1"
+    elif fault == "leading":
+        document["measured_at_ns"] = "0" + document["measured_at_ns"]
+    elif fault == "negative_zero":
+        document["offset_upper_ns"] = "-0"
+    elif fault == "extra":
+        document["ready"] = True
+    elif fault == "missing":
+        del document["samples"]
+    elif fault == "flags":
+        document["conditional_rate_error_envelope"] = 1
+    elif fault == "wide":
+        document["offset_upper_ns"] = str(2**63)
+    else:
+        document["schema_version"] = "old"
+    with pytest.raises(ClockMappingError):
+        ClockBounds.from_dict(document)
+
+
 def probe(number=1, *, outbound=1_000_000, inbound=2_000_000, offset=-(10**12)):
     sent = BASE + number * 100_000_000
     return ClockProbe(

tests/test_perception_streaming_control_grpc.py

@@ -254,3 +254,39 @@ def test_wrong_clock_receipt_cannot_update_mapping(tmp_path, tls, fault):
             assert monitor.anchor is None and monitor.window is None
 
     asyncio.run(check())
+
+
+@pytest.mark.parametrize("fault", ["v1", "nonce", "clock", "anchor", "time", "envelope", "end"])
+def test_receipt_v2_client_rejects_unbound_or_legacy_state(tmp_path, tls, fault):
+    async def check():
+        async with controlled(tmp_path, tls) as (_, _, control, client, _, _):
+            control.observe = SourceClockMonitor("worker", 10**12).observe
+            probe, _ = await client.poll()
+            original = client.report_call
+
+            async def altered(raw, **kwargs):
+                value = wire.parse_header(bytearray(await original(raw, **kwargs)))
+                if fault == "v1":
+                    value["schema_version"] = "missioncore.stream-clock-receipt/v1"
+                elif fault == "nonce":
+                    value["nonce"] = "foreign"
+                elif fault == "clock":
+                    value["state"]["bounds"]["local_clock_id"] = "foreign"
+                elif fault == "anchor":
+                    value["state"]["anchor"] = SourceAnchor(
+                        10**12, probe.local_receive_ns
+                    ).to_dict()
+                elif fault == "time":
+                    value["state"]["bounds"]["measured_at_ns"] = str(probe.remote_send_ns - 1)
+                elif fault == "envelope":
+                    value["state"]["bounds"]["relative_rate_budget_ppm"] = 1
+                else:
+                    value["state"]["ended"] = True
+                return wire.canonical(value)
+
+            client.report_call = altered
+            with pytest.raises(ValueError):
+                await client.acknowledge(probe, None)
+            assert not client.polling
+
+    asyncio.run(check())