sched: docs, probe retirement, MCP guard, coverage pins, executable example (T14)

tests/scheduling/test_poll.py

@@ -353,3 +353,34 @@ def test_poll_one_uses_fresh_definition_after_edit(tmp_path: Path) -> None:
     assert admission.resolved_input["team"] == "new"
     assert admission.schedule_revision == 2
     sched.ownership.release()
+
+
+def test_manual_and_other_schedule_runs_are_overlap_independent(
+    tmp_path: Path,
+) -> None:
+    from wf_api.run_lifecycle import (
+        materialize_admitted_view,
+        persist_admission,
+    )
+
+    sched, store, runs, sources = _harness(tmp_path, script={"*": "hang"})
+    t0 = ts(2026, 9, 8, 12, 0)
+    # An active run of another schedule occupies only its own slot.
+    _add(sched, store, sources, "b", OneShotSource(t0), t0 - timedelta(hours=1))
+    assert sched.poll(t0)["b"].startswith("admit:run-")
+    # A manual run (no schedule owner) participates in no overlap check.
+    manual_id = runs.allocate_run_id()
+    manual = persist_admission(
+        store=runs,
+        run_id=manual_id,
+        environment=fixture_environment(object()),
+        resolved_input={},
+        max_steps=None,
+    )
+    materialize_admitted_view(store=runs, admission=manual)
+    # A due one-shot admits despite both unrelated active runs.
+    _add(sched, store, sources, "a", OneShotSource(t0), t0 - timedelta(hours=1))
+    result = sched.poll(t0 + timedelta(seconds=1))
+    assert result["a"].startswith("admit:run-")
+    assert result["b"] == "exhausted"
+    sched.ownership.release()