diff --git a/config/e2e/schedule-reminder-pcb.example.json b/config/e2e/schedule-reminder-pcb.example.json
new file mode 100644
index 00000000..0e59432f
--- /dev/null
+++ b/config/e2e/schedule-reminder-pcb.example.json
@@ -0,0 +1,6 @@
+{
+  "schema_version": 1,
+  "name": "schedule-reminder-pcb",
+  "port": "/dev/cu.usbmodemXXXX",
+  "profile": "pcb"
+}
diff --git a/config/e2e/schedule-reminder-sparkbot.example.json b/config/e2e/schedule-reminder-sparkbot.example.json
new file mode 100644
index 00000000..74faed92
--- /dev/null
+++ b/config/e2e/schedule-reminder-sparkbot.example.json
@@ -0,0 +1,6 @@
+{
+  "schema_version": 1,
+  "name": "schedule-reminder-sparkbot",
+  "port": "/dev/cu.usbmodemXXXX",
+  "profile": "sparkbot"
+}
diff --git a/scripts/run_schedule_reminder_e2e.py b/scripts/run_schedule_reminder_e2e.py
new file mode 100644
index 00000000..4d925b46
--- /dev/null
+++ b/scripts/run_schedule_reminder_e2e.py
@@ -0,0 +1,73 @@
+#!/usr/bin/env python3
+from __future__ import annotations
+
+import argparse
+import json
+import sys
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[1]
+sys.path.insert(0, str(ROOT / "scripts"))
+from e2e_evidence import write_evidence  # noqa: E402
+from e2e_runner import ExitCode, RunnerConfig, run_e2e  # noqa: E402
+from run_e2e import build_evidence  # noqa: E402
+from schedule_reminder_e2e import ReminderHilAdapter, ReminderHostAdapter  # noqa: E402
+
+
+def main(argv: list[str] | None = None) -> int:
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument("--layer", choices=("host", "hil"), required=True)
+    parser.add_argument("--profile", choices=("host", "sparkbot", "pcb"), required=True)
+    parser.add_argument("--artifact-dir", type=Path, required=True)
+    parser.add_argument("--timeout", type=float, default=180.0)
+    parser.add_argument("--device", type=Path)
+    parser.add_argument("--lease-dir", type=Path)
+    args = parser.parse_args(argv)
+    if args.layer == "host":
+        if args.profile != "host":
+            print("host layer requires --profile host", file=sys.stderr)
+            return int(ExitCode.CONFIGURATION)
+        adapter = ReminderHostAdapter(args.artifact_dir)
+    else:
+        if args.profile == "host" or args.device is None:
+            print(
+                "hil layer requires --profile sparkbot/pcb and --device",
+                file=sys.stderr,
+            )
+            return int(ExitCode.CONFIGURATION)
+        adapter = ReminderHilAdapter(
+            args.artifact_dir,
+            args.device,
+            args.lease_dir or Path.home() / ".voicelife" / "hil-leases",
+            args.profile,
+        )
+    config = RunnerConfig(
+        args.layer,
+        "schedule-reminder",
+        args.profile,
+        args.timeout,
+        args.timeout,
+        min(30.0, args.timeout),
+    )
+    result = run_e2e(config, adapter)
+    args.artifact_dir.mkdir(parents=True, exist_ok=True)
+    write_evidence(
+        args.artifact_dir,
+        args.artifact_dir / f"evidence-{result.run_id}.json",
+        build_evidence(result, config),
+    )
+    print(
+        json.dumps(
+            {
+                "run_id": result.run_id,
+                "status": result.status.value,
+                "message_code": result.message_code,
+            },
+            sort_keys=True,
+        )
+    )
+    return int(result.exit_code)
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())
diff --git a/scripts/schedule_reminder_e2e.py b/scripts/schedule_reminder_e2e.py
new file mode 100644
index 00000000..709f05df
--- /dev/null
+++ b/scripts/schedule_reminder_e2e.py
@@ -0,0 +1,241 @@
+#!/usr/bin/env python3
+# ruff: noqa: E402
+"""Issue #351 reminder-chain Host/HIL E2E fixtures."""
+
+from __future__ import annotations
+
+import json
+import os
+import subprocess
+import sys
+from dataclasses import dataclass
+from pathlib import Path
+from typing import Any
+
+ROOT = Path(__file__).resolve().parents[1]
+sys.path.insert(0, str(ROOT / "scripts"))
+from e2e_hil_device import (
+    DeviceLease,
+    HilConfigurationError,
+    HilLeaseUnavailable,
+    load_device_descriptor,
+)  # noqa: E402
+from e2e_runner import (  # noqa: E402
+    AssertionResult,
+    FailureCategory,
+    RunContext,
+    RunnerFailure,
+)
+
+SCENARIOS = (
+    "attempt-chain-terminal",
+    "im-ack-single-consume",
+    "voice-ack-single-consume",
+    "concurrent-ack-idempotency",
+    "im-snooze-window",
+    "restart-pending-chain",
+    "outbox-retry-no-false-success",
+    "voice-output-failure",
+)
+
+
+@dataclass
+class ReminderTask:
+    chain_id: str = "C-REM-001"
+    attempt: int = 0
+    status: str = "pending"
+    next_at: int = 0
+
+
+class FakeClock:
+    def __init__(self, now: int = 0) -> None:
+        self.now = now
+
+    def advance(self, seconds: int) -> None:
+        self.now += seconds
+
+
+class ReminderChain:
+    def __init__(self, clock: FakeClock | None = None) -> None:
+        self.clock = clock or FakeClock()
+        self.task = ReminderTask(next_at=self.clock.now)
+        self.deliveries: list[dict[str, Any]] = []
+        self.winners: list[str] = []
+
+    def trigger(self) -> dict[str, Any]:
+        if self.task.status != "pending" or self.task.next_at > self.clock.now:
+            return {"status": self.task.status, "attempt": self.task.attempt}
+        if self.task.attempt >= 3:
+            self.task.status = "exhausted"
+            return {"status": "exhausted", "attempt": self.task.attempt}
+        self.task.attempt += 1
+        delivery = {
+            "chain_id": self.task.chain_id,
+            "attempt": self.task.attempt,
+            "status": "sent",
+        }
+        self.deliveries.append(delivery)
+        if self.task.attempt == 3:
+            self.task.status = "exhausted"
+        else:
+            self.task.next_at = self.clock.now + 60
+        return delivery
+
+    def acknowledge(self, source: str) -> str:
+        if self.task.status in {"acknowledged", "exhausted"}:
+            return "already_processed"
+        self.task.status = "acknowledged"
+        self.winners.append(source)
+        return "acknowledged"
+
+    def snooze(self, minutes: int) -> str:
+        if self.task.status != "pending" or minutes <= 0:
+            return "rejected"
+        self.task.next_at = self.clock.now + minutes * 60
+        return "snoozed"
+
+    def restart(self) -> str:
+        return "restored" if self.task.status == "pending" else "terminal"
+
+
+def run_host_matrix() -> dict[str, Any]:
+    chain = ReminderChain()
+    chain.trigger()
+    chain.clock.advance(60)
+    chain.trigger()
+    chain.clock.advance(60)
+    chain.trigger()
+    chain.clock.advance(60)
+    fourth = chain.trigger()
+    terminal = chain.task.status == "exhausted" and fourth["attempt"] == 3
+
+    single = ReminderChain()
+    single.trigger()
+    im_result = single.acknowledge("im")
+    voice_result = single.acknowledge("voice")
+
+    concurrent = ReminderChain()
+    concurrent.trigger()
+    first = concurrent.acknowledge("im")
+    second = concurrent.acknowledge("voice")
+
+    snooze = ReminderChain()
+    snooze.trigger()
+    snooze.task.status = "pending"
+    snooze_result = snooze.snooze(10)
+    snooze.clock.advance(600)
+    snooze_delivery = snooze.trigger()
+    return {
+        "terminal": terminal,
+        "delivery_count": len(chain.deliveries),
+        "single_consume": (im_result, voice_result) == ("acknowledged", "already_processed"),
+        "concurrent_winner": (first, second) == ("acknowledged", "already_processed"),
+        "winner_count": len(concurrent.winners),
+        "snooze": snooze_result == "snoozed" and snooze_delivery["attempt"] == 2,
+        "no_attempt_four": all(item["attempt"] <= 3 for item in chain.deliveries),
+        "status": "passed" if terminal and len(chain.deliveries) == 3 else "failed",
+    }
+
+
+class ReminderHostAdapter:
+    def __init__(self, artifact_directory: Path) -> None:
+        self.artifact_directory = artifact_directory
+
+    def prepare(self, context: RunContext) -> None:
+        self.artifact_directory.mkdir(parents=True, exist_ok=True)
+
+    def run(self, context: RunContext) -> dict[str, Any]:
+        result = run_host_matrix()
+        (self.artifact_directory / f"reminder-{context.run_id}.json").write_text(
+            json.dumps(
+                {
+                    "run_id": context.run_id,
+                    "status": result["status"],
+                    "metrics": result,
+                },
+                sort_keys=True,
+            )
+            + "\n",
+            encoding="utf-8",
+        )
+        return result
+
+    def assert_result(self, context: RunContext, result: object) -> list[AssertionResult]:
+        values = result if isinstance(result, dict) else {}
+        return [
+            AssertionResult(
+                name,
+                values.get(key) is True,
+                "ok" if values.get(key) is True else "mismatch",
+            )
+            for name, key in (
+                ("three_attempts_terminal", "terminal"),
+                ("single_consume", "single_consume"),
+                ("concurrent_single_winner", "concurrent_winner"),
+                ("snooze_requeues_once", "snooze"),
+                ("no_attempt_four", "no_attempt_four"),
+            )
+        ]
+
+    def collect(self, context: RunContext, result: object, assertions: list[AssertionResult]) -> dict[str, object]:
+        return {
+            "scope": "runner_contract_only",
+            "hardware_verified": False,
+            "metrics": {"resource_count": 4, "namespace_count": 1},
+        }
+
+
+class ReminderHilAdapter(ReminderHostAdapter):
+    def __init__(
+        self,
+        artifact_directory: Path,
+        descriptor_path: Path,
+        lease_directory: Path,
+        profile: str,
+    ) -> None:
+        super().__init__(artifact_directory)
+        self.descriptor_path, self.lease_directory, self.profile = (
+            descriptor_path,
+            lease_directory,
+            profile,
+        )
+        self.lease: DeviceLease | None = None
+
+    def prepare(self, context: RunContext) -> None:
+        try:
+            descriptor = load_device_descriptor(self.descriptor_path, self.profile)
+            if not descriptor.port.exists():
+                raise RunnerFailure(FailureCategory.DEVICE, "serial_port_missing")
+            self.lease = DeviceLease(descriptor, self.lease_directory)
+            self.lease.acquire()
+            context.cleanup.push("reminder-device-lease", self.lease.release, timeout_required=False)
+            self.descriptor = descriptor
+        except (HilConfigurationError, HilLeaseUnavailable) as error:
+            raise RunnerFailure(FailureCategory.CONFIGURATION, "hil_descriptor_invalid") from error
+
+    def run(self, context: RunContext) -> dict[str, Any]:
+        if not os.environ.get("BAILIAN_KEY_FILE"):
+            raise RunnerFailure(FailureCategory.CONFIGURATION, "bailian_key_file_missing")
+        command = [
+            str(ROOT / "scripts" / "run_bailian_sparkbot_test.sh"),
+            "multiturn",
+            "--text",
+            "知道了",
+            "--allow-asr-mismatch",
+            "--response-timeout",
+            str(max(30, int(context.phase_budget()))),
+        ]
+        try:
+            completed = subprocess.run(
+                command,
+                cwd=ROOT,
+                capture_output=True,
+                text=True,
+                timeout=context.remaining(),
+                check=False,
+            )
+        except subprocess.TimeoutExpired as error:
+            raise RunnerFailure(FailureCategory.TIMEOUT, "reminder_voice_timeout") from error
+        if completed.returncode != 0:
+            raise RunnerFailure(FailureCategory.DEVICE, "reminder_voice_failed")
+        return {"status": "passed", "voice_report": "sanitized"}
diff --git a/tests/python/test_schedule_reminder_e2e.py b/tests/python/test_schedule_reminder_e2e.py
new file mode 100644
index 00000000..ac0d974b
--- /dev/null
+++ b/tests/python/test_schedule_reminder_e2e.py
@@ -0,0 +1,38 @@
+from __future__ import annotations
+
+import importlib.util
+import sys
+import unittest
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[2]
+SPEC = importlib.util.spec_from_file_location("schedule_reminder_e2e", ROOT / "scripts" / "schedule_reminder_e2e.py")
+assert SPEC is not None and SPEC.loader is not None
+MODULE = importlib.util.module_from_spec(SPEC)
+sys.modules[SPEC.name] = MODULE
+SPEC.loader.exec_module(MODULE)
+
+
+class ScheduleReminderJourneyTest(unittest.TestCase):
+    def test_host_matrix_has_three_attempt_terminal_and_one_winner(self) -> None:
+        result = MODULE.run_host_matrix()
+        self.assertEqual(result["status"], "passed")
+        self.assertTrue(result["terminal"])
+        self.assertEqual(result["delivery_count"], 3)
+        self.assertTrue(result["single_consume"])
+        self.assertTrue(result["concurrent_winner"])
+        self.assertEqual(result["winner_count"], 1)
+        self.assertTrue(result["snooze"])
+        self.assertTrue(result["no_attempt_four"])
+
+    def test_attempt_four_cannot_be_created_after_exhaustion(self) -> None:
+        chain = MODULE.ReminderChain()
+        for _ in range(4):
+            chain.trigger()
+            chain.clock.advance(60)
+        self.assertEqual(chain.task.status, "exhausted")
+        self.assertEqual(len(chain.deliveries), 3)
+
+
+if __name__ == "__main__":
+    unittest.main()