diff --git a/deploy/telemetry-plane/.env.example b/deploy/telemetry-plane/.env.example
new file mode 100644
index 0000000..90017c1
--- /dev/null
+++ b/deploy/telemetry-plane/.env.example
@@ -0,0 +1,10 @@
+MISSIONCORE_MQTT_BIND_ADDRESS=127.0.0.1
+MISSIONCORE_MQTT_PORT=1883
+MISSIONCORE_TELEMETRY_QUERY_PORT=18030
+MISSIONCORE_DB_NAME=missioncore_telemetry
+MISSIONCORE_DB_USER=missioncore_ingest
+MISSIONCORE_DB_PASSWORD=replace-with-a-random-local-secret
+MISSIONCORE_MQTT_INGEST_USER=missioncore-ingest
+MISSIONCORE_MQTT_INGEST_PASSWORD=replace-with-a-random-local-secret
+MISSIONCORE_MQTT_WORKER_006_USER=worker-006
+MISSIONCORE_MQTT_WORKER_006_PASSWORD=replace-with-a-different-random-local-secret
diff --git a/deploy/telemetry-plane/.gitignore b/deploy/telemetry-plane/.gitignore
new file mode 100644
index 0000000..147af14
--- /dev/null
+++ b/deploy/telemetry-plane/.gitignore
@@ -0,0 +1,2 @@
+.env
+runtime/
diff --git a/deploy/telemetry-plane/README.md b/deploy/telemetry-plane/README.md
new file mode 100644
index 0000000..4ea6404
--- /dev/null
+++ b/deploy/telemetry-plane/README.md
@@ -0,0 +1,81 @@
+# NDC Mission Core local telemetry plane
+
+Portable local-only telemetry infrastructure for compute contours.
+
+One Docker Compose project, `ndc-mission-core-telemetry`, owns three isolated
+containers:
+
+- `ndc-mission-core-mqtt-broker` — Eclipse Mosquitto `2.1.2-alpine`;
+- `ndc-mission-core-telemetry-timescaledb` — TimescaleDB HA OSS
+  `pg16.14-ts2.28.2-all-oss`;
+- `ndc-mission-core-telemetry-normalizer` — Mission Core telemetry normalizer.
+
+The Telegraf configuration templates cover Windows and Linux, but the agent runs as a
+host service rather than inside this Compose project. This preserves access to native
+Windows performance counters, Docker Desktop and NVIDIA telemetry.
+
+The normalizer exposes a read-only normalized telemetry adapter on
+`127.0.0.1:18030`. Mission Core reads this adapter; the browser never receives MQTT or
+Timescale credentials, and Timescale is not published on a host port.
+
+The stack is one deployment contour, not one multi-process container. Keeping broker,
+normalizer and database in separate containers preserves independent health checks,
+least-privilege boundaries and rollback while Compose provides one operator lifecycle:
+
+```bash
+docker compose ps
+docker compose up -d
+docker compose down
+```
+
+All NODE.DC-owned Docker objects use the lowercase `ndc-` namespace. Docker names are
+case-sensitive identifiers, so the product prefix is normalized to lowercase while the
+product name remains NODE.DC in operator-facing copy.
+
+This directory does not contain credentials. Copy `.env.example` to `.env`, generate
+unique passwords and build the ACL/password files before starting the stack.
+
+```bash
+uv run python prepare.py --initialize --mqtt-bind-address <MISSION_CORE_HOST_LAN_IP>
+docker compose up -d --build
+```
+
+Expected Docker object names:
+
+```text
+project:   ndc-mission-core-telemetry
+network:   ndc-mission-core-telemetry
+containers:
+  ndc-mission-core-mqtt-broker
+  ndc-mission-core-telemetry-normalizer
+  ndc-mission-core-telemetry-timescaledb
+volumes:
+  ndc-mission-core-mqtt-data
+  ndc-mission-core-telemetry-timescale-data
+```
+
+`prepare.py` passes passwords to `mosquitto_passwd` through stdin. Secrets are not placed
+in process arguments or committed files. `--initialize` generates `.env` with mode
+`0600` and refuses to replace existing credentials. The generated `.env` and `runtime/`
+directory are ignored by Git.
+
+The product architecture and topic contract are defined in
+`docs/adr/0031-local-compute-contour-telemetry-plane.md`.
+
+## Worker agent
+
+Worker 006 uses the official Windows Telegraf distribution as the host service
+`NDC Mission Core Telemetry Agent`. Install or update it with:
+
+```powershell
+.\telegraf\Install-NdcMissionCoreTelegraf.ps1
+.\telegraf\Update-NdcMissionCoreTelegraf.ps1
+```
+
+The update path validates the candidate configuration, backs up the active
+configuration and rolls back if the service does not return to `Running`. MQTT
+credentials are scoped to the service environment and must not be passed on a command
+line or stored in the repository.
+
+The stack and agent are intentionally not started by repository tests. Provisioning a
+machine is a separate, explicit operation.
diff --git a/deploy/telemetry-plane/compose.yaml b/deploy/telemetry-plane/compose.yaml
new file mode 100644
index 0000000..48bfe5c
--- /dev/null
+++ b/deploy/telemetry-plane/compose.yaml
@@ -0,0 +1,112 @@
+name: ndc-mission-core-telemetry
+
+x-ndc-labels: &ndc-labels
+  com.nodedc.product: mission-core
+  com.nodedc.stack: ndc-mission-core-telemetry
+  com.nodedc.managed-by: docker-compose
+
+services:
+  broker:
+    image: eclipse-mosquitto:2.1.2-alpine
+    container_name: ndc-mission-core-mqtt-broker
+    restart: unless-stopped
+    labels:
+      <<: *ndc-labels
+      com.nodedc.role: mqtt-broker
+    ports:
+      - "${MISSIONCORE_MQTT_BIND_ADDRESS:-127.0.0.1}:${MISSIONCORE_MQTT_PORT:-1883}:1883"
+    environment:
+      MISSIONCORE_MQTT_HEALTH_USER: "${MISSIONCORE_MQTT_INGEST_USER}"
+      MISSIONCORE_MQTT_HEALTH_PASSWORD: "${MISSIONCORE_MQTT_INGEST_PASSWORD}"
+    volumes:
+      - ./mosquitto/mosquitto.conf:/mosquitto/config/mosquitto.conf:ro
+      - ./runtime/mosquitto/passwords:/mosquitto/config/passwords:ro
+      - ./runtime/mosquitto/acl:/mosquitto/config/acl:ro
+      - broker-data:/mosquitto/data
+    healthcheck:
+      test:
+        - CMD-SHELL
+        - >-
+          mosquitto_sub -h 127.0.0.1 -t '$$SYS/broker/uptime' -C 1 -W 3
+          -u "$$MISSIONCORE_MQTT_HEALTH_USER"
+          -P "$$MISSIONCORE_MQTT_HEALTH_PASSWORD"
+      interval: 10s
+      timeout: 4s
+      retries: 6
+
+  timescale:
+    image: timescale/timescaledb-ha:pg16.14-ts2.28.2-all-oss
+    container_name: ndc-mission-core-telemetry-timescaledb
+    restart: unless-stopped
+    labels:
+      <<: *ndc-labels
+      com.nodedc.role: telemetry-database
+    environment:
+      POSTGRES_DB: "${MISSIONCORE_DB_NAME}"
+      POSTGRES_USER: "${MISSIONCORE_DB_USER}"
+      POSTGRES_PASSWORD: "${MISSIONCORE_DB_PASSWORD}"
+    volumes:
+      - timescale-data:/home/postgres/pgdata/data
+      - ./timescale/001_telemetry.sql:/docker-entrypoint-initdb.d/001_telemetry.sql:ro
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U ${MISSIONCORE_DB_USER} -d ${MISSIONCORE_DB_NAME}"]
+      interval: 10s
+      timeout: 5s
+      retries: 10
+
+  normalizer:
+    image: nodedc/mission-core-telemetry-normalizer:local
+    container_name: ndc-mission-core-telemetry-normalizer
+    build:
+      context: ../..
+      dockerfile: deploy/telemetry-plane/normalizer/Dockerfile
+    restart: unless-stopped
+    labels:
+      <<: *ndc-labels
+      com.nodedc.role: telemetry-normalizer
+    depends_on:
+      broker:
+        condition: service_healthy
+      timescale:
+        condition: service_healthy
+    ports:
+      - "127.0.0.1:${MISSIONCORE_TELEMETRY_QUERY_PORT:-18030}:18030"
+    environment:
+      MISSIONCORE_MQTT_HOST: broker
+      MISSIONCORE_MQTT_PORT: "1883"
+      MISSIONCORE_MQTT_USERNAME: "${MISSIONCORE_MQTT_INGEST_USER}"
+      MISSIONCORE_MQTT_PASSWORD: "${MISSIONCORE_MQTT_INGEST_PASSWORD}"
+      MISSIONCORE_DATABASE_DSN: >-
+        postgresql://${MISSIONCORE_DB_USER}:${MISSIONCORE_DB_PASSWORD}@timescale:5432/${MISSIONCORE_DB_NAME}
+      MISSIONCORE_QUERY_HOST: "0.0.0.0"
+      MISSIONCORE_QUERY_PORT: "18030"
+    healthcheck:
+      test:
+        - CMD
+        - python
+        - -c
+        - >-
+          import urllib.request;
+          urllib.request.urlopen('http://127.0.0.1:18030/health', timeout=3).read()
+      interval: 10s
+      timeout: 4s
+      retries: 6
+
+volumes:
+  broker-data:
+    name: ndc-mission-core-mqtt-data
+    labels:
+      <<: *ndc-labels
+      com.nodedc.role: mqtt-storage
+  timescale-data:
+    name: ndc-mission-core-telemetry-timescale-data
+    labels:
+      <<: *ndc-labels
+      com.nodedc.role: telemetry-storage
+
+networks:
+  default:
+    name: ndc-mission-core-telemetry
+    labels:
+      <<: *ndc-labels
+      com.nodedc.role: telemetry-network
diff --git a/deploy/telemetry-plane/mosquitto/mosquitto.conf b/deploy/telemetry-plane/mosquitto/mosquitto.conf
new file mode 100644
index 0000000..bbf63e5
--- /dev/null
+++ b/deploy/telemetry-plane/mosquitto/mosquitto.conf
@@ -0,0 +1,11 @@
+persistence true
+persistence_location /mosquitto/data/
+
+listener 1883 0.0.0.0
+allow_anonymous false
+password_file /mosquitto/config/passwords
+acl_file /mosquitto/config/acl
+
+log_dest stdout
+connection_messages true
+log_timestamp true
diff --git a/deploy/telemetry-plane/normalizer/Dockerfile b/deploy/telemetry-plane/normalizer/Dockerfile
new file mode 100644
index 0000000..4b44ad3
--- /dev/null
+++ b/deploy/telemetry-plane/normalizer/Dockerfile
@@ -0,0 +1,8 @@
+FROM python:3.12-slim
+
+WORKDIR /app
+RUN pip install --no-cache-dir "paho-mqtt>=2.1,<3" "psycopg[binary]>=3.2,<4"
+COPY deploy/telemetry-plane/normalizer/normalizer.py /app/normalizer.py
+
+USER 65532:65532
+ENTRYPOINT ["python", "/app/normalizer.py"]
diff --git a/deploy/telemetry-plane/normalizer/normalizer.py b/deploy/telemetry-plane/normalizer/normalizer.py
new file mode 100644
index 0000000..e93ba3e
--- /dev/null
+++ b/deploy/telemetry-plane/normalizer/normalizer.py
@@ -0,0 +1,378 @@
+from __future__ import annotations
+
+import json
+import os
+import re
+import threading
+import time
+from datetime import UTC, datetime
+from http import HTTPStatus
+from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer
+from typing import Any, Final
+from urllib.parse import parse_qs, urlparse
+
+TOPIC: Final = "mission-core/v1/contours/+/agents/+/+"
+TOPIC_RE: Final = re.compile(
+    r"^mission-core/v1/contours/(?P<contour>[-a-z0-9]+)/"
+    r"agents/(?P<agent>[-a-z0-9]+)/(?P<kind>host|runtime|pipeline|heartbeat)$"
+)
+SOURCE_SCHEMAS: Final = {
+    "host": "missioncore.agent-host-telemetry/v1",
+    "runtime": "missioncore.agent-runtime-telemetry/v1",
+    "pipeline": "missioncore.agent-pipeline-telemetry/v1",
+    "heartbeat": "missioncore.agent-heartbeat/v1",
+}
+TELEGRAF_SCHEMA: Final = "telegraf.metric-json/v1"
+QUERY_SCHEMA: Final = "missioncore.telemetry-query/v1"
+SAFE_IDENTIFIER: Final = re.compile(r"^[a-z0-9](?:[a-z0-9-]{0,62}[a-z0-9])?$")
+
+
+def _required(name: str) -> str:
+    value = os.environ.get(name, "").strip()
+    if not value:
+        raise RuntimeError(f"{name} is required")
+    return value
+
+
+def _timestamp(value: object) -> datetime:
+    if isinstance(value, int | float) and not isinstance(value, bool):
+        return datetime.fromtimestamp(float(value), tz=UTC)
+    if not isinstance(value, str):
+        raise ValueError("sample timestamp is required")
+    parsed = datetime.fromisoformat(value.replace("Z", "+00:00"))
+    if parsed.tzinfo is None:
+        raise ValueError("observed_at_utc must include a timezone")
+    return parsed.astimezone(UTC)
+
+
+def _optional_text(document: dict[str, Any], name: str) -> str | None:
+    value = document.get(name)
+    return value if isinstance(value, str) and value else None
+
+
+def _optional_integer(document: dict[str, Any], name: str) -> int | None:
+    value = document.get(name)
+    return value if isinstance(value, int) and not isinstance(value, bool) else None
+
+
+def _tag_text(document: dict[str, Any], name: str) -> str | None:
+    tags = document.get("tags")
+    if not isinstance(tags, dict):
+        return None
+    value = tags.get(name)
+    return value if isinstance(value, str) and value else None
+
+
+def _series_key(document: dict[str, Any]) -> str:
+    tags = document.get("tags")
+    if not isinstance(tags, dict):
+        value = document.get("series_key")
+        return value if isinstance(value, str) else ""
+    stable_tags = {
+        str(name): str(value)
+        for name, value in tags.items()
+        if name not in {"agent_id", "contour_id", "host", "node_id"}
+    }
+    return json.dumps(
+        stable_tags,
+        ensure_ascii=False,
+        sort_keys=True,
+        separators=(",", ":"),
+    )
+
+
+def _normalize(topic: str, payload: bytes) -> tuple[object, ...]:
+    match = TOPIC_RE.fullmatch(topic)
+    if match is None:
+        raise ValueError("topic is outside the telemetry contract")
+    document = json.loads(payload.decode("utf-8"))
+    if not isinstance(document, dict):
+        raise ValueError("payload must be an object")
+    kind = match.group("kind")
+    source_schema = document.get("schema_version")
+    if source_schema == SOURCE_SCHEMAS[kind]:
+        observed_value = document.get("observed_at_utc")
+        measurement = kind
+    elif (
+        kind == "host"
+        and isinstance(document.get("name"), str)
+        and isinstance(document.get("fields"), dict)
+    ):
+        source_schema = TELEGRAF_SCHEMA
+        observed_value = document.get("timestamp")
+        measurement = document["name"].strip()
+        if not measurement:
+            raise ValueError("Telegraf measurement name is required")
+    else:
+        raise ValueError("payload schema does not match topic kind")
+    node_id = document.get("node_id") or _tag_text(document, "node_id")
+    if not node_id:
+        node_id = _tag_text(document, "host")
+    if not isinstance(node_id, str) or not node_id.strip():
+        raise ValueError("node_id is required")
+    observed_at = _timestamp(observed_value)
+    return (
+        observed_at,
+        match.group("contour"),
+        match.group("agent"),
+        node_id.strip(),
+        kind,
+        measurement,
+        _series_key(document),
+        source_schema,
+        topic,
+        _optional_text(document, "lab_id") or _tag_text(document, "lab_id"),
+        _optional_text(document, "run_id") or _tag_text(document, "run_id"),
+        _optional_text(document, "request_id") or _tag_text(document, "request_id"),
+        _optional_integer(document, "frame_index"),
+        json.dumps(document, separators=(",", ":"), ensure_ascii=False),
+    )
+
+
+class TelemetryQueryServer(ThreadingHTTPServer):
+    daemon_threads = True
+
+    def __init__(self, server_address: tuple[str, int], dsn: str) -> None:
+        super().__init__(server_address, TelemetryQueryHandler)
+        self.dsn = dsn
+
+
+class TelemetryQueryHandler(BaseHTTPRequestHandler):
+    server: TelemetryQueryServer
+
+    def do_GET(self) -> None:  # noqa: N802 - stdlib HTTP handler contract
+        parsed = urlparse(self.path)
+        if parsed.path == "/health":
+            self._health()
+            return
+        match = re.fullmatch(
+            r"/v1/contours/(?P<contour>[-a-z0-9]+)/agents/"
+            r"(?P<agent>[-a-z0-9]+)/latest",
+            parsed.path,
+        )
+        if match is None:
+            self._json(HTTPStatus.NOT_FOUND, {"detail": "not found"})
+            return
+        query = parse_qs(parsed.query)
+        try:
+            max_age_seconds = int(query.get("max_age_seconds", ["120"])[0])
+        except ValueError:
+            self._json(HTTPStatus.BAD_REQUEST, {"detail": "invalid max_age_seconds"})
+            return
+        if not 1 <= max_age_seconds <= 86_400:
+            self._json(HTTPStatus.BAD_REQUEST, {"detail": "invalid max_age_seconds"})
+            return
+        self._latest(
+            match.group("contour"),
+            match.group("agent"),
+            max_age_seconds=max_age_seconds,
+        )
+
+    def log_message(self, format: str, *args: object) -> None:
+        print(f"telemetry query: {format % args}", flush=True)
+
+    def _health(self) -> None:
+        import psycopg  # type: ignore[import-not-found]
+
+        try:
+            with (
+                psycopg.connect(self.server.dsn) as connection,
+                connection.cursor() as cursor,
+            ):
+                cursor.execute("SELECT 1")
+                cursor.fetchone()
+        except psycopg.Error:
+            self._json(
+                HTTPStatus.SERVICE_UNAVAILABLE,
+                {"ok": False, "schema_version": QUERY_SCHEMA},
+            )
+            return
+        self._json(HTTPStatus.OK, {"ok": True, "schema_version": QUERY_SCHEMA})
+
+    def _latest(
+        self,
+        contour_id: str,
+        agent_id: str,
+        *,
+        max_age_seconds: int,
+    ) -> None:
+        import psycopg  # type: ignore[import-not-found]
+
+        if (
+            SAFE_IDENTIFIER.fullmatch(contour_id) is None
+            or SAFE_IDENTIFIER.fullmatch(agent_id) is None
+        ):
+            self._json(HTTPStatus.BAD_REQUEST, {"detail": "invalid identifier"})
+            return
+        try:
+            with (
+                psycopg.connect(self.server.dsn) as connection,
+                connection.cursor() as cursor,
+            ):
+                cursor.execute(
+                    """
+                    SELECT DISTINCT ON (kind, measurement, series_key)
+                        observed_at, ingested_at, node_id, kind, measurement,
+                        series_key, source_schema, lab_id, run_id, request_id,
+                        frame_index, payload
+                    FROM contour_telemetry_samples
+                    WHERE contour_id = %s
+                      AND agent_id = %s
+                      AND observed_at >= NOW() - (%s * INTERVAL '1 second')
+                    ORDER BY kind, measurement, series_key, observed_at DESC
+                    """,
+                    (contour_id, agent_id, max_age_seconds),
+                )
+                rows = cursor.fetchall()
+        except psycopg.Error:
+            self._json(
+                HTTPStatus.SERVICE_UNAVAILABLE,
+                {"detail": "telemetry database unavailable"},
+            )
+            return
+        samples = [
+            {
+                "observed_at_utc": row[0].astimezone(UTC).isoformat().replace("+00:00", "Z"),
+                "ingested_at_utc": row[1].astimezone(UTC).isoformat().replace("+00:00", "Z"),
+                "node_id": row[2],
+                "kind": row[3],
+                "measurement": row[4],
+                "series_key": row[5],
+                "source_schema": row[6],
+                "lab_id": row[7],
+                "run_id": row[8],
+                "request_id": row[9],
+                "frame_index": row[10],
+                "payload": row[11],
+            }
+            for row in rows
+        ]
+        self._json(
+            HTTPStatus.OK,
+            {
+                "schema_version": QUERY_SCHEMA,
+                "contour_id": contour_id,
+                "agent_id": agent_id,
+                "samples": samples,
+            },
+        )
+
+    def _json(self, status: HTTPStatus, document: dict[str, object]) -> None:
+        body = json.dumps(
+            document,
+            ensure_ascii=False,
+            separators=(",", ":"),
+        ).encode("utf-8")
+        self.send_response(status.value)
+        self.send_header("Content-Type", "application/json; charset=utf-8")
+        self.send_header("Content-Length", str(len(body)))
+        self.end_headers()
+        self.wfile.write(body)
+
+
+def _start_query_server(dsn: str) -> ThreadingHTTPServer:
+    host = os.environ.get("MISSIONCORE_QUERY_HOST", "0.0.0.0")
+    port = int(os.environ.get("MISSIONCORE_QUERY_PORT", "18030"))
+    server = TelemetryQueryServer((host, port), dsn)
+    thread = threading.Thread(
+        target=server.serve_forever,
+        name="telemetry-query",
+        daemon=True,
+    )
+    thread.start()
+    return server
+
+
+def main() -> None:
+    import paho.mqtt.client as mqtt
+    import psycopg  # type: ignore[import-not-found]
+    from paho.mqtt import MQTTException
+    from paho.mqtt.enums import CallbackAPIVersion
+
+    dsn = _required("MISSIONCORE_DATABASE_DSN")
+    host = _required("MISSIONCORE_MQTT_HOST")
+    port = int(os.environ.get("MISSIONCORE_MQTT_PORT", "1883"))
+    username = _required("MISSIONCORE_MQTT_USERNAME")
+    password = _required("MISSIONCORE_MQTT_PASSWORD")
+    _start_query_server(dsn)
+    connection = psycopg.connect(dsn, autocommit=True)
+    client = mqtt.Client(
+        callback_api_version=CallbackAPIVersion.VERSION2,
+        client_id="ndc-mission-core-telemetry-normalizer",
+        clean_session=False,
+    )
+    client.username_pw_set(username, password)
+
+    def on_connect(
+        connected_client: Any,
+        _userdata: object,
+        _flags: Any,
+        reason_code: Any,
+        _properties: Any,
+    ) -> None:
+        if reason_code.is_failure:
+            raise RuntimeError(f"MQTT connection rejected: {reason_code}")
+        connected_client.subscribe(TOPIC, qos=1)
+
+    def on_message(_client: Any, _userdata: object, message: Any) -> None:
+        try:
+            row = _normalize(message.topic, message.payload)
+            with connection.cursor() as cursor:
+                cursor.execute(
+                    """
+                    INSERT INTO contour_telemetry_samples (
+                        observed_at, contour_id, agent_id, node_id, kind, measurement,
+                        series_key, source_schema, source_topic, lab_id, run_id,
+                        request_id, frame_index, payload
+                    )
+                    VALUES (
+                        %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s,
+                        %s::jsonb
+                    )
+                    ON CONFLICT (
+                        observed_at, contour_id, agent_id, kind, measurement, series_key
+                    )
+                    DO UPDATE SET
+                        ingested_at = NOW(),
+                        node_id = EXCLUDED.node_id,
+                        series_key = EXCLUDED.series_key,
+                        source_schema = EXCLUDED.source_schema,
+                        source_topic = EXCLUDED.source_topic,
+                        lab_id = EXCLUDED.lab_id,
+                        run_id = EXCLUDED.run_id,
+                        request_id = EXCLUDED.request_id,
+                        frame_index = EXCLUDED.frame_index,
+                        payload = CASE
+                            WHEN contour_telemetry_samples.source_schema = %s
+                             AND EXCLUDED.source_schema = %s
+                            THEN EXCLUDED.payload || jsonb_build_object(
+                                'fields',
+                                COALESCE(
+                                    contour_telemetry_samples.payload -> 'fields',
+                                    '{}'::jsonb
+                                ) || COALESCE(
+                                    EXCLUDED.payload -> 'fields',
+                                    '{}'::jsonb
+                                )
+                            )
+                            ELSE EXCLUDED.payload
+                        END
+                    """,
+                    (*row, TELEGRAF_SCHEMA, TELEGRAF_SCHEMA),
+                )
+        except (ValueError, UnicodeDecodeError, json.JSONDecodeError, psycopg.Error) as exc:
+            print(f"telemetry sample rejected: {exc}", flush=True)
+
+    client.on_connect = on_connect
+    client.on_message = on_message
+    while True:
+        try:
+            client.connect(host, port, keepalive=30)
+            client.loop_forever(retry_first_connection=True)
+        except (OSError, MQTTException, psycopg.Error) as exc:
+            print(f"telemetry normalizer reconnecting: {exc}", flush=True)
+            time.sleep(3)
+
+
+if __name__ == "__main__":
+    main()
diff --git a/deploy/telemetry-plane/prepare.py b/deploy/telemetry-plane/prepare.py
new file mode 100644
index 0000000..f71a63d
--- /dev/null
+++ b/deploy/telemetry-plane/prepare.py
@@ -0,0 +1,130 @@
+from __future__ import annotations
+
+import argparse
+import ipaddress
+import os
+import secrets
+import subprocess
+from pathlib import Path
+from typing import Final
+
+ROOT: Final = Path(__file__).resolve().parent
+ENV_PATH: Final = ROOT / ".env"
+RUNTIME: Final = ROOT / "runtime" / "mosquitto"
+IMAGE: Final = "eclipse-mosquitto:2.1.2-alpine"
+PLACEHOLDER: Final = "replace-with-"
+
+
+def _initialize_environment(bind_address: str, *, overwrite: bool = False) -> None:
+    if ENV_PATH.exists() and not overwrite:
+        raise RuntimeError(".env already exists; refusing to overwrite local credentials")
+    normalized_bind_address = str(ipaddress.ip_address(bind_address))
+    values = {
+        "MISSIONCORE_MQTT_BIND_ADDRESS": normalized_bind_address,
+        "MISSIONCORE_MQTT_PORT": "1883",
+        "MISSIONCORE_TELEMETRY_QUERY_PORT": "18030",
+        "MISSIONCORE_DB_NAME": "missioncore_telemetry",
+        "MISSIONCORE_DB_USER": "missioncore_ingest",
+        "MISSIONCORE_DB_PASSWORD": secrets.token_urlsafe(36),
+        "MISSIONCORE_MQTT_INGEST_USER": "missioncore-ingest",
+        "MISSIONCORE_MQTT_INGEST_PASSWORD": secrets.token_urlsafe(36),
+        "MISSIONCORE_MQTT_WORKER_006_USER": "worker-006",
+        "MISSIONCORE_MQTT_WORKER_006_PASSWORD": secrets.token_urlsafe(36),
+    }
+    ENV_PATH.write_text(
+        "".join(f"{name}={value}\n" for name, value in values.items()),
+        encoding="utf-8",
+    )
+    os.chmod(ENV_PATH, 0o600)
+
+
+def _environment() -> dict[str, str]:
+    if not ENV_PATH.is_file():
+        raise RuntimeError("copy .env.example to .env and set unique secrets first")
+    values: dict[str, str] = {}
+    for raw_line in ENV_PATH.read_text(encoding="utf-8").splitlines():
+        line = raw_line.strip()
+        if not line or line.startswith("#") or "=" not in line:
+            continue
+        name, value = line.split("=", 1)
+        values[name.strip()] = value.strip()
+    return values
+
+
+def _required(values: dict[str, str], name: str) -> str:
+    value = values.get(name, "")
+    if not value or value.startswith(PLACEHOLDER):
+        raise RuntimeError(f"{name} must contain a non-placeholder value")
+    return value
+
+
+def _password_entry(path: Path, username: str, password: str, *, create: bool) -> None:
+    command = [
+        "docker",
+        "run",
+        "--rm",
+        "-i",
+        "-v",
+        f"{RUNTIME}:/out",
+        IMAGE,
+        "mosquitto_passwd",
+    ]
+    if create:
+        command.append("-c")
+    command.extend([f"/out/{path.name}", username])
+    subprocess.run(
+        command,
+        check=True,
+        input=f"{password}\n{password}\n",
+        text=True,
+    )
+
+
+def main() -> None:
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        "--initialize",
+        action="store_true",
+        help="create a private .env with generated local credentials",
+    )
+    parser.add_argument(
+        "--mqtt-bind-address",
+        default="127.0.0.1",
+        help="host IP exposed to telemetry agents",
+    )
+    arguments = parser.parse_args()
+    if arguments.initialize:
+        _initialize_environment(arguments.mqtt_bind_address)
+    values = _environment()
+    ingest_user = _required(values, "MISSIONCORE_MQTT_INGEST_USER")
+    ingest_password = _required(values, "MISSIONCORE_MQTT_INGEST_PASSWORD")
+    worker_user = _required(values, "MISSIONCORE_MQTT_WORKER_006_USER")
+    worker_password = _required(values, "MISSIONCORE_MQTT_WORKER_006_PASSWORD")
+    _required(values, "MISSIONCORE_DB_PASSWORD")
+
+    RUNTIME.mkdir(parents=True, exist_ok=True)
+    password_path = RUNTIME / "passwords"
+    _password_entry(password_path, ingest_user, ingest_password, create=True)
+    _password_entry(password_path, worker_user, worker_password, create=False)
+    acl_path = RUNTIME / "acl"
+    acl_path.write_text(
+        "\n".join(
+            [
+                f"user {ingest_user}",
+                "topic read mission-core/v1/contours/+/agents/+/+",
+                "topic read $SYS/broker/uptime",
+                "",
+                "# Agent username must equal its stable agent id.",
+                "pattern write mission-core/v1/contours/+/agents/%u/+",
+                "",
+            ]
+        ),
+        encoding="utf-8",
+    )
+    os.chmod(password_path, 0o600)
+    os.chmod(acl_path, 0o600)
+    print("Mosquitto password and ACL files prepared.", flush=True)
+
+
+if __name__ == "__main__":
+    main()
diff --git a/deploy/telemetry-plane/telegraf/Install-NdcMissionCoreTelegraf.ps1 b/deploy/telemetry-plane/telegraf/Install-NdcMissionCoreTelegraf.ps1
new file mode 100644
index 0000000..f3eb3b3
--- /dev/null
+++ b/deploy/telemetry-plane/telegraf/Install-NdcMissionCoreTelegraf.ps1
@@ -0,0 +1,120 @@
+[CmdletBinding()]
+param(
+    [string]$Version = "1.38.4",
+    [string]$ExpectedSha256 = "6c7878ec319471ac85b82443baec2f3fa5dbcf1b6e2da5d5cd2cbb60fff2bb45",
+    [string]$ConfigurationTemplate = "$PSScriptRoot\mission-core-windows.conf.tmpl"
+)
+
+$ErrorActionPreference = "Stop"
+$serviceName = "telegraf"
+$installRoot = "C:\Program Files\NDC\Mission Core\Telegraf"
+$configurationRoot = "C:\ProgramData\NDC\MissionCore\telemetry-agent"
+$configurationPath = Join-Path $configurationRoot "telegraf.conf"
+$archiveUrl = "https://dl.influxdata.com/telegraf/releases/telegraf-$($Version)_windows_amd64.zip"
+$payload = [Console]::In.ReadToEnd() | ConvertFrom-Json
+
+foreach ($name in @(
+    "MISSIONCORE_CONTOUR_ID",
+    "MISSIONCORE_AGENT_ID",
+    "MISSIONCORE_NODE_ID",
+    "MISSIONCORE_MQTT_HOST",
+    "MISSIONCORE_MQTT_PORT",
+    "MISSIONCORE_MQTT_USERNAME",
+    "MISSIONCORE_MQTT_PASSWORD"
+)) {
+    $value = $payload.$name
+    if (-not $value) {
+        throw "Provisioning payload is missing $name"
+    }
+    Set-Item -Path "Env:$name" -Value ([string]$value)
+}
+
+if (Get-Service -Name $serviceName -ErrorAction SilentlyContinue) {
+    throw "Service '$serviceName' already exists; refusing an implicit replacement"
+}
+if (-not (Test-Path -LiteralPath $ConfigurationTemplate -PathType Leaf)) {
+    throw "Configuration template not found: $ConfigurationTemplate"
+}
+
+$temporaryRoot = Join-Path $env:TEMP "ndc-mission-core-telegraf-$([Guid]::NewGuid().ToString('N'))"
+$archivePath = Join-Path $temporaryRoot "telegraf.zip"
+$expandedRoot = Join-Path $temporaryRoot "expanded"
+try {
+    New-Item -ItemType Directory -Path $temporaryRoot, $expandedRoot -Force | Out-Null
+    Invoke-WebRequest -UseBasicParsing -Uri $archiveUrl -OutFile $archivePath
+    $actualSha256 = (Get-FileHash -LiteralPath $archivePath -Algorithm SHA256).Hash.ToLowerInvariant()
+    if ($actualSha256 -ne $ExpectedSha256.ToLowerInvariant()) {
+        throw "Telegraf archive SHA256 mismatch"
+    }
+    Expand-Archive -LiteralPath $archivePath -DestinationPath $expandedRoot
+    $sourceExecutable = Get-ChildItem -Path $expandedRoot -Filter "telegraf.exe" -Recurse |
+        Select-Object -First 1
+    if (-not $sourceExecutable) {
+        throw "telegraf.exe is missing from the verified archive"
+    }
+
+    New-Item -ItemType Directory -Path $installRoot, $configurationRoot -Force | Out-Null
+    Copy-Item -LiteralPath $sourceExecutable.FullName -Destination (Join-Path $installRoot "telegraf.exe")
+    Copy-Item -LiteralPath $ConfigurationTemplate -Destination $configurationPath
+    & icacls.exe $configurationRoot /inheritance:r /grant:r `
+        "*S-1-5-18:(OI)(CI)F" "*S-1-5-32-544:(OI)(CI)F" | Out-Null
+    if ($LASTEXITCODE -ne 0) {
+        throw "Failed to restrict the telemetry agent configuration directory"
+    }
+
+    $executable = Join-Path $installRoot "telegraf.exe"
+    $validationOutput = Join-Path $temporaryRoot "validation.out.log"
+    $validationError = Join-Path $temporaryRoot "validation.error.log"
+    $validation = Start-Process -FilePath $executable `
+        -ArgumentList @("--config", $configurationPath, "--test") `
+        -NoNewWindow -Wait -PassThru `
+        -RedirectStandardOutput $validationOutput `
+        -RedirectStandardError $validationError
+    if ($validation.ExitCode -ne 0) {
+        $validationDetail = Get-Content -LiteralPath $validationError -Tail 8 |
+            Out-String
+        throw "Telegraf configuration validation failed: $validationDetail"
+    }
+
+    & $executable --service install --config $configurationPath
+    if ($LASTEXITCODE -ne 0) {
+        throw "Telegraf service installation failed"
+    }
+    $serviceEnvironment = @(
+        "MISSIONCORE_CONTOUR_ID=$($payload.MISSIONCORE_CONTOUR_ID)",
+        "MISSIONCORE_AGENT_ID=$($payload.MISSIONCORE_AGENT_ID)",
+        "MISSIONCORE_NODE_ID=$($payload.MISSIONCORE_NODE_ID)",
+        "MISSIONCORE_MQTT_HOST=$($payload.MISSIONCORE_MQTT_HOST)",
+        "MISSIONCORE_MQTT_PORT=$($payload.MISSIONCORE_MQTT_PORT)",
+        "MISSIONCORE_MQTT_USERNAME=$($payload.MISSIONCORE_MQTT_USERNAME)",
+        "MISSIONCORE_MQTT_PASSWORD=$($payload.MISSIONCORE_MQTT_PASSWORD)"
+    )
+    $serviceRegistryPath = "HKLM:\SYSTEM\CurrentControlSet\Services\$serviceName"
+    Set-ItemProperty -Path $serviceRegistryPath -Name Environment `
+        -Type MultiString -Value $serviceEnvironment
+    Set-ItemProperty -Path $serviceRegistryPath -Name DisplayName `
+        -Value "NDC Mission Core Telemetry Agent"
+    & sc.exe config $serviceName DisplayName= "NDC Mission Core Telemetry Agent" | Out-Null
+    if ($LASTEXITCODE -ne 0) {
+        throw "Failed to apply the NDC service display name"
+    }
+    Set-Service -Name $serviceName -StartupType Automatic
+    Start-Service -Name $serviceName
+    $service = Get-Service -Name $serviceName
+    $service.WaitForStatus([ServiceProcess.ServiceControllerStatus]::Running, [TimeSpan]::FromSeconds(20))
+
+    [ordered]@{
+        SchemaVersion = "missioncore.telemetry-agent-install-result/v1"
+        Agent = "Telegraf"
+        Version = $Version
+        ServiceName = $service.Name
+        DisplayName = $service.DisplayName
+        Status = $service.Status.ToString()
+        StartType = $service.StartType.ToString()
+        Configuration = $configurationPath
+        Sha256 = $actualSha256
+    } | ConvertTo-Json -Compress
+}
+finally {
+    Remove-Item -LiteralPath $temporaryRoot -Recurse -Force -ErrorAction SilentlyContinue
+}
diff --git a/deploy/telemetry-plane/telegraf/Update-NdcMissionCoreTelegraf.ps1 b/deploy/telemetry-plane/telegraf/Update-NdcMissionCoreTelegraf.ps1
new file mode 100644
index 0000000..3ed5a5b
--- /dev/null
+++ b/deploy/telemetry-plane/telegraf/Update-NdcMissionCoreTelegraf.ps1
@@ -0,0 +1,75 @@
+[CmdletBinding()]
+param(
+    [Parameter(Mandatory = $true)]
+    [string]$ConfigurationTemplate
+)
+
+$ErrorActionPreference = "Stop"
+$serviceName = "telegraf"
+$installRoot = "C:\Program Files\NDC\Mission Core\Telegraf"
+$configurationRoot = "C:\ProgramData\NDC\MissionCore\telemetry-agent"
+$configurationPath = Join-Path $configurationRoot "telegraf.conf"
+$executable = Join-Path $installRoot "telegraf.exe"
+$serviceRegistryPath = "HKLM:\SYSTEM\CurrentControlSet\Services\$serviceName"
+
+$service = Get-Service -Name $serviceName -ErrorAction Stop
+if (-not (Test-Path -LiteralPath $executable -PathType Leaf)) {
+    throw "NDC Mission Core Telegraf executable is missing"
+}
+if (-not (Test-Path -LiteralPath $ConfigurationTemplate -PathType Leaf)) {
+    throw "Configuration template not found: $ConfigurationTemplate"
+}
+
+foreach ($entry in @((Get-ItemProperty -Path $serviceRegistryPath).Environment)) {
+    $name, $value = $entry -split "=", 2
+    if ($name -and $value) {
+        Set-Item -Path "Env:$name" -Value $value
+    }
+}
+
+$temporaryRoot = Join-Path $env:TEMP "ndc-mission-core-telegraf-update-$([Guid]::NewGuid().ToString('N'))"
+$validationOutput = Join-Path $temporaryRoot "validation.out.log"
+$validationError = Join-Path $temporaryRoot "validation.error.log"
+$backupRoot = Join-Path $configurationRoot "backups"
+$backupPath = Join-Path $backupRoot "telegraf-$([DateTime]::UtcNow.ToString('yyyyMMddTHHmmssZ')).conf"
+try {
+    New-Item -ItemType Directory -Path $temporaryRoot, $backupRoot -Force | Out-Null
+    $validation = Start-Process -FilePath $executable `
+        -ArgumentList @("--config", $ConfigurationTemplate, "--test") `
+        -NoNewWindow -Wait -PassThru `
+        -RedirectStandardOutput $validationOutput `
+        -RedirectStandardError $validationError
+    if ($validation.ExitCode -ne 0) {
+        $validationDetail = Get-Content -LiteralPath $validationError -Tail 8 |
+            Out-String
+        throw "Telegraf configuration validation failed: $validationDetail"
+    }
+
+    Copy-Item -LiteralPath $configurationPath -Destination $backupPath
+    Stop-Service -Name $serviceName
+    try {
+        Copy-Item -LiteralPath $ConfigurationTemplate -Destination $configurationPath
+        Start-Service -Name $serviceName
+        $service = Get-Service -Name $serviceName
+        $service.WaitForStatus(
+            [ServiceProcess.ServiceControllerStatus]::Running,
+            [TimeSpan]::FromSeconds(20)
+        )
+    }
+    catch {
+        Copy-Item -LiteralPath $backupPath -Destination $configurationPath
+        Start-Service -Name $serviceName
+        throw
+    }
+
+    [ordered]@{
+        SchemaVersion = "missioncore.telemetry-agent-config-result/v1"
+        ServiceName = $serviceName
+        Status = (Get-Service -Name $serviceName).Status.ToString()
+        Configuration = $configurationPath
+        Backup = $backupPath
+    } | ConvertTo-Json -Compress
+}
+finally {
+    Remove-Item -LiteralPath $temporaryRoot -Recurse -Force -ErrorAction SilentlyContinue
+}
diff --git a/deploy/telemetry-plane/telegraf/mission-core-linux.conf.tmpl b/deploy/telemetry-plane/telegraf/mission-core-linux.conf.tmpl
new file mode 100644
index 0000000..8001796
--- /dev/null
+++ b/deploy/telemetry-plane/telegraf/mission-core-linux.conf.tmpl
@@ -0,0 +1,35 @@
+[agent]
+  interval = "2s"
+  round_interval = true
+  omit_hostname = false
+
+[global_tags]
+  node_id = "${MISSIONCORE_NODE_ID}"
+  contour_id = "${MISSIONCORE_CONTOUR_ID}"
+  agent_id = "${MISSIONCORE_AGENT_ID}"
+
+[[inputs.cpu]]
+  percpu = false
+  totalcpu = true
+  report_active = true
+
+[[inputs.mem]]
+[[inputs.disk]]
+  ignore_fs = ["tmpfs", "devtmpfs", "devfs"]
+[[inputs.net]]
+[[inputs.system]]
+[[inputs.nvidia_smi]]
+
+[[inputs.docker]]
+  endpoint = "unix:///var/run/docker.sock"
+  container_name_include = []
+  total = true
+
+[[outputs.mqtt]]
+  servers = ["tcp://${MISSIONCORE_MQTT_HOST}:${MISSIONCORE_MQTT_PORT}"]
+  topic = "mission-core/v1/contours/${MISSIONCORE_CONTOUR_ID}/agents/${MISSIONCORE_AGENT_ID}/host"
+  username = "${MISSIONCORE_MQTT_USERNAME}"
+  password = "${MISSIONCORE_MQTT_PASSWORD}"
+  qos = 1
+  data_format = "json"
+  json_timestamp_units = "1s"
diff --git a/deploy/telemetry-plane/telegraf/mission-core-windows.conf.tmpl b/deploy/telemetry-plane/telegraf/mission-core-windows.conf.tmpl
new file mode 100644
index 0000000..6155f17
--- /dev/null
+++ b/deploy/telemetry-plane/telegraf/mission-core-windows.conf.tmpl
@@ -0,0 +1,57 @@
+[agent]
+  interval = "2s"
+  round_interval = true
+  omit_hostname = false
+
+[global_tags]
+  node_id = "${MISSIONCORE_NODE_ID}"
+  contour_id = "${MISSIONCORE_CONTOUR_ID}"
+  agent_id = "${MISSIONCORE_AGENT_ID}"
+
+[[inputs.cpu]]
+  percpu = false
+  totalcpu = true
+  report_active = true
+
+[[inputs.mem]]
+[[inputs.system]]
+[[inputs.disk]]
+  ignore_fs = ["tmpfs", "devtmpfs", "devfs"]
+[[inputs.net]]
+[[inputs.win_perf_counters]]
+  [[inputs.win_perf_counters.object]]
+    ObjectName = "System"
+    Counters = ["System Up Time"]
+    Instances = ["------"]
+    Measurement = "win_system"
+
+[[inputs.nvidia_smi]]
+
+[[inputs.docker]]
+  endpoint = "npipe:////./pipe/docker_engine"
+  container_name_include = []
+
+[[inputs.http_response]]
+  urls = ["http://127.0.0.1:8000/v2/health/ready"]
+  response_timeout = "2s"
+  response_status_code = 200
+  name_override = "missioncore_triton_health"
+
+[[inputs.prometheus]]
+  urls = ["http://127.0.0.1:8002/metrics"]
+  metric_version = 1
+  response_timeout = "2s"
+  namepass = [
+    "nv_inference_request_success",
+    "nv_inference_request_failure",
+    "nv_inference_count",
+  ]
+
+[[outputs.mqtt]]
+  servers = ["tcp://${MISSIONCORE_MQTT_HOST}:${MISSIONCORE_MQTT_PORT}"]
+  topic = "mission-core/v1/contours/${MISSIONCORE_CONTOUR_ID}/agents/${MISSIONCORE_AGENT_ID}/host"
+  username = "${MISSIONCORE_MQTT_USERNAME}"
+  password = "${MISSIONCORE_MQTT_PASSWORD}"
+  qos = 1
+  data_format = "json"
+  json_timestamp_units = "1s"
diff --git a/deploy/telemetry-plane/timescale/001_telemetry.sql b/deploy/telemetry-plane/timescale/001_telemetry.sql
new file mode 100644
index 0000000..a36082d
--- /dev/null
+++ b/deploy/telemetry-plane/timescale/001_telemetry.sql
@@ -0,0 +1,43 @@
+CREATE EXTENSION IF NOT EXISTS timescaledb;
+
+CREATE TABLE IF NOT EXISTS contour_telemetry_samples (
+    observed_at TIMESTAMPTZ NOT NULL,
+    ingested_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    contour_id TEXT NOT NULL,
+    agent_id TEXT NOT NULL,
+    node_id TEXT NOT NULL,
+    kind TEXT NOT NULL,
+    measurement TEXT NOT NULL,
+    series_key TEXT NOT NULL DEFAULT '',
+    source_schema TEXT NOT NULL,
+    source_topic TEXT NOT NULL,
+    lab_id TEXT,
+    run_id TEXT,
+    request_id TEXT,
+    frame_index BIGINT,
+    payload JSONB NOT NULL,
+    PRIMARY KEY (
+        observed_at,
+        contour_id,
+        agent_id,
+        kind,
+        measurement,
+        series_key
+    )
+);
+
+SELECT create_hypertable(
+    'contour_telemetry_samples',
+    by_range('observed_at'),
+    if_not_exists => TRUE
+);
+
+CREATE INDEX IF NOT EXISTS contour_telemetry_latest_idx
+    ON contour_telemetry_samples (
+        contour_id,
+        agent_id,
+        kind,
+        measurement,
+        series_key,
+        observed_at DESC
+    );
diff --git a/docs/adr/0031-local-compute-contour-telemetry-plane.md b/docs/adr/0031-local-compute-contour-telemetry-plane.md
new file mode 100644
index 0000000..8c1d5a7
--- /dev/null
+++ b/docs/adr/0031-local-compute-contour-telemetry-plane.md
@@ -0,0 +1,193 @@
+# ADR 0031 — Local compute contour telemetry plane
+
+Status: accepted for implementation
+Date: 2026-07-27
+
+## Implementation status
+
+The first local contour is active:
+
+- Worker 006 publishes through the native Windows service
+  `NDC Mission Core Telemetry Agent` (Telegraf);
+- MQTT, normalization and storage run as the single Compose project
+  `ndc-mission-core-telemetry`;
+- the normalizer exposes the read-only product adapter only on
+  `127.0.0.1:18030`;
+- Mission Core on canonical port `8000` uses this adapter for live System
+  telemetry and reports the source as `agent-mqtt`;
+- SSH is retained only for explicit profile diagnostics and bootstrap checks.
+
+The existing Worker 006 containers were renamed in place to
+`ndc-mission-core-triton` and `ndc-mission-core-perception-worker`. Their
+container identities were preserved, so this namespace migration did not restart the
+inference or perception runtimes.
+
+## Decision
+
+Mission Core treats a compute worker as a configurable **local compute contour**, not as
+one hard-coded workstation.
+
+The portable telemetry path is:
+
+```text
+Telegraf agent
+    -> authenticated MQTT
+    -> Eclipse Mosquitto
+    -> Mission Core telemetry normalizer
+    -> TimescaleDB OSS
+    -> Mission Core System API
+    -> product workspaces
+```
+
+The broker, normalizer and telemetry database form one Docker Compose contour named
+`ndc-mission-core-telemetry`. They remain separate containers so each process has an
+independent healthcheck, least-privilege boundary, lifecycle and rollback path. This is
+one operator-managed stack, not one multi-process container.
+
+The Telegraf agent runs as a native host service. On Worker 006 this is required for
+portable access to Windows performance counters, Docker Desktop and NVIDIA telemetry.
+Putting it into the Linux Docker Desktop VM would make the agent less universal and
+would hide part of the host it is meant to observe.
+
+The direct SSH/PowerShell probe remains a bounded bootstrap and diagnostic fallback for
+the existing Worker 006 profile. It is not the target live telemetry transport.
+
+## Why these components
+
+- **Telegraf** is the universal host agent. It already supports Windows and Linux host
+  counters, Docker, NVIDIA SMI, network counters and custom HTTP/Prometheus inputs.
+  Hardware discovery does not belong in a custom Mission Core agent.
+- **Eclipse Mosquitto** is the local, fully open-source broker. It separates worker
+  lifecycle and network location from the Mission Core UI.
+- **Mission Core telemetry normalizer** owns only product semantics: contour identity,
+  runtime ownership, LAB/run identity and processing-stage names. These concepts cannot
+  be delegated to a generic hardware agent.
+- **TimescaleDB OSS** stores normalized samples and permits comparison between laboratory
+  runs without coupling agents to database credentials or schema.
+
+Only the broker and normalizer know the MQTT credentials. Agents receive a scoped
+publisher identity. The UI never receives broker or database credentials.
+
+## Product surface brief
+
+### User job
+
+An operator must be able to carry Mission Core and a worker to another local network,
+register one or more compute contours, install the standard telemetry agent, select the
+active contour and inspect its hardware, processing and network state.
+
+### Placement
+
+- The `Система` left panel is a contour selector.
+- A canonical plus action in its header creates another contour configuration.
+- System workspace modes (`Вычислительные модули`, `Интеграции`, `Сеть`,
+  `Журнал и аудит`) live in the content header because they describe the selected
+  contour.
+- A canonical settings utility action opens settings for the selected contour.
+- Global Mission Core settings remain in the profile menu and do not mix with contour
+  settings.
+
+Rejected placements:
+
+- keeping the single `Worker 006` as a permanent page identity;
+- placing contour settings in a global `Система / Настройки` workspace;
+- creating one bespoke page layout per worker;
+- placing installation instructions directly in the telemetry dashboard.
+
+### State grammar
+
+- `unconfigured`: contour exists but no agent transport is configured;
+- `provisioning`: bootstrap material was issued but the agent has not published a sample;
+- `online`: a fresh normalized sample matches the expected node identity;
+- `stale`: the last valid sample is older than the freshness window;
+- `identity-mismatch`: an agent published with a different node identity;
+- `offline`: the contour was configured but no current sample is available;
+- `legacy-diagnostic`: the UI is temporarily backed by the direct SSH probe.
+
+The UI must name the evidence source. It must not call an SSH snapshot “live agent
+telemetry”.
+
+### Evidence contract
+
+Each normalized sample carries:
+
+- `contour_id`, `node_id`, `agent_id`, `observed_at_utc`;
+- source and normalizer schema versions;
+- hardware, runtime, network and pipeline measurements;
+- optional `lab_id`, `run_id`, `request_id` and frame index;
+- ingestion timestamp and source topic.
+
+Unknown measurements remain `null`; they are never synthesized for presentation.
+
+Several Telegraf measurements can have the same name and timestamp but belong to
+different disks, interfaces, containers or GPU processes. Storage therefore keys a
+sample by a stable `series_key` derived from its distinguishing source tags. When a
+legacy Telegraf input emits one logical series as several field fragments, the
+normalizer merges those fields on conflict instead of replacing an earlier fragment.
+This preserves series identity without leaking source-specific tag grammar into the
+product API.
+
+## Deployment boundary
+
+The first stack runs inside one trusted local network and binds only to explicitly
+configured LAN interfaces. Mosquitto uses password authentication and ACLs; anonymous
+access is forbidden. TimescaleDB is not exposed outside the compose network.
+
+All NODE.DC-owned Docker containers, networks and named volumes use a lowercase `ndc-`
+prefix. The concrete telemetry objects are:
+
+- `ndc-mission-core-mqtt-broker`;
+- `ndc-mission-core-telemetry-normalizer`;
+- `ndc-mission-core-telemetry-timescaledb`;
+- network `ndc-mission-core-telemetry`;
+- volumes `ndc-mission-core-mqtt-data` and
+  `ndc-mission-core-telemetry-timescale-data`.
+
+Vendor image names remain upstream-pinned; the NODE.DC ownership boundary is expressed
+by container names and `com.nodedc.*` labels rather than by retagging third-party
+images.
+
+The durable Worker 006 compute processes follow the same namespace:
+
+- `ndc-mission-core-triton`;
+- `ndc-mission-core-perception-worker`.
+
+Their existing `mission-core-compute` Compose project and network are a documented
+legacy predecessor. Renaming that project would recreate the network shared by the
+persistent perception worker, so it is intentionally deferred to a separate
+availability-reviewed migration rather than hidden inside this container-name change.
+
+The telemetry probe and laboratory PowerShell launchers accept the previous
+`mission-core-*` names only as a bounded migration fallback. They prefer and create the
+`ndc-*` names. Historical report text and explicitly named debug/backup containers are
+evidence, not durable product runtime, and are not rewritten.
+
+The same compose bundle can later move from the operator machine to a NODE.DC server
+without changing agent topics or UI contracts. Internet relay, multi-tenant access and
+remote command authority are out of scope for this decision.
+
+## MQTT topic contract
+
+```text
+mission-core/v1/contours/<contour-id>/agents/<agent-id>/host
+mission-core/v1/contours/<contour-id>/agents/<agent-id>/runtime
+mission-core/v1/contours/<contour-id>/agents/<agent-id>/pipeline
+mission-core/v1/contours/<contour-id>/agents/<agent-id>/heartbeat
+```
+
+Agents may publish only below their own contour and agent prefix. The normalizer may
+subscribe to `mission-core/v1/contours/+/agents/+/+`.
+
+## Consequences
+
+- Worker 006 becomes the first contour configuration, not an architectural singleton.
+- Live System telemetry no longer depends on SSH polling. The existing SSH probe is a
+  bounded diagnostic path and can be removed after contour provisioning no longer
+  needs it.
+- Host portability is delegated to Telegraf plugins and configuration templates.
+- Mission Core code stays responsible for product semantics and stable API contracts,
+  not OS-specific metric collection.
+- Host, container, network and inference telemetry is stored in the normalized path.
+  Per-stage LAB processing telemetry remains unavailable until a laboratory worker
+  publishes the native `runtime` and `pipeline` topic contracts; the UI must keep those
+  stages explicitly unavailable rather than infer them from aggregate hardware load.
diff --git a/tests/test_telemetry_normalizer_contract.py b/tests/test_telemetry_normalizer_contract.py
new file mode 100644
index 0000000..1ea7c25
--- /dev/null
+++ b/tests/test_telemetry_normalizer_contract.py
@@ -0,0 +1,164 @@
+from __future__ import annotations
+
+import importlib.util
+import json
+from datetime import UTC, datetime
+from pathlib import Path
+from types import ModuleType
+
+import pytest
+import yaml
+
+REPOSITORY_ROOT = Path(__file__).resolve().parents[1]
+NORMALIZER_PATH = (
+    REPOSITORY_ROOT
+    / "deploy"
+    / "telemetry-plane"
+    / "normalizer"
+    / "normalizer.py"
+)
+COMPOSE_PATH = REPOSITORY_ROOT / "deploy" / "telemetry-plane" / "compose.yaml"
+NORMALIZER_SOURCE = NORMALIZER_PATH.read_text(encoding="utf-8")
+
+
+def _normalizer() -> ModuleType:
+    spec = importlib.util.spec_from_file_location(
+        "missioncore_telemetry_normalizer",
+        NORMALIZER_PATH,
+    )
+    assert spec is not None and spec.loader is not None
+    module = importlib.util.module_from_spec(spec)
+    spec.loader.exec_module(module)
+    return module
+
+
+def test_normalizer_accepts_native_telegraf_host_metric() -> None:
+    normalizer = _normalizer()
+    payload = json.dumps(
+        {
+            "name": "cpu",
+            "tags": {
+                "node_id": "DESKTOP-OPJ8J04",
+                "host": "DESKTOP-OPJ8J04",
+                "contour_id": "worker-006",
+                "agent_id": "worker-006",
+            },
+            "fields": {"usage_active": 12.5},
+            "timestamp": 1_785_179_600,
+        }
+    ).encode()
+
+    row = normalizer._normalize(
+        "mission-core/v1/contours/worker-006/agents/worker-006/host",
+        payload,
+    )
+
+    assert row[0] == datetime.fromtimestamp(1_785_179_600, tz=UTC)
+    assert row[1:5] == ("worker-006", "worker-006", "DESKTOP-OPJ8J04", "host")
+    assert row[5] == "cpu"
+    assert row[6] == "{}"
+    assert row[7] == "telegraf.metric-json/v1"
+
+
+def test_normalizer_keeps_same_timestamp_host_measurements_distinct() -> None:
+    normalizer = _normalizer()
+    rows = [
+        normalizer._normalize(
+            "mission-core/v1/contours/worker-006/agents/worker-006/host",
+            json.dumps(
+                {
+                    "name": name,
+                    "tags": {
+                        "node_id": "DESKTOP-OPJ8J04",
+                        "contour_id": "worker-006",
+                        "agent_id": "worker-006",
+                    },
+                    "fields": fields,
+                    "timestamp": 1_785_179_600,
+                }
+            ).encode(),
+        )
+        for name, fields in (
+            ("cpu", {"usage_active": 12.5}),
+            ("mem", {"used_percent": 43.2}),
+        )
+    ]
+
+    assert rows[0][0] == rows[1][0]
+    assert rows[0][5] == "cpu"
+    assert rows[1][5] == "mem"
+    assert rows[0][:5] == rows[1][:5]
+
+
+def test_normalizer_keeps_same_measurement_series_distinct() -> None:
+    normalizer = _normalizer()
+    rows = [
+        normalizer._normalize(
+            "mission-core/v1/contours/worker-006/agents/worker-006/host",
+            json.dumps(
+                {
+                    "name": "net",
+                    "tags": {
+                        "node_id": "DESKTOP-OPJ8J04",
+                        "contour_id": "worker-006",
+                        "agent_id": "worker-006",
+                        "interface": interface,
+                    },
+                    "fields": {"bytes_recv": received},
+                    "timestamp": 1_785_179_600,
+                }
+            ).encode(),
+        )
+        for interface, received in (("Ethernet", 10), ("Wi-Fi", 20))
+    ]
+
+    assert rows[0][0:6] == rows[1][0:6]
+    assert rows[0][6] == '{"interface":"Ethernet"}'
+    assert rows[1][6] == '{"interface":"Wi-Fi"}'
+
+
+def test_telegraf_upsert_merges_split_fields_in_one_series() -> None:
+    assert "contour_telemetry_samples.payload -> 'fields'" in NORMALIZER_SOURCE
+    assert "EXCLUDED.payload -> 'fields'" in NORMALIZER_SOURCE
+
+
+def test_normalizer_rejects_unschematized_pipeline_payload() -> None:
+    normalizer = _normalizer()
+    with pytest.raises(ValueError, match="schema"):
+        normalizer._normalize(
+            "mission-core/v1/contours/worker-006/agents/worker-006/pipeline",
+            json.dumps(
+                {
+                    "node_id": "DESKTOP-OPJ8J04",
+                    "observed_at_utc": "2026-07-27T12:00:00Z",
+                }
+            ).encode(),
+        )
+
+
+def test_telemetry_plane_uses_the_ndc_docker_namespace() -> None:
+    document = yaml.safe_load(COMPOSE_PATH.read_text(encoding="utf-8"))
+
+    assert document["name"] == "ndc-mission-core-telemetry"
+    services = document["services"]
+    assert {
+        service["container_name"]
+        for service in services.values()
+    } == {
+        "ndc-mission-core-mqtt-broker",
+        "ndc-mission-core-telemetry-normalizer",
+        "ndc-mission-core-telemetry-timescaledb",
+    }
+    for service in services.values():
+        assert service["container_name"].startswith("ndc-")
+        assert service["labels"]["com.nodedc.product"] == "mission-core"
+        assert service["labels"]["com.nodedc.stack"] == "ndc-mission-core-telemetry"
+
+    assert document["networks"]["default"]["name"] == "ndc-mission-core-telemetry"
+    assert {
+        volume["name"]
+        for volume in document["volumes"].values()
+    } == {
+        "ndc-mission-core-mqtt-data",
+        "ndc-mission-core-telemetry-timescale-data",
+    }
diff --git a/tests/test_telemetry_plane_prepare.py b/tests/test_telemetry_plane_prepare.py
new file mode 100644
index 0000000..018f88a
--- /dev/null
+++ b/tests/test_telemetry_plane_prepare.py
@@ -0,0 +1,67 @@
+from __future__ import annotations
+
+import importlib.util
+import stat
+from pathlib import Path
+from types import ModuleType
+
+import pytest
+
+
+def _prepare_module() -> ModuleType:
+    path = (
+        Path(__file__).resolve().parents[1]
+        / "deploy"
+        / "telemetry-plane"
+        / "prepare.py"
+    )
+    specification = importlib.util.spec_from_file_location(
+        "mission_core_telemetry_prepare",
+        path,
+    )
+    assert specification is not None
+    assert specification.loader is not None
+    module = importlib.util.module_from_spec(specification)
+    specification.loader.exec_module(module)
+    return module
+
+
+prepare = _prepare_module()
+
+
+def test_initialize_environment_generates_private_unique_secrets(
+    tmp_path: Path,
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    env_path = tmp_path / ".env"
+    monkeypatch.setattr(prepare, "ENV_PATH", env_path)
+
+    prepare._initialize_environment("192.0.2.15")
+
+    values = dict(
+        line.split("=", 1)
+        for line in env_path.read_text(encoding="utf-8").splitlines()
+    )
+    assert values["MISSIONCORE_MQTT_BIND_ADDRESS"] == "192.0.2.15"
+    secrets = {
+        values["MISSIONCORE_DB_PASSWORD"],
+        values["MISSIONCORE_MQTT_INGEST_PASSWORD"],
+        values["MISSIONCORE_MQTT_WORKER_006_PASSWORD"],
+    }
+    assert len(secrets) == 3
+    assert all(len(secret) >= 40 for secret in secrets)
+    assert stat.S_IMODE(env_path.stat().st_mode) == 0o600
+
+
+def test_initialize_environment_refuses_to_replace_credentials(
+    tmp_path: Path,
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    env_path = tmp_path / ".env"
+    env_path.write_text("existing=true\n", encoding="utf-8")
+    monkeypatch.setattr(prepare, "ENV_PATH", env_path)
+
+    with pytest.raises(RuntimeError, match="refusing to overwrite"):
+        prepare._initialize_environment("127.0.0.1")
+
+    assert env_path.read_text(encoding="utf-8") == "existing=true\n"