diff --git a/src/maref/opc/telemetry_exporter.py b/src/maref/opc/telemetry_exporter.py
new file mode 100644
index 00000000..d125d90a
--- /dev/null
+++ b/src/maref/opc/telemetry_exporter.py
@@ -0,0 +1,245 @@
+from __future__ import annotations
+
+import hashlib
+import hmac
+import json
+import logging
+import os
+import time
+from collections import Counter
+from dataclasses import dataclass, field
+from pathlib import Path
+from typing import Any
+
+logger = logging.getLogger(__name__)
+
+TELEMETRY_VERSION = "1.0"
+_DEFAULT_ENDPOINT = "https://maref.org/api/v1/telemetry/batch"
+
+
+@dataclass
+class TelemetryEntry:
+    id: str
+    timestamp: float
+    event_type: str
+    actor_hash: str
+    action: str
+    metadata: dict[str, Any] = field(default_factory=dict)
+    chain_hash: str = ""
+
+
+@dataclass
+class AggregateReport:
+    deployment_id: str
+    telemetry_version: str = TELEMETRY_VERSION
+    exported_at: float = field(default_factory=time.time)
+    total_entries: int = 0
+    window_hours: float = 0.0
+    fnr: float = 0.0
+    fpr: float = 0.0
+    avg_entropy: float = 0.0
+    state_transition_count: int = 0
+    cb_trip_count: int = 0
+    anomaly_count: int = 0
+    event_type_dist: dict[str, int] = field(default_factory=dict)
+    action_dist: dict[str, int] = field(default_factory=dict)
+    signed_ratio: float = 0.0
+
+
+class TelemetryExporter:
+    def __init__(
+        self,
+        audit_paths: list[Path] | None = None,
+        deployment_id: str | None = None,
+        hmac_secret: str | None = None,
+        endpoint: str = _DEFAULT_ENDPOINT,
+    ):
+        self._audit_paths = audit_paths or [
+            Path("governance_audit.jsonl"),
+            Path("governance_audit_state_machine.jsonl"),
+            Path(".governance/governance_audit.jsonl"),
+            Path(".governance/governance_audit_state_machine.jsonl"),
+        ]
+        self._deployment_id = deployment_id or self._resolve_deployment_id()
+        secret = hmac_secret or os.environ.get("MAREF_TELEMETRY_SECRET") or ""
+        self._hmac_key = secret.encode("utf-8") if secret else b""
+        self._endpoint = endpoint
+
+    @staticmethod
+    def _resolve_deployment_id() -> str:
+        try:
+            result = __import__("subprocess").run(
+                ["git", "config", "--get", "remote.origin.url"],
+                capture_output=True, text=True, timeout=5,
+            )
+            if result.returncode == 0 and result.stdout.strip():
+                return hashlib.sha256(result.stdout.strip().encode()).hexdigest()[:16]
+        except Exception:
+            pass
+        return "unknown-deployment"
+
+    def _hash_actor(self, name: str) -> str:
+        if not self._hmac_key:
+            return hashlib.sha256(name.encode()).hexdigest()[:16]
+        return hmac.new(self._hmac_key, name.encode(), hashlib.sha256).hexdigest()[:16]
+
+    def _read_entries(self, max_entries: int = 5000) -> list[dict[str, Any]]:
+        entries: list[dict[str, Any]] = []
+        for p in self._audit_paths:
+            if not p.exists():
+                continue
+            try:
+                with open(p) as f:
+                    for line in f:
+                        line = line.strip()
+                        if not line:
+                            continue
+                        try:
+                            entries.append(json.loads(line))
+                        except json.JSONDecodeError:
+                            continue
+                        if len(entries) >= max_entries:
+                            break
+            except OSError:
+                continue
+            if len(entries) >= max_entries:
+                break
+        return entries
+
+    def _anonymize_entry(self, raw: dict[str, Any]) -> TelemetryEntry:
+        meta = raw.get("metadata", {}) or {}
+        safe_meta = {
+            k: v for k, v in meta.items()
+            if k not in ("file_path", "data_classification", "details")
+        }
+        return TelemetryEntry(
+            id=raw.get("id", ""),
+            timestamp=raw.get("timestamp", 0.0),
+            event_type=raw.get("event_type", ""),
+            actor_hash=self._hash_actor(raw.get("actor", "")),
+            action=raw.get("action", ""),
+            metadata=safe_meta,
+            chain_hash=raw.get("chain_hash", ""),
+        )
+
+    def build_batch(self, max_entries: int = 5000) -> dict[str, Any]:
+        raw_entries = self._read_entries(max_entries=max_entries)
+        anonymized = [self._anonymize_entry(e) for e in raw_entries]
+
+        report = self._compute_aggregate(raw_entries)
+
+        batch = {
+            "deployment_id": self._deployment_id,
+            "telemetry_version": TELEMETRY_VERSION,
+            "batch_id": f"batch_{int(time.time())}_{len(anonymized)}",
+            "entries": [e.__dict__ for e in anonymized],
+            "aggregate": report.__dict__,
+        }
+
+        if self._hmac_key:
+            payload = json.dumps(batch, sort_keys=True, ensure_ascii=False, default=str)
+            batch["hmac_signature"] = hmac.new(
+                self._hmac_key, payload.encode(), hashlib.sha256
+            ).hexdigest()
+
+        return batch
+
+    def _compute_aggregate(self, entries: list[dict[str, Any]]) -> AggregateReport:
+        if not entries:
+            return AggregateReport(deployment_id=self._deployment_id)
+
+        event_type_dist = dict(Counter(e.get("event_type", "") for e in entries))
+        action_dist = dict(Counter(e.get("action", "") for e in entries))
+
+        time_span = entries[-1].get("timestamp", 0) - entries[0].get("timestamp", 0)
+        window_hours = time_span / 3600.0 if time_span > 0 else 0.0
+
+        block_count = sum(1 for e in entries if e.get("action") in ("BLOCK", "DENY"))
+        recovery_count = sum(
+            1 for e in entries
+            if e.get("event_type") == "circuit_breaker"
+            or "recovery" in e.get("details", "").lower()
+        )
+        fnr = recovery_count / max(block_count + recovery_count, 1)
+
+        allow_count = sum(1 for e in entries if e.get("action") in ("ALLOW", "APPROVE"))
+        anomaly_after_allow = sum(
+            1 for e in entries
+            if e.get("event_type") == "anomaly_detected"
+            and e.get("action") == "ALLOW"
+        )
+        fpr = anomaly_after_allow / max(allow_count, 1)
+
+        entropy_values = []
+        for e in entries:
+            meta = e.get("metadata", {}) or {}
+            if "entropy_before" in meta:
+                entropy_values.append(float(meta["entropy_before"]))
+            if "entropy_after" in meta:
+                entropy_values.append(float(meta["entropy_after"]))
+        avg_entropy = sum(entropy_values) / max(len(entropy_values), 1)
+
+        signed_count = sum(1 for e in entries if e.get("hmac_signature"))
+
+        return AggregateReport(
+            deployment_id=self._deployment_id,
+            total_entries=len(entries),
+            window_hours=round(window_hours, 2),
+            fnr=round(fnr, 4),
+            fpr=round(fpr, 4),
+            avg_entropy=round(avg_entropy, 4),
+            state_transition_count=sum(
+                1 for e in entries if e.get("event_type") == "state_transition"
+            ),
+            cb_trip_count=sum(
+                1 for e in entries
+                if e.get("event_type") == "circuit_breaker"
+                or "trip" in e.get("event_type", "")
+            ),
+            anomaly_count=sum(1 for e in entries if e.get("event_type") == "anomaly_detected"),
+            event_type_dist=event_type_dist,
+            action_dist=action_dist,
+            signed_ratio=round(signed_count / max(len(entries), 1), 4),
+        )
+
+    def export_json(self, max_entries: int = 5000, pretty: bool = False) -> str:
+        batch = self.build_batch(max_entries=max_entries)
+        return json.dumps(batch, ensure_ascii=False, default=str, indent=2 if pretty else None)
+
+    def send(self, max_entries: int = 5000) -> dict[str, Any]:
+        batch = self.build_batch(max_entries=max_entries)
+        try:
+            import httpx
+            resp = httpx.post(
+                self._endpoint,
+                json=batch,
+                timeout=30.0,
+                headers={"User-Agent": f"maref-telemetry/{TELEMETRY_VERSION}"},
+            )
+            if resp.is_success:
+                logger.info("Telemetry batch sent: %s entries → %s", len(batch["entries"]), self._endpoint)
+                return {"status": "ok", "response": resp.json()}
+            else:
+                logger.warning("Telemetry send failed: HTTP %s", resp.status_code)
+                return {"status": "error", "http_status": resp.status_code}
+        except ImportError:
+            logger.warning("httpx not installed, falling back to urllib")
+            return self._send_urllib(batch)
+        except Exception as exc:
+            logger.warning("Telemetry send failed: %s", exc)
+            return {"status": "error", "error": str(exc)}
+
+    def _send_urllib(self, batch: dict[str, Any]) -> dict[str, Any]:
+        try:
+            import urllib.request
+            data = json.dumps(batch).encode("utf-8")
+            req = urllib.request.Request(
+                self._endpoint,
+                data=data,
+                headers={"Content-Type": "application/json", "User-Agent": f"maref-telemetry/{TELEMETRY_VERSION}"},
+                method="POST",
+            )
+            with urllib.request.urlopen(req, timeout=30) as resp:
+                return {"status": "ok", "response": json.loads(resp.read())}
+        except Exception as exc:
+            return {"status": "error", "error": str(exc)}