diff --git a/patterns/default.yaml b/patterns/default.yaml
index c5ea6a0..ab6f1d4 100644
--- a/patterns/default.yaml
+++ b/patterns/default.yaml
@@ -211,10 +211,10 @@ patterns:
     domain: media
     description: Plex EasyAudioEncoder (EAC3 Dolby audio transcoder) crashed — service restart required
 
-  # - name: ext_device_device_error
+  # - name: ext_device_error
   #   pattern: "ERR-\d{4}"
   #   severity: ERROR
-  #   description: EXT_DEVICE device error code
+  #   description: vendor device structured error code
 
   # ── VPN / tunnel patterns ──────────────────────────────────────────────────
 
diff --git a/scripts/gen_corpus.py b/scripts/gen_corpus.py
index 01b65f2..c1a4ed4 100644
--- a/scripts/gen_corpus.py
+++ b/scripts/gen_corpus.py
@@ -12,7 +12,7 @@ Output tree:
     <out>/journald/system.jsonl   — systemd/kernel journald JSON
     <out>/docker/services.jsonl   — containerised app stdout
     <out>/qbittorrent/qbt.log     — hotio-format qBittorrent log
-    <out>/ext_device/device.log         — EXT_DEVICE device plaintext log
+    <out>/ext_device/device.log    — vendor device plaintext log
 """
 from __future__ import annotations
 
@@ -308,7 +308,7 @@ def gen_qbittorrent(path: Path, start: datetime, end: datetime, rng: random.Rand
 
 
 def gen_ext_device(path: Path, start: datetime, end: datetime, rng: random.Random, error_rate: float) -> int:
-    """Emit EXT_DEVICE device plaintext log (ISO timestamp + level + ERR/SYS/NET code + message)."""
+    """Emit vendor device plaintext log (ISO timestamp + level + ERR/SYS/NET code + message)."""
     lines = 0
     with path.open("w") as fh:
         for dt in _ts_seq(start, end, rng):
@@ -326,7 +326,7 @@ _GENERATORS: list[tuple[str, str, Callable]] = [
     ("journald",    "system.jsonl",  gen_journald),
     ("docker",      "services.jsonl", gen_docker),
     ("qbittorrent", "qbt.log",       gen_qbittorrent),
-    ("ext_device",        "device.log",    gen_ext_device),
+    ("ext_device",  "device.log",    gen_ext_device),
 ]
 
 
diff --git a/tests/test_gen_corpus.py b/tests/test_gen_corpus.py
index 59468f1..8328c62 100644
--- a/tests/test_gen_corpus.py
+++ b/tests/test_gen_corpus.py
@@ -129,7 +129,7 @@ class TestQbittorrentFormat:
         assert severities <= {"INFO", "WARN", "CRITICAL"}
 
 
-# ── EXT_DEVICE format ────────────────────────────────────────────────────────────────
+# ── Vendor device format ────────────────────────────────────────────────────────────────
 
 class TestAvcxFormat:
     def test_iso_timestamp_prefix(self, tmp_path: Path) -> None: