The media four: plex, sonarr, radarr, qbittorrent

The shape they share is the interesting part: a media library is a fact
about the machine that several modules mount, so each declares exactly
the paths it touches, with one owner and mode across all of them. The
host reconciles a directory rather than creating it, so the second
module ensuring a path the first already ensured is maintenance, not a
fight — and ADR 0030 keeps a shared path alive when one of its sharers
is unassigned, because it holds what the mesh did not put there.

Plex runs on the machine's own network like home-assistant, and for the
same reason: discovery is the point. The other three publish, so the
mesh chooses their machine ports.

All pinned by real digests, resolved on this workstation today. The
catalogue stands at 22, of which the arrangement being replaced ran 95
— but its number counts workstation ricing and one-machine tooling
beside services, and only the services convert to manifests like these.

examples/modules/radarr.json

@@ -0,0 +1,57 @@
+{
+  "module": "radarr",
+  "version": "1",
+  "capabilities": [
+    "container-runtime"
+  ],
+  "listens": [
+    {
+      "port": 7878,
+      "protocol": "tcp",
+      "from": "mesh",
+      "why": "managing films"
+    }
+  ],
+  "resources": [
+    {
+      "id": "config",
+      "type": "directory",
+      "path": "/services/radarr/config",
+      "mode": "0700",
+      "owner": "1000:1000"
+    },
+    {
+      "id": "media-movies",
+      "type": "directory",
+      "path": "/services/media/movies",
+      "mode": "0755",
+      "owner": "1000:1000"
+    },
+    {
+      "id": "media-downloads",
+      "type": "directory",
+      "path": "/services/media/downloads",
+      "mode": "0755",
+      "owner": "1000:1000"
+    },
+    {
+      "id": "server",
+      "type": "container",
+      "name": "radarr",
+      "image": "lscr.io/linuxserver/radarr@sha256:119aaa4a4f7349bcd2a136c5373a0d7925b5479915c7dfe0c0ad352db2a6d438",
+      "env": {
+        "PUID": "1000",
+        "PGID": "1000",
+        "TZ": "Etc/UTC"
+      },
+      "ports": [
+        "7878"
+      ],
+      "volumes": [
+        "/services/radarr/config:/config",
+        "/services/media/movies:/movies",
+        "/services/media/downloads:/downloads"
+      ]
+    }
+  ]
+}