diff --git a/AGENTS.md b/AGENTS.md
index 0a6d356..5beec5f 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -51,3 +51,11 @@ open a PR. Absolute rule, no exceptions.
 
 Never commit `docs/superpowers/` — local tooling artifacts only. If tracked,
 remove them and add to `.gitignore`.
+
+## Master-data example file
+
+`docs/master-data.example.json` is documented (README.md) as the full
+Stammdaten schema reference. Whenever `MasterDataSet` or `MasterDataJson`
+in `src/LageBuch.Persistence/MasterData/MasterDataSet.cs` gains, loses, or
+renames a top-level field, update `docs/master-data.example.json` in the
+same PR so it stays a complete, accurate example of every category.
diff --git a/docs/master-data.example.json b/docs/master-data.example.json
index 632d7bb..e9af8fc 100644
--- a/docs/master-data.example.json
+++ b/docs/master-data.example.json
@@ -11,6 +11,14 @@
   "checklistTemplateAbbau": [
     { "text": "Fahrzeug abgerüstet?", "mandatory": true }
   ],
+  "links": [
+    { "name": "Wetterdienst", "url": "https://dwd.de" },
+    { "name": "Kartendienst", "url": "https://example.org/karte" }
+  ],
+  "vehicles": [
+    { "wache": "FF Musterstadt", "callSign": "Florian Musterstadt 1", "seats": 9 },
+    { "wache": "FF Musterstadt", "callSign": "Florian Musterstadt 11/1", "seats": 6 }
+  ],
   "personnel": [
     { "lastName": "Mustermann", "firstName": "Max", "role": "ZF", "callSign": "Florian Musterstadt 1", "phone": "0171 0000000" },
     { "lastName": "Musterfrau", "firstName": "Erika", "role": "GF", "callSign": null, "phone": null }