feat(api): content.load_npc + content-root resolver

api/tests/test_content_npc.py

@@ -0,0 +1,27 @@
+import json
+
+import app.content as content
+
+
+def test_load_npc_returns_parsed_file(tmp_path, monkeypatch):
+    root = tmp_path / "content"
+    (root / "world" / "npcs").mkdir(parents=True)
+    (root / "world" / "npcs" / "fenn.json").write_text(
+        json.dumps({"id": "fenn", "name": "Fenn", "persona": "clerk",
+                    "knowledge": ["a"], "capabilities": {}})
+    )
+    monkeypatch.setenv("CONTENT_ROOT", str(root))
+    npc = content.load_npc("fenn")
+    assert npc["name"] == "Fenn"
+    assert npc["knowledge"] == ["a"]
+
+
+def test_load_npc_unknown_returns_none(tmp_path, monkeypatch):
+    (tmp_path / "content" / "world").mkdir(parents=True)
+    monkeypatch.setenv("CONTENT_ROOT", str(tmp_path / "content"))
+    assert content.load_npc("nobody") is None
+
+
+def test_content_root_env_override(tmp_path, monkeypatch):
+    monkeypatch.setenv("CONTENT_ROOT", str(tmp_path))
+    assert content._content_root() == tmp_path