fix: normalize existing Syncthing route paths

deploy/production/lithium/compose.yaml

@@ -2,7 +2,7 @@ name: archive-control-archive
 
 services:
   archive-client:
-    image: sodium/archive-clients:v0.1.2
+    image: sodium/archive-clients:v0.1.3
     user: "1000:1000"
     restart: unless-stopped
     command: ["--config", "/etc/archive-control/client.toml"]

deploy/production/x1/compose.yaml

@@ -2,7 +2,7 @@ name: archive-control-cache
 
 services:
   archive-client:
-    image: sodium/archive-clients:v0.1.2
+    image: sodium/archive-clients:v0.1.3
     user: "1001:1001"
     restart: unless-stopped
     network_mode: host

deploy/production/x2/compose.yaml

@@ -2,7 +2,7 @@ name: archive-control-cache
 
 services:
   archive-client:
-    image: sodium/archive-clients:v0.1.2
+    image: sodium/archive-clients:v0.1.3
     user: "1001:1001"
     restart: unless-stopped
     network_mode: host

docs/deployment-and-usage.md

@@ -213,7 +213,7 @@ cache/archive routes according to policy.
 ```yaml
 services:
   archive-client:
-    image: sodium/archive-clients:v0.1.2
+    image: sodium/archive-clients:v0.1.3
     user: "1001:1001"
     restart: unless-stopped
     command: ["archive-client", "--config", "/etc/archive-control/client.toml"]

docs/service-apis.md

@@ -29,6 +29,10 @@ The adapter accounts for terminology/behavior changes such as paused versus
 stopped states. It does not mutate qBittorrent preferences, categories, tags,
 limits, queueing defaults, or global save-path behavior.
 
+Syncthing route validation normalizes both absolute and `~/` folder-path
+spellings under the configured sync root before comparing an existing folder;
+an equivalent pre-existing pair is adopted without rewriting it.
+
 ### Inventory normalization
 
 For each torrent the client derives canonical v1/v2 identity from reliable API

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "archive-clients"
-version = "0.1.2"
+version = "0.1.3"
 requires-python = ">=3.11"
 dependencies = ["protobuf==7.35.1", "websockets==16.0"]
 

src/archive_clients/syncthing.py

@@ -369,8 +369,8 @@ class SyncthingRouteManager:
             raise RoutePathConflict("new route path contains unrelated data")
         path.mkdir(parents=True, exist_ok=True)
 
-    @staticmethod
     def _validate_folder(
+        self,
         folder: dict[str, Any],
         api_path: str,
         local_device_id: str,
@@ -382,7 +382,15 @@ class SyncthingRouteManager:
             for item in raw_devices
             if isinstance(item, dict) and isinstance(item.get("deviceID"), str)
         } if isinstance(raw_devices, list) else set()
-        if folder.get("path") != api_path:
+        try:
+            configured_api_path = self._normalized_folder_api_path(
+                folder.get("path")
+            )
+        except RoutePathConflict as exc:
+            raise RoutePathConflict(
+                "existing route ID uses a different path"
+            ) from exc
+        if configured_api_path != api_path:
             raise RoutePathConflict("existing route ID uses a different path")
         if folder.get("type") != "sendreceive":
             raise RouteSetupError("existing route folder is not sendreceive")
@@ -391,6 +399,27 @@ class SyncthingRouteManager:
         if folder.get("paused") is True:
             raise RouteSetupError("existing route folder is paused")
 
+    def _normalized_folder_api_path(self, value: Any) -> str:
+        """Normalize Syncthing's absolute and home-relative path spellings."""
+
+        if not isinstance(value, str) or not value:
+            raise RoutePathConflict("existing route folder path is invalid")
+        candidate = PurePosixPath(value)
+        if candidate.parts and candidate.parts[0] == "~":
+            candidate = self.config.api_root.joinpath(*candidate.parts[1:])
+        if not candidate.is_absolute() or any(
+            part in {"", ".", ".."} for part in candidate.parts
+        ):
+            raise RoutePathConflict("existing route folder path is unsafe")
+        normalized = candidate.as_posix()
+        try:
+            self.config.roots.api_to_local(normalized)
+        except ConfigError as exc:
+            raise RoutePathConflict(
+                "existing route folder path is outside the sync root"
+            ) from exc
+        return normalized
+
     def _wait(self, deadline: float) -> None:
         if time.monotonic() >= deadline:
             raise RouteSetupTimeout("route setup timed out")

tests/test_syncthing.py

@@ -125,6 +125,24 @@ class SyncthingRouteManagerTests(unittest.TestCase):
             self.manager.configure(self.spec, time.monotonic() + 1)
         self.assertEqual(self.transport.puts, [])
 
+    def test_existing_home_relative_folder_path_is_accepted(self):
+        self.transport.config["devices"].append({"deviceID": "PEER"})
+        self.transport.config["folders"].append(
+            {
+                "id": "route-1",
+                "path": "~/routes/route-1",
+                "type": "sendreceive",
+                "devices": [{"deviceID": "LOCAL"}, {"deviceID": "PEER"}],
+            }
+        )
+
+        configured = self.manager.configure(
+            self.spec, time.monotonic() + 1
+        )
+
+        self.assertEqual(self.transport.puts, [])
+        self.assertFalse(configured.local_route.archive_control_created)
+
     def test_bidirectional_nonce_and_ack_are_required(self):
         configured = self.manager.configure(self.spec, time.monotonic() + 1)
         peer_nonce = configured.local_path / (