feat(server): add loaded locations debug endpoint

packages/protocol/src/api.ts

@@ -16,6 +16,7 @@ import type { Definition } from "@opencode-ai/schema/event"
 import { AgentGroup } from "./groups/agent.js"
 import { PluginGroup } from "./groups/plugin.js"
 import { HealthGroup } from "./groups/health.js"
+import { DebugGroup } from "./groups/debug.js"
 import { PtyGroup } from "./groups/pty.js"
 import { ShellGroup } from "./groups/shell.js"
 import { makeQuestionGroup } from "./groups/question.js"
@@ -81,6 +82,7 @@ type ApiGroups<
   Event extends HttpApiGroup.Any,
 > =
   | typeof HealthGroup
+  | typeof DebugGroup
   | LocationGroups<LocationId>
   | FormGroups<LocationId, LocationService, FormLocationId, FormLocationService>
   | SessionGroups<SessionLocationId, SessionLocationService>
@@ -165,6 +167,7 @@ const makeApiFromGroup = <
     .add(ReferenceGroup.middleware(locationMiddleware))
     .add(ProjectCopyGroup.middleware(locationMiddleware))
     .add(VcsGroup.middleware(locationMiddleware))
+    .add(DebugGroup)
     .annotateMerge(
       OpenApi.annotations({
         title: "opencode HttpApi",

packages/protocol/src/client.ts

@@ -34,6 +34,7 @@ export const ClientApi: ClientApiShape = makeDefaultApi({
 
 export const groupNames = {
   "server.health": "health",
+  "server.debug": "debug",
   "server.location": "location",
   "server.agent": "agent",
   "server.plugin": "plugin",

packages/protocol/src/groups/debug.ts

@@ -0,0 +1,15 @@
+import { Location } from "@opencode-ai/schema/location"
+import { Schema } from "effect"
+import { HttpApiEndpoint, HttpApiGroup, OpenApi } from "effect/unstable/httpapi"
+
+export const DebugGroup = HttpApiGroup.make("server.debug").add(
+  HttpApiEndpoint.get("debug.location", "/api/debug/location", {
+    success: Schema.Array(Location.Ref),
+  }).annotateMerge(
+    OpenApi.annotations({
+      identifier: "v2.debug.location",
+      summary: "List loaded locations",
+      description: "List locations currently loaded by the server.",
+    }),
+  ),
+)