feat(core): add embedded v2 session runtime and tool foundation (#30632)

packages/opencode/src/server/routes/instance/httpapi/handlers/v2.ts

@@ -1,6 +1,12 @@
 import { SessionV2 } from "@opencode-ai/core/session"
+import { Database } from "@opencode-ai/core/database/database"
+import { EventV2 } from "@opencode-ai/core/event"
 import { LocationServiceMap } from "@opencode-ai/core/location-layer"
 import { PermissionSaved } from "@opencode-ai/core/permission/saved"
+import { ProjectV2 } from "@opencode-ai/core/project"
+import * as SessionExecutionLocal from "@opencode-ai/core/session/execution/local"
+import { SessionProjector } from "@opencode-ai/core/session/projector"
+import { SessionStore } from "@opencode-ai/core/session/store"
 import { Layer } from "effect"
 import { layer as v2LocationLayer } from "../groups/v2/location"
 import { messageHandlers } from "./v2/message"
@@ -9,6 +15,18 @@ import { providerHandlers } from "./v2/provider"
 import { sessionHandlers } from "./v2/session"
 import { permissionHandlers, savedPermissionHandlers, sessionPermissionHandlers } from "./v2/permission"
 import { fileSystemHandlers } from "./v2/fs"
+import { questionHandlers, sessionQuestionHandlers } from "./v2/question"
+
+const routedSessions = SessionV2.layer.pipe(
+  Layer.provide(SessionProjector.layer),
+  Layer.provide(SessionExecutionLocal.layer),
+  Layer.provide(LocationServiceMap.layer),
+  Layer.provide(SessionStore.layer),
+  Layer.provide(EventV2.layer),
+  Layer.provide(Database.defaultLayer),
+  Layer.provide(ProjectV2.defaultLayer),
+  Layer.orDie,
+)
 
 export const v2Handlers = Layer.mergeAll(
   sessionHandlers,
@@ -19,9 +37,11 @@ export const v2Handlers = Layer.mergeAll(
   sessionPermissionHandlers,
   savedPermissionHandlers,
   fileSystemHandlers,
+  questionHandlers,
+  sessionQuestionHandlers,
 ).pipe(
   Layer.provide(v2LocationLayer),
   Layer.provide(LocationServiceMap.layer),
   Layer.provide(PermissionSaved.layer),
-  Layer.provide(SessionV2.defaultLayer),
+  Layer.provide(routedSessions),
 )