feat: add v2 generate text endpoint (#34371)

packages/server/src/handlers.ts

@@ -1,4 +1,5 @@
 import { Layer } from "effect"
+import { GenerateHandler } from "./handlers/generate"
 import { MessageHandler } from "./handlers/message"
 import { ModelHandler } from "./handlers/model"
 import { ProviderHandler } from "./handlers/provider"
@@ -25,6 +26,7 @@ export const handlers = Layer.mergeAll(
   SessionHandler,
   MessageHandler,
   ModelHandler,
+  GenerateHandler,
   ProviderHandler,
   IntegrationHandler,
   CredentialHandler,

packages/server/src/handlers/generate.ts

@@ -0,0 +1,26 @@
+import { Generate } from "@opencode-ai/core/generate"
+import { InvalidRequestError, ServiceUnavailableError } from "@opencode-ai/protocol/errors"
+import { Effect } from "effect"
+import { HttpApiBuilder } from "effect/unstable/httpapi"
+import { Api } from "../api"
+
+export const GenerateHandler = HttpApiBuilder.group(Api, "server.generate", (handlers) =>
+  Effect.gen(function* () {
+    return handlers.handle(
+      "generate.text",
+      Effect.fn("server.generate.text")(function* (request) {
+        const generate = yield* Generate.Service
+        const text = yield* generate
+          .text(request.payload)
+          .pipe(
+            Effect.mapError((error) =>
+              error._tag === "Generate.ModelSelectionError"
+                ? new InvalidRequestError({ message: error.message })
+                : new ServiceUnavailableError({ message: error.message, service: error.service }),
+            ),
+          )
+        return { data: { text } }
+      }),
+    )
+  }),
+)