fix(opencode): preserve v1 database compatibility (#42444)

packages/opencode/src/control-plane/workspace.ts

@@ -714,6 +714,7 @@ const layer = Layer.effect(
     })
 
     const list = Effect.fn("Workspace.list")(function* (project: Project.Info) {
+      if (!flags.experimentalWorkspaces) return []
       return (yield* db
         .select()
         .from(WorkspaceTable)
@@ -851,6 +852,7 @@ const layer = Layer.effect(
     })
 
     const startWorkspaceSyncing = Effect.fn("Workspace.startWorkspaceSyncing")(function* (projectID: ProjectV2.ID) {
+      if (!flags.experimentalWorkspaces) return
       const rows = yield* db
         .selectDistinct({ workspace: WorkspaceTable })
         .from(WorkspaceTable)

packages/opencode/test/control-plane/workspace.test.ts

@@ -8,6 +8,7 @@ import { Effect, Exit, Fiber, Layer, Schema } from "effect"
 import { HttpServer, HttpServerRequest, HttpServerResponse } from "effect/unstable/http"
 import { eq } from "drizzle-orm"
 import { GlobalBus, type GlobalEvent } from "@/bus/global"
+import { Project } from "@/project/project"
 import { Database } from "@opencode-ai/core/database/database"
 import { ProjectV2 } from "@opencode-ai/core/project"
 import { ProjectTable } from "@opencode-ai/core/project/sql"
@@ -133,6 +134,9 @@ const startWorkspaceSyncingWithFlag = (projectID: ProjectV2.ID, experimentalWork
     Workspace.use.startWorkspaceSyncing(projectID).pipe(Effect.provide(workspaceLayer(experimentalWorkspaces))),
   )
 
+const listWithFlag = (project: Project.Info, experimentalWorkspaces: boolean) =>
+  Effect.runPromise(Workspace.use.list(project).pipe(Effect.provide(workspaceLayer(experimentalWorkspaces))))
+
 function captureGlobalEvents() {
   const events: GlobalEvent[] = []
   const handler = (event: GlobalEvent) => events.push(event)
@@ -417,6 +421,18 @@ describe("workspace CRUD", () => {
     { git: true },
   )
 
+  it.instance(
+    "list is disabled by the experimental workspace flag",
+    () =>
+      Effect.gen(function* () {
+        const instance = yield* requireInstance
+        yield* insertWorkspace(workspaceInfo(instance.project.id, "manual"))
+
+        expect(yield* Effect.promise(() => listWithFlag(instance.project, false))).toEqual([])
+      }),
+    { git: true },
+  )
+
   it.instance(
     "create configures, persists, creates, starts local sync, and passes environment",
     () =>