test(agent): isolate plugin agent regression (#26948)

packages/opencode/test/fake/account.ts

@@ -0,0 +1,9 @@
+import { Effect, Layer, Option } from "effect"
+import { Account } from "../../src/account/account"
+
+export const empty = Layer.mock(Account.Service)({
+  active: () => Effect.succeed(Option.none()),
+  activeOrg: () => Effect.succeed(Option.none()),
+})
+
+export * as AccountTest from "./account"

packages/opencode/test/fake/auth.ts

@@ -0,0 +1,8 @@
+import { Effect, Layer } from "effect"
+import { Auth } from "../../src/auth"
+
+export const empty = Layer.mock(Auth.Service)({
+  all: () => Effect.succeed({}),
+})
+
+export * as AuthTest from "./auth"

packages/opencode/test/fake/npm.ts

@@ -0,0 +1,8 @@
+import { Npm } from "@opencode-ai/core/npm"
+import { Effect, Layer } from "effect"
+
+export const noop = Layer.mock(Npm.Service)({
+  install: () => Effect.void,
+})
+
+export * as NpmTest from "./npm"

packages/opencode/test/fake/skill.ts

@@ -0,0 +1,8 @@
+import { Effect, Layer } from "effect"
+import { Skill } from "../../src/skill"
+
+export const empty = Layer.mock(Skill.Service)({
+  dirs: () => Effect.succeed([]),
+})
+
+export * as SkillTest from "./skill"