test(agent): isolate plugin agent regression

Author: kitlangton

packages/opencode/test/agent/plugin-agent-regression.test.ts

@@ -1,9 +1,18 @@
 import { expect } from "bun:test"
-import { Effect, Layer } from "effect"
+import { Npm } from "@opencode-ai/core/npm"
+import { AppFileSystem } from "@opencode-ai/core/filesystem"
+import { Effect, Layer, Option } from "effect"
 import path from "path"
 import { pathToFileURL } from "url"
+import { Account } from "../../src/account/account"
 import { Agent } from "../../src/agent/agent"
+import { Auth } from "../../src/auth"
+import { Bus } from "../../src/bus"
+import { Config } from "../../src/config/config"
+import { Env } from "../../src/env"
 import { Plugin } from "../../src/plugin"
+import { Skill } from "../../src/skill"
+import { ProviderTest } from "../fake/provider"
 import { testEffect } from "../lib/effect"
 import { PLUGIN_AGENT } from "../fixture/agent-plugin.constants"
 
@@ -12,7 +21,41 @@ import { PLUGIN_AGENT } from "../fixture/agent-plugin.constants"
 // to verify plugin → config hook → Agent.list.
 const pluginUrl = pathToFileURL(path.join(import.meta.dir, "..", "fixture", "agent-plugin.ts")).href
 
-const it = testEffect(Layer.mergeAll(Agent.defaultLayer, Plugin.defaultLayer))
+const emptyAccount = Layer.mock(Account.Service)({
+  active: () => Effect.succeed(Option.none()),
+  activeOrg: () => Effect.succeed(Option.none()),
+})
+
+const emptyAuth = Layer.mock(Auth.Service)({
+  all: () => Effect.succeed({}),
+})
+
+const emptySkill = Layer.mock(Skill.Service)({
+  dirs: () => Effect.succeed([]),
+})
+
+const noopNpm = Layer.mock(Npm.Service)({
+  install: () => Effect.void,
+})
+
+const provider = ProviderTest.fake()
+const configLayer = Config.layer.pipe(
+  Layer.provide(AppFileSystem.defaultLayer),
+  Layer.provide(Env.defaultLayer),
+  Layer.provide(emptyAuth),
+  Layer.provide(emptyAccount),
+  Layer.provide(noopNpm),
+)
+const pluginLayer = Plugin.layer.pipe(Layer.provide(Bus.layer), Layer.provide(configLayer))
+const agentLayer = Agent.layer.pipe(
+  Layer.provide(configLayer),
+  Layer.provide(emptyAuth),
+  Layer.provide(emptySkill),
+  Layer.provide(provider.layer),
+  Layer.provide(pluginLayer),
+)
+
+const it = testEffect(Layer.mergeAll(agentLayer, pluginLayer))
 
 it.instance(
   "plugin-registered agents appear in Agent.list",