From fdeb2748e18255e9c2d5bd7fd3421aa1206d59e5 Mon Sep 17 00:00:00 2001
From: Kit Langton <kit.langton@gmail.com>
Date: Mon, 11 May 2026 19:38:54 -0400
Subject: [PATCH] test(agent): isolate plugin agent regression (#26948)

---
 .../agent/plugin-agent-regression.test.ts     | 28 ++++++++++++++++++-
 packages/opencode/test/fake/account.ts        |  9 ++++++
 packages/opencode/test/fake/auth.ts           |  8 ++++++
 packages/opencode/test/fake/npm.ts            |  8 ++++++
 packages/opencode/test/fake/skill.ts          |  8 ++++++
 5 files changed, 60 insertions(+), 1 deletion(-)
 create mode 100644 packages/opencode/test/fake/account.ts
 create mode 100644 packages/opencode/test/fake/auth.ts
 create mode 100644 packages/opencode/test/fake/npm.ts
 create mode 100644 packages/opencode/test/fake/skill.ts

diff --git a/packages/opencode/test/agent/plugin-agent-regression.test.ts b/packages/opencode/test/agent/plugin-agent-regression.test.ts
index dff972d100..e2dd8a5f7c 100644
--- a/packages/opencode/test/agent/plugin-agent-regression.test.ts
+++ b/packages/opencode/test/agent/plugin-agent-regression.test.ts
@@ -1,9 +1,18 @@
 import { expect } from "bun:test"
+import { AppFileSystem } from "@opencode-ai/core/filesystem"
 import { Effect, Layer } from "effect"
 import path from "path"
 import { pathToFileURL } from "url"
 import { Agent } from "../../src/agent/agent"
+import { Bus } from "../../src/bus"
+import { Config } from "../../src/config/config"
+import { Env } from "../../src/env"
 import { Plugin } from "../../src/plugin"
+import { AccountTest } from "../fake/account"
+import { AuthTest } from "../fake/auth"
+import { NpmTest } from "../fake/npm"
+import { ProviderTest } from "../fake/provider"
+import { SkillTest } from "../fake/skill"
 import { testEffect } from "../lib/effect"
 import { PLUGIN_AGENT } from "../fixture/agent-plugin.constants"
 
@@ -12,7 +21,24 @@ 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 provider = ProviderTest.fake()
+const configLayer = Config.layer.pipe(
+  Layer.provide(AppFileSystem.defaultLayer),
+  Layer.provide(Env.defaultLayer),
+  Layer.provide(AuthTest.empty),
+  Layer.provide(AccountTest.empty),
+  Layer.provide(NpmTest.noop),
+)
+const pluginLayer = Plugin.layer.pipe(Layer.provide(Bus.layer), Layer.provide(configLayer))
+const agentLayer = Agent.layer.pipe(
+  Layer.provide(configLayer),
+  Layer.provide(AuthTest.empty),
+  Layer.provide(SkillTest.empty),
+  Layer.provide(provider.layer),
+  Layer.provide(pluginLayer),
+)
+
+const it = testEffect(Layer.mergeAll(agentLayer, pluginLayer))
 
 it.instance(
   "plugin-registered agents appear in Agent.list",
diff --git a/packages/opencode/test/fake/account.ts b/packages/opencode/test/fake/account.ts
new file mode 100644
index 0000000000..aeaa0735bc
--- /dev/null
+++ b/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"
diff --git a/packages/opencode/test/fake/auth.ts b/packages/opencode/test/fake/auth.ts
new file mode 100644
index 0000000000..c82babb6a2
--- /dev/null
+++ b/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"
diff --git a/packages/opencode/test/fake/npm.ts b/packages/opencode/test/fake/npm.ts
new file mode 100644
index 0000000000..57efe83a0b
--- /dev/null
+++ b/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"
diff --git a/packages/opencode/test/fake/skill.ts b/packages/opencode/test/fake/skill.ts
new file mode 100644
index 0000000000..1a329ace36
--- /dev/null
+++ b/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"