feat: 品牌替换 + 启动优化 + AGENTS.md 模板定制

- 品牌替换：OpenCode/opencode → AirCoding/aircoding（16+ 文件）
- Logo ASCII art：修复 left/right 行数不匹配导致的启动崩溃
- 启动诊断：添加 OPENCODE_PRINT_TIMING 计时探针
- dev 模式默认 --pure 跳过外部插件加载
- AGENTS.md 模板：追加 AirCoding 多 Agent 专项段落
- architect prompt + plugin：强化 AGENTS.md 产出验证

packages/core/test/plugin/command.test.ts

@@ -0,0 +1,44 @@
+import { describe, expect } from "bun:test"
+import { Effect, Layer } from "effect"
+import { CommandV2 } from "@opencode-ai/core/command"
+import { Location } from "@opencode-ai/core/location"
+import { CommandPlugin } from "@opencode-ai/core/plugin/command"
+import { AbsolutePath } from "@opencode-ai/core/schema"
+import { location } from "../fixture/location"
+import { testEffect } from "../lib/effect"
+
+const directory = AbsolutePath.make("/repo/packages/app")
+const project = AbsolutePath.make("/repo")
+const it = testEffect(
+  CommandV2.locationLayer.pipe(
+    Layer.provide(
+      Layer.succeed(Location.Service, Location.Service.of(location({ directory }, { projectDirectory: project }))),
+    ),
+  ),
+)
+
+describe("CommandPlugin.Plugin", () => {
+  it.effect("registers built-in init and review commands", () =>
+    Effect.gen(function* () {
+      const command = yield* CommandV2.Service
+      yield* CommandPlugin.Plugin.effect.pipe(
+        Effect.provideService(CommandV2.Service, command),
+        Effect.provideService(
+          Location.Service,
+          Location.Service.of(location({ directory }, { projectDirectory: project })),
+        ),
+      )
+
+      expect(yield* command.get("init")).toMatchObject({
+        name: "init",
+        description: "guided AGENTS.md setup",
+      })
+      expect((yield* command.get("init"))?.template).toContain("`/repo`")
+      expect(yield* command.get("review")).toMatchObject({
+        name: "review",
+        description: "review changes [commit|branch|pr], defaults to uncommitted",
+        subtask: true,
+      })
+    }),
+  )
+})