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/opencode/test/cli/effect-cmd-instance-als.test.ts

@@ -0,0 +1,39 @@
+import { afterEach, expect } from "bun:test"
+import { FSUtil } from "@opencode-ai/core/fs-util"
+import { Effect } from "effect"
+import { fileURLToPath } from "url"
+import { InstanceRef } from "../../src/effect/instance-ref"
+import { disposeAllInstances, TestInstance } from "../fixture/fixture"
+import { testEffect } from "../lib/effect"
+
+const it = testEffect(FSUtil.defaultLayer)
+
+afterEach(async () => {
+  await disposeAllInstances()
+})
+
+it.live("effect-cmd.ts does not restore legacy instance ALS", () =>
+  Effect.gen(function* () {
+    const fs = yield* FSUtil.Service
+    const source = yield* fs.readFileString(fileURLToPath(new URL("../../src/cli/effect-cmd.ts", import.meta.url)))
+    expect(source).not.toContain("restore(ctx")
+  }),
+)
+
+it.instance(
+  "InstanceRef remains the handler context across Effect promise awaits",
+  () =>
+    Effect.gen(function* () {
+      const test = yield* TestInstance
+      const ctx = yield* InstanceRef
+      if (!ctx) throw new Error("InstanceRef not provided")
+
+      const directory = yield* Effect.promise(async () => {
+        await Promise.resolve()
+        return ctx.directory
+      })
+
+      expect(directory).toBe(test.directory)
+    }),
+  { git: true },
+)