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/llm/test/recorded-utils.ts

@@ -0,0 +1,56 @@
+export const kebab = (value: string) =>
+  value
+    .trim()
+    .replace(/['"]/g, "")
+    .replace(/[^a-zA-Z0-9]+/g, "-")
+    .replace(/^-|-$/g, "")
+    .toLowerCase()
+
+export const missingEnv = (names: ReadonlyArray<string>) => names.filter((name) => !process.env[name])
+
+export const envList = (name: string) =>
+  (process.env[name] ?? "")
+    .split(",")
+    .map((item) => item.trim().toLowerCase())
+    .filter((item) => item !== "")
+
+export const unique = (items: ReadonlyArray<string>) => Array.from(new Set(items))
+
+export const classifiedTags = (input: {
+  readonly prefix?: string
+  readonly provider?: string
+  readonly protocol?: string
+  readonly tags?: ReadonlyArray<string>
+}) =>
+  unique([
+    ...(input.prefix ? [`prefix:${input.prefix}`] : []),
+    ...(input.provider ? [`provider:${input.provider}`] : []),
+    ...(input.protocol ? [`protocol:${input.protocol}`] : []),
+    ...(input.tags ?? []),
+  ])
+
+export const matchesSelected = (input: {
+  readonly prefix: string
+  readonly name: string
+  readonly cassette: string
+  readonly tags: ReadonlyArray<string>
+}) => {
+  const prefixes = envList("RECORDED_PREFIX")
+  const providers = envList("RECORDED_PROVIDER")
+  const requiredTags = envList("RECORDED_TAGS")
+  const tests = envList("RECORDED_TEST")
+  const tags = input.tags.map((tag) => tag.toLowerCase())
+  const names = [input.name, kebab(input.name), input.cassette].map((item) => item.toLowerCase())
+
+  if (prefixes.length > 0 && !prefixes.includes(input.prefix.toLowerCase())) return false
+  if (providers.length > 0 && !providers.some((provider) => tags.includes(`provider:${provider}`))) return false
+  if (requiredTags.length > 0 && !requiredTags.every((tag) => tags.includes(tag))) return false
+  if (tests.length > 0 && !tests.some((test) => names.some((name) => name.includes(test)))) return false
+  return true
+}
+
+export const cassetteName = (
+  prefix: string,
+  name: string,
+  options: { readonly cassette?: string; readonly id?: string },
+) => options.cassette ?? `${prefix}/${options.id ?? kebab(name)}`