feat: rename experimental-meta/-upgrade to meta/upgrade behind --experimental gate

packages/ui/tui/README.i18n.yaml

@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write packages/ui/tui/README.md
-README.md: 20ad471faa707cce0e6f0ce4df2289a900f09b93
-README.zh.md: a7d918ba3239d3e6feaa2fb43181e4bcf33e1d89
+README.md: c81cac891403e5294c4456ce4d4048ecd74666ce
+README.zh.md: 01055619f4df460284564f0a1816de366d809e01

packages/ui/tui/README.md

@@ -40,7 +40,7 @@ Selection repeats those checks and requires the current agent to be idle before
 
 The exit line is launcher-owned, not configurable. A launcher provides `TUI_GOODBYE_MESSAGE_KEY` on the boot context — for the shipped `dsh`, the command that resumes this session — and exiting prints it verbatim after the terminal is released; absent, exiting prints nothing. Only the launcher knows how it was invoked, so only it can name a command that works. The TUI escapes terminal controls before rendering and never executes the text. A launcher that also supplies `MAIN_SESSION_ID_KEY` fixes which session the mounted app binds to, so resume survives any config-level patch.
 
-A launcher can seed a fresh session's first turn by providing `INITIAL_SKILL_KEY` (the skill name) on the boot context; the TUI auto-invokes it exactly as a typed `/skill:<name>`, once the chat is live. The shipped `dsh migrate`/`dsh experimental-upgrade` set it and only for a fresh session, so a resumed session never re-invokes the skill; an unknown name is reported as a notice.
+A launcher can seed a fresh session's first turn by providing `INITIAL_SKILL_KEY` (the skill name) on the boot context; the TUI auto-invokes it exactly as a typed `/skill:<name>`, once the chat is live. The shipped `dsh migrate`/`dsh upgrade` set it and only for a fresh session, so a resumed session never re-invokes the skill; an unknown name is reported as a notice.
 
 ## Config
 

packages/ui/tui/README.zh.md

@@ -40,7 +40,7 @@ Footer 将会话报告的用量汇总为 `↑<uncached input> ↓<output>`；任
 
 退出时打印的行由启动器拥有，不可通过配置指定。启动器在启动上下文上提供 `TUI_GOODBYE_MESSAGE_KEY`（对于随附的 `dsh`，即恢复本会话的命令），释放终端后退出会原样打印它；未提供时退出不打印任何内容。只有启动器知道自己是如何被调用的，因此只有它能给出可用的命令。TUI 在渲染前会转义终端控制字符，且绝不执行该文本。若启动器同时提供 `MAIN_SESSION_ID_KEY`，则会固定已挂载应用绑定的会话，因此恢复功能不受配置层修补影响。
 
-启动器可通过在启动上下文上提供 `INITIAL_SKILL_KEY`（skill 名称）来播种全新会话的首轮；聊天就绪后，TUI 会像用户手动键入 `/skill:<name>` 一样自动调用它。随附的 `dsh migrate`/`dsh experimental-upgrade` 会设置该键，且仅对全新会话设置，因此恢复的会话绝不会重复调用该 skill；未知名称会以通知形式报告。
+启动器可通过在启动上下文上提供 `INITIAL_SKILL_KEY`（skill 名称）来播种全新会话的首轮；聊天就绪后，TUI 会像用户手动键入 `/skill:<name>` 一样自动调用它。随附的 `dsh migrate`/`dsh upgrade` 会设置该键，且仅对全新会话设置，因此恢复的会话绝不会重复调用该 skill；未知名称会以通知形式报告。
 
 ## 配置
 

packages/ui/tui/src/config.ts

@@ -122,7 +122,7 @@ export interface Config extends TuiConfig {
   /**
    * Skill name auto-invoked as this session's first user turn, exactly as if
    * the user typed `/skill:<name>`. Set only by a launcher for a fresh
-   * skill-guided session (`dsh migrate`/`dsh experimental-upgrade`); absent
+   * skill-guided session (`dsh migrate`/`dsh upgrade`); absent
    * leaves the first turn to the user.
    */
   initialSkill?: string

packages/ui/tui/src/index.ts

@@ -227,7 +227,7 @@ export const TUI_GOODBYE_MESSAGE_KEY = 'tuiGoodbyeMessage'
 /**
  * Context key a launcher sets before any Loader entry mounts
  * (`ctx.provide(INITIAL_SKILL_KEY, name)`) to seed a fresh session's first user
- * turn with `/skill:<name>` — the `dsh migrate`/`dsh experimental-upgrade`
+ * turn with `/skill:<name>` — the `dsh migrate`/`dsh upgrade`
  * guided-session entry. The launcher sets it only when minting a fresh session,
  * so it never re-fires on a resumed one. Absent leaves the first turn to the user.
  */
@@ -1690,7 +1690,7 @@ export function createTuiChat(
   })
   startBannerReveal()
 
-  // A launcher-seeded first turn (`dsh migrate`/`dsh experimental-upgrade`):
+  // A launcher-seeded first turn (`dsh migrate`/`dsh upgrade`):
   // invoke the named skill exactly as a typed `/skill:<name>` would, once the
   // chat is live and the agent is idle. The launcher sets this only for a fresh
   // session, so there is no prior turn to collide with; invokeSkill reports an