docs(experimental): list code-runtime-python in the group README; state the portable note as current fact

The review's items: the experimental group README's Packages table and Summary
now list code-runtime-python (CPython subprocess backend, ctx.codeRuntime),
paired; the portable-identifier note's Scope drops the 'has since shipped …
now lists' change narration in favor of the current state, removing the
apparent contradiction with 'the worker is the only shipped backend'.

.agents/notes/implemented/architecture/2026-07-31-code-runtime-portable-identifier-seam.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 .agents/notes/implemented/architecture/2026-07-31-code-runtime-portable-identifier-seam.md
-2026-07-31-code-runtime-portable-identifier-seam.md: d44de2c5331951b4755bf3e6e3e602011ec4f57e
-2026-07-31-code-runtime-portable-identifier-seam.zh.md: 4c9269d10031944207dda38049f591bc0db77d90
+2026-07-31-code-runtime-portable-identifier-seam.md: e4cf236f62407c9fda42a3e2cdcc5d3ef02a1f92
+2026-07-31-code-runtime-portable-identifier-seam.zh.md: 63fc89eb0d674a381ce7a5a626bd51d5f8b234d3

.agents/notes/implemented/architecture/2026-07-31-code-runtime-portable-identifier-seam.md

@@ -25,7 +25,7 @@ The constants live in the Service Definition even though the worker is the only
 
 ## Scope
 
-This decision defines the Service Definition extension and its adoption by the worker-thread and CPython subprocess backends. The `py-types` renderer and PTC mode language dispatch are owned by the [language-dispatch note](../feature/2026-07-31-ptc-language-dispatch.md).
+This decision delivers the Service Definition extension and the worker-thread backend's adoption of it. The `py-types` renderer and PTC mode language dispatch are owned by the [language-dispatch note](../feature/2026-07-31-ptc-language-dispatch.md). The private experimental CPython subprocess backend (`dsh-experimental-code-runtime-python`) adopts the same portable-identifier contract.
 
 `RESERVED_BINDING_GLOBALS` encodes the Python bootstrap's concrete design ahead of the backend itself: it seeds exactly `__builtins__`/`__name__` and wraps the program under `__dsh_main__`. A Python backend that seeds any additional module global (`__doc__`, `__loader__`, `__spec__`, `__file__`, `__package__`, …) MUST widen this set in the same change, exactly as adding a language widens `PORTABLE_RESERVED_WORDS` — a name the bootstrap seeds but the set omits is the portability split this contract exists to prevent.
 

.agents/notes/implemented/architecture/2026-07-31-code-runtime-portable-identifier-seam.zh.md

@@ -25,7 +25,7 @@ Service Definition 同时把可移植标识符子集收窄为 `[A-Za-z_][A-Za-z0
 
 ## Scope
 
-本决策定义 Service Definition 扩展，以及 worker-thread 与 CPython 子进程后端对它的采用。`py-types` 渲染器与 PTC mode 的语言分发归[语言分发 note](../feature/2026-07-31-ptc-language-dispatch.zh.md)所有。
+本决策交付 Service Definition 扩展与 worker-thread 后端对它的采用。`py-types` 渲染器与 PTC mode 的语言分发归[语言分发 note](../feature/2026-07-31-ptc-language-dispatch.zh.md)所有。私有的实验性 CPython 子进程后端（`dsh-experimental-code-runtime-python`）采用同一 portable-identifier 契约。
 
 `RESERVED_BINDING_GLOBALS` 先于后端本身编码了 Python bootstrap 的具体设计：它恰好 seed `__builtins__`/`__name__`，并把程序包装在 `__dsh_main__` 之下。任何 seed 额外模块 global（`__doc__`、`__loader__`、`__spec__`、`__file__`、`__package__` 等）的 Python 后端必须在同一改动中扩宽此集合，正如新增一门语言即扩宽 `PORTABLE_RESERVED_WORDS`——bootstrap 会 seed 却不在集合中的名称，正是本约定要防止的可移植性分裂。
 

packages/experimental/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/experimental/README.md
-README.md: 750f38a116681a4a57575e9a55a49c06e7b40108
-README.zh.md: 551ef051a57e2787cea080a3df26c98d2af68f7c
+README.md: 689739bc532ddde4c41c3fb550d098add0501f70
+README.zh.md: 18499a28849dd3f4671ef266f24818cdc30f15e8

packages/experimental/README.md

@@ -9,7 +9,7 @@ English | [中文](README.zh.md)
 
 ## Summary
 
-The experimental group contains prototype capabilities that are not part of any official release: they run on the real harness, but their contracts can change and they carry no support promise. The group holds Agent Teams, the cross-realm Inspector, and the browser-worker runtime and image packer used by preview deployments. Use these packages to try an unreleased capability; they carry no stability promise, and released products must not depend on them.
+The experimental group contains prototype capabilities that are not part of any official release: they run on the real harness, but their contracts can change and they carry no support promise. The group holds Agent Teams, the cross-realm Inspector, the CPython subprocess backend for the code-execution seam, and the browser-worker runtime and image packer used by preview deployments. Use these packages to try an unreleased capability; they carry no stability promise, and released products must not depend on them.
 
 ## Table of Contents
 
@@ -28,6 +28,7 @@ The experimental group contains prototype capabilities that are not part of any
 | [`agent-team`](agent-team/README.md) | Named teammates with durable messages and a shared task board | `ctx.agentTeams` |
 | [`agent-team-web-profile`](agent-team-web-profile/README.md) | Explicit source-checkout Web layer for Agent Teams | — |
 | [`client-ui-agent-team`](client-ui-agent-team/README.md) | Team roster, task board, and teammate navigation for Web | — |
+| [`code-runtime-python`](code-runtime-python/README.md) | CPython subprocess backend for the code-execution seam | `ctx.codeRuntime` |
 | [`inspector`](inspector/README.md) | Cross-realm CDP hub for Host debugging, Client Runtime inspection, network capture, and Cordis trees | `ctx.inspector` |
 | [`tool-agent-team`](tool-agent-team/README.md) | Ten tools that let the model create, message, and coordinate teammates | registers scoped tools on `ctx.tools` |
 | [`webworker-packer`](webworker-packer/README.md) | Builds the gzip-compressed VFS image consumed by the browser worker preview | library and CLI — no ctx key |

packages/experimental/README.zh.md

@@ -9,7 +9,7 @@ kind: "package-group"
 
 ## 概述
 
-实验组包含不属于任何正式发布的原型能力：它们运行在真实 harness 上，但约定可能变更，也不提供支持承诺。本组包含 Agent Teams、跨 realm Inspector，以及预览部署使用的浏览器 worker 运行时与镜像打包器。用这些包来尝试未发布的能力；它们没有稳定性承诺，已发布产品不得依赖它们。
+实验组包含不属于任何正式发布的原型能力：它们运行在真实 harness 上，但约定可能变更，也不提供支持承诺。本组包含 Agent Teams、跨 realm Inspector、代码执行 seam 的 CPython 子进程后端，以及预览部署使用的浏览器 worker 运行时与镜像打包器。用这些包来尝试未发布的能力；它们没有稳定性承诺，已发布产品不得依赖它们。
 
 ## 目录
 
@@ -28,6 +28,7 @@ kind: "package-group"
 | [`agent-team`](agent-team/README.zh.md) | 具名 teammate，成员之间持久消息与共享任务板 | `ctx.agentTeams` |
 | [`agent-team-web-profile`](agent-team-web-profile/README.zh.md) | Agent Teams 的显式源码 checkout Web 层 | — |
 | [`client-ui-agent-team`](client-ui-agent-team/README.zh.md) | Web Team roster、任务板与 teammate 导航 | — |
+| [`code-runtime-python`](code-runtime-python/README.zh.md) | 代码执行 seam 的 CPython 子进程后端 | `ctx.codeRuntime` |
 | [`inspector`](inspector/README.zh.md) | 用于 Host 调试、Client Runtime 检查、网络采集与 Cordis 树的跨 realm CDP hub | `ctx.inspector` |
 | [`tool-agent-team`](tool-agent-team/README.zh.md) | 让模型创建、发消息与协调 teammate 的十个工具 | 按作用域注册工具到 `ctx.tools` |
 | [`webworker-packer`](webworker-packer/README.zh.md) | 构建浏览器 worker 预览所消费的 gzip 压缩 VFS 镜像 | 库与 CLI，不使用 ctx key |