docs: define a seam as the (Service, Service provider, Consumer) trio

packages/code-runtime/code-runtime/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/code-runtime/code-runtime/README.md
-README.md: bb1c20d00a260f643f601c42c6e48722437d5aab
-README.zh.md: 2a68e6f05d12b737bdff530a351aa038628d85fc
+README.md: 637cc6adae3372ea60ca003f74af416513484270
+README.zh.md: fcc4c7323dd547c2421bb1e5a009481bf78cfc70

packages/code-runtime/code-runtime/README.md

@@ -2,7 +2,7 @@
 
 English | [中文](README.zh.md)
 
-The **code-execution seam**: an abstract `CodeRuntime` service (`ctx.codeRuntime`) defining WHAT a code runtime does — run one model-written program against a set of host-provided async bindings and report `{ value, logs, error? }` — without saying HOW.
+The **`CodeRuntime`** (`ctx.codeRuntime`) defines WHAT a code runtime does — run one model-written program against a set of host-provided async bindings and report `{ value, logs, error? }` — without saying HOW.
 
 This package is the interface third of the capability (the bash trio is the template — see [capability seams](../../../.agents/notes/implemented/architecture/2026-06-13-capability-seams.md)): implementations subclass `CodeRuntime` and register the service; the consumer is the tool registry's Code Mode, which generates the model-facing SDK and bridges tool dispatch — both specified in the [Code Mode Agent Note](../../../.agents/notes/implemented/feature/2026-06-15-code-mode.md), whose first implementation is a Node worker-thread backend. The runtime knows nothing about tools or sessions: it is handed named async functions and a program string, and everything tool-shaped stays with the consumer.
 

packages/code-runtime/code-runtime/README.zh.md

@@ -2,7 +2,7 @@
 
 [English](README.md) | 中文
 
-这是**代码执行 seam**：抽象的 `CodeRuntime` 服务（`ctx.codeRuntime`）只定义代码运行时做什么，即针对宿主提供的一组异步绑定运行一段模型编写的程序，并报告 `{ value, logs, error? }`，而不规定如何实现。
+**`CodeRuntime`**（`ctx.codeRuntime`）定义代码运行时做什么，即针对宿主提供的一组异步绑定运行一段模型编写的程序，并报告 `{ value, logs, error? }`，而不规定如何实现。
 
 此包承担该能力三个组成部分中的接口职责（以 bash 三包结构为模板，参见[能力 seam](../../../.agents/notes/implemented/architecture/2026-06-13-capability-seams.md)）：实现通过继承 `CodeRuntime` 并注册服务接入；消费方是工具注册表的 Code Mode，它生成面向模型的 SDK，并桥接工具分发。这两项职责均由 [Code Mode Agent Note](../../../.agents/notes/implemented/feature/2026-06-15-code-mode.md) 规定，首个实现是 Node worker 线程后端。运行时不了解工具或会话：调用方只向它提供具名异步函数与程序字符串；所有与工具有关的内容都留在消费方。