feat(typert): propagate Remote cancellation

packages/typert/type-meta/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/typert/type-meta/README.md
-README.md: 9dd8dadd07b219c7471c8851262958d4d9e96a43
-README.zh.md: 5716f56d988c6d2dd9cd237346c3b02ec9ae7c4e
+README.md: 95716446c01c7fd510cdf55a82509b5b8af6f3ae
+README.zh.md: 0d30b3122265d9bb3caa289345f843fe67377be3

packages/typert/type-meta/README.md

@@ -11,6 +11,8 @@ Compiler-independent declarations shared by business packages, generated TypeRT
 - `bindTypeRTGateway(this, serviceKey, options?)` creates the visible, frozen binding between a Service instance, its exact Cordis key, and its wire namespace.
 - `remoteMethods(service)` returns a detached declaration-order snapshot used by the Gateway's SRC fallback.
 
+A Host method opts into cooperative cancellation by declaring `signal: AbortSignal` as its final parameter. `InvocationDescriptor.cancellation` records that reserved injection point; the signal never becomes a JSON parameter or lookup field. SRC recognizes the final parameter name, while strict generation also verifies the global `AbortSignal` type.
+
 Decorator initializers retain markers in a module-private `WeakMap` keyed by the Service prototype. They do not add constructor symbols, prototype properties, parameter metadata, or runtime reflection fields. The Service opts in explicitly through its `typertGateway` binding field.
 
 ## TypeRT protocol

packages/typert/type-meta/README.zh.md

@@ -11,6 +11,8 @@
 - `bindTypeRTGateway(this, serviceKey, options?)` 在服务实例、其准确的 Cordis key 与协议命名空间之间创建可见且冻结的绑定。
 - `remoteMethods(service)` 返回按声明顺序排列、与内部状态分离的快照，供 Gateway 的 SRC 回退路径使用。
 
+Host 方法通过将 `signal: AbortSignal` 声明为最后一个参数来启用协作式取消。`InvocationDescriptor.cancellation` 记录这个保留的注入点；signal 绝不会成为 JSON 参数或 lookup 字段。SRC 识别末位参数名，严格生成还会校验它是否具有全局 `AbortSignal` 类型。
+
 装饰器初始化器将标记保存在以服务 prototype 为键的模块私有 `WeakMap` 中。它们不会在构造函数上添加 symbol，也不会添加 prototype 属性、参数元数据或运行时反射字段。服务通过自身的 `typertGateway` 绑定字段显式接入。
 
 ## TypeRT 协议

packages/typert/type-meta/src/types.ts

@@ -157,6 +157,11 @@ export interface InvocationDescriptor {
   }
   /** Ordered business parameters. */
   readonly parameters: readonly InvocationParameterDescriptor[]
+  /** Transport cancellation injected after business parameters instead of entering wire args. */
+  readonly cancellation?: {
+    /** Reserved final Host method parameter. */
+    readonly parameter: 'signal'
+  }
   /** Codec for the resolved method result. */
   readonly result: TypeRTCodec
   /** Source declaration used only for diagnostics. */