fix(tools): close cancellation review gaps

docs/cookbook/adding-a-tool.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
-adding-a-tool.md: d5ea48542fb439ab1e7f3d2648a4593477d73cf2
-adding-a-tool.zh.md: c989e521f95c69b5b666f8e464d2cd157aa2f634
+adding-a-tool.md: 9e8fa1287c854f33f62a4c6a1ed93adfccc19471
+adding-a-tool.zh.md: be4e0800036ac9bde949a11d8a35e49cfb92efd7

docs/cookbook/adding-a-tool.md

@@ -25,7 +25,7 @@ export function apply(ctx: Context) {
     async execute(args, exec) {
       // args is TYPED from the schema: { path: string; limit?: number }
       // exec carries immutable identity + token; signal is the operational field
-      return [{ type: 'text', text: await readFile(args.path, 'utf8') }]
+      return [{ type: 'text', text: await readFile(args.path, { encoding: 'utf8', signal: exec.signal }) }]
     },
   }))
 }

docs/cookbook/adding-a-tool.zh.md

@@ -25,7 +25,7 @@ export function apply(ctx: Context) {
     async execute(args, exec) {
       // args is TYPED from the schema: { path: string; limit?: number }
       // exec carries immutable identity + token; signal is the operational field
-      return [{ type: 'text', text: await readFile(args.path, 'utf8') }]
+      return [{ type: 'text', text: await readFile(args.path, { encoding: 'utf8', signal: exec.signal }) }]
     },
   }))
 }