docs: restore architecture headroom

docs/architecture.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
-architecture.md: 02b5d854f87e06db6b90d6402ea630e196bc5a23
-architecture.zh.md: 57adb6a2959ee9336364b403f736f914b72b42f4
+architecture.md: 937d0e5dc2d41140506ecb9483e1b2d35abcb41f
+architecture.zh.md: 255035c4018b9a4edc788441225d47cb43757c76

docs/architecture.md

@@ -131,7 +131,7 @@ Session events are turn-enclosed; reload closes an interrupted tail with a synth
 
 ### Agent Handles
 
-`ctx.agents` returns `AgentHandle { agent, dispose() }`. Plugins normally use intent-named `send()`, `queue()`, `steer()`, and `inject()`; callers with fully resolved routing may use `acceptInput()` with every field mandatory ([decision](../.agents/notes/implemented/architecture/2026-07-24-intent-named-agent-delivery.md)). `cancel()` and `whenIdle()` control cancellation and quiescence. Caller, provider, and handle co-own one awaited teardown.
+`ctx.agents` returns `AgentHandle { agent, dispose() }`. Plugins use `send()`, `queue()`, `steer()`, and `inject()`; callers may use mandatory-field `acceptInput()` ([decision](../.agents/notes/implemented/architecture/2026-07-24-intent-named-agent-delivery.md)). `cancel()` and `whenIdle()` control lifecycle. Caller, provider, and handle co-own teardown.
 
 ### Agent Scope
 

docs/architecture.zh.md

@@ -131,7 +131,7 @@ forever:
 
 ### Agent 句柄
 
-`ctx.agents` 返回 `AgentHandle { agent, dispose() }`。插件通常使用按意图命名的 `send()`、`queue()`、`steer()` 和 `inject()`；调用方若已持有完全解析的路由信息，可以使用 `acceptInput()`，其中每个字段均为必填项（[决策](../.agents/notes/implemented/architecture/2026-07-24-intent-named-agent-delivery.md)）。`cancel()` 和 `whenIdle()` 控制取消和停稳过程。调用方、提供方和句柄共同拥有一项需等待完成的拆卸过程。
+`ctx.agents` 返回 `AgentHandle { agent, dispose() }`。插件使用 `send()`、`queue()`、`steer()` 和 `inject()`；调用方可以使用各字段均为必填项的 `acceptInput()`（[决策](../.agents/notes/implemented/architecture/2026-07-24-intent-named-agent-delivery.md)）。`cancel()` 和 `whenIdle()` 控制生命周期。调用方、提供方和句柄共同拥有拆卸过程。
 
 ### Agent 作用域