docs(agent-note): flip the regrouping note to implemented

Move the triplet to implemented/architecture/, rewrite Proposal into a
present-tense Decision, fold Acceptance criteria and Risks into
Consequences (recording what pins the result), retitle the migration
section to what the move actually touched, and repoint the seven
inbound FIXME/README links.

packages/scaffold/client/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/scaffold/client/README.md
-README.md: f27ec256330254156c45b136c21308529ea99e3d
-README.zh.md: bd23762500a4da469839da8ddb50455e3419b553
+README.md: b33457875f81d11d09bab2e5aa5ce730e233c78a
+README.zh.md: 271f07ffb0f97abe005971962beb517acfdc05a4

packages/scaffold/client/README.md

@@ -44,6 +44,6 @@ None; this package neither assembles nor sends a provider request.
 ## Known Limitations and Deferred Work
 
 - **No bundled-runtime resolution** — callers name the runtime executable explicitly; packaged-executable discovery stays Python-side until a TypeScript distribution consumer exists.
-- **No mid-turn cancel** — the wire has no prompt-cancel method; abandoning a turn means closing the runtime (see the protocol's [Known Limitations](../sdk-protocol/README.md)).
+- **No mid-turn cancel** — the wire has no prompt-cancel method; abandoning a turn means closing the runtime (see the protocol's [Known Limitations](../protocol/README.md)).
 - **No per-prompt result or cancel** — low-level `prompt()` returns only an enqueue receipt; high-level `run()` owns receipt-to-idle collection, and abandoning it means closing the runtime.
 - **Client→server notifications and server→client requests are unimplemented** on both wire ends; the transport carries them for future approval flows.

packages/scaffold/client/README.zh.md

@@ -44,6 +44,6 @@ console.log(result.finalResponse)
 ## 已知限制与暂缓事项
 
 - **无捆绑运行时解析**——调用方显式指定运行时可执行文件；打包可执行文件的发现留在 Python 侧，直到出现 TypeScript 发行版消费方。
-- **无轮次中取消**——协议层没有提示词取消方法；放弃轮次意味着关闭运行时（见协议的 [已知限制](../sdk-protocol/README.md)）。
+- **无轮次中取消**——协议层没有提示词取消方法；放弃轮次意味着关闭运行时（见协议的 [已知限制](../protocol/README.md)）。
 - **没有逐提示词结果或取消**——低层 `prompt()` 只返回入队回执；高层 `run()` 负责从回执收集到 idle，放弃该过程意味着关闭运行时。
 - **客户端→服务端通知与服务端→客户端请求**在协议两端都未实现；传输层为未来审批流保留了承载能力。