Merge branch 'master' into fix/issue-550
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@@ -98,7 +98,7 @@ readHistory(threadId, { beforeItemId?, limit }) -> {
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}
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```
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`subscribe` 不返回完整历史。`lastCompletedItemId` 只是历史读取锚点,前端自行按 item ID 懒加载需要的历史切片。`events` 是当前运行态重建所需的未完成 item 原始事件,以及当前 turn 的生命周期锚点;前端用同一个 reducer 重放 bootstrap 和后续事件。Rust 不保存或理解前端 reducer state。只要 DirectProject 历史切片返回 `hasMore`,聊天视图必须显示“显示更早的对话”入口,并允许按钮或滚动触发下一页,即使当前可见消息窗口没有隐藏消息。
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`subscribe` 不返回完整历史。`lastCompletedItemId` 只是历史读取锚点,前端自行按 item ID 懒加载需要的历史切片。`events` 是当前运行态重建所需的未完成 item 原始事件,以及当前 turn 的生命周期锚点;前端用同一个 reducer 重放 bootstrap 和后续事件。Rust 不保存或理解前端 reducer state。只要 DirectProject 历史切片返回 `hasMore`,聊天视图就必须能继续往前取页,即使当前可见消息窗口没有隐藏消息;入口形态(触顶自动加载 + 填充视口补载、加载行与失败重试、前插不跳)由 [`【ADR】DirectProject对话滚动与历史自动加载-2026-10-02`](../adr/【ADR】DirectProject对话滚动与历史自动加载-2026-10-02.md) 规定,已不再有常驻按钮。
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`consume` 不接收或返回 cursor。每个 subscriber 在 Rust 内部持有自己的 cursor,并在加锁的临界区内完成过期判断、读取和 cursor 前进。前端只持有 `subscriptionId` 与 reducer state。并发 `consume` 不重复返回同一批事件。
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@@ -106,7 +106,7 @@ readHistory(threadId, { beforeItemId?, limit }) -> {
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`subscribe` 在同一个边界内先把新 subscriber 的游标钉在当时的队尾,再收集 bootstrap 的运行态事件,因此 bootstrap 返回的那批事件**就是**该 subscriber 此刻应处理的事件:前端直接 reduce 它们即可,不存在"先补一次 `consume` 才能拿到已暂存事件"的步骤。第一个例外只有回执竞态:Rust 侧一注册完 subscriber 就开始 `notify`,而前端要等回执到达才知道自己的 `subscriptionId`,这段窗口内的通知拿不到订阅身份。前端因此必须记一笔欠账,回执到达后立刻补一次 `consume` 取回那批事件;否则事件会卡在队列里等下一次通知,而一次回合的最后一个事件之后可能再也没有通知。除此之外不轮询,也不设任何定时 `consume`——唤醒只由 `notify` 负责。用定时器兜底既自举不了(判断"有活动回合"本身依赖事件),也把唤醒机制变成两套。
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首屏历史不通过"读取整份对话"的命令获取:`subscribe` 返回的 `lastCompletedItemId` 就是首屏锚点,前端据此调用 `readHistory` 取最近的切片,再按滚动或按钮继续向前分页。系统不提供返回整份对话历史的命令。
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首屏历史不通过"读取整份对话"的命令获取:`subscribe` 返回的 `lastCompletedItemId` 就是首屏锚点,前端据此调用 `readHistory` 取最近的切片,再按滚动继续向前分页(入口形态见上条 ADR)。系统不提供返回整份对话历史的命令。
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### 事件和顺序
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