docs(client): document trajectory conversation assembly

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imccyu
2026-08-10 19:05:23 +08:00
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# 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/client/runtime/README.md
README.md: 1ec6cc38aed1bebff6b6ecb40faee7ae3ba9e412
README.zh.md: 6602152790a1d433371e27b274a4eb8c9e3cfcd8
README.md: d84cd793c34242759ad04edf0debb91558ec3dfc
README.zh.md: e7a74c454f24fcec5e797427c21222b1dc258b44

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English | [中文](README.zh.md)
Client cordis boot and React-free object services: SlotsService wraps SlotCore and supplies renderer data sources; SessionsService owns Session objects and the Chat-facing list, scope, and event-window state; SessionHistoryService lazily owns independent raw-history ledgers for inspection consumers, loading the current tail first and prepending one older page only when its consumer requests it. Each history snapshot exposes the raw window's absolute base sequence so a consumer detects a prepend even when the page adds no surface-visible node. WorkspacesService depends on SessionsService and owns Workspace objects, list/actions, default-target derivation, and the New Session blank-reuse entry (`connectWorkspace`). The runtime fans the shared Host stream into the Session, Workspace, and activated history owners without routing inspection state through Session or SessionManager, and bridges the registry-invalidation frames to typed ctx events (`commands/changed`, `session/preset-changed`, `settings/changed`, `credentials/changed`, `models/changed`) so surface caches refetch without touching the stream. `host/session-preset-changed` also folds its preset into the session row, because the switch's RPC echo reaches only the client that issued it. Client sessions are always Host-born (Session+Agent+cwd in one `session.create`); the client holds no pre-entity session state — a session's Agent scope (the client mirror of host dsh-scope, keyed by the shared agent/session id) is born when its row enters the list mirror and dies with the prune. Each `Session` holds a generic `ProjectionValueStore` seeded from the history-tail `projections` block and updated by `session/projection` frames under higher-seq-wins; domain keys (including `todos`) are read via `projections.faceOf` / `useProjection`, not via `ConversationSnapshot`. The store also publishes one reference-stable whole-value map through `SessionSummary.projectionValues`, allowing global list consumers to reuse the same projections without creating per-session subscriptions.
Client cordis boot and React-free object services: SlotsService wraps SlotCore and supplies renderer data sources; SessionsService owns Session objects, list and scope state, and the shared event window and history paging used by registered conversation view targets. WorkspacesService depends on SessionsService and owns Workspace objects, list/actions, default-target derivation, and the New Session blank-reuse entry (`connectWorkspace`). The runtime fans the shared Host stream into Session and Workspace owners and bridges the registry-invalidation frames to typed ctx events (`commands/changed`, `session/preset-changed`, `settings/changed`, `credentials/changed`, `models/changed`) so surface caches refetch without touching the stream. `host/session-preset-changed` also folds its preset into the session row, because the switch's RPC echo reaches only the client that issued it. Client sessions are always Host-born (Session+Agent+cwd in one `session.create`); the client holds no pre-entity session state — a session's Agent scope (the client mirror of host dsh-scope, keyed by the shared agent/session id) is born when its row enters the list mirror and dies with the prune. Contract: api-contracts v3 §4. Each `Session` holds a generic `ProjectionValueStore` seeded from the history-tail `projections` block and updated by `session/projection` frames under higher-seq-wins; domain keys (including `todos`) are read via `projections.faceOf` / `useProjection`, not via `ConversationSnapshot`. The store also publishes one reference-stable whole-value map through `SessionSummary.projectionValues`, allowing global list consumers to reuse the same projections without creating per-session subscriptions.
`bindSettingsScope` is the browser mirror of the Host-side settings owner seam for one domain-owned namespace. It subscribes before starting a nonblocking initial read, publishes a uSES snapshot (status, section value, revision, writability, host/memory mode), serializes `set` writes with the latest known namespace revision, suppresses stale publications, recovers a rejected latest write from Host state, and reaches quiescence on plugin disposal. The default decoder validates each section against the namespace's own serialized wire schema (rehydrated through dsh-client-schema-form), so a domain adds a decoder only to narrow beyond that schema. Loopback pages use the Host settings API; remote pages stay in memory mode. Domain packages own the namespace schema, default, and live service rather than putting product policy in runtime.
## Slot declaration injection
`ctx.slots.inject(name, callback)` makes a full `SlotMap` key the dependency for a contribution whose plugin can activate independently from the declaring entry. It runs `callback` synchronously when the declaration exists, otherwise waits; declaration collapse disposes the callback effect, and redeclaration reruns it. The controller belongs to the caller's plugin fiber, so unloading the contributor cancels either the wait or its active registrations. A direct `slots.register()` into an undeclared slot still throws.
@@ -42,17 +41,17 @@ Each `Session` gives its contiguous event window to a `ConversationNodeAssembler
Definition authors keep matching local to the current event, give every correlated event a stable business id, and make updates replayable by log `seq`; renderers consume final Node data and constrained Location values rather than scanning Session or Chat collections. The [Conversation Node cookbook](../../../docs/cookbook/adding-a-conversation-node.md) gives the complete registration and pagination path.
`ui-conversation` registers the built-in Chat Definitions and the keyed Chat snapshot builder. Append-origin user, assistant, and Tool results remain the human record; model-only replacement copies stay out, except that a compaction checkpoint becomes its own marker and resolves missing summary provenance when an older page supplies it. Durable inbox splice Contexts classify next-step user messages as steering without making inbox state a Session special case. Context messages retain producer provenance and form. StatsLine reads `ConversationSnapshot.chat.legacy.nodes`, while Session mirrors that legacy slice into the top-level `nodes`, `partial`, and `runningCalls` public compatibility fields without running a second business fold. Trajectory consumes neither compatibility surface; its activated `session-history` inspection keeps an independent fold until it gains its own registered target.
`ui-conversation` registers the built-in Chat Definitions and the keyed Chat snapshot builder. Append-origin user, assistant, and Tool results remain the human record; model-only replacement copies stay out, except that a compaction checkpoint becomes its own marker and resolves missing summary provenance when an older page supplies it. Durable inbox splice Contexts classify next-step user messages as steering without making inbox state a Session special case. Context messages retain producer provenance and form. StatsLine reads `ConversationSnapshot.chat.legacy.nodes`, while Session mirrors that legacy slice into the top-level `nodes`, `partial`, and `runningCalls` public compatibility fields without running a second business fold. `ui-trajectory` registers independent Definitions and a target builder over the same Session window; it preserves the existing stage-oriented view model without consuming the Chat compatibility fields or running another history fold.
The Chat builder keeps one mutable keyed store per Session. Content updates notify only the affected node key, structural changes rebuild order and Location membership, and a prepend adds rows without replacing existing keyed values. Assistant chunks update Definition State for every event but request at most one materialization per animation frame; final messages and Turn/Step closure publish immediately. See the [client Tool presentation decision](../../../.agents/notes/implemented/architecture/2026-08-08-client-tool-presentation-ownership.md).
## Request inspection
## Trajectory request data
`SessionHistoryInspection.requests` is one chronological, purpose-discriminated provider-request stream. Assistant requests always carry their numeric `turn` and `step`; compaction requests carry `step: 0` and a `turn` owner that may be `null`. That null owner means a manual compaction ran standalone between turns, not that it belongs to either adjacent turn. A `session/end-seed` boundary closes an unmatched compaction request as an error at the boundary time with `Compaction was interrupted before completion.`; a later start projects as an independent request instead of overwriting the orphan.
Trajectory Definitions assemble one chronological, purpose-discriminated provider-request stream. Assistant requests always carry their numeric `turn` and `step`; compaction requests carry `step: 0` and a `turn` owner that may be `null`. That null owner means a manual compaction ran standalone between turns, not that it belongs to either adjacent turn. A `session/end-seed` boundary closes an unmatched compaction request as an error at the boundary time with `Compaction was interrupted before completion.`; a later start projects as an independent request instead of overwriting the orphan.
## Code Mode child-call tree
Every `ToolCallBlock` recursively owns its children through `subCalls`, in start order. Chat's Tool Definition correlates root calls and results by call id, folds Code Dispatch start/settlement records into that root Context, and projects one keyed recursive tree; child calls never become independent Chat roots. When a start falls outside the loaded window, its settlement remains renderable with `callTime: null`. A child update copies only its ancestor path, so unchanged siblings retain object identity. Edges that introduce a cycle or exceed the fixed 256-call depth limit are consumed without mutating the tree. The separate Trajectory history fold still uses Runtime's `ToolCallTree` over the same nested data contract.
Every `ToolCallBlock` recursively owns its children through `subCalls`, in start order. Chat's Tool Definition correlates root calls and results by call id, folds Code Dispatch start/settlement records into that root Context, and projects one keyed recursive tree; child calls never become independent Chat roots. When a start falls outside the loaded window, its settlement remains renderable with `callTime: null`. A child update copies only its ancestor path, so unchanged siblings retain object identity. Edges that introduce a cycle or exceed the fixed 256-call depth limit are consumed without mutating the tree. Trajectory's Tool Definition independently assembles the same nested data contract for its target.
## Session title projection

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[English](README.md) | 中文
客户端 cordis 启动与不依赖 React 的对象服务SlotsService 包装 SlotCore 并提供 renderer 数据源SessionsService 拥有 Session 对象以及 Chat 所需的列表、scope 和事件窗口状态SessionHistoryService 为检查类消费方惰性拥有彼此独立的原始历史账本,先加载当前尾部,并仅在消费方请求时向前补入一页更早历史。每份历史快照都会公开原始窗口的绝对基准序号,因此即使该页没有新增任何 surface 可见节点,消费方仍能检测到向前补页。WorkspacesService 依赖 SessionsService拥有 Workspace 对象、列表/操作、默认目标派生,以及 New Session 空会话复用入口(`connectWorkspace`)。运行时把共享 Host 流分发给 SessionWorkspace 和已激活的历史数据所有者,不让检查状态经过 Session 或 SessionManager,并把注册表失效帧桥接为类型化 ctx 事件(`commands/changed``session/preset-changed``settings/changed``credentials/changed``models/changed`),使各表面缓存无需触碰流即可重拉。`host/session-preset-changed` 还会把其中的 preset 折进会话行,因为这次切换的 RPC 回执只会到达发起它的那个客户端。客户端会话一律由 Host 创建(一次 `session.create` 同时产生 Session、agent智能体和 cwd客户端不持有任何实体化之前的会话状态——agent scopehost dsh-scope 的客户端镜像,以 agent/session 共用 id 为键)在会话行进入列表镜像时创建,并随 prune 销毁。每个 `Session` 持有一个通用的 `ProjectionValueStore`,由历史记录尾部的 `projections` 块播种,并经 `session/projection` 帧按 seq 高者胜更新;领域键(含 `todos`)经 `projections.faceOf``useProjection` 读取,不经 `ConversationSnapshot`。该 store 还会通过 `SessionSummary.projectionValues` 发布一份引用稳定的完整值映射,使全局列表消费方无需为每个会话创建订阅,即可复用同一组投影。
客户端 cordis 启动与不依赖 React 的对象服务SlotsService 包装 SlotCore 并提供 renderer 数据源SessionsService 拥有 Session 对象、列表与 scope 状态,以及供已注册 conversation view target 共用的事件窗口与历史分页。WorkspacesService 依赖 SessionsService拥有 Workspace 对象、列表/操作、默认目标派生,以及 New Session 空会话复用入口(`connectWorkspace`)。运行时把共享 Host 流分发给 SessionWorkspace 所有者,并把注册表失效帧桥接为类型化 ctx 事件(`commands/changed``session/preset-changed``settings/changed``credentials/changed``models/changed`),使各表面缓存无需触碰流即可重拉。`host/session-preset-changed` 还会把其中的 preset 折进会话行,因为这次切换的 RPC 回执只会到达发起它的那个客户端。客户端会话一律由 Host 创建(一次 `session.create` 同时产生 Session、agent智能体和 cwd客户端不持有任何实体化之前的会话状态——agent scopehost dsh-scope 的客户端镜像,以 agent/session 共用 id 为键)在会话行进入列表镜像时创建,并随 prune 销毁。约定api-contracts v3 §4。每个 `Session` 持有一个通用的 `ProjectionValueStore`,由历史记录尾部的 `projections` 块播种,并经 `session/projection` 帧按 seq 高者胜更新;领域键(含 `todos`)经 `projections.faceOf``useProjection` 读取,不经 `ConversationSnapshot`。该 store 还会通过 `SessionSummary.projectionValues` 发布一份引用稳定的完整值映射,使全局列表消费方无需为每个会话创建订阅,即可复用同一组投影。
`bindSettingsScope` 面向单个由领域持有的 namespace是 Host 侧 settings owner seam 的浏览器镜像。它在开始非阻塞初始读取前建立订阅,发布 uSES 快照状态、分节值、revision、可写性、host内存模式使用已知最新 namespace revision 串行执行 `set` 写入,抑制陈旧发布,并在最新写入被拒时从 Host 状态恢复;插件释放时,它会达到完全停稳。默认解码器会对照该 namespace 自身的序列化 wire schema经 dsh-client-schema-form 还原)校验每个分节,因此领域只有在需要比该 schema 进一步收窄时才添加解码器。回环页面使用 Host settings API远程页面则停留在内存模式。namespace schema、默认值与实时服务归领域包所有而非把产品政策放入运行时。
## Slot 声明注入
`ctx.slots.inject(name, callback)` 将完整的 `SlotMap` key 作为贡献项的依赖,适用于贡献方插件可独立于声明条目激活的情形。声明存在时,它会同步运行 `callback`,否则等待;声明折叠会 dispose资源释放回调 effect重新声明则会再次运行回调。控制器归调用方的插件 fiber 所有,因此卸载贡献方会取消等待或移除其活跃注册项。直接调用 `slots.register()` 向未声明 slot 注册仍会抛出异常。
@@ -42,17 +41,17 @@ SlotsService 分别为 renderer 提供 `useSessions` 与 `useWorkspaces` 的裸
Definition 作者只根据当前事件完成匹配,为每条关联事件提供稳定业务 id并保证 update 能按日志 `seq` 回放renderer 只消费最终 Node data 与受限 Location value不扫描 Session 或 Chat 集合。完整注册和分页路径见 [Conversation Node 实操手册](../../../docs/cookbook/adding-a-conversation-node.md)。
`ui-conversation` 注册内建 Chat Definition 与 keyed Chat snapshot builder。append 来源的 user、assistant 和 Tool result 构成人类可见记录;仅供模型使用的 replacement 副本不进入 Chatcompaction 检查点除外,它会成为独立标记,并在更早分页补齐 summary 溯源后更新。持久 inbox splice Context 能把 next-step 用户消息判定为 steering无须让 inbox 状态成为 Session 特例。上下文消息保留生产者 provenance 与 form。StatsLine 读取 `ConversationSnapshot.chat.legacy.nodes`Session 则把该 legacy slice 镜像到顶层 `nodes``partial``runningCalls` 公共兼容字段,无须运行第二套业务 fold。Trajectory 不消费这两种兼容表面;在它获得独立注册 target 之前,已激活的 `session-history` inspection 继续维护独立 fold。
`ui-conversation` 注册内建 Chat Definition 与 keyed Chat snapshot builder。append 来源的 user、assistant 和 Tool result 构成人类可见记录;仅供模型使用的 replacement 副本不进入 Chatcompaction 检查点除外,它会成为独立标记,并在更早分页补齐 summary 溯源后更新。持久 inbox splice Context 能把 next-step 用户消息判定为 steering无须让 inbox 状态成为 Session 特例。上下文消息保留生产者 provenance 与 form。StatsLine 读取 `ConversationSnapshot.chat.legacy.nodes`Session 则把该 legacy slice 镜像到顶层 `nodes``partial``runningCalls` 公共兼容字段,无须运行第二套业务 fold。`ui-trajectory` 在同一个 Session 窗口上注册独立 Definition 与 target builder它保留现有的 stage-oriented view model既不消费 Chat 兼容字段,也不运行另一套 history fold。
Chat builder 为每个 Session 保留一个 mutable keyed store。内容更新只通知受影响的 node key结构变化才重建顺序和 Location 成员关系prepend 只增加行,不替换既有 keyed value。每个 Assistant chunk 都会更新 Definition State但最多每个 animation frame 请求一次物化final message 与 Turn/Step 关闭会立即发布。参见 [Client Tool 展示所有权决策](../../../.agents/notes/implemented/architecture/2026-08-08-client-tool-presentation-ownership.md)。
## 请求检查
## Trajectory 请求数据
`SessionHistoryInspection.requests`一条按时间顺序排列、以用途为判别字段的提供方请求流。助手请求始终携带数值型 `turn``step`;压缩请求携带 `step: 0`,其 `turn` 所有者可以是 `null`。这个 null 所有者表示手动压缩独立运行在两个轮次之间,并不表示它属于任一相邻轮次。`session/end-seed` 边界会在边界时刻将未匹配的压缩请求以错误状态结束,错误固定为 `Compaction was interrupted before completion.`;后续 start 会投影为独立请求,而不会覆盖这项遗留的未匹配请求。
Trajectory Definition 组装出一条按时间顺序排列、以用途为判别字段的提供方请求流。助手请求始终携带数值型 `turn``step`;压缩请求携带 `step: 0`,其 `turn` 所有者可以是 `null`。这个 null 所有者表示手动压缩独立运行在两个轮次之间,并不表示它属于任一相邻轮次。`session/end-seed` 边界会在边界时刻将未匹配的压缩请求以错误状态结束,错误固定为 `Compaction was interrupted before completion.`;后续 start 会投影为独立请求,而不会覆盖这项遗留的未匹配请求。
## Code Mode 子调用树
每个 `ToolCallBlock` 都通过 `subCalls` 按启动顺序递归拥有自己的子调用。Chat 的 Tool Definition 按 call id 关联 root call 与 result把 Code Dispatch 的 start/settlement 记录折叠进该 root Context并投影为一棵 keyed 递归树child call 不会成为独立 Chat root。start 落在已加载窗口之外时,其 settlement 仍以 `callTime: null` 渲染。一次 child 更新只复制其祖先链,因此未变化的 sibling 保持对象身份。会引入环或超过固定 256 层深度上限的边会被消费,但不会修改树。独立的 Trajectory history fold 仍通过 Runtime 的 `ToolCallTree` 生成同一种嵌套数据契约。
每个 `ToolCallBlock` 都通过 `subCalls` 按启动顺序递归拥有自己的子调用。Chat 的 Tool Definition 按 call id 关联 root call 与 result把 Code Dispatch 的 start/settlement 记录折叠进该 root Context并投影为一棵 keyed 递归树child call 不会成为独立 Chat root。start 落在已加载窗口之外时,其 settlement 仍以 `callTime: null` 渲染。一次 child 更新只复制其祖先链,因此未变化的 sibling 保持对象身份。会引入环或超过固定 256 层深度上限的边会被消费但不会修改树。Trajectory 的 Tool Definition 为自己的 target 独立组装同一种嵌套数据契约。
## Session 标题投影

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@@ -46,7 +46,6 @@
"@deepseek-ai/dsh-client-connection": "workspace:^",
"@deepseek-ai/dsh-client-schema-form": "workspace:^",
"@deepseek-ai/dsh-commands": "workspace:^",
"@deepseek-ai/dsh-compact": "workspace:^",
"@deepseek-ai/dsh-client-ui-slots": "workspace:^",
"@deepseek-ai/dsh-host-apiproxy": "workspace:^",
"@deepseek-ai/dsh-llm": "workspace:^",

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@@ -116,7 +116,7 @@ export interface ConversationViewSnapshotMap {}
/** Stable reader over the latest snapshot of every registered view target. */
export interface ConversationViewSnapshotStore {
/** @param target - registered view target. @returns its current snapshot. */
get<Target extends keyof ConversationViewSnapshotMap & string>(
get<Target extends Extract<keyof ConversationViewSnapshotMap, string>>(
target: Target,
): ConversationViewSnapshotMap[Target] | undefined
}

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@@ -324,7 +324,7 @@ export class ConversationNodeAssembler implements ConversationViewSnapshotStore
return this.views.get(target)?.snapshot
}
get<Target extends keyof ConversationViewSnapshotMap & string>(
get<Target extends Extract<keyof ConversationViewSnapshotMap, string>>(
target: Target,
): ConversationViewSnapshotMap[Target] | undefined {
return this.snapshot(target) as ConversationViewSnapshotMap[Target] | undefined