feat(client-runtime): add target-owned conversation snapshots

packages/client/ui-conversation/src/client/conversation-nodes/assistant.ts

@@ -242,6 +242,7 @@ function projectAssistant(context: ConversationNodeContext<AssistantState>): Ass
 /** Per-step Assistant streaming/final/interruption Definition. */
 export const assistantDefinition: ConversationNodeDefinition<AssistantState> = {
   kind: 'assistant-step',
+  target: 'chat',
   match: (event) => {
     if (event.type === 'step/start') return { id: `${event.data.turn}:${event.data.step}`, role: 'start' }
     if (event.type === 'assistant/chunk'
@@ -291,8 +292,7 @@ export const assistantDefinition: ConversationNodeDefinition<AssistantState> = {
       value: projected.data,
     }
   },
-  buildViewNode: (context, target) => {
-    if (target !== 'chat') return null
+  buildViewNode: (context) => {
     const projected = projectAssistant(context)
     if (projected === undefined) return null
     if (projected.settled === undefined && !projected.visible) {

packages/client/ui-conversation/src/client/conversation-nodes/command.ts

@@ -175,6 +175,7 @@ export function updateCompactionState<State extends CompactionEvidence>(
 /** Slash-command lifecycle, including integrated manual compaction, Definition. */
 export const commandDefinition: ConversationNodeDefinition<CommandState> = {
   kind: 'command',
+  target: 'chat',
   match: (event) => {
     if (event.type === 'command/run') {
       return { id: String(event.data.commandId), role: 'start' }
@@ -202,8 +203,7 @@ export const commandDefinition: ConversationNodeDefinition<CommandState> = {
     }
     return updateCompactionState(context.state, match)
   },
-  buildViewNode: (context, target) => {
-    if (target !== 'chat') return null
+  buildViewNode: (context) => {
     const state = context.state ?? fallbackState(context)
     if (state === undefined) return null
     if (state.command.name !== 'compact') {

packages/client/ui-conversation/src/client/conversation-nodes/compaction.ts

@@ -30,6 +30,7 @@ function fallbackState(context: ConversationNodeContext<CompactionState>): Compa
 /** Automatic compaction lifecycle and landed checkpoint Definition. */
 export const compactionDefinition: ConversationNodeDefinition<CompactionState> = {
   kind: 'compaction',
+  target: 'chat',
   match: (event) => {
     const checkpoint = compactSource(event)
     if (checkpoint !== undefined && checkpoint.sourceCommandId === undefined) {
@@ -47,8 +48,7 @@ export const compactionDefinition: ConversationNodeDefinition<CompactionState> =
   },
   start: () => ({}),
   update: (context, match) => updateCompactionState(context.state, match),
-  buildViewNode: (context, target) => {
-    if (target !== 'chat') return null
+  buildViewNode: (context) => {
     const state = context.state ?? fallbackState(context)
     if (state.checkpoint === undefined) return null
     const marker = compactSummary(state.summary, state.checkpoint)

packages/client/ui-conversation/src/client/conversation-nodes/fallback.ts

@@ -15,6 +15,7 @@ declare module '@deepseek-ai/dsh-client-ui-conversation/client' {
 /** Unclaimed append-surface fallback Definition. */
 export const unknownFallbackDefinition: ConversationNodeDefinition<UnknownSurfaceNode> = {
   kind: 'unknown-surface',
+  target: 'chat',
   match: event => isAppendSurfaceEvent(event)
     ? { id: String(event.seq), role: 'start' }
     : null,
@@ -26,7 +27,7 @@ export const unknownFallbackDefinition: ConversationNodeDefinition<UnknownSurfac
     data: match.event.data,
   }),
   update: context => context.state,
-  buildViewNode: (context, target) => target !== 'chat' || context.state === undefined
+  buildViewNode: context => context.state === undefined
     ? null
     : chatNode(context, 'unknown', context.state.seq, context.state),
 }

packages/client/ui-conversation/src/client/conversation-nodes/inbox.ts

@@ -50,7 +50,6 @@ function inboxDefinition(target: InboxTarget): ConversationNodeDefinition<InboxS
     },
     update: context => context.state,
     publication: () => 'none',
-    buildViewNode: () => null,
   }
 }
 

packages/client/ui-conversation/src/client/conversation-nodes/message.ts

@@ -30,6 +30,7 @@ function isCompactionCheckpoint(event: Parameters<ConversationNodeDefinition['ma
 /** User, steering, and injected-context message classification Definition. */
 export const messageDefinition: ConversationNodeDefinition<MessageNode> = {
   kind: 'input-message',
+  target: 'chat',
   match: event => event.type === 'user/message'
     && isAppendSurfaceEvent(event)
     && !isCompactionCheckpoint(event)
@@ -68,8 +69,8 @@ export const messageDefinition: ConversationNodeDefinition<MessageNode> = {
       }
   },
   update: context => context.state,
-  buildViewNode: (context, target) => {
-    if (target !== 'chat' || context.state === undefined) return null
+  buildViewNode: (context) => {
+    if (context.state === undefined) return null
     return chatNode(context, context.state.kind, context.state.seq, context.state)
   },
 }

packages/client/ui-conversation/src/client/conversation-nodes/retry.ts

@@ -40,6 +40,7 @@ function isClosed(location: ConversationLocation): boolean {
 /** Producer-correlated model retry chain Definition. */
 export const retryDefinition: ConversationNodeDefinition<RetryState> = {
   kind: 'model-retry',
+  target: 'chat',
   match: (event) => {
     if (event.type === 'llm/retry') {
       const retryId: unknown = event.data.retryId
@@ -70,8 +71,8 @@ export const retryDefinition: ConversationNodeDefinition<RetryState> = {
         attempt.retry === retry ? { ...attempt, retryState: 'started' } : attempt),
     }
   },
-  buildViewNode: (context, target) => {
-    if (target !== 'chat' || context.state === undefined || context.state.attempts.length === 0) return null
+  buildViewNode: (context) => {
+    if (context.state === undefined || context.state.attempts.length === 0) return null
     const location = context.start?.location ?? context.matches[0]?.location ?? { kind: 'unresolved' as const }
     const stateAttempts = context.state.attempts
     const attempts = stateAttempts.map((attempt, index) =>

packages/client/ui-conversation/src/client/conversation-nodes/tool.ts

@@ -235,6 +235,7 @@ function fallbackState(context: ConversationNodeContext<ToolState>): ToolState |
 /** Root Tool lifecycle and nested Code Dispatch Definition. */
 export const toolDefinition: ConversationNodeDefinition<ToolState> = {
   kind: 'tool-call',
+  target: 'chat',
   match: (event) => {
     if (event.type === 'tool/call') return { id: String(event.data.callId), role: 'start' }
     if (event.type === 'tool/result' && isAppendSurfaceEvent(event)) {
@@ -257,8 +258,7 @@ export const toolDefinition: ConversationNodeDefinition<ToolState> = {
     }
     return updateDispatch(context.state, match)
   },
-  buildViewNode: (context, target) => {
-    if (target !== 'chat') return null
+  buildViewNode: (context) => {
     const state = context.state ?? fallbackState(context)
     if (state === undefined) return null
     const projected = projectBlock(state.root, state, interruption(context))

packages/client/ui-conversation/src/client/conversation-nodes/turn-error.ts

@@ -63,6 +63,7 @@ function fallbackState(context: ConversationNodeContext<TurnErrorState>): TurnEr
 /** Terminal turn failure Definition, suppressed when the turn owns a retry chain. */
 export const turnErrorDefinition: ConversationNodeDefinition<TurnErrorState> = {
   kind: 'turn-error',
+  target: 'chat',
   match: (event) => {
     if (event.type === 'turn/start') return { id: String(event.data.turn), role: 'start' }
     if (event.type === 'turn/end' && event.data.reason.kind === 'error') {
@@ -82,8 +83,7 @@ export const turnErrorDefinition: ConversationNodeDefinition<TurnErrorState> = {
       ? { ...context.state, hidden: true }
       : context.state
   },
-  buildViewNode: (context, target) => {
-    if (target !== 'chat') return null
+  buildViewNode: (context) => {
     const state = context.state ?? fallbackState(context)
     if (state?.failure === undefined) return null
     const failure = state.failure

packages/client/ui-conversation/src/client/conversation-nodes/turn-tail.ts

@@ -151,6 +151,7 @@ function tailData(context: ConversationNodeContext<TurnTailState>): TurnTailChat
 /** Completed-turn footer Definition independent of any Assistant row. */
 export const turnTailDefinition: ConversationNodeDefinition<TurnTailState> = {
   kind: 'turn-tail',
+  target: 'chat',
   match: (event) => {
     if (event.type === 'turn/start') return { id: String(event.data.turn), role: 'start' }
     if (event.type === 'turn/end') return { id: String(event.data.turn), role: 'update' }
@@ -179,8 +180,7 @@ export const turnTailDefinition: ConversationNodeDefinition<TurnTailState> = {
       value,
     }
   },
-  buildViewNode: (context, target) => {
-    if (target !== 'chat') return null
+  buildViewNode: (context) => {
     const turn = turnLocation(context)
     const data = turn?.data.get('turn-tail')
     return data === undefined ? null : chatNode(context, 'turn-tail', closingAnchor(context), data)