feat(ui): expand request trajectory inspection

packages/client/runtime/src/client/index.ts

@@ -28,7 +28,8 @@ export type {
   EngineStoreHandle, EngineStoreInstance, ObservableSnapshot, SnapshotStore,
 } from './contract/store.ts'
 export type {
-  AssistantBlock, AssistantMessageNode, AssistantTiming, CodeSubCall, ComposerPhase, ContextMessageNode,
+  AssistantBlock, AssistantMessageNode, AssistantProvenanceView, AssistantRequestConfig,
+  AssistantTiming, CodeSubCall, ComposerPhase, ContextMessageNode,
   ConversationContext, ConversationContextOriginKind, ConversationNode, ConversationPromptSnapshot,
   ConversationSnapshot, QueuedMessage, RunningToolCall,
   SteeringMessageNode, ToolResultNode, UnknownSurfaceNode, UserMessageNode,

packages/client/runtime/src/client/sessions/conversation.ts

@@ -60,6 +60,23 @@ export interface AssistantTiming {
   completedTime: number
 }
 
+/** Request configuration recorded in the effective header for one assistant response. */
+export interface AssistantRequestConfig {
+  provider: string
+  model: string
+  thinking?: string
+  reasoningEffort?: string
+  temperature?: number
+  maxTokens?: number
+  stop?: readonly string[]
+}
+
+/** Stable provider/model identity attached to one assistant response. */
+export interface AssistantProvenanceView {
+  provider: string
+  model: string
+}
+
 /** A finalized (or interruption-frozen) assistant message. */
 export interface AssistantMessageNode {
   kind: 'assistant'
@@ -70,6 +87,8 @@ export interface AssistantMessageNode {
   step: number
   blocks: readonly AssistantBlock[]
   usage?: unknown
+  provenance?: AssistantProvenanceView
+  requestConfig?: AssistantRequestConfig
   /** Timing derived from the recorded step/chunk/message event sequence. */
   timing?: AssistantTiming
   /** Frozen partial of an aborted turn (no finalize ever arrives): rendered with a 已停止 marker.
@@ -211,6 +230,8 @@ export type ConversationContextOriginKind = 'compaction' | 'rewind' | 'rewrite'
 
 /** Latest complete model request header in force within one context generation. */
 export interface ConversationPromptSnapshot {
+  /** Provider/model and sampling configuration from the latest effective request header. */
+  config?: AssistantRequestConfig
   /** Rendered system prompt text; empty when the request had no system prompt. */
   system: string
   /** Complete tool catalog sent with the request, including tools that were never called. */

packages/client/runtime/src/client/sessions/fold-adapter.ts

@@ -12,7 +12,7 @@ import {
 } from '@deepseek-ai/dsh-session/surface'
 import type { ToolCallView, ToolEventView, ToolResultView } from '@deepseek-ai/dsh-client-connection/client'
 import type {
-  AssistantTiming, ConversationContext, ConversationContextOriginKind, ConversationNode,
+  AssistantRequestConfig, AssistantTiming, ConversationContext, ConversationContextOriginKind, ConversationNode,
   ConversationPromptSnapshot,
 } from './conversation.ts'
 import { toAssistantBlocks } from './conversation.ts'
@@ -43,6 +43,7 @@ function materializeNode(
   callIndex: ReadonlyMap<string, CallIndexEntry>,
   resultView: ToolResultView | null,
   assistantTiming?: AssistantTiming,
+  requestConfig?: AssistantRequestConfig,
 ): ConversationNode {
   switch (event.type) {
     case 'user/message':
@@ -64,6 +65,11 @@ function materializeNode(
         kind: 'assistant', seq: event.seq, time: event.time,
         turn: event.data.turn, step: event.data.step,
         blocks: toAssistantBlocks(event.data.content), usage: event.data.usage,
+        provenance: {
+          provider: event.data.provenance.provider,
+          model: event.data.provenance.model,
+        },
+        ...(requestConfig === undefined ? {} : { requestConfig }),
         ...(assistantTiming !== undefined ? { timing: assistantTiming } : {}),
       }
     case 'steering/message':
@@ -204,6 +210,7 @@ export class FoldAdapter {
         this.callIdx,
         this.resultViews.get(seq) ?? null,
         event.type === 'assistant/message' ? this.assistantTiming(event) : undefined,
+        event.type === 'assistant/message' ? this.assistantRequestConfig(event) : undefined,
       )
       this.nodeCache.set(seq, node)
       out.push(node)
@@ -280,6 +287,7 @@ export class FoldAdapter {
       this.callIdx,
       this.resultViews.get(seq) ?? null,
       event.type === 'assistant/message' ? this.assistantTiming(event) : undefined,
+      event.type === 'assistant/message' ? this.assistantRequestConfig(event) : undefined,
     )
     this.nodeCache.set(seq, node)
     return node
@@ -312,6 +320,17 @@ export class FoldAdapter {
     return { stepStartTime, firstTokenTime, completedTime: event.time }
   }
 
+  private assistantRequestConfig(
+    event: SessionEvent<'assistant/message'>,
+  ): AssistantRequestConfig | undefined {
+    for (let i = event.seq; i >= this.baseSeq; i--) {
+      const candidate = this.padded[i]
+      if (candidate?.type !== 'request/header') continue
+      return candidate.data.header.config
+    }
+    return undefined
+  }
+
   private indexCall(event: SessionEvent, view?: ToolEventView): void {
     if (event.type === 'tool/result') {
       if (view?.for === 'result') this.resultViews.set(event.seq, view.view)
@@ -336,6 +355,7 @@ export class FoldAdapter {
     }
     if (event.type !== 'request/header') return
     this.activePrompt = {
+      config: event.data.header.config,
       system: event.data.header.system ?? '',
       tools: event.data.header.tools ?? [],
     }

packages/client/ui-trajectory/src/client/TrajectoryGroupHeader.tsx

@@ -5,7 +5,7 @@ import css from './TrajectoryGroupHeader.module.css'
 export interface TrajectoryGroupHeaderProps {
   /** Group title (`Message`, `Step 1`, …). */
   title: string
-  /** Secondary summary (`49s`, `2.2s skill`, …). */
+  /** Secondary summary (`49 s`, `2.2 s skill`, …). */
   description?: string
 }
 

packages/client/ui-trajectory/src/client/TrajectoryTable.module.css

@@ -699,6 +699,26 @@
   padding-left: 12px;
 }
 
+.usagePanel {
+  padding: 4px 0 10px;
+}
+
+.usageGroup + .usageGroup {
+  margin-top: 8px;
+}
+
+.usageHeading {
+  margin: 0;
+  padding: 4px 14px 1px;
+  color: var(--dsw-alias-label-secondary);
+  font: var(--dsw-font-xs-strong-13);
+  user-select: none;
+}
+
+.usageGroup .overview {
+  padding: 0;
+}
+
 .overview dt {
   color: var(--dsw-alias-label-tertiary);
 }

packages/client/ui-trajectory/src/client/TrajectoryTable.tsx

@@ -5,7 +5,9 @@ import type { CSSProperties, ReactNode } from 'react'
 import {
   extractMarkdownPlainText, IconChevronRightOutline14, JsonTree, MarkdownText,
 } from '@deepseek-ai/dsh-client-ui-primitives'
-import type { ConversationPromptSnapshot } from '@deepseek-ai/dsh-client-runtime/client'
+import type {
+  AssistantRequestConfig, ConversationPromptSnapshot,
+} from '@deepseek-ai/dsh-client-runtime/client'
 import type {
   AssistantMetricDetail, TrajectoryCellKind, TrajectoryCellProps, TrajectorySourceBlock,
 } from './trajectory-record.ts'
@@ -41,6 +43,8 @@ type DetailTab =
   | 'input'
   | 'output'
   | 'schema'
+  | 'options'
+  | 'usage'
   | 'timing'
 type RecordState = 'complete' | 'running' | 'error'
 
@@ -89,6 +93,8 @@ const SYSTEM_PROMPT_TABS: readonly DetailTabItem[] = [
 ]
 const REQUEST_TABS: readonly DetailTabItem[] = [
   { id: 'overview', label: 'Summary' },
+  { id: 'options', label: 'Options' },
+  { id: 'usage', label: 'Usage' },
   { id: 'timing', label: 'Timing' },
 ]
 
@@ -172,14 +178,6 @@ function AssistantTimingPanel({ metrics }: { metrics: AssistantMetricDetail }) {
       <div><dt>TTFT</dt><dd>{ttft(metrics)}</dd></div>
       <div><dt>Generation</dt><dd>{generationTime(metrics)}</dd></div>
       <div><dt>Throughput</dt><dd>{throughput(metrics)}</dd></div>
-      <div>
-        <dt>Output tokens</dt>
-        <dd>
-          {!metrics.usageProvided
-            ? 'Usage unavailable'
-            : metrics.outputTokens ?? 'Output tokens unavailable'}
-        </dd>
-      </div>
     </dl>
   )
 }
@@ -188,6 +186,8 @@ function AssistantTimingPanel({ metrics }: { metrics: AssistantMetricDetail }) {
 export interface TrajectoryTableProps {
   /** Latest model request header in force for the selected context. */
   prompt?: ConversationPromptSnapshot
+  /** Session-global request numbers for the request groups visible in this context. */
+  requestNumbers?: readonly TrajectoryRequestNumber[]
   /** Grouped records in display order. */
   turns: readonly TrajectoryTurnModel[]
   /** Turn ids whose rows after the first are folded into a summary. */
@@ -200,6 +200,27 @@ export interface TrajectoryTableProps {
   onToggleAssistant(index: number): void
 }
 
+/** One context-local request identity paired with its session-global number. */
+export interface TrajectoryRequestNumber {
+  turn: number
+  step: number
+  number: number
+  provider?: string
+  model?: string
+  requestConfig?: AssistantRequestConfig
+  usage?: TrajectoryUsage
+  cumulativeUsage?: TrajectoryUsage
+}
+
+/** Disjoint provider token buckets for one request or a session prefix. */
+export interface TrajectoryUsage {
+  input?: number
+  cacheRead?: number
+  cacheWrite?: number
+  output?: number
+  reasoning?: number
+}
+
 function flattenRecords(turns: readonly TrajectoryTurnModel[]): TableRecord[] {
   return turns.flatMap((turn) => {
     let firstInTurn = true
@@ -223,12 +244,35 @@ function flattenRecords(turns: readonly TrajectoryTurnModel[]): TableRecord[] {
   })
 }
 
-function requestNumber(group: string): number | undefined {
+function requestStep(group: string): number | undefined {
   if (!group.startsWith('Step ')) return undefined
   const value = Number(group.slice('Step '.length))
   return Number.isInteger(value) && value > 0 ? value : undefined
 }
 
+function requestKey(turn: number, group: string): string {
+  return `${turn}\u0000${group}`
+}
+
+function indexRequestNumbers(
+  records: readonly TableRecord[],
+  sessionNumbers: readonly TrajectoryRequestNumber[] | undefined,
+): ReadonlyMap<string, number> {
+  const numbers = new Map<string, number>()
+  for (const request of sessionNumbers ?? []) {
+    numbers.set(requestKey(request.turn, `Step ${request.step}`), request.number)
+  }
+  let next = Math.max(0, ...numbers.values()) + 1
+  const boundaries = records
+    .filter(record => record.groupStart && requestStep(record.group) !== undefined)
+    .sort((left, right) => left.cell.index - right.cell.index)
+  for (const record of boundaries) {
+    const key = requestKey(record.turn, record.group)
+    if (!numbers.has(key)) numbers.set(key, next++)
+  }
+  return numbers
+}
+
 function summarizeTurn(records: readonly TableRecord[]): string {
   const userText = records
     .filter(record => record.cell.kind === 'user')
@@ -381,6 +425,94 @@ function tokenSummary(cell: TrajectoryCellProps): ReactNode {
   )
 }
 
+function inputTotal(usage: TrajectoryUsage): number | undefined {
+  if (
+    usage.input === undefined
+    && usage.cacheRead === undefined
+    && usage.cacheWrite === undefined
+  ) return undefined
+  return (usage.input ?? 0) + (usage.cacheRead ?? 0) + (usage.cacheWrite ?? 0)
+}
+
+function UsageRows({ usage }: { usage: TrajectoryUsage | undefined }) {
+  if (usage === undefined) return <p className={css.noPayload}>Usage not reported</p>
+  const totalInput = inputTotal(usage)
+  return (
+    <dl className={css.overview}>
+      {totalInput !== undefined && (
+        <div><dt>Input</dt><dd>{totalInput} tok</dd></div>
+      )}
+      {usage.cacheRead !== undefined && (
+        <div className={css.requestTokenDetail}>
+          <dt>Cached</dt>
+          <dd>{usage.cacheRead} tok</dd>
+        </div>
+      )}
+      {usage.cacheWrite !== undefined && (
+        <div className={css.requestTokenDetail}>
+          <dt>Cache created</dt>
+          <dd>{usage.cacheWrite} tok</dd>
+        </div>
+      )}
+      {usage.input !== undefined && (
+        <div className={css.requestTokenDetail}>
+          <dt>Other</dt>
+          <dd>{usage.input} tok</dd>
+        </div>
+      )}
+      {usage.output !== undefined && (
+        <div><dt>Output</dt><dd>{usage.output} tok</dd></div>
+      )}
+      {usage.reasoning !== undefined && (
+        <div className={css.requestTokenDetail}>
+          <dt>Reasoning</dt>
+          <dd>{usage.reasoning} tok</dd>
+        </div>
+      )}
+    </dl>
+  )
+}
+
+function RequestUsagePanel({
+  usage,
+  cumulative,
+}: {
+  usage: TrajectoryUsage | undefined
+  cumulative: TrajectoryUsage | undefined
+}) {
+  return (
+    <div className={css.usagePanel}>
+      <section className={css.usageGroup}>
+        <h4 className={css.usageHeading}>This request</h4>
+        <UsageRows usage={usage} />
+      </section>
+      <section className={css.usageGroup}>
+        <h4 className={css.usageHeading}>Session cumulative</h4>
+        <UsageRows usage={cumulative} />
+      </section>
+    </div>
+  )
+}
+
+function RequestOptions({
+  options,
+  preview = false,
+}: {
+  options: AssistantRequestConfig | undefined
+  preview?: boolean
+}) {
+  if (options === undefined) {
+    return <p className={css.noPayload}>Options not recorded</p>
+  }
+  return (
+    <JsonTree
+      data={options}
+      label="Request options JSON"
+      className={preview ? css.jsonPreview! : css.jsonPayload!}
+    />
+  )
+}
+
 function isMarkdownRecord(record: TableRecord): boolean {
   return record.cell.kind === 'user'
     || record.cell.kind === 'context'
@@ -435,7 +567,6 @@ function detailTabs(record: TableRecord): readonly DetailTabItem[] {
       { id: 'overview', label: 'Summary' },
       { id: 'rendered', label: 'Preview' },
       { id: 'source', label: 'Source' },
-      { id: 'timing', label: 'Timing' },
     ]
   }
   return [
@@ -1011,6 +1142,7 @@ function OverviewSection({
  */
 export function TrajectoryTable({
   prompt,
+  requestNumbers: sessionRequestNumbers,
   turns,
   collapsedTurns,
   onToggleTurn,
@@ -1026,6 +1158,7 @@ export function TrajectoryTable({
   const detailsResizeDrag = useRef<DetailsResizeDrag | null>(null)
   const tabHistory = useRef<Set<DetailTab>>(new Set(['overview']))
   const allRecords = flattenRecords(turns)
+  const requestNumbers = indexRequestNumbers(allRecords, sessionRequestNumbers)
   const turnRecords = collapseTurnRecords(allRecords, collapsedTurns)
   const records = collapseAssistantRecords(turnRecords, collapsedAssistants)
   const systemPromptPreview = prompt === undefined
@@ -1060,26 +1193,55 @@ export function TrajectoryTable({
   const selectedRequestSubtoolCalls = selectedRequestRecords.filter(
     record => record.cell.kind === 'subtool',
   ).length
-  const selectedRequestInputTotal = selectedRequestAssistant !== undefined
-    && (
-      selectedRequestAssistant.cell.input !== undefined
-      || selectedRequestAssistant.cell.cacheRead !== undefined
-      || selectedRequestAssistant.cell.cacheWrite !== undefined
-    )
-    ? (selectedRequestAssistant.cell.input ?? 0)
-      + (selectedRequestAssistant.cell.cacheRead ?? 0)
-      + (selectedRequestAssistant.cell.cacheWrite ?? 0)
-    : undefined
+  const selectedRequestInfo = selectedRequest === null
+    ? undefined
+    : sessionRequestNumbers?.find(request => request.number === selectedRequest.number)
+  const selectedRequestUsage = selectedRequestInfo?.usage ?? (
+    selectedRequestAssistant === undefined
+      ? undefined
+      : {
+          ...(selectedRequestAssistant.cell.input === undefined
+            ? {}
+            : { input: selectedRequestAssistant.cell.input }),
+          ...(selectedRequestAssistant.cell.cacheRead === undefined
+            ? {}
+            : { cacheRead: selectedRequestAssistant.cell.cacheRead }),
+          ...(selectedRequestAssistant.cell.cacheWrite === undefined
+            ? {}
+            : { cacheWrite: selectedRequestAssistant.cell.cacheWrite }),
+          ...(selectedRequestAssistant.cell.output === undefined
+            ? {}
+            : { output: selectedRequestAssistant.cell.output }),
+          ...(selectedRequestAssistant.cell.think === undefined
+            ? {}
+            : { reasoning: selectedRequestAssistant.cell.think }),
+        }
+  )
+  const selectedRequestCumulativeUsage =
+    selectedRequestInfo?.cumulativeUsage ?? selectedRequestUsage
+  const selectedRequestOptions = selectedRequestInfo?.requestConfig
   const activeTurn = selectedRequest?.turn ?? selected?.turn
   const selectedTabs = selectedRequest !== null
-    ? REQUEST_TABS
+    ? REQUEST_TABS.filter(tab => tab.id !== 'options' || selectedRequestOptions !== undefined)
     : promptSelected
       ? SYSTEM_PROMPT_TABS
       : selected === undefined ? [] : detailTabs(selected)
   const selectedParents: ParentRecords = selected === undefined
     ? {}
     : parentRecords(allRecords, selected)
-  const hasSelectedParents = selectedParents.message !== undefined
+  const selectedAssistantRequest = selected?.cell.kind === 'message'
+    ? requestNumbers.get(requestKey(selected.turn, selected.group))
+    : undefined
+  const selectedAssistantRequestTarget: SelectedRequest | undefined =
+    selected !== undefined && selectedAssistantRequest !== undefined
+      ? {
+          turn: selected.turn,
+          number: selectedAssistantRequest,
+          group: selected.group,
+        }
+      : undefined
+  const hasSelectedHierarchy = selectedAssistantRequestTarget !== undefined
+    || selectedParents.message !== undefined
     || selectedParents.tool !== undefined
   const splitStyle: TrajectorySplitStyle | undefined = toolRequestOffset === null
     ? undefined
@@ -1109,10 +1271,13 @@ export function TrajectoryTable({
     activateTab('system-prompt')
   }
 
-  const selectRequest = (request: SelectedRequest) => {
+  const selectRequest = (
+    request: SelectedRequest,
+    tab: 'overview' | 'timing' = 'overview',
+  ) => {
     setSelectedIndex(null)
     setSelectedRequest(request)
-    activateTab('overview')
+    activateTab(tab)
   }
 
   const openRecordSummary = (target: TableRecord) => {
@@ -1186,7 +1351,7 @@ export function TrajectoryTable({
               const request = record.groupStart
                 && !isCollapsedSummary
                 && !collapsedTurns.has(record.turn)
-                ? requestNumber(record.group)
+                ? requestNumbers.get(requestKey(record.turn, record.group))
                 : undefined
               return (
                 <tr
@@ -1516,48 +1681,24 @@ export function TrajectoryTable({
                     <dt>Status</dt>
                     <dd>{statusLabel(selectedRequestState)}</dd>
                   </div>
-                  <div>
-                    <dt>Started</dt>
-                    <StartedAtValue
-                      timestamp={selectedRequestAnchor?.cell.startedAt ?? null}
-                    />
-                  </div>
-                  <div>
-                    <dt>Duration</dt>
-                    <dd>
-                      {formatElapsedSeconds(
-                        selectedRequestAssistant?.cell.timeSeconds ?? null,
-                      )}
-                    </dd>
-                  </div>
-                  {selectedRequestInputTotal !== undefined && (
+                  {(selectedRequestInfo?.provider
+                    ?? selectedRequestInfo?.requestConfig?.provider) !== undefined && (
                     <div>
-                      <dt>Input</dt>
-                      <dd>{selectedRequestInputTotal} tok</dd>
+                      <dt>Provider</dt>
+                      <dd>
+                        {selectedRequestInfo?.provider
+                          ?? selectedRequestInfo?.requestConfig?.provider}
+                      </dd>
                     </div>
                   )}
-                  {selectedRequestAssistant?.cell.cacheRead !== undefined && (
-                    <div className={css.requestTokenDetail}>
-                      <dt>Cached</dt>
-                      <dd>{selectedRequestAssistant.cell.cacheRead} tok</dd>
-                    </div>
-                  )}
-                  {selectedRequestAssistant?.cell.cacheWrite !== undefined && (
-                    <div className={css.requestTokenDetail}>
-                      <dt>Cache created</dt>
-                      <dd>{selectedRequestAssistant.cell.cacheWrite} tok</dd>
-                    </div>
-                  )}
-                  {selectedRequestAssistant?.cell.input !== undefined && (
-                    <div className={css.requestTokenDetail}>
-                      <dt>Other</dt>
-                      <dd>{selectedRequestAssistant.cell.input} tok</dd>
-                    </div>
-                  )}
-                  {selectedRequestAssistant?.cell.output !== undefined && (
+                  {(selectedRequestInfo?.model
+                    ?? selectedRequestInfo?.requestConfig?.model) !== undefined && (
                     <div>
-                      <dt>Output</dt>
-                      <dd>{selectedRequestAssistant.cell.output} tok</dd>
+                      <dt>Model</dt>
+                      <dd>
+                        {selectedRequestInfo?.model
+                          ?? selectedRequestInfo?.requestConfig?.model}
+                      </dd>
                     </div>
                   )}
                   <div>
@@ -1570,23 +1711,36 @@ export function TrajectoryTable({
                       <dd>{selectedRequestSubtoolCalls}</dd>
                     </div>
                   )}
+                  {selectedRequestAssistant !== undefined && (
+                    <div>
+                      <dt>Result</dt>
+                      <dd className={css.overviewParentLinks}>
+                        <button
+                          type="button"
+                          className={css.overviewHierarchyNavLink}
+                          onClick={() => {
+                            openRecordSummary(selectedRequestAssistant)
+                          }}
+                        >
+                          <span>Assistant Message</span>
+                          <IconChevronRightOutline14
+                            className={css.overviewHierarchyJumpIconTight}
+                            size={11}
+                          />
+                        </button>
+                      </dd>
+                    </div>
+                  )}
                 </dl>
                 <div className={css.overviewSections}>
-                  {selectedRequestAssistant !== undefined && (
-                    <OverviewSection
-                      label="Result"
-                      onOpen={() => { openRecordSummary(selectedRequestAssistant) }}
-                    >
-                      <MarkdownRecordContent
-                        record={selectedRequestAssistant}
-                        rendered
-                        preview
-                        thinkingExpanded={thinkingExpanded}
-                        onThinkingExpandedChange={setThinkingExpanded}
-                        onOpenCall={openCallSummary}
-                      />
+                  {selectedRequestOptions !== undefined && (
+                    <OverviewSection label="Options" onOpen={() => { activateTab('options') }}>
+                      <RequestOptions options={selectedRequestOptions} preview />
                     </OverviewSection>
                   )}
+                  <OverviewSection label="Usage" onOpen={() => { activateTab('usage') }}>
+                    <UsageRows usage={selectedRequestUsage} />
+                  </OverviewSection>
                   <OverviewSection label="Timing" onOpen={() => { activateTab('timing') }}>
                     <RequestTiming
                       assistant={selectedRequestAssistant}
@@ -1596,6 +1750,15 @@ export function TrajectoryTable({
                 </div>
               </>
             )}
+            {selectedRequest !== null && activeTab === 'options' && (
+              <RequestOptions options={selectedRequestOptions} />
+            )}
+            {selectedRequest !== null && activeTab === 'usage' && (
+              <RequestUsagePanel
+                usage={selectedRequestUsage}
+                cumulative={selectedRequestCumulativeUsage}
+              />
+            )}
             {selectedRequest !== null && activeTab === 'timing' && (
               <RequestTiming
                 assistant={selectedRequestAssistant}
@@ -1621,17 +1784,32 @@ export function TrajectoryTable({
             {!promptSelected && selected !== undefined && selectedState !== undefined && activeTab === 'overview' && (
               <>
                 <dl className={css.overview}>
-                  {hasSelectedParents && (
+                  {hasSelectedHierarchy && (
                     <div>
                       <dt>Hierarchy</dt>
                       <dd className={css.overviewParentLinks}>
+                        {selectedAssistantRequestTarget !== undefined && (
+                          <button
+                            type="button"
+                            className={css.overviewHierarchyNavLink}
+                            onClick={() => {
+                              selectRequest(selectedAssistantRequestTarget)
+                            }}
+                          >
+                            <span>Request #{selectedAssistantRequestTarget.number}</span>
+                            <IconChevronRightOutline14
+                              className={css.overviewHierarchyJumpIconTight}
+                              size={11}
+                            />
+                          </button>
+                        )}
                         {selectedParents.message !== undefined && (
                           <button
                             type="button"
                             className={css.overviewHierarchyNavLink}
                             onClick={() => { openRecordSummary(selectedParents.message!) }}
                           >
-                            <span>Parent Message</span>
+                            <span>Assistant Message</span>
                             <IconChevronRightOutline14
                               className={css.overviewHierarchyJumpIconTight}
                               size={11}
@@ -1644,7 +1822,7 @@ export function TrajectoryTable({
                             className={css.overviewHierarchyNavLink}
                             onClick={() => { openRecordSummary(selectedParents.tool!) }}
                           >
-                            <span>Parent Tool Call</span>
+                            <span>Tool Call</span>
                             <IconChevronRightOutline14
                               className={css.overviewHierarchyJumpIconTight}
                               size={11}
@@ -1661,7 +1839,12 @@ export function TrajectoryTable({
                   {selected.cell.kind === 'message' && (
                     <div><dt>Tokens</dt><dd>{tokenSummary(selected.cell)}</dd></div>
                   )}
-                  <div><dt>Duration</dt><dd>{formatElapsedSeconds(selected.cell.timeSeconds)}</dd></div>
+                  {(selected.cell.kind === 'user' || selected.cell.kind === 'context') && (
+                    <div>
+                      <dt>Duration</dt>
+                      <dd>{formatElapsedSeconds(selected.cell.timeSeconds)}</dd>
+                    </div>
+                  )}
                 </dl>
                 <div className={css.overviewSections}>
                   {isMarkdownRecord(selected)
@@ -1696,9 +1879,21 @@ export function TrajectoryTable({
                           </OverviewSection>
                         </>
                       )}
-                  <OverviewSection label="Timing" onOpen={() => { activateTab('timing') }}>
-                    <RecordTiming record={selected} />
-                  </OverviewSection>
+                  {selectedAssistantRequestTarget !== undefined && (
+                    <OverviewSection
+                      label="Timing"
+                      onOpen={() => {
+                        selectRequest(selectedAssistantRequestTarget, 'timing')
+                      }}
+                    >
+                      <RecordTiming record={selected} />
+                    </OverviewSection>
+                  )}
+                  {(selected.cell.kind === 'tool' || selected.cell.kind === 'subtool') && (
+                    <OverviewSection label="Timing" onOpen={() => { activateTab('timing') }}>
+                      <RecordTiming record={selected} />
+                    </OverviewSection>
+                  )}
                 </div>
               </>
             )}

packages/client/ui-trajectory/src/client/TrajectoryView.tsx

@@ -2,15 +2,65 @@
 
 import { useMemo, useState } from 'react'
 import type { ConvViewProps } from '@deepseek-ai/dsh-client-ui-conversation/client'
-import type { ConversationContext } from '@deepseek-ai/dsh-client-runtime/client'
+import type {
+  AssistantMessageNode, ConversationContext,
+} from '@deepseek-ai/dsh-client-runtime/client'
 import { ContextsPanel, contextLabel } from './ContextsPanel.tsx'
-import { TrajectoryTable } from './TrajectoryTable.tsx'
+import {
+  TrajectoryTable,
+  type TrajectoryRequestNumber,
+  type TrajectoryUsage,
+} from './TrajectoryTable.tsx'
 import { TrajectoryToolbar } from './TrajectoryToolbar.tsx'
 import { deriveTrajectoryLayout } from './layout.ts'
 import css from './views.module.css'
 
 const EMPTY_IDS: ReadonlySet<number> = new Set()
 
+interface UsageLike {
+  inputTokens?: number
+  cacheReadTokens?: number
+  cacheWriteTokens?: number
+  outputTokens?: number
+  reasoningTokens?: number
+}
+
+function requestUsage(value: unknown): TrajectoryUsage | undefined {
+  const usage = value as UsageLike | undefined
+  if (usage === undefined) return undefined
+  return {
+    ...(usage.inputTokens === undefined ? {} : { input: usage.inputTokens }),
+    ...(usage.cacheReadTokens === undefined ? {} : { cacheRead: usage.cacheReadTokens }),
+    ...(usage.cacheWriteTokens === undefined ? {} : { cacheWrite: usage.cacheWriteTokens }),
+    ...(usage.outputTokens === undefined ? {} : { output: usage.outputTokens }),
+    ...(usage.reasoningTokens === undefined ? {} : { reasoning: usage.reasoningTokens }),
+  }
+}
+
+function addUsage(
+  total: TrajectoryUsage | undefined,
+  usage: TrajectoryUsage | undefined,
+): TrajectoryUsage | undefined {
+  if (usage === undefined) return total
+  return {
+    ...(total?.input === undefined && usage.input === undefined
+      ? {}
+      : { input: (total?.input ?? 0) + (usage.input ?? 0) }),
+    ...(total?.cacheRead === undefined && usage.cacheRead === undefined
+      ? {}
+      : { cacheRead: (total?.cacheRead ?? 0) + (usage.cacheRead ?? 0) }),
+    ...(total?.cacheWrite === undefined && usage.cacheWrite === undefined
+      ? {}
+      : { cacheWrite: (total?.cacheWrite ?? 0) + (usage.cacheWrite ?? 0) }),
+    ...(total?.output === undefined && usage.output === undefined
+      ? {}
+      : { output: (total?.output ?? 0) + (usage.output ?? 0) }),
+    ...(total?.reasoning === undefined && usage.reasoning === undefined
+      ? {}
+      : { reasoning: (total?.reasoning ?? 0) + (usage.reasoning ?? 0) }),
+  }
+}
+
 function currentContextOf(contexts: readonly ConversationContext[]): ConversationContext {
   const context = contexts.at(-1)
   if (context === undefined) throw new Error('trajectory context projection must not be empty')
@@ -43,6 +93,72 @@ export function TrajectoryView({ useSession }: ConvViewProps) {
     : contexts.find(context => context.id === selectedContextId) ?? currentContext
   const viewingCurrent = selectedContext.id === currentContext.id
   const selectedNodes = viewingCurrent ? nodes : selectedContext.nodes
+  const requestNumbers = useMemo<readonly TrajectoryRequestNumber[]>(() => {
+    const requestsBySeq = new Map<number, AssistantMessageNode>()
+    for (const context of contexts) {
+      for (const node of context.nodes) {
+        if (node.kind !== 'assistant' || node.step <= 0) continue
+        requestsBySeq.set(node.seq, node)
+      }
+    }
+    for (const node of nodes) {
+      if (node.kind !== 'assistant' || node.step <= 0) continue
+      requestsBySeq.set(node.seq, node)
+    }
+    const orderedRequests = [...requestsBySeq.values()]
+      .sort((left, right) => left.seq - right.seq)
+    const requestBySeq = new Map<number, TrajectoryRequestNumber>()
+    let cumulativeUsage: TrajectoryUsage | undefined
+    for (const [index, node] of orderedRequests.entries()) {
+      const usage = requestUsage(node.usage)
+      cumulativeUsage = addUsage(cumulativeUsage, usage)
+      requestBySeq.set(node.seq, {
+        turn: node.turn,
+        step: node.step,
+        number: index + 1,
+        ...(node.provenance?.provider === undefined
+          ? {}
+          : { provider: node.provenance.provider }),
+        ...(node.provenance?.model === undefined
+          ? {}
+          : { model: node.provenance.model }),
+        ...(node.requestConfig === undefined ? {} : { requestConfig: node.requestConfig }),
+        ...(usage === undefined ? {} : { usage }),
+        ...(cumulativeUsage === undefined ? {} : { cumulativeUsage }),
+      })
+    }
+
+    const selected: TrajectoryRequestNumber[] = []
+    const selectedKeys = new Set<string>()
+    for (const node of selectedNodes) {
+      if (node.kind !== 'assistant' || node.step <= 0) continue
+      const request = requestBySeq.get(node.seq)
+      if (request === undefined) continue
+      selected.push(request)
+      selectedKeys.add(`${node.turn}\u0000${node.step}`)
+    }
+    if (viewingCurrent && partial !== null && partial.step > 0) {
+      const key = `${partial.turn}\u0000${partial.step}`
+      if (!selectedKeys.has(key)) {
+        selected.push({
+          turn: partial.turn,
+          step: partial.step,
+          number: orderedRequests.length + 1,
+          ...(currentContext.prompt?.config?.provider === undefined
+            ? {}
+            : { provider: currentContext.prompt.config.provider }),
+          ...(currentContext.prompt?.config?.model === undefined
+            ? {}
+            : { model: currentContext.prompt.config.model }),
+          ...(currentContext.prompt?.config === undefined
+            ? {}
+            : { requestConfig: currentContext.prompt.config }),
+          ...(cumulativeUsage === undefined ? {} : { cumulativeUsage }),
+        })
+      }
+    }
+    return selected
+  }, [contexts, currentContext.prompt, nodes, partial, selectedNodes, viewingCurrent])
   const collapsedTurns = collapsedTurnsByContext.get(selectedContext.id) ?? EMPTY_IDS
   const collapsedAssistants = collapsedAssistantsByContext.get(selectedContext.id) ?? EMPTY_IDS
   const turns = useMemo(
@@ -164,6 +280,7 @@ export function TrajectoryView({ useSession }: ConvViewProps) {
           <TrajectoryTable
             key={selectedContext.id}
             {...selectedContext.prompt === undefined ? {} : { prompt: selectedContext.prompt }}
+            requestNumbers={requestNumbers}
             turns={turns}
             collapsedTurns={collapsedTurns}
             onToggleTurn={toggleTurn}

packages/client/ui-trajectory/src/client/WaterfallView.tsx

@@ -62,7 +62,7 @@ export function WaterfallView({ useSession, pxPerNode }: ConvViewProps & Waterfa
                   }}
                   title={lane.timing === 'measured'
                     /* durationMs is non-null exactly when timing is measured. */
-                    ? `${lane.name} · ${((lane.durationMs ?? 0) / 1000).toFixed(2)}s`
+                    ? `${lane.name} · ${((lane.durationMs ?? 0) / 1000).toFixed(2)} s`
                     : lane.timing === 'running' ? `${lane.name} · running` : `${lane.name} · duration unknown`}
                 />
               </div>

packages/client/ui-trajectory/src/client/layout.ts

@@ -53,6 +53,15 @@ interface LaidCell {
   callId?: string
 }
 
+interface LaidGroup {
+  title: string
+  laid: LaidCell[]
+}
+
+interface TurnBucket {
+  groups: LaidGroup[]
+}
+
 /**
  * Fold a snapshot into turn → Message/Step groups with expanded cells.
  * @param input - nodes plus in-flight partial/runningCalls.
@@ -70,7 +79,7 @@ export function deriveTrajectoryLayout(input: TrajectoryLayoutInput): readonly T
     const startedAt = finiteTime(call.time)
     if (startedAt !== null) callStartById.set(call.callId, startedAt)
   }
-  const turns = new Map<number, { message: LaidCell[]; steps: Map<number, LaidCell[]> }>()
+  const turns = new Map<number, TurnBucket>()
   let index = 0
   let prevAbsTime: number | null = null
   let lastAssistantTurn: number | null = null
@@ -78,20 +87,31 @@ export function deriveTrajectoryLayout(input: TrajectoryLayoutInput): readonly T
   const bucket = (turn: number) => {
     let entry = turns.get(turn)
     if (entry === undefined) {
-      entry = { message: [], steps: new Map() }
+      entry = { groups: [] }
       turns.set(turn, entry)
     }
     return entry
   }
 
   const pushMessage = (turn: number, laid: LaidCell) => {
-    bucket(turn).message.push(laid)
+    const groups = bucket(turn).groups
+    const last = groups.at(-1)
+    if (last?.title === 'Message') {
+      last.laid.push(laid)
+      return
+    }
+    groups.push({ title: 'Message', laid: [laid] })
   }
-  const pushStep = (turn: number, step: number, laid: LaidCell) => {
-    const steps = bucket(turn).steps
-    const list = steps.get(step) ?? []
-    list.push(laid)
-    steps.set(step, list)
+  const pushStep = (turn: number, step: number, laid: readonly LaidCell[]) => {
+    if (laid.length === 0) return
+    const groups = bucket(turn).groups
+    const title = `Step ${step}`
+    const existing = groups.find(group => group.title === title)
+    if (existing !== undefined) {
+      existing.laid.push(...laid)
+      return
+    }
+    groups.push({ title, laid: [...laid] })
   }
 
   for (let i = 0; i < nodes.length; i++) {
@@ -123,10 +143,8 @@ export function deriveTrajectoryLayout(input: TrajectoryLayoutInput): readonly T
         expandAssistant(node, index + 1, prevAbsTime, resultByCall, callStartById),
         codeDispatches,
       )
-      for (const laid of laidList) {
-        if (node.step > 0) pushStep(node.turn, node.step, laid)
-        else pushMessage(node.turn, laid)
-      }
+      if (node.step > 0) pushStep(node.turn, node.step, laidList)
+      else for (const laid of laidList) pushMessage(node.turn, laid)
       const last = laidList[laidList.length - 1]
       if (last !== undefined) index = last.cell.index
       prevAbsTime = finiteTime(node.time) ?? prevAbsTime
@@ -153,7 +171,7 @@ export function deriveTrajectoryLayout(input: TrajectoryLayoutInput): readonly T
     if (node.kind === 'tool-result') {
       if (!callEmittedInAssistant(nodes, node.callId)) {
         const toolName = node.call?.name
-        pushStep(0, 1, {
+        const laidList: LaidCell[] = [{
           absTime: finiteTime(node.callTime ?? node.time),
           ...(toolName !== undefined ? { toolName } : {}),
           callId: node.callId,
@@ -172,11 +190,12 @@ export function deriveTrajectoryLayout(input: TrajectoryLayoutInput): readonly T
             timeSeconds: durationSeconds(node.time, node.callTime),
             startedAt: finiteTime(node.callTime),
           },
-        })
+        }]
         for (const laid of expandSubCalls(codeDispatches.get(node.callId), index)) {
-          pushStep(0, 1, laid)
+          laidList.push(laid)
           index = laid.cell.index
         }
+        pushStep(0, 1, laidList)
       }
       prevAbsTime = finiteTime(node.time) ?? prevAbsTime
     }
@@ -195,10 +214,8 @@ export function deriveTrajectoryLayout(input: TrajectoryLayoutInput): readonly T
       callStartById,
       { streaming: true },
     )
-    for (const laid of laidList) {
-      if (partial.step > 0) pushStep(partial.turn, partial.step, laid)
-      else pushMessage(partial.turn, laid)
-    }
+    if (partial.step > 0) pushStep(partial.turn, partial.step, laidList)
+    else for (const laid of laidList) pushMessage(partial.turn, laid)
     const last = laidList[laidList.length - 1]
     if (last !== undefined) index = last.cell.index
   }
@@ -206,7 +223,7 @@ export function deriveTrajectoryLayout(input: TrajectoryLayoutInput): readonly T
   const seenCalls = collectCallIds(turns)
   for (const call of runningCalls) {
     if (seenCalls.has(call.callId)) continue
-    pushStep(call.turn, call.step > 0 ? call.step : 1, {
+    const laidList: LaidCell[] = [{
       absTime: null,
       toolName: call.name,
       callId: call.callId,
@@ -219,34 +236,27 @@ export function deriveTrajectoryLayout(input: TrajectoryLayoutInput): readonly T
         timeSeconds: null,
         startedAt: finiteTime(call.time),
       },
-    })
+    }]
     for (const laid of expandSubCalls(codeDispatches.get(call.callId), index)) {
-      pushStep(call.turn, call.step > 0 ? call.step : 1, laid)
+      laidList.push(laid)
       index = laid.cell.index
     }
+    pushStep(call.turn, call.step > 0 ? call.step : 1, laidList)
   }
 
   // Orphan turn-0 cells (orphaned tools / steering turn 0) fold into Turn 1.
   const prologue = turns.get(0)
   if (prologue !== undefined) {
     turns.delete(0)
-    const emptyTurn = (): { message: LaidCell[]; steps: Map<number, LaidCell[]> } => ({
-      message: [],
-      steps: new Map(),
-    })
+    const emptyTurn = (): TurnBucket => ({ groups: [] })
     const first = turns.get(1) ?? emptyTurn()
-    first.message = [...prologue.message, ...first.message]
-    for (const [step, cells] of prologue.steps) {
-      const existing = first.steps.get(step) ?? []
-      first.steps.set(step, [...cells, ...existing])
-    }
+    first.groups = [...prologue.groups, ...first.groups]
     turns.set(1, first)
   }
 
   for (const entry of turns.values()) {
-    for (const laid of entry.message) attachToolSchema(laid, callSchemas)
-    for (const laid of entry.steps.values()) {
-      for (const cell of laid) attachToolSchema(cell, callSchemas)
+    for (const group of entry.groups) {
+      for (const laid of group.laid) attachToolSchema(laid, callSchemas)
     }
   }
 
@@ -267,30 +277,20 @@ function attachToolSchema(
 
 function toTurnModel(
   turn: number,
-  entry: { message: LaidCell[]; steps: Map<number, LaidCell[]> },
+  entry: TurnBucket,
 ): TrajectoryTurnModel {
-  const groups: TrajectoryGroupModel[] = []
-  if (entry.message.length > 0) {
-    const description = groupDescription(entry.message)
-    groups.push({
-      title: 'Message',
-      ...(description !== undefined ? { description } : {}),
-      cells: entry.message.map(l => l.cell),
-    })
-  }
-  for (const step of [...entry.steps.keys()].sort((a, b) => a - b)) {
-    const laid = entry.steps.get(step) ?? []
+  const groups = entry.groups.map(({ title, laid }): TrajectoryGroupModel => {
     const description = groupDescription(laid)
-    groups.push({
-      title: `Step ${step}`,
+    return {
+      title,
       ...(description !== undefined ? { description } : {}),
       cells: laid.map(l => l.cell),
-    })
-  }
+    }
+  })
   return { turn, groups }
 }
 
-/** Wall-span duration + tool histogram, e.g. `1.5s bash×6`. */
+/** Wall-span duration + tool histogram, e.g. `1.5 s bash×6`. */
 function groupDescription(laid: readonly LaidCell[]): string | undefined {
   const parts: string[] = []
   // Tool rows contribute start (absTime) and end (start + own duration) so a
@@ -325,8 +325,8 @@ function groupDescription(laid: readonly LaidCell[]): string | undefined {
 function formatGroupDuration(seconds: number): string | undefined {
   if (!Number.isFinite(seconds)) return undefined
   const rounded = Math.round(seconds * 10) / 10
-  if (Number.isInteger(rounded)) return `${rounded}s`
-  return `${rounded.toFixed(1)}s`
+  if (Number.isInteger(rounded)) return `${rounded} s`
+  return `${rounded.toFixed(1)} s`
 }
 
 /** Own-duration seconds from two epoch-ms stamps; null when either is unusable. */
@@ -551,15 +551,12 @@ function callEmittedInAssistant(nodes: ConversationSnapshot['nodes'], callId: st
 }
 
 function collectCallIds(
-  turns: Map<number, { message: LaidCell[]; steps: Map<number, LaidCell[]> }>,
+  turns: Map<number, TurnBucket>,
 ): Set<string> {
   const ids = new Set<string>()
   for (const entry of turns.values()) {
-    for (const laid of entry.message) {
-      if (laid.callId !== undefined) ids.add(laid.callId)
-    }
-    for (const list of entry.steps.values()) {
-      for (const laid of list) {
+    for (const group of entry.groups) {
+      for (const laid of group.laid) {
         if (laid.callId !== undefined) ids.add(laid.callId)
       }
     }

packages/client/ui-trajectory/src/client/trajectory-record.ts

@@ -80,6 +80,6 @@ export interface TrajectoryCellProps extends HTMLAttributes<HTMLDivElement> {
 export function formatElapsedSeconds(seconds: number | null): string {
   if (seconds === null || !Number.isFinite(seconds)) return '—'
   const rounded = Math.round(seconds * 10) / 10
-  if (Number.isInteger(rounded)) return `${rounded}s`
-  return `${rounded.toFixed(1)}s`
+  if (Number.isInteger(rounded)) return `${rounded} s`
+  return `${rounded.toFixed(1)} s`
 }