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fix(chat): render subagent content as collapsible thinking blocks #3602

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fix(chat): render subagent content as collapsible thinking blocks #3602

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91e1edd
fix(home-chat): render subagent content as collapsible thinking blocks
waleedlatif1 Mar 15, 2026
756e86d
fix(home-chat): copy duration to existing agent group instead of skip…
waleedlatif1 Mar 15, 2026
919265e
fix(home-chat): extract shimmer to CSS module, move streamingContentR…
waleedlatif1 Mar 15, 2026
1805b36
fix(home-chat): only shimmer last text item in agent group
waleedlatif1 Mar 15, 2026
5eb93dd
fix(home-chat): deduplicate flush blocks copy, persist subagent durat…
waleedlatif1 Mar 15, 2026
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fix(home-chat): deduplicate flush blocks copy, persist subagent durat… 
…ion on mid-stream stop
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@waleedlatif1
waleedlatif1 committed Mar 15, 2026
commit 5eb93ddb816da62d7255cb5a98ecff2010709d32
17 changes: 14 additions & 3 deletions apps/sim/app/workspace/[workspaceId]/home/hooks/use-chat.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -285,6 +285,7 @@ export function useChat(
const streamGenRef = useRef(0)
const streamingContentRef = useRef('')
const streamingBlocksRef = useRef<ContentBlock[]>([])
const subagentStartTimeRef = useRef<number | undefined>(undefined)
const executionStream = useExecutionStream()
const isHomePage = pathname.endsWith('/home')

Expand Down Expand Up @@ -503,8 +504,9 @@ export function useChat(
}

const flush = () => {
streamingBlocksRef.current = [...blocks]
const snapshot = { content: runningText, contentBlocks: [...blocks] }
const blocksCopy = [...blocks]
streamingBlocksRef.current = blocksCopy
const snapshot = { content: runningText, contentBlocks: blocksCopy }
setMessages((prev) => {
const idx = prev.findIndex((m) => m.id === assistantId)
if (idx >= 0) {
Expand Down Expand Up @@ -771,6 +773,7 @@ export function useChat(
if (name) {
activeSubagent = name
subagentStartTime = Date.now()
subagentStartTimeRef.current = subagentStartTime
blocks.push({ type: 'subagent', content: name })
flush()
}
Expand All @@ -789,6 +792,7 @@ export function useChat(
}
activeSubagent = undefined
subagentStartTime = undefined
subagentStartTimeRef.current = undefined
flush()
break
}
Expand Down Expand Up @@ -819,6 +823,10 @@ export function useChat(

const content = streamingContentRef.current

// If a subagent was in progress when stopped, compute its elapsed duration
const inProgressDuration =
subagentStartTimeRef.current != null ? Date.now() - subagentStartTimeRef.current : undefined

const storedBlocks: TaskStoredContentBlock[] = streamingBlocksRef.current.map((block) => {
if (block.type === 'tool_call' && block.toolCall) {
const isCancelled =
Expand All @@ -841,7 +849,10 @@ export function useChat(
return {
type: block.type,
content: block.content,
...(block.type === 'subagent' && block.duration != null && { duration: block.duration }),
...(block.type === 'subagent' &&
(block.duration ?? inProgressDuration) != null && {
duration: block.duration ?? inProgressDuration,
}),
}
})

Expand Down
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