Fix some missing tool calls from thinking/subagent blocks#289738
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justschen
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Jan 22, 2026
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Pull request overview
This PR fixes a rendering issue where tool calls could be lost in thinking/subagent blocks when content was not yet expanded. The fix introduces an early initialization mechanism that ensures DOM elements are ready to receive content updates even before the user expands the collapsible section.
Changes:
- Added a
shouldInitEarly()hook toChatCollapsibleContentPartto allow subclasses to initialize content before expansion - Implemented early initialization in
ChatThinkingContentPartfor fixed scrolling mode - Implemented early initialization in
ChatSubagentContentPartwhen actively streaming - Added null safety checks for
textContainerinChatThinkingContentPartto handle cases where it may not be initialized
Reviewed changes
Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.
| File | Description |
|---|---|
| chatCollapsibleContentPart.ts | Added shouldInitEarly() hook that allows subclasses to trigger content initialization before expansion |
| chatThinkingContentPart.ts | Implemented shouldInitEarly() to return true for fixed scrolling mode and added null checks for textContainer access |
| chatSubagentContentPart.ts | Implemented shouldInitEarly() to return true when not initially complete (actively streaming) |
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