PPLX-95 - trckr

← PPLX-95

feature

Created: 2025-12-31 • Updated: 2026-01-01

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Create a new ThinkingSection molecule component that displays AI reasoning/thinking content in a collapsible format.

## Requirements
- Use existing ExpandableSection atom as the base
- Subtle/muted visual style (lighter text color, smaller font, minimal styling)
- Brain icon from Icon component
- Shows 'Thinking...' header with streaming indicator when expanded during streaming
- Shows 'View reasoning' or similar when collapsed
- Expanded by default during streaming, collapses when streaming completes

## Acceptance Criteria
- [ ] Component renders thinking content in a collapsible section
- [ ] Uses brain icon from existing Icon component
- [ ] Subtle styling matches design preference (lighter text, smaller font)
- [ ] Storybook stories: Default, Streaming, Collapsed, LongContent
- [ ] Unit tests for expand/collapse behavior
- [ ] Component exports from molecules index

## Technical Notes
- Location: src/src/components/molecules/ThinkingSection/
- Use ExpandableSection atom (src/src/components/atoms/ExpandableSection/)
- Follow existing molecule patterns in the codebase

Pull Requests (comma-separated URLs)

Attachments

Comments (3)

qa-agent · 2026-01-01

[QA] ✅ VERIFICATION PASSED - ThinkingSection component implementation verified and passes all acceptance criteria. All 24 unit tests passing, 7 Storybook stories working, component properly exported. 0 bugs found. Production-ready. Full report: /tmp/qa-PPLX-95.md

agent · 2026-01-01

## Implementation Complete Created the ThinkingSection molecule component at `src/src/components/molecules/ThinkingSection/` ### Files created - ThinkingSection.tsx - Main component - ThinkingSection.test.tsx - 24 unit tests (all passing) - ThinkingSection.stories.tsx - 7 Storybook stories - index.ts - Re-exports ### Features - Uses ExpandableSection atom with subtle variant - Brain icon from Icon component - Streaming indicator (Spinner) when isStreaming=true - Auto-expands during streaming, auto-collapses when complete - Controlled and uncontrolled modes supported - Subtle styling (tertiary text color, small font, left border) - Full keyboard accessibility ### Storybook stories Default, Streaming, Collapsed, LongContent, StreamingSimulation, Controlled, MultipleSections Merged to main: 7d7cb1e

triage-agent · 2025-12-31

## Feature Triage Complete **Status:** NOT IMPLEMENTED **Summary:** The ThinkingSection component does not exist in the codebase. This is a new feature request. The ExpandableSection atom provides excellent foundation - ThinkingSection will be a thin wrapper with brain icon, subtle styling, and streaming-aware behavior. **Implementation Location:** `src/src/components/molecules/ThinkingSection/` **Dependencies:** None - all required components exist (ExpandableSection atom, Icon with 'brain', design tokens) **Complexity:** Low - Simple wrapper component **Estimated Scope:** Small (4 files, ~200-300 lines) See attached triage report for full implementation details including props interface, styling approach, and test strategy.