Session 1 - Initializer Agent - 2026-04-06

## Completed
- Read and analyzed GitHub issue #526
- Researched the full source creation and listing flow (frontend + backend)
- Identified root cause: useCreateSource and useFileUpload don't invalidate QUERY_KEYS.sourcesInfinite
- Created claude-goal.md with detailed analysis
- Created feature_list.json with 8 test cases
- Created dev-init.sh
- Created branch: fix/source-list-auto-refresh-526
- Made initial commit

## Root Cause Summary
- useNotebookSources queries with key ['sources', 'infinite', notebookId]
- useCreateSource invalidates ['sources', notebookId] - doesn't match infinite key
- useFileUpload invalidates ['sources', notebookId] - doesn't match infinite key
- React Query prefix matching: ['sources', notebookId] does NOT match ['sources', 'infinite', notebookId]

## Fix Required
File: frontend/src/lib/hooks/use-sources.ts

1. In useCreateSource onSuccess (~line 96-129):
   - After each QUERY_KEYS.sources(notebookId) invalidation, add QUERY_KEYS.sourcesInfinite(notebookId) invalidation

2. In useFileUpload onSuccess (~line 203-210):
   - After QUERY_KEYS.sources(variables.notebookId) invalidation, add QUERY_KEYS.sourcesInfinite(variables.notebookId) invalidation

## Branch
fix/source-list-auto-refresh-526

## Next Steps for Coding Agent
1. Apply the fix to use-sources.ts (add sourcesInfinite invalidation)
2. Run frontend linting/type checks
3. Test manually or write unit tests
4. Mark feature_list.json tests as passing
5. Create PR