# Extensions inside existing applications

[All project types](../README.md) · [Shared launch](../shared/launch.md)

Add useful behavior to familiar software while keeping the person's existing documents and working habits.

## Projects to build

- [Move information between two Excel files](excel-workbook-transfer.md)
- [Prepare an incoming spreadsheet](spreadsheet-import.md)
- [See meaningful changes between spreadsheets](spreadsheet-changes.md)
- [Assemble a recurring Word document](word-report-assembly.md)
- [Prepare artwork for several destinations](artwork-export.md)
- [Make printable cards from existing material](printable-cards.md)

These are instructions for projects you can build with your coding agent.