Productivity tools

The core engineering challenge in productivity tools is relational data integrity — tasks have owners, dependencies, deadlines, and states that all interact. Layer on RBAC or PBAC, timezone-accurate date arithmetic, and real-time conflict resolution for concurrent edits, and the data model becomes the primary determinant of product quality.

Getting these foundations right — the permission model, the event architecture, the sync strategy — is what determines whether the product handles real organisational complexity or only the scenarios it was demoed with.