## Feature 002: Customize session and break lengths

**Sources:** customize-session-and-break-lengths
**Personas:** knowledge worker trying to protect deep work time, student managing study sessions
**Stack span:** full-stack
**Tier:** v1

**Description:**

Adjust the duration of focus and break periods to match personal rhythm. Without this, a rigid default frustrates users whose work doesn't fit 25/5.

**Constituent tickets:**
- customize-session-and-break-lengths
