## Story 005: Adjust session and break lengths

**Persona:** Sam, 42, a writer who tried traditional 25/5 pomodoros but found they did not map to her natural work rhythm. She prefers 50-minute sessions and 10-minute breaks. She wants the app to support her rhythm without judgment.

**Situation:**

Sam opens settings. She wants to change the default session length from 25 minutes to 50 minutes, and the break length from 5 minutes to 10 minutes.

**Need:**

As Sam, I want to adjust the session and break lengths once, have those become my new defaults, and never think about settings again, so that the app fits my rhythm instead of forcing me into someone else's.

**Acceptance:**
- Settings are accessible from the main screen (one tap, not buried)
- I can set session length and break length independently (numbers in minutes, or a slider)
- My custom settings persist and become the default for all future sessions
- Changing a setting takes effect immediately on the next session (no app restart required)

**Tier:** core

**Confusion-flags:**
- Should there be preset options (25/5, 50/10, 90/15) or should every setting be a freeform number? Presets are faster; freeform is more flexible. We have not decided.
- Is there a 'reset to default' button, or does changing the value just change it? If a user experiments with settings, they might want a way back to 'normal.'
- Should users be able to set different defaults per day or per task type? That feels like enrichment, not core — but the decision should be conscious.
