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## Quick Start

Build outcomes, not just features. Create testable hypotheses as vertical slices, measure real impact, and learn fast. Every story should deliver measurable value and be demonstrable end-to-end.

### Before Building

- [ ] **Vertical Slice**: End-to-end value through all layers (UI → API → Data)
- [ ] **Hypothesis**: "We believe [doing this] will result in [this outcome] because [reason]"
- [ ] **Success Metrics**: [Define how we'll measure success](./attachments/success-metrics.md?template=stock_partials_success_metrics)
- [ ] **Validate Assumptions**: Quick check with stakeholders/users/data
- [ ] **Demo Plan**: [How we'll show this works](./attachments/demo.md?template=stock_partials_demo)

### During Build

- [ ] **Design**: [Technical approach](./attachments/design.md?template=stock_partials_design)
- [ ] **Tasks**: [Task breakdown](./attachments/tasks.md?template=stock_partials_tasks)
- [ ] **Implement**: TDD → Build → Refactor → Integrate

### After Deploy

- [ ] **Definition of Done**: [Complete checklist](./attachments/dod.md?template=stock_partials_dod)
- [ ] **Measure Results**: Check your success metrics
- [ ] **Retrospect**: What did we learn? Do we iterate, pivot, or close?

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**Keep it small**: If this takes >3 days, slice smaller.
**Stay focused**: Build toward outcomes, not just outputs.
**Iterate fast**: Deploy → Measure → Learn → Adjust.

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