# Platform Overview

- [What Amigo Does](https://docs.amigo.ai/platform-overview/what-amigo-does.md): A concrete scenario showing what Amigo does - from patient contact to verified EHR writeback - and why the data foundation matters.
- [How It Works](https://docs.amigo.ai/platform-overview/how-it-works.md): Walk through a complete interaction lifecycle from patient contact to post-call analysis, mapping each step to real system components.
- [Design Principles](https://docs.amigo.ai/platform-overview/design-principles.md): Four engineering principles that guide every architecture decision - measurement-first, composable, risk-calibrated, and goal-oriented.
- [Deployment Model](https://docs.amigo.ai/platform-overview/deployment-model.md): Phased rollout from baseline parity to proven improvement, plus version sets, multi-org tenancy, and channel tagging.
- [Data Residency](https://docs.amigo.ai/platform-overview/data-residency.md): Multi-region deployment options and data sovereignty controls for healthcare compliance.
- [Cost and Latency Optimization](https://docs.amigo.ai/platform-overview/cost-and-latency.md): How prompt caching, model routing, and pipeline design keep costs low and responses fast.


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