Add toolkit overview presentation and executive summary (#9)

* Add toolkit overview presentation and executive summary

- Add non-technical presentation explaining the toolkit's capabilities
- Simplify language throughout for non-technical audiences
- Add executive summary one-pager for stakeholders
- Generate HTML slides using Marp for easy viewing
- Add docs:slides npm script to regenerate slides
- Update README with links to overview materials

* Update presentation link and minor content changes

* Simplify README links to presentation

Author: mryhmln

README.md

@@ -2,6 +2,8 @@
 
 This toolkit helps teams build consistent, well-documented APIs for safety net programs—enabling faster integration between benefits systems and reducing the technical barriers to improving service delivery.
 
+**New here?** Start with the [Executive Summary](./docs/presentation/executive-summary.md) for a one-page overview, or read the [Toolkit Overview](./docs/presentation/safety-net-openapi-overview.md) for a detailed walkthrough.
+
 ## About This Repository
 
 This is an evolving repository where Code for America stores integrated benefits API specifications for the different states we work with. The specifications are built on a common data model that captures the core concepts shared across safety net programs—applications, households, income, eligibility—while allowing for state-specific variations in terminology, program names, and data requirements.

docs/presentation/executive-summary.md

@@ -0,0 +1,42 @@
+# Safety Net OpenAPI Toolkit
+## Executive Summary
+
+### The Problem
+
+Building technology for safety net programs is challenging. Each state has different terminology, program names, and requirements. Development teams waste time reinventing solutions, integration between systems is slow and error-prone, and organizations often become locked into specific vendors' proprietary systems.
+
+### The Solution
+
+The Safety Net OpenAPI Toolkit provides **pre-built, shared API definitions for benefits eligibility programs**. Instead of starting from scratch, teams build on a common foundation that captures core concepts—applications, households, income, eligibility—while allowing for state-specific customization.
+
+### Key Capabilities
+
+- **Shared API Definitions** — Ready-to-use specifications for common benefits data, built on industry standards that any vendor can implement
+- **Simulated APIs** — Fully functional test environments generated automatically, enabling frontend development without waiting for backend systems
+- **Ready-to-Use Code Libraries** — Pre-built integration code that catches errors early and speeds up development
+- **State Customizations** — Adapt the shared definitions for each state's terminology and requirements without duplicating work
+- **One-Command API Creation** — Define a new data type once, and automatically get a complete API with documentation, test environment, and code libraries
+
+### Benefits
+
+| For | Value |
+|-----|-------|
+| **Development Teams** | Start building immediately; consistent patterns reduce bugs and ramp-up time |
+| **Program Managers** | Faster delivery; reduced coordination overhead between teams |
+| **States & Agencies** | Customizable for local requirements; no vendor lock-in since any provider can implement the shared definitions |
+
+### How It Works
+
+1. Teams start with pre-built API definitions for common benefits data
+2. State-specific customizations adapt terminology and requirements
+3. Documentation, test environments, and code libraries are generated automatically
+4. Backend teams implement against clear specifications with automated verification
+5. Improvements to the shared foundation benefit all participating states
+
+### Get Started
+
+Visit the [Toolkit Overview presentation](https://codeforamerica.github.io/safety-net-openapi/presentation/safety-net-openapi-overview.html) for a detailed walkthrough, or explore the [repository on GitHub](https://github.com/codeforamerica/safety-net-openapi).
+
+---
+
+*Code for America — Enabling faster, more consistent API development for safety net programs.*