# OpenFeature

> OpenFeature is a vendor-neutral, community-driven specification for feature flagging.
> This index points coding agents and language models to the project's primary documentation and ecosystem resources.

## Start here

- [OpenFeature documentation](https://openfeature.dev/docs/reference/intro): Learn the core concepts and how OpenFeature fits into a feature flagging system.
- [Five minutes to feature flags](https://openfeature.dev/docs/tutorials/five-minutes-to-feature-flags): Follow a short, practical introduction to evaluating feature flags with OpenFeature.
- [OpenFeature specification](https://openfeature.dev/specification): Read the normative API, evaluation context, provider, hook, and event definitions.

## Concepts

- [Evaluation API](https://openfeature.dev/docs/reference/concepts/evaluation-api): Learn how to evaluate feature flags and retrieve evaluation details.
- [Providers](https://openfeature.dev/docs/reference/concepts/provider): Understand how providers connect the OpenFeature API to a feature flag management system.
- [Evaluation context](https://openfeature.dev/docs/reference/concepts/evaluation-context): Supply contextual data for targeting and dynamic flag evaluation.
- [Hooks](https://openfeature.dev/docs/reference/concepts/hooks): Learn how hooks add behavior before, during, and after flag evaluation.
- [Events](https://openfeature.dev/docs/reference/concepts/events): React to provider readiness, errors, and flag configuration changes.
- [SDK paradigms](https://openfeature.dev/docs/reference/concepts/sdk-paradigms): Compare the design patterns shared across OpenFeature SDKs.
- [Tracking](https://openfeature.dev/docs/reference/concepts/tracking): Associate user actions and metrics with flag evaluation contexts for experimentation.

## Getting started by language

- [.NET and ASP.NET Core](https://openfeature.dev/docs/tutorials/getting-started/dotnet): Integrate the .NET SDK into an ASP.NET Core application.
- [Go and Gin](https://openfeature.dev/docs/tutorials/getting-started/go): Integrate the Go SDK into a Gin application.
- [JavaScript and Express](https://openfeature.dev/docs/tutorials/getting-started/node): Integrate the JavaScript SDK into an Express application using JavaScript or TypeScript.
- [Java and Spring Boot](https://openfeature.dev/docs/tutorials/getting-started/java/spring-boot): Integrate the Java SDK into a Spring Boot application.
- [Java and Dropwizard](https://openfeature.dev/docs/tutorials/getting-started/java/dropwizard): Integrate the Java SDK into a Dropwizard application.
- [PHP and Laravel](https://openfeature.dev/docs/tutorials/getting-started/php): Integrate the PHP SDK into a Laravel application.
- [Python and Flask](https://openfeature.dev/docs/tutorials/getting-started/python): Integrate the Python SDK into a Flask application.
- [Rust and Axum](https://openfeature.dev/docs/tutorials/getting-started/rust): Integrate the Rust SDK into an Axum application.

## SDKs and integrations

- [SDK technologies](https://openfeature.dev/docs/reference/sdks): Find server-side, client-side, and web SDK documentation.
- [SDK compatibility](https://openfeature.dev/docs/reference/sdks/sdk-compatibility): Compare SDK support for OpenFeature specification features.
- [Ecosystem](https://openfeature.dev/ecosystem): Search available SDKs, providers, hooks, and integrations.
- [flagd](https://flagd.dev/): Configure an open-source, OpenFeature-compliant feature flag evaluation engine and its providers.
- [OpenFeature CLI](https://openfeature.dev/docs/reference/other-technologies/cli): Generate typed flag accessors and work with OpenFeature tooling.
- [OpenFeature MCP Server](https://openfeature.dev/docs/reference/other-technologies/mcp): Connect AI assistants to OpenFeature documentation and resources through MCP.

## Protocols and project resources

- [OpenFeature Remote Evaluation Protocol](https://openfeature.dev/docs/reference/other-technologies/ofrep): Learn the vendor-neutral protocol for remote flag evaluation.
- [OFREP OpenAPI specification](https://openfeature.dev/docs/reference/other-technologies/ofrep/openapi): Inspect the HTTP API contract for OFREP implementations.
- [OpenFeature community](https://openfeature.dev/community): Find governance, contribution, and community meeting information.
- [OpenFeature on GitHub](https://github.com/open-feature): Browse the specification, SDKs, integrations, and project repositories.