# Flagship

Feature flags evaluated at the edge for Cloudflare Workers

> Links below point directly to Markdown versions of each page. Any page can also be retrieved as Markdown by sending an `Accept: text/markdown` header to the page's URL without the `index.md` suffix (for example, `curl -H "Accept: text/markdown" https://developers.cloudflare.com/flagship/`).
>
> For other Cloudflare products, see the [Cloudflare documentation directory](https://developers.cloudflare.com/llms.txt).
>
> Use [Flagship llms-full.txt](https://developers.cloudflare.com/flagship/llms-full.txt) for the complete Flagship documentation in a single file, intended for offline indexing, bulk vectorization, or large-context models.

## Overview

- [Cloudflare Flagship](https://developers.cloudflare.com/flagship/index.md): Ship features safely with Flagship, Cloudflare's feature flag service for controlling feature visibility without redeploying code.

## Get started

- [Get started](https://developers.cloudflare.com/flagship/get-started/index.md): Create your first Flagship feature flag and evaluate it inside a Cloudflare Worker using the binding API.

## Concepts

- [Concepts](https://developers.cloudflare.com/flagship/concepts/index.md): Understand Flagship core concepts including apps, flags, variations, targeting rules, evaluation context, and flag propagation.

## Configuration

- [Configuration](https://developers.cloudflare.com/flagship/configuration/index.md): Add and configure a Flagship binding in your Wrangler configuration file to evaluate feature flags in a Worker.

## Binding API

- [Binding API](https://developers.cloudflare.com/flagship/binding/index.md): Evaluate Flagship feature flags directly in Cloudflare Workers using the native binding with type-safe methods and automatic fallback.
- [Methods](https://developers.cloudflare.com/flagship/binding/methods/index.md): Reference for all Flagship binding evaluation methods, including typed value and details methods for booleans, strings, numbers, and objects.
- [Types](https://developers.cloudflare.com/flagship/binding/types/index.md): TypeScript type definitions for the Flagship binding, including Flagship, FlagshipEvaluationContext, and FlagshipEvaluationDetails.

## OpenFeature SDK

- [OpenFeature SDK](https://developers.cloudflare.com/flagship/sdk/index.md): Use the @cloudflare/flagship OpenFeature SDK to evaluate Flagship feature flags from Workers, Node.js, or the browser.
- [Client provider](https://developers.cloudflare.com/flagship/sdk/client-provider/index.md): Set up the FlagshipClientProvider to evaluate feature flags synchronously in browser applications using the OpenFeature web SDK.
- [Server provider](https://developers.cloudflare.com/flagship/sdk/server-provider/index.md): Set up the FlagshipServerProvider to evaluate feature flags from Workers, Node.js, or other server-side JavaScript runtimes using OpenFeature.

## Targeting rules

- [Targeting rules](https://developers.cloudflare.com/flagship/targeting/index.md): Serve different Flagship flag values to different users based on attributes, conditions, and logical grouping.
- [Operators](https://developers.cloudflare.com/flagship/targeting/operators/index.md): Reference for the 11 comparison operators available in Flagship targeting rule conditions, including equality, comparison, string, and array operators.
- [Percentage rollouts](https://developers.cloudflare.com/flagship/targeting/percentage-rollouts/index.md): Gradually release features to a fraction of users with Flagship percentage rollouts and consistent hashing for sticky bucketing.

## reference

- [Evaluation reasons and error codes](https://developers.cloudflare.com/flagship/reference/evaluation-reasons/index.md): Flagship evaluation reason values and error codes returned by binding details methods and the OpenFeature SDK.
- [Limits](https://developers.cloudflare.com/flagship/reference/limits/index.md): Platform limits for Flagship, including maximum apps per account, flags per app, condition nesting depth, and configuration size.