## Documentation Index

Fetch the complete documentation index at: [/llms.txt](https://cosmo-docs.wundergraph.com/llms.txt)

Use this file to discover all available pages before exploring further.

Federated graphs are composed of “base subgraphs”. Feature subgraphs represent a replacement (or “override”) for a specific base subgraph. A feature subgraph exists only as long as its base subgraph also exists. Creating a feature subgraph does nothing in isolation. It must be added to an enabled [feature flag](https://cosmo-docs.wundergraph.com/concepts/feature-flags) to be considered by composition.

## Minimum Requirements

| Package | Minimum version |
| --- | --- |
| [wgc](https://cosmo-docs.wundergraph.com/cli/intro) | [0.58.0](https://github.com/wundergraph/cosmo/compare/wgc@0.57.7...wgc@0.58.0) |
| [router](https://cosmo-docs.wundergraph.com/router/intro) | [0.95.0](https://github.com/wundergraph/cosmo/releases/tag/router%400.95.0) |

## Create Feature Subgraph

## Publish Feature Subgraph

## Update Feature Subgraph

## Delete Feature Subgraph

[Delete, List, Fetch And More](https://cosmo-docs.wundergraph.com/cli/schema-contracts/delete-list-fetch-and-more) [Create Feature Subgraph](https://cosmo-docs.wundergraph.com/cli/feature-subgraph/create-feature-subgraph)