Ruby client information

content/en/language_clients/language_client_overview.md

@@ -15,5 +15,5 @@ Language client summaries are available in the main Sigstore documentation, but
 | Java (available soon)                    | [sigstore-java](https://github.com/sigstore/sigstore-java)     |
 | [Javascript](../javascript)              | [sigstore-js](https://github.com/sigstore/sigstore-js)         |
 | [Python](../python)                      | [sigstore-python](https://github.com/sigstore/sigstore-python) |
-| Ruby (available soon)                    | [sigstore-ruby](https://github.com/sigstore/sigstore-ruby)     |
+| [Ruby](../ruby)                          | [sigstore-ruby](https://github.com/sigstore/sigstore-ruby)     |
 | [Rust](../rust)                          | [sigstore-rs](https://github.com/sigstore/sigstore-rs)         |

content/en/language_clients/ruby.md

@@ -0,0 +1,44 @@
+---
+type: docs
+category: Language Clients
+title: Ruby
+weight: 45
+---
+[`sigstore`](https://rubygems.org/gems/sigstore) is a pure-ruby implementation of Sigstore signature verification.
+
+The project repository can be found [here](https://github.com/sigstore/sigstore-ruby#sigstore).
+
+## Features
+
+- Pure Ruby implementation of `sigstore sign` and `sigstore verify` command from the [Cosign](../../cosign/verifying/verify) project
+- `gem` subcommand
+- TUF client implementation
+
+## Installation
+
+`sigstore` requires Ruby version 3.1.0 or greater.
+
+**This gem is under active development, and will not be considered stable until the 1.0 release.**
+
+Release information is available [here](https://github.com/sigstore/sigstore-ruby/releases).
+
+Add sigstore to your Gemfile:
+
+```console
+gem 'sigstore', '~> 0.1.1'
+```
+
+Install sigstore:
+
+```console
+gem install sigstore
+```
+
+## Example
+
+```console
+gem sigstore_cosign_verify_bundle --bundle a.txt.sigstore \
+    --certificate-identity https://github.com/sigstore-conformance/extremely-dangerous-public-oidc-beacon/.github/workflows/extremely-dangerous-oidc-beacon.yml@refs/heads/main \
+    --certificate-oidc-issuer https://token.actions.githubusercontent.com \
+    a.txt
+```