Add "OpenAPI integration with DocC" GSoC project idea

Author: sofiaromorales

gsoc2025/index.md

@@ -303,6 +303,38 @@ Enhance Swift Testing's reporting of test results to the console/terminal. Consi
 
 - [Stuart Montgomery](https://github.com/stmontgomery)
 
+### OpenAPI integration with DocC
+
+**Project size**: 350 hours (large)
+
+**Estimated difficulty**: Intermediate
+
+**Recommended skills**
+
+- Basic proficiency in Swift.
+- Basic knowledge in HTTP APIs.
+
+**Description**
+
+[OpenAPI](https://www.openapis.org/) is a standard for documenting HTTP services. It allows creating documents in YAML or JSON format that can be utilized by various tools to automate workflows, such as generating the required code for sending and receiving HTTP requests. The Swift ecosystem already has tools that work with OpenAPI, such as the [Swift OpenAPI Generator](https://github.com/apple/swift-openapi-generator). 
+
+As part of the Google Summer of Code project, the student will develop a tool that integrates OpenAPI with [DocC](https://github.com/swiftlang/swift-docc), expanding the support of the the documentation tool for other languages and enhancing the Swift tooling ecosystem.
+
+**Expected outcomes/benefits/deliverables**
+
+This project delivers a library that processes OpenAPI document files (JSON/YAML) to generate DocC documentation using Swift-DocC. It's designed for easy integration into other Swift tools.
+
+Extended goals:
+
+* Incorporate the tool into Swift OpenAPI Generator.
+* Enable OAS-DocC Live Preview support for editors like VS Code.
+
+**Potential mentors**
+
+- [Sofía Rodríguez](https://github.com/sofiaromorales)
+- [Si Beaumont](https://github.com/simonjbeaumont)
+- [Honza Dvorsky](https://github.com/czechboy0)
+
 ### Example project name
 
 **Project size**: N hours