Question: I'm looking for a platform that allows me to ask questions about a code repository and get instant answers, do you know of any?

Unblocked is a strong contender. It combines information from sources like GitHub, Slack and Confluence into the codebase for immediate answers to developers. It offers augmented source code, correct answers and contextually relevant documentation that can dramatically accelerate your development. It also offers IDE plugins for Visual Studio Code and JetBrains IDEs and has strong security controls.

Another strong contender is /ask Swimm. The service uses static analysis to understand entire codebases, even parts that aren't well documented, and captures developer expertise to offer contextually relevant answers. It can help senior engineers spend more time on higher-level work and can improve over time to offer more accurate answers.

If you want a lightweight, AI-powered experience, check out Greptile. It lets you explore and generate code through a chat interface within a GitHub repository. Greptile is designed to protect your data, with SOC2 compliance and no storage of your code, so it's a good option if you want to quickly understand a new codebase.

Last, Devv AI offers an AI-powered search engine geared for programmers. It offers modes for chatting, web search and searching within GitHub repositories. The tool can automate tasks like documentation and refactoring, and can offer quick answers to common coding questions and help you work more efficiently.