Question: Do you know of a tool that can help new engineers quickly understand a codebase and accelerate their onboarding process?

For junior engineers trying to get up to speed on a codebase, Unblocked is a notable example of a rich, integrated tool. It draws information from GitHub, Slack, Confluence and other sources to offer authoritative answers to coding questions. It offers augmented source code, contextual documentation and a range of IDE plugins. With its security protections and open beta test, it can help junior engineers get up to speed faster by surfacing relevant documentation and previous discussions.

Another top contender is Codeium, an AI-powered coding assistant that works with more than 70 programming languages. It offers features like advanced code completion, AI-powered search and a chat interface to explain code and offer suggestions for fixing bugs. Codeium is designed for solo developers and teams, with a tiered pricing system to accommodate different budgets. Its data security is designed to keep user data private, so it can be a good choice for onboarding and development.

Refact is an open-source AI coding assistant that uses large language models like GPT-4 for fast code completion and code improvement. It can be run in self-hosted versions and offers customizable privacy settings, so it's adaptable for personal use. With pre-built prompts for refactoring and bug fixing, Refact can help developers work more efficiently while keeping their work private.

For a modular approach, you might want to check out kapa.ai, which lets developer-facing companies build LLM-powered support and onboarding bots. The system can be connected to a variety of technical sources to build a custom chatbot that answers technical questions and improves the developer experience. It's designed to reduce support requests and automate documentation tasks, so it can be a good way to improve overall developer productivity.