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Tools for understanding code and keeping docs current · Free

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CodeTrain

LiveWatched 20d

An AI coding training tool that uses a developer's own codebase as the material for exercises.

Free

What to know▼

How it works: AI plans a lesson, runs your code, and grades each step, but you type every line yourself while it checks your understanding.
What's different: Unlike tools that write code for you, CodeTrain makes sure you understand and can prove it, using your own codebase as material.
Pricing: Free in-browser tier; Pro adds repo mode with patch-back; Team adds a ramp dashboard and onboarding.
Best for: Developers and teams training engineers on a real codebase.

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PulseRepo

LiveWatched 11d

Turns a repo's git history into plain-language questions about ownership, stuck work and test coverage, for people managing the team, not the code.

Watch out · explicitly does not score individual people

FreeNo sign-up

What to know▼

How it works: reads commit/PR history rather than the code itself
Pricing: free, no signup
Watch out: explicitly does not score individual people

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RepoFold

LiveWatched 19d

Auto-generates a wiki from a GitHub repo where every claim links back to exact file and lines and stays current on every push, built for developers and their coding agents.

Free

What to know▼

How it works: Turns a GitHub repo into a wiki where every claim cites the exact file and lines, validated against the parsed source, and updates itself on every push. Coding agents can query it over MCP.
What's different: Claims are validated against parsed source code rather than generated freely, and it stays current automatically on each push.
Pricing: Free during beta.
Best for: Developers who want an always-current, cited reference for a codebase, including for use by their coding agents.

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