For developers
Understand any codebase before you touch it.
Read a repository's architecture, docs, code health and owners, and ask questions answered with the files they came from. Free on public repos. Pro brings your private repos, kept current on every push.
What you get
The parts of a codebase nobody wrote down.
Answers with sources
Chat answers from the index and points at the files and symbols it used. 10 answers a month on Free.
Docs from the code graph
A page for every module, built from the graph and kept in step with it. Reading costs no credits on any plan.
Code health with a fix-first list
A 1 to 10 score per file from 25 defect markers, checked against real bug fixes, with the riskiest code ranked first.
Named refactoring plans
Seven plan types, each with its blast radius. Extract Method is dataflow-checked, with the helper's parameters and return value.
Performance traced across files
N+1 queries, blocking calls in async code and I/O under a lock, followed through the call graph to the loop that runs them.
Dead code you can delete
Unreachable files, unused exports and zombie packages, tiered by confidence, with the ones safe to delete marked.
Ask
Ask a question, see the files behind the answer.
Chat answers from the index, so each answer points at the files and symbols it came from. Free accounts get 10 answers a month; on Pro, answers draw from $5 of monthly credits.
Documentation
Documentation and an architecture map, built from the code.
Every module gets a page generated from the code graph and kept in step with it. Reading it costs no credits on any plan.
Code health
See which files are likely to break, and who knows them.
Each file gets a 1 to 10 health score from 25 markers, checked against real bug fixes. Hotspots and owners come from git history, so you know whom to ask before you change something.
Pull requests
A review on every pull request, before anyone reads the diff.
The PR bot comments with what the change can break, files that usually change together but are missing, and the health change. Free on public repositories and on private ones with Pro, where AI review draws from your credits.
Pro
Bring the code you are paid to write.
Free covers public repositories. Pro adds your private ones through the GitHub App and keeps every index current on its own.
$15a month, or $12 a month billed yearly
- Private repositories through the GitHub App, read-only
- Auto-sync on every push, no manual re-index
- The PR bot on private repos, with AI review from credits
- $5 of AI credits every month for chat, docs and review
- Security scanning: CVEs with reachability, secrets across history
- Full commit history, up to 5 repositories
FREQUENTLY ASKED
Questions, answered
Do I need an account?
Not to read a repository that is already indexed. Indexing a new public repository, and asking more questions, takes a free sign-in.
Can I use it on private code?
Yes. Install the CLI and index locally for free, or use hosted Pro, which adds private repositories through the GitHub App and covers up to 5 repositories.
What do the Pro credits pay for?
Pro includes $5 of AI credits every month. Chat answers, written documentation, MCP answers and AI review on pull requests draw from that one balance, and top-ups never expire. Signals-only PR review, docs from the graph and search cost nothing.
Is the documentation written by a model?
The pages are built from the code graph, not by a model, so they cost nothing. Written explanations are added by a model on notable public repositories at our expense, and on any repository you hold on Pro.
Get started
Open a repository and look around.
Start free on public repos, and move to Pro when your private ones need it. Buying for a team? Book a call.