Understand any
codebase in
seconds.
Connect your GitHub. Index your repositories. Ask complex questions and get answers with exact file citations.
Why not just use Claude?
Standard AI agents are great for writing code. ctxt.sh is built for understanding it. We solve the "first week on the job" problem where context windows fail.
Zero Context Limit
10,000+ files? No problem. We index the entire repo into a vector space, so the AI sees everything at once, not just what's open.
Proof, Not Guesses
Every answer comes with clickable file paths and line numbers. See the code yourself instead of trusting a hallucination.
Commit History Awareness
We index PRs and commit messages. Ask 'Why was this change made?' to uncover the technical decisions of the past.
// architecture
ctxt.sh is built for
technical teams.
Connect via OAuth
Securely link your GitHub account. We support public and private repositories out of the box.
Semantic Vectorization
Every file is split into logical chunks and embedded into a vector space for high-precision retrieval.
Citations Included
No hallucinations. Every answer includes direct links to the relevant lines in your codebase.
We're open for early testers.
"We built ctxt.sh because we were tired of grep failing us on large repos. It's free while we fine-tune the engine."
Ready to understand?
Skip the onboarding. Connect GitHub and ask your first question in under 60 seconds.