Quickstart
Get C0 installed, connected to your codebase, and running your first workflow in under five minutes.
1. Install C0
Open the Extensions view (Cmd+Shift+X on Mac, Ctrl+Shift+X on Windows/Linux) and search for C0.
2. Sign in
On first launch, C0 will prompt you to sign in. Click Sign in with C0 and complete authentication in your browser. Once signed in, you'll be returned to your IDE automatically.
3. Open a project and let C0 index it
Open any project folder in your IDE. C0 will detect it and begin indexing your codebase automatically.
You'll see a status indicator in the C0 panel:
Indexing: C0 is reading your files and building its knowledge base
Ready: indexing is complete; C0 now understands your codebase
For small projects, indexing takes under a minute. For larger codebases, it may take a few minutes on the first run. After that, C0 only re-indexes files that have changed, so subsequent updates are nearly instant.
Note: You can start using C0 before indexing finishes. Results will improve as indexing progresses.
4. Try your first workflow
Once indexing completes, try one of these to see C0 in action:
Ask a question about your code:
Open the C0 chat panel and type:
C0 will read the relevant files, trace the flow, and give you a clear explanation grounded in your actual codebase not a generic answer.
Debug an error:
Switch to Debug mode in the C0 panel, paste an error message or stack trace, and hit enter:
C0 will locate the source of the problem, explain why it's happening, and offer a fix.
Generate tests for a file:
Switch to Generate tests mode, select a file or function, and run it. C0 will produce a full test suite matched to your project's existing test framework and conventions.
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