C0
C0 is an AI-powered coding assistant built into your IDE. It indexes your entire codebase, remembers what it learns, and helps you write, debug, review, document, and understand code all through natural conversation, without ever leaving your editor.
What makes C0 different
Most AI coding tools work in isolation. They don't know your project, your patterns, or your team's conventions. Every session starts from scratch.
C0 is built around a persistent knowledge base that continuously indexes your codebase. It understands your functions, your dependencies, your architectural patterns, and how everything connects. That understanding carries across sessions, so C0 gets more useful the longer you use it not less.
On top of that foundation, C0 offers a set of purpose-built workflows not a generic chat box, but specific modes designed around the things developers actually do all day: debugging, writing tests, reviewing code, documenting code and working from Jira tickets.
Core workflows
Chat with code
Ask questions about your codebase in plain language
Debug mode
Trace errors to their root cause and fix them
Optimize mode
Improve performance, readability, and structure
Generate test cases
Write meaningful tests for any function or module
Code reviews
Catch bugs and issues before code is merged
Deep Wiki
Generate rich documentation with usage notes and edge cases
Code Map
Visualize code structure and system flow with Mermaid diagrams
Swagger Agent
Agent works with Swagger documentation and API Specifications
Integrations
Jira
Work directly from tickets without context-switching
Knowledge base
The persistent memory layer that powers everything
Get Started with C0
New to C0? Install the extension, connect your codebase, and run your first workflow in under five minutes.
Choose your environment
VS Code / Cursor / Antigravity
Install the C0 extension directly from the marketplace.
CodeMate Toolbox
Already have Toolbox installed? You can install the C0 extension directly from within it no marketplace required.
Open CodeMate Toolbox.
Navigate to C0 → Install Extension.
Toolbox will detect your installed editors and install the extension automatically.
Don't have Toolbox yet? Download it here.
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