GitNexus

Graph-powered code intelligence for AI agents. Index any codebase into a knowledge graph, then query it via MCP or CLI.

Works with Cursor, Claude Code, Codex, Windsurf, Cline, OpenCode, and any MCP-compatible tool.

Why?

AI coding tools don't understand your codebase structure. They edit a function without knowing 47 other functions depend on it. GitNexus fixes this by precomputing every dependency, call chain, and relationship into a queryable graph.

Three commands to give your AI agent full codebase awareness.

Quick Start

# Index your repo (run from repo root)
npx gitnexus analyze

That's it. This indexes the codebase, installs agent skills, registers Claude Code hooks, and creates AGENTS.md / CLAUDE.md context files — all in one command.

To configure MCP for your editor, run npx gitnexus setup once — or set it up manually below.

gitnexus setup auto-detects your editors and writes the correct global MCP config. You only need to run it once.

Editor Support

Editor	MCP	Skills	Hooks (auto-augment)	Support
Claude Code	Yes	Yes	Yes (PreToolUse)	Full
Cursor	Yes	Yes	—	MCP + Skills
Codex	Yes	Yes	—	MCP + Skills
Windsurf	Yes	—	—	MCP
OpenCode	Yes	Yes	—	MCP + Skills

Claude Code gets the deepest integration: MCP tools + agent skills + PreToolUse hooks that automatically enrich grep/glob/bash calls with knowledge graph context.

Community Integrations

Agent	Install	Source
pi	`pi install npm:pi-gitnexus`	pi-gitnexus

MCP Setup (manual)

If you prefer to configure manually instead of using gitnexus setup:

Claude Code (full support — MCP + skills + hooks)

claude mcp add gitnexus -- npx -y gitnexus@latest mcp

Codex (full support — MCP + skills)

codex mcp add gitnexus -- npx -y gitnexus@latest mcp

Cursor / Windsurf

Add to ~/.cursor/mcp.json (global — works for all projects):

{
  "mcpServers": {
    "gitnexus": {
      "command": "npx",
      "args": ["-y", "gitnexus@latest", "mcp"]
    }
  }
}

OpenCode

Add to ~/.config/opencode/config.json:

{
  "mcp": {
    "gitnexus": {
      "command": "npx",
      "args": ["-y", "gitnexus@latest", "mcp"]
    }
  }
}

How It Works

GitNexus builds a complete knowledge graph of your codebase through a multi-phase indexing pipeline:

Structure — Walks the file tree and maps folder/file relationships
Parsing — Extracts functions, classes, methods, and interfaces using Tree-sitter ASTs
Resolution — Resolves imports and function calls across files with language-aware logic
Clustering — Groups related symbols into functional communities
Processes — Traces execution flows from entry points through call chains
Search — Builds hybrid search indexes for fast retrieval

The result is a LadybugDB graph database stored locally in .gitnexus/ with full-text search and semantic embeddings.

MCP Tools

Your AI agent gets these tools automatically:

Tool	What It Does	`repo` Param
`list_repos`	Discover all indexed repositories	—
`query`	Process-grouped hybrid search (BM25 + semantic + RRF)	Optional
`context`	360-degree symbol view — categorized refs, process participation	Optional
`impact`	Blast radius analysis with depth grouping and confidence	Optional
`detect_changes`	Git-diff impact — maps changed lines to affected processes	Optional
`rename`	Multi-file coordinated rename with graph + text search	Optional
`cypher`	Raw Cypher graph queries	Optional

With one indexed repo, the repo param is optional. With multiple, specify which: query({query: "auth", repo: "my-app"}).

MCP Resources

Resource	Purpose
`gitnexus://repos`	List all indexed repositories (read first)
`gitnexus://repo/{name}/context`	Codebase stats, staleness check, and available tools
`gitnexus://repo/{name}/clusters`	All functional clusters with cohesion scores
`gitnexus://repo/{name}/cluster/{name}`	Cluster members and details
`gitnexus://repo/{name}/processes`	All execution flows
`gitnexus://repo/{name}/process/{name}`	Full process trace with steps
`gitnexus://repo/{name}/schema`	Graph schema for Cypher queries

MCP Prompts

Prompt	What It Does
`detect_impact`	Pre-commit change analysis — scope, affected processes, risk level
`generate_map`	Architecture documentation from the knowledge graph with mermaid diagrams

CLI Commands

gitnexus setup                    # Configure MCP for your editors (one-time)
gitnexus analyze [path]           # Index a repository (or update stale index)
gitnexus analyze --force          # Force full re-index
gitnexus analyze --embeddings     # Enable embedding generation (slower, better search)
gitnexus analyze --verbose        # Log skipped files when parsers are unavailable
gitnexus mcp                     # Start MCP server (stdio) — serves all indexed repos
gitnexus serve                   # Start local HTTP server (multi-repo) for web UI
gitnexus list                    # List all indexed repositories
gitnexus status                  # Show index status for current repo
gitnexus clean                   # Delete index for current repo
gitnexus clean --all --force     # Delete all indexes
gitnexus wiki [path]             # Generate LLM-powered docs from knowledge graph
gitnexus wiki --model <model>    # Wiki with custom LLM model (default: gpt-4o-mini)

Remote Embeddings

Set these env vars to use a remote OpenAI-compatible /v1/embeddings endpoint instead of the local model:

export GITNEXUS_EMBEDDING_URL=http://your-server:8080/v1
export GITNEXUS_EMBEDDING_MODEL=BAAI/bge-large-en-v1.5
export GITNEXUS_EMBEDDING_DIMS=1024          # optional, default 384
export GITNEXUS_EMBEDDING_API_KEY=your-key   # optional, default: "unused"
gitnexus analyze . --embeddings

Works with Infinity, vLLM, TEI, llama.cpp, Ollama, LM Studio, or OpenAI. When unset, local embeddings are used unchanged.

Multi-Repo Support

GitNexus supports indexing multiple repositories. Each gitnexus analyze registers the repo in a global registry (~/.gitnexus/registry.json). The MCP server serves all indexed repos automatically.

Supported Languages

TypeScript, JavaScript, Python, Java, C, C++, C#, Go, Rust, PHP, Kotlin, Swift, Ruby

Language Feature Matrix

Language	Imports	Named Bindings	Exports	Heritage	Type Annotations	Constructor Inference	Config	Frameworks	Entry Points
TypeScript	✓	✓	✓	✓	✓	✓	✓	✓	✓
JavaScript	✓	✓	✓	✓	—	✓	✓	✓	✓
Python	✓	✓	✓	✓	✓	✓	✓	✓	✓
Java	✓	✓	✓	✓	✓	✓	—	✓	✓
Kotlin	✓	✓	✓	✓	✓	✓	—	✓	✓
C#	✓	✓	✓	✓	✓	✓	✓	✓	✓
Go	✓	—	✓	✓	✓	✓	✓	✓	✓
Rust	✓	✓	✓	✓	✓	✓	—	✓	✓
PHP	✓	✓	✓	—	✓	✓	✓	✓	✓
Ruby	✓	—	✓	✓	—	✓	—	✓	✓
Swift	—	—	✓	✓	✓	✓	✓	✓	✓
C	—	—	✓	—	✓	✓	—	✓	✓
C++	—	—	✓	✓	✓	✓	—	✓	✓

Imports — cross-file import resolution · Named Bindings — import { X as Y } / re-export tracking · Exports — public/exported symbol detection · Heritage — class inheritance, interfaces, mixins · Type Annotations — explicit type extraction for receiver resolution · Constructor Inference — infer receiver type from constructor calls (self/this resolution included for all languages) · Config — language toolchain config parsing (tsconfig, go.mod, etc.) · Frameworks — AST-based framework pattern detection · Entry Points — entry point scoring heuristics

Agent Skills

GitNexus ships with skill files that teach AI agents how to use the tools effectively:

Exploring — Navigate unfamiliar code using the knowledge graph
Debugging — Trace bugs through call chains
Impact Analysis — Analyze blast radius before changes
Refactoring — Plan safe refactors using dependency mapping

Installed automatically by both gitnexus analyze (per-repo) and gitnexus setup (global).

Requirements

Node.js >= 18
Git repository (uses git for commit tracking)

Privacy

All processing happens locally on your machine
No code is sent to any server
Index stored in .gitnexus/ inside your repo (gitignored)
Global registry at ~/.gitnexus/ stores only paths and metadata

Web UI

GitNexus also has a browser-based UI at gitnexus.vercel.app — 100% client-side, your code never leaves the browser.

Local Backend Mode: Run gitnexus serve and open the web UI locally — it auto-detects the server and shows all your indexed repos, with full AI chat support. No need to re-upload or re-index. The agent's tools (Cypher queries, search, code navigation) route through the backend HTTP API automatically.

License

PolyForm Noncommercial 1.0.0

Free for non-commercial use. Contact for commercial licensing.

Current Tags

1.4.8 ... latest (18 days ago)