opentraceai 0.3.0rc21

OpenTrace Python agent — maps system architecture, code structure, and service relationships into a knowledge graph

OpenTrace

Index any codebase into a knowledge graph — then query it with AI via MCP.

OpenTrace parses source code with tree-sitter, extracts classes, functions, imports, and call relationships, and stores the result in an embedded graph database. The graph is queryable through a built-in MCP server, so tools like Claude Code can search, traverse, and understand your codebase structure.

Install

pip install opentraceai

Or run directly with uv:

uvx opentraceai index .

Requires Python 3.12+.

Quick Start

1. Index a codebase

opentraceai index /path/to/repo

This parses every supported file, extracts symbols and relationships, and writes the graph to ./otindex.db.

$ opentraceai index ~/projects/myapp
Opening LadybugDB at ./otindex.db ...
Indexing /home/user/projects/myapp ...
  1284 nodes, 3421 relationships, 187 files, 95 classes, 412 functions
Done in 4.2s.

2. Query via MCP

Start a stdio MCP server against the indexed database:

opentraceai mcp --db ./otindex.db

This exposes graph query tools over stdin/stdout for any MCP-compatible client.

Claude Code

Add OpenTrace to Claude Code as a plugin, or configure it manually in your project's .mcp.json:

{
  "mcpServers": {
    "opentrace": {
      "type": "stdio",
      "command": "uvx",
      "args": ["opentraceai", "mcp", "--db", "./otindex.db"]
    }
  }
}

MCP Tools

Tool	Description
search_graph	Full-text search across nodes by name or properties
list_nodes	List nodes by type (Class, Function, Service, etc.)
get_node	Get a node's full details and immediate neighbors
traverse_graph	Walk relationships from a node (outgoing, incoming, or both)
get_stats	Get graph statistics — node/edge counts broken down by type

Supported Languages

Full extraction (symbols + calls + imports)	Structural extraction (symbols only)
Python, TypeScript/JavaScript, Go	Rust, Java, Kotlin, C#, C/C++, Ruby, Swift

Config and data files (JSON, YAML, TOML, Protobuf, SQL, GraphQL, Bash) are indexed as file nodes.

CLI Reference

opentraceai index [PATH] [OPTIONS]

Option	Default	Description
PATH	.	Directory to index
--db	./otindex.db	Database path
--repo-id	directory name	Repository identifier
--batch-size	200	Items per write batch
-v, --verbose	off	Debug logging

opentraceai mcp [OPTIONS]

Option	Default	Description
--db	./otindex.db	Database path
-v, --verbose	off	Debug logging

Part of OpenTrace

This package is the CLI/MCP component of OpenTrace, an open-source platform for mapping system architecture into knowledge graphs. The full project also includes a browser-based graph explorer at oss.opentrace.ai.

License

Apache License 2.0