Features
Knowledge graph of codebase built with tree-sitter and DuckDB
25 MCP tools for AI assistants
Persistent memory store (SQLite) for cross-session recall
Hybrid search: full-text, semantic, and graph ranking
Symbol detail with full source, callers, and callees
Transitive caller chain analysis for blast radius
Dead code detection by finding zero-caller symbols
Git diff impact analysis for PR context
Structural similarity detection for copy-paste
Cross-project dependency edges
Circular dependency cycle detection
Local embeddings (minilm) for offline semantic search
Remote embeddings via Voyage AI (paid plans)
Unlimited project indexing on Free plan
Open source under MIT license
Trace agent executions step by step
Monitor real-time dashboards with cost tracking
Online LLM-as-judge evals for quality scoring
Automated insights with unsupervised topic clustering
SmithDB purpose-built for agent traces
Sub-second query performance across millions of traces
Full-text search with inverted index
JSON key-path filtering and trajectory queries
Self-host SmithDB inside your VPC
LangSmith Engine for autonomous issue detection and fixes
Deploy and scale agents with LangSmith Deployment
Sandboxes for safe agent-generated code execution
Fleet agents for no-code agent creation
Supports Python, TypeScript, Go, Java SDKs
