Core concepts
State, nodes, edges, compilation — the four primitives.
LangGraph
Low-level orchestration for stateful, long-running LLM agents. Explicit state, durable checkpoints, conditional routing, human-in-the-loop. Available in Python and TypeScript with identical mental models.
Choose your language
Section titled “Choose your language” 🐍 Python v1.1.8 · chaptered Zero → Hero tutorial with 10 paginated chapters.
📘 TypeScript v1.3.0 · MessagesZodState, STREAM_EVENTS_V3_MODES, stream transformers, pushMessage.
What you’ll find in both guides
Section titled “What you’ll find in both guides”Multi-agent
Supervisor, parallel workers, handoff patterns.
Memory
Checkpointers for short-term, Stores for cross-thread memory.
Middleware
Pre/post model hooks for guardrails, rate limiting, logging.
Human-in-the-loop
Interrupts, multi-stage approvals, time-travel debugging.
Production
Docker, Kubernetes, observability, LangGraph Cloud.
Not sure which language?
Section titled “Not sure which language?”- Python has the larger ecosystem, more recipes, and the tutorial has been split into 10 paginated chapters for a true zero-to-hero walkthrough.
- TypeScript is best if your app is already Node/browser — identical primitives, full type safety.
Revision history
Section titled “Revision history”| Date | Version | Changes |
|---|---|---|
| 2026-05-05 | Python 1.1.10 / TS 1.3.0 | TypeScript card updated to v1.3.0 with new description. |
| 2026-04-21 | Python 1.1.8 / TS 1.2.9 | Parent index redesigned as language selector. |
| April 16, 2026 | Python 1.1.6 / TS 1.2.8 | Python 3.9 dropped; type-safe v2 API; toolkit package. |
| November 2025 | Python 1.0.3 / TS 1.0.2 | Initial multi-language guide. |