LangGraph.js ReAct Agent template

Dependency freshness

Declared = lowest version the kit's dependency file (package.json, pyproject.toml or requirements.txt) allows. Latest = the npm "latest" tag or the newest PyPI release. TypeScript, the Stripe SDK, FastAPI and other 0.x packages are shown but not counted in the verdict.

What's in the stack

AI

LangChain

Detected from declared dependencies. A listed package means it's installed, not necessarily fully wired up.

What the README says you get

• AI
  LangChain createAgent APIUses `createAgent` for a clean, simple interface
• AI
  Built-in example toolsCalculator, time, weather, and knowledge search examples
• AI
  Custom tool creationCreate tools in `src/tools.ts` using the `tool` function
• AI
  Custom system promptEdit `src/prompts.ts` to change the agent's behavior
• Analytics
  LangSmith tracingAutomatic tracing for debugging and evaluation
• Analytics
  Token usage and latency tracingToken usage and latency
• Other
  TypeScript with ZodFull type safety with Zod schemas
• Testing
  Graph visualizationVisualizing your agent's graph structure
• Testing
  Interactive conversation testingTesting with interactive conversations
• Testing
  State editing for debuggingEditing state to debug specific scenarios

Extracted from the kit's README by a local AI model (deepseek-flash) on Sep 29, 2026. Every item is checked against an exact README quote; 3 unverifiable items were discarded. A README claim is the maker's description, not something we tested.