java langgraph-checkpoint

langgraph-java/README.md

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+# LangGraph Java
+
+A Java port of LangGraph, a framework for building stateful, observable applications with large language models (LLMs).
+
+## Project Structure
+
+- `langgraph-checkpoint`: Base persistence interfaces
+- `langgraph-core`: Main library with channels, Pregel, and StateGraph
+- `langgraph-examples`: Example applications
+
+## Requirements
+
+- Java 17 or higher
+- Gradle 7.0 or higher
+
+## Building
+
+```bash
+./gradlew build
+```
+
+## Features
+
+- Graph-based architecture with nodes and edges
+- Type-safe state schema using Java Records
+- Cyclical execution patterns
+- Checkpoint integration for persistence
+- Streaming support
+- Human-in-the-loop capabilities
+
+## Usage Example
+
+```java
+// Create a graph with our schema
+StateGraph<CounterState> graph = new StateGraph<>(CounterState.class);
+
+// Add nodes
+graph.addNode("increment", state -> {
+    Map<String, Object> updates = new HashMap<>();
+    updates.put("count", state.count() + 1);
+    return updates;
+});
+
+// Add edges
+graph.addEdge(START, "increment");
+graph.addEdge("increment", "check");
+
+// Add conditional edge
+graph.addConditionalEdges("check", state -> {
+    if (state.count() >= 3) {
+        return "finish";
+    }
+    return "increment";
+});
+
+// Compile and run
+CompiledStateGraph<CounterState> compiled = graph.compile();
+CounterState result = compiled.invoke(new CounterState(0, ""));
+```
+
+## License
+
+This project is licensed under the MIT License - see the LICENSE file for details.