PRAXO-CORE Dart Core

Dart 3 implementation of the PRAXO-CORE agent contract. The normative contract is spec/; Go remains the reference implementation.

• SPEC_VERSION: 0.2.0
• Core version: 0.1.0
• Tier: core
• License: MIT
• Dependencies: Dart standard library only

Scope

The Core implements all eleven vector groups: toolcall, JSON Schema, plugin, memory, event, stream, checkpoint, policy, context, middleware, and the agent loop. It includes a public API snapshot and a dependency-free test runner.

Build and test

dart run conformance/run.dart
python api-snapshot.py --check
dart run tests/run.dart

Run from the dart/ directory, or use dart language/dart/conformance/run.dart from the repository root.

Quickstart

import 'lib/praxo.dart';

void main() {
  final agent = Agent(AgentOptions(StaticModel('hello')));
  final result = agent.run(const Session(id: 'demo'), 'hello');
  print(result.output);
}

Tools register on the options object:

final registry = Registry();
registry.register(FuncTool('echo', 'Echo arguments', (arguments) => arguments));

final options = AgentOptions(StaticModel('hello'))
  ..tools = registry
  ..maxSteps = 8;

Layout

• lib/ package source.
• conformance/run.dart vector runner.
• api-snapshot.py and api/ public API snapshot.
• tests/run.dart test suite.

Release

Tag shape: dart/v0.1.0. The tag targets SPEC_VERSION 0.2.0.