PRAXO-CORE C++ Core

C++20 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: C++20 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

With CMake and a C++20 compiler:

cd language/cpp
cmake -S . -B build
cmake --build build
ctest --test-dir build --output-on-failure
python api-snapshot.py --check

With Zig on Windows:

cd language/cpp
zig c++ -std=c++20 -Iinclude src/agent.cpp src/jsonschema.cpp src/middleware.cpp `
  src/plugin.cpp src/runtime.cpp src/toolcall.cpp conformance/main.cpp `
  conformance/run.cpp -o build/praxo-cpp-conformance.exe
.\build\praxo-cpp-conformance.exe

Quickstart

#include "praxo/agent.hpp"

praxo::AgentOptions options(std::make_shared<praxo::StaticModel>("hello"));
auto result = praxo::run_agent(
    std::move(options),
    praxo::Session{"demo", {}},
    "hello",
);
std::cout << result.output << "\n";

Tools register on the options object:

auto registry = std::make_shared<praxo::ToolRegistry>();
registry->register_tool(std::make_shared<praxo::FuncTool>(
    "echo", "Echo arguments",
    [](https://github.com/axisvela/praxo-core/blob/main/language/cpp/const praxo::Json& arguments) { return arguments; }));
options.tools = registry;

Layout

• include/praxo/ public headers.
• src/ implementation.
• conformance/ vector runner.
• tests/ core tests.
• api-snapshot.py and api/ public API snapshot.

Release

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