Pygent 0.2

Pygent is a PyTorch-like framework for composing stateless LLM agents from reusable Module graphs. Version 0.2 provides a single Execution owner for direct and managed calls, an asyncio Runtime, observable model/tool events, OpenAI-compatible adapters, portable tools and MCP adapters, ReAct, SQLite recovery, and HTTP/SSE workers.

First principles

Pygent 0.2 第一原则 is the repository's highest authority. Module-specific first principles, SDK contracts, tests, examples, and code derive from it.

Quickstart

from pygent import AIMessage, Context, Module, UserMessage


class Echo(Module[UserMessage, AIMessage]):
    async def forward(self, message, context):
        output = AIMessage(content=message.content.upper())
        return output, context + message + output


message, context = await Echo().invoke(UserMessage(content="hello"), Context())

Direct invoke(), stream(), and start() need no Runtime. Bind the same graph to LocalRuntime when the application needs bounded concurrency, cancellation, deadlines, remote placement, durable history, or advanced Execution control. Both modes execute the same forward() graph and return (message, context); see the 0.2 Execution contract.

Documentation

渐进式 Agent 开发教程 — 从零密钥离线示例到工具、流式、Runtime 与动态模型配置
Layered documentation
Execution contract
Module, Context, Runtime
Agent, LLM, Tool
Executionnable service example
Runnable tutorial example
Native full-path load system

Development

uv sync --all-extras
uv run pytest -q
uv run ruff check src tests examples benchmarks
uv run mypy src benchmarks
uv build
python -m examples.service.main
uv run --extra performance python -m benchmarks run synthetic-smoke

Python 3.11+ is required. Apache-2.0; see LICENSE.

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Release history Release notifications | RSS feed

0.2.17

Aug 20, 2026

0.2.16

Aug 19, 2026

0.2.15

Aug 16, 2026

0.2.14

Aug 14, 2026

This release

0.2.13

Aug 13, 2026

0.2.12

Aug 13, 2026

0.2.11

Aug 11, 2026

0.2.10

Aug 11, 2026

0.2.9

Aug 10, 2026

0.2.8

Aug 9, 2026

0.2.7

Aug 9, 2026

0.2.6

Aug 9, 2026

0.2.5

Aug 8, 2026

0.2.4

Aug 8, 2026

0.2.3

Aug 8, 2026

0.2.2

Aug 7, 2026

0.2.1

Aug 7, 2026

0.2.0

Aug 5, 2026

0.1.15

Jun 28, 2026

0.1.14

Jun 15, 2026

0.1.13

Jun 8, 2026

0.1.12

Jun 5, 2026

0.1.11

May 31, 2026

0.1.10

May 31, 2026

0.1.9

May 29, 2026

0.1.8

May 28, 2026

0.1.7

May 28, 2026

0.1.6

May 28, 2026

0.1.5

May 27, 2026

0.1.4

Apr 20, 2026

0.1.3

Mar 15, 2026

0.1.2

Mar 15, 2026

0.1.1

Mar 14, 2026

pygent-ai 0.2.13

Pygent 0.2

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