This release is a pre-release and may not be stable for production use.
psi-agent
用 Python socket 拼装 AI agent 的微框架。
你只需要写 Python 函数和 Markdown——剩下的 socket 通信、tool calling、SSE 流式、定时任务框架全替你做了。
为什么选它
- 简单组合:ai、session、channel 三个独立进程,socket 对插即用。没有中心配置,不依赖数据库
- Workspace 即 Agent:在
workspace/下丢几个 Python 函数就是 tools,写个 system prompt 就是 agent 人格,加个 cron 就是定时任务 - 流式交互:REPL 实时显示 AI 思考过程(dim 样式)和最终回复,所见即所得
架构
用户 ←→ Channel (REPL/CLI) ──Unix socket── Session ──Unix socket── AI (OpenAI/Anthropic)
快速开始
需要 Python >= 3.14
三个终端,三步跑起来:
# 安装
uv sync
# 终端 1:启动 AI 后端(--api-key 可选,不传则读 OPENAI_API_KEY 环境变量)
uv run psi-agent ai openai-completions \
--session-socket ./ai.sock \
--model gpt-4o-mini \
--api-key $OPENAI_API_KEY \
--base-url https://api.openai.com/v1
# 终端 2:启动 Session
uv run psi-agent session \
--workspace ./examples/a-simple-bash-only-workspace \
--channel-socket ./channel.sock \
--ai-socket ./ai.sock
# 终端 3:REPL 交互
uv run psi-agent channel repl --session-socket ./channel.sock
REPL 操作:Enter 换行,Alt+Enter 发送,Ctrl+D 退出。
也可以一句命令搞定:
uv run psi-agent channel cli \
--session-socket ./channel.sock \
--message "列出当前目录的文件"
CLI 一览
psi-agent
├── ai
│ ├── openai-completions # OpenAI 兼容透传
│ └── anthropic-messages # Anthropic→OpenAI 转换
├── session # Session + workspace 管理
└── channel
├── repl # 交互式 REPL
└── cli # 单次消息
定义你自己的 Agent
一个 workspace 就是一个 agent:
my-workspace/
├── tools/ # 每个 .py 文件定义一个 tool
│ └── bash.py # async def bash(command: str) -> str
├── skills/ # */SKILL.md 技能文档(system_prompt_builder 自行遍历)
├── schedules/ # 定时任务
│ └── daily-report/
│ └── TASK.md # YAML 头 (name, cron) + Markdown body
└── systems/
└── system.py # async def system_prompt_builder() -> str
Tool 就是一个 async 函数,函数名 = 文件名,参数类型自动映射为 JSON Schema:
# tools/bash.py
import anyio
async def bash(command: str) -> str:
"""Execute a bash command.
Args:
command: The command to run.
"""
result = await anyio.run_process(["/bin/bash", "-c", command])
return result.stdout.decode().strip()
定时任务的 body 会在 cron 触发时作为消息发送给 AI:
---
name: daily-report
cron: "0 12 * * *"
---
请生成一份项目进展日报。
更多细节见 examples/a-simple-bash-only-workspace/。
开发
uv run ruff check . # lint
uv run ruff format --check . # 格式
uv run ty check # 类型
uv run pytest -v # 测试
作者
Hao Zhang hzhangxyz@outlook.com
许可
GNU Affero General Public License v3.0 or later. 详见 LICENSE。
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