bashkit 0.1.8

Python bindings for Bashkit - a sandboxed bash interpreter for AI agents

Bashkit Python Bindings

Python bindings for Bashkit - a virtual bash interpreter for AI agents.

Features

• Sandboxed, in-process execution: All commands run in isolation with a virtual filesystem
• 68+ built-in commands: echo, cat, grep, sed, awk, jq, curl, find, and more
• Full bash syntax: Variables, pipelines, redirects, loops, functions, arrays
• Resource limits: Protect against infinite loops and runaway scripts
• LangChain integration: Ready-to-use tool for LangChain agents

Installation

# From PyPI (when published)
pip install bashkit

# With LangChain support
pip install 'bashkit[langchain]'

# From source
pip install maturin
maturin develop

Quick Start

import asyncio
from bashkit import BashTool

async def main():
    tool = BashTool()

    # Simple command
    result = await tool.execute("echo 'Hello, World!'")
    print(result.stdout)  # Hello, World!

    # Pipeline
    result = await tool.execute("echo -e 'banana\\napple\\ncherry' | sort")
    print(result.stdout)  # apple\nbanana\ncherry

    # Virtual filesystem
    result = await tool.execute("""
        echo 'data' > /tmp/file.txt
        cat /tmp/file.txt
    """)
    print(result.stdout)  # data

asyncio.run(main())

LangChain Integration

from bashkit.langchain import create_bash_tool
from langchain.agents import create_agent

# Create tool
bash_tool = create_bash_tool()

# Create agent
agent = create_agent(
    model="claude-sonnet-4-20250514",
    tools=[bash_tool],
    system_prompt="You are a helpful assistant with bash skills."
)

# Run
result = agent.invoke({
    "messages": [{"role": "user", "content": "Create a file with today's date"}]
})

Configuration

tool = BashTool(
    username="agent",           # Custom username (whoami)
    hostname="sandbox",         # Custom hostname
    max_commands=1000,          # Limit total commands
    max_loop_iterations=10000,  # Limit loop iterations
)

Synchronous API

from bashkit import BashTool

tool = BashTool()
result = tool.execute_sync("echo 'Hello!'")
print(result.stdout)

API Reference

BashTool

• execute(commands: str) -> ExecResult: Execute commands asynchronously
• execute_sync(commands: str) -> ExecResult: Execute commands synchronously
• description() -> str: Get tool description
• help() -> str: Get LLM documentation
• input_schema() -> str: Get JSON input schema
• output_schema() -> str: Get JSON output schema

ExecResult

• stdout: str: Standard output
• stderr: str: Standard error
• exit_code: int: Exit code (0 = success)
• error: Optional[str]: Error message if execution failed
• success: bool: True if exit_code == 0
• to_dict() -> dict: Convert to dictionary

License

MIT