shell-session-manager 2.2.0

Async subprocess session manager with incremental stdin/stdout/stderr support

shell-session-manager

shell-session-manager provides async subprocess sessions that can be resumed across multiple calls. It drains stdout/stderr in background asyncio tasks, supports incremental stdin writes, exposes short session ids, and manages best-effort cleanup for long-lived command sessions.

Command construction is intentionally out of scope: callers should pass the exact command string they want to execute, including any shell, SSH, PTY, or environment bootstrap wrappers.

Usage

import anyio

from shell_session_manager import ShellSession, ShellSessionOptions


async def main() -> None:
    async with ShellSession(
        "python -u -c 'import sys; print(\"ready\"); line = sys.stdin.readline(); print(line.upper(), end=\"\")'",
        options=ShellSessionOptions(timeout_seconds=1),
    ) as session:
        stdout, stderr, code = await session.next()
        print(stdout.decode(), stderr.decode(), code)  # ready\n, "", None

        stdout, stderr, code = await session.next(b"hello\n")
        print(stdout.decode(), stderr.decode(), code)  # HELLO\n, "", 0


anyio.run(main)

For multiple long-lived sessions, use ShellSessionManager:

import anyio

from shell_session_manager import ShellSessionManager


async def main() -> None:
    async with ShellSessionManager() as manager:
        session_id = await manager.new_shell("python -c 'print(42)'")
        stdout, stderr, returncode = await manager.next(session_id)
        print(stdout.decode(), stderr.decode(), returncode)


anyio.run(main)

shellctl server

Run the HTTP API locally with:

pdm run shellctl serve --listen 127.0.0.1:8765

Pass --auth-token your-token when you want bearer auth enforced. shellctl serve also reads SHELLCTL_AUTH_TOKEN, so you can export the token instead of passing the flag. Leave the flag/env var unset or empty to start without requiring an Authorization header.