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Server Configuration

Describes the environment variables required to run the server.

NameRequiredDescriptionDefault
PROC_MCP_ALLOWNoComma-separated allowlist of commands (e.g. python3,r2,sh). Use "*" to allow everything. By default nothing is allowed.
UV_DEFAULT_INDEXNoMirror index for uv if PyPI is not reachable (e.g. https://pypi.tuna.tsinghua.edu.cn/simple).
PROC_MCP_ENV_DENYNoComma-separated denylist of environment variable overrides from clients.
PROC_MCP_ENV_ALLOWNoComma-separated allowlist of environment variable overrides from clients. Blocks PATH, LD_*, DYLD_* by default.
PROC_MCP_TMUX_KEY_DELAY_MSNoDelay in milliseconds between key submissions for tmux send_keys. Tune if a TUI needs slower timing.

Capabilities

Features and capabilities supported by this server

CapabilityDetails
tools
{
  "listChanged": false
}
prompts
{
  "listChanged": false
}
resources
{}

Tools

Functions exposed to the LLM to take actions

NameDescription
open_sessionB

Spawn a stateful subprocess session (PTY by default). Returns a session id.

list_sessionsB

List active sessions.

sendC

Send raw input to a session's stdin.

readC

Read accumulated output from a session.

runB

Convenience: send a command then read until output is idle.

close_sessionC

Terminate a session and free resources.

tmux_open_sessionB

Start a detached tmux session running a command (useful for full-screen TUI apps like vim/htop). Returns a tmux session id.

tmux_list_sessionsA

List active tmux sessions created by this server.

tmux_send_keysA

Send key tokens to a tmux session's active pane (supports keys like Enter, Escape, C-c, Up, Down).

tmux_stepA

Send keys, wait briefly for redraw, then return a pane snapshot (one roundtrip for TUIs).

tmux_capture_paneB

Capture the current pane contents as text.

tmux_resizeC

Resize a tmux session window.

tmux_close_sessionC

Kill a tmux session created by this server.

Prompts

Interactive templates invoked by user choice

NameDescription

No prompts

Resources

Contextual data attached and managed by the client

NameDescription

No resources

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