Start Process Node: Launch subprocesses with custom commands, arguments, and working directories
Kill Process Node: Terminate or force-kill running processes
Global Process Management: Processes are managed globally by key, allowing coordination across the workflow
Cross-Platform: Works on Windows, macOS, and Linux
Automatic Cleanup: Running processes are automatically terminated when ComfyUI exits

Installation

cd ComfyUI/custom_nodes
git clone https://github.com/sebagallo/comfyui-sg-process-manager.git

Nodes

Start Process

Inputs:

trigger (*): Passthrough trigger - node executes when this input is provided
process_key (STRING): Unique identifier for the process (default: "my_process")
command (STRING, multiline): The command to execute
args (STRING, multiline, optional): Arguments for the command (space-separated)
cwd (STRING, multiline, optional): Working directory for the process
buffer_size (INT, optional): Size of output buffer in bytes (default: 1024, min: 1, max: 1048576)
trigger_phrase (STRING, optional): Phrase to wait for in process output before continuing (default: "")
print_output (BOOLEAN, optional): Whether to print process output to console (default: False)
post_start_wait_ms (INT, optional): Milliseconds to wait after process starts (default: 500, min: 0, max: 30000)
trigger_timeout (FLOAT, optional): Seconds to wait for trigger phrase (default: 10.0, min: 0.1, max: 300.0)

Outputs:

trigger (*): Passthrough of the input trigger
pid (INT): Process ID of the started process (0 if failed)
status (STRING): Status message ("Process started successfully" or error message)

Kill Process

Inputs:

trigger (*): Passthrough trigger - node executes when this input is provided
process_key (STRING): Key of the process to terminate (default: "my_process")
force_kill (BOOLEAN, optional): Whether to force kill (default: False)

Outputs:

trigger (*): Passthrough of the input trigger
success (BOOLEAN): Whether the termination was successful
status (STRING): Status message describing the result

List Processes

Inputs:

trigger (*): Passthrough trigger - node executes when this input is provided

Outputs:

trigger (*): Passthrough of the input trigger
process_keys ([STRING]): List of all currently managed process keys

Kill All Processes

Inputs:

trigger (*): Passthrough trigger - node executes when this input is provided

Outputs:

trigger (*): Passthrough of the input trigger
success (BOOLEAN): Whether the operation was successful
status (STRING): Status message describing the result

Kill Process by PID

Inputs:

trigger (*): Passthrough trigger - node executes when this input is provided
pid (INT): Process ID to terminate (default: 0)
force_kill (BOOLEAN, optional): Whether to force kill (default: False)

Outputs:

trigger (*): Passthrough of the input trigger
success (BOOLEAN): Whether the termination was successful
status (STRING): Status message describing the result

Kill Process by Name

Inputs:

trigger (*): Passthrough trigger - node executes when this input is provided
name (STRING): Process name to terminate (e.g., "notepad.exe")
force_kill (BOOLEAN, optional): Whether to force kill (default: False)

Outputs:

trigger (*): Passthrough of the input trigger
success (BOOLEAN): Whether the termination was successful
status (STRING): Status message describing the result

Usage

Use Start Process to launch a subprocess with your desired command and arguments
The process is stored globally using the process_key
Use Kill Process with the same process_key to terminate the process
Both nodes are passthrough - they execute when triggered and pass the trigger value through

Example

[Some Trigger] -> Start Process -> [pid, status] -> Some Other Node
                                    |
                                    v
                               Kill Process <- [Another Trigger]

Notes

Processes are managed globally across the entire ComfyUI session
Only one process can run per process_key at a time
Processes are automatically cleaned up when ComfyUI exits