Gust

Gust is a DAG-based workflow orchestration engine for Elixir.

Runtime roles

Set GUST_ROLE to control which parts of the runtime start:

• single: default mode; runs the web-facing and execution-oriented parts together.
• core: runs DAG scheduling and execution workers without the web UI.
• web: loads DAG definitions for the UI, but does not run DAG execution workers.
• console: loads DAG definitions and supporting runtime services for CLI or IEx usage, but skips DAG pooling workers.

Console usage

Use console when you want to inspect DAGs, run CLI commands, or open IEx without starting execution workers:

GUST_ROLE=console iex -S mix
mix gust.cli your_command_here

The mix gust.cli task defaults GUST_ROLE to console automatically, and release builds provide a gust-cli wrapper with the same behavior.