How It Works
Each /bg prompt spawns a completely separate agent session in a daemon thread: Isolated conversation - the background agent has no knowledge of your current session's history. It receives only the prompt you provide. Same configuration - the background agent inherits your model, provider, toolsets, reasoning settings, and fallback model from the current session. Non-blocking - your foreground session stays fully interactive. You can chat, run commands, or even start more background tasks. Multiple tasks - you can run several background tasks simultaneously. Each gets a numbered ID.
From the official Hermes Agent documentation.