Any agent management system should have hierarchical, user-defined system prompts.

Isomux has 3 layers:

Office-wide > Per-room > Per-agent

When you start a new conversation, all of those get concatenated and set as preamble.

This has been surprisingly nice at avoiding the typical churn of reexplaining stuff with each new session.

For example:
- all my agents know my preferred dev workflow (office-wide context)
- but only those working on isomux have the instructions for restarting the isomux server ("Isomux dev" room context)
- and only the agent in charge of updating the docs also knows my preferred voice (the "Isomux Writer" Agent)

I believe this is not about isomux, but a *general principle* that anyone building agent management systems should adopt.

I added an /isomux-system-prompt slash command so you can see the full concatenated system prompt for the current agent (including the non-user-defined part at the top).

This is all described in more detail in my "build-in-public" isomux design, Agent Identity section: nilmamano.com/blog/isomux#agent-identity

Hierarchical prompts are also nice in the context of multi-user systems (like isomux). There can be a root "team-wide prompt", and then the root can have a child for each team member, and then additional descendants.