# ADR 4: One Zulip Bot Per Agent

**Date**: 2026-04-28

### Decision
Each agent has its own dedicated Zulip bot user, co-located on the agent's CT. Each bot runs independently as a platform-native plugin.

### Context
A single bot creates a single point of failure and requires message routing to the correct agent. Per-agent bots provide full isolation — if tanko's bot fails, mumuni's bot continues working. Co-location means zero A2A overhead for the local agent.

### Consequences
- 6 Zulip bot users to create and manage
- 6 independent event streams (one per CT)
- @all-bots requires each bot to know about `All Bots` user
- Adding a new agent = create Zulip bot + deploy plugin to CT