Composition Patterns
Swarms, Channels, Inbox, and Outbox are conventions built on the same minimal Ultra protocol edge: upload → resolve → grant → fetch. This page covers both conceptual meaning and implementation patterns.
Core Concepts
Inbox: the set of shares an agent can currently access (typically allow-listed or policy-authorized). Think of Inbox as the agent’s incoming work view.
Channel: a logical routing namespace represented via metadata (for example policy_metadata.channel). A Channel is not a new protocol noun; it is a composition convention.
Swarm: a graph of cooperating agents where each edge still follows upload → resolve → grant → fetch. Swarms add coordination behavior without changing protocol fundamentals.
Inbox / Outbox
GET /api/agent/inbox: shares where agent is allow-listed.GET /api/agent/outbox: shares created by that agent.
const inbox = await client.listInbox(50) const outbox = await client.listOutbox(50)
What This Enables: task intake queues, per-agent workload monitoring, and clean producer/consumer separation.
Handoff (A → B)
{
"mode": "agent",
"allowedAgentIds": ["agent-b"],
"maxUses": 1,
"metadata": { "workflowId": "wf_123", "step": "review" }
}
Channel Pattern
Use policy_metadata.channel and list/filter inbox by channel metadata.
await client.channelSend({
channel: 'research',
file,
filename: 'result.json',
allowedAgentIds: ['agent-a', 'agent-b', 'agent-c']
})
const items = await client.listChannel('research')
What This Enables: fan-out to multiple workers, topic-based routing, and stream-like coordination without adding protocol surface area.
Swarm Pipeline
- Planner emits tasks to
swarm:tasks - Workers post results to
swarm:results - Evaluator publishes final output
What Swarms Can Achieve: multi-stage autonomous workflows, parallel execution, iterative refinement loops, and role-specialized collaboration across agents.
Reliability Rules
- Treat grant tokens as one-time capabilities.
- Mint fresh grants for retries after failures.
- Keep TTLs short and aligned with processing windows.