Multi-agent systems don't fail at the agents. They fail at the handoffs — the seams between agents where context is lost, scope is misread, and the swarm goes incoherent.
The handoff is the unit of multi-agent reliability. A swarm of great agents with bad handoffs is a worse system than one decent agent with no handoffs. The contract at each seam is what keeps the swarm coherent.
The Handoff Contract
Every handoff needs four things, or it's a leak:
- **Role.** What the receiving agent is responsible for.
- **Scope.** What inputs it gets, and what it must return.
- **Context.** What it needs to know from upstream, and what it doesn't.
- **Receipt.** A confirmation the handoff landed and was understood.
Skip any of the four and the swarm loses coherence silently — the worst failure mode, because nobody notices until the output is wrong.
Synergize: The Handoff Is the Collaboration
The handoff is where the agents synergize — and where they don't. A handoff designed as "pass the baton" loses context; a handoff designed as "pass the baton with the receipt" keeps it. The receipt is the cheap mechanism that makes the handoff trustworthy.
What Breaks at the Seam
- Context lost: the receiving agent re-asks or guesses.
- Scope creep: the receiving agent does more than its role.
- No receipt: the upstream agent doesn't know the handoff landed.
- No escalation: a failed handoff has nowhere to go.
How FACTA Frames It
FACTA's multi-agent architecture gives each agent a clear role, scope, and handoff — with observability and guardrails built around the seams. The handoff contract is the part most teams skip and the part that decides whether the swarm holds up in production.
Conclusion
Multi-agent systems fail at the handoffs. The contract — role, scope, context, receipt — at every seam is what keeps the swarm coherent and the failure modes visible.
About FACTA
FACTA helps startups and growth-stage teams turn AI into production systems that keep running — not demos that impress once.
We design the architecture around the parts that actually break under real usage: tooling you own, credentials you control, failover, cost controls, observability. The boring infrastructure that keeps a system alive after launch.
Led by Matías Baglieri and Carolina Fogliato, we focus on one thing:
AI leadership that builds. Not just advises.
Map the handoffs in your swarm against the four-part contract.
Tell us which seam leaks, and we'll help you seal it. See failure isolation for what happens when a handoff fails.
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