Logos SDK kept all 197 faulted agent sessions in a test

Researchers published a paper with four conditions for plugin-based AI agents that have no host process. A host process is the one piece of software that holds the state of an agent session, and its death ends the session. The authors made a software kit, named Logos, that meets the conditions. In their test it kept each faulted session.

How it works

The four conditions give rules for where state is kept, what carries the record, how recovery is coordinated and how providers are found. An agent that meets them keeps its parts on a bus of peer processes. Its record is in an append-only store that no process owns.

The numbers

• The test had one fault in each of 200 tasks, realized in 197.
• The single-process baseline kept none of the 197 faulted sessions.
• The MCP setup kept its sessions but made 1,212 wasted calls.
• Logos kept each session, wasted no call and kept each record.

What is not known

The same authors made Logos and did the test. The paper compares only two other setups. The authors say that task performance was preserved, and they give formal proofs in supplementary material.

Insight: Agent tools get power before proof of fault tolerance

Vercel Labs released agent-desktop, a tool that lets agents operate computers, with no test results. This paper tests one fault in each of 200 tasks and gives counts. This reads as an order of events: tools that give agents more control come before proof that they operate after faults. Get fault test results from each vendor before agents operate work computers.