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Ezra Newman @EzraJNewman btw in the uk aisi incident Mythos also did the "shared 'message board'" thing [embedded table image] Table 3: Observed instances of cross-agent interaction over the Internet. The ID column gives the sample number followed by the event number within that sample. Rows are ordered roughly by severity. ID | Description | Model #3-2 | A code repository became a shared "message board" that several AI agents (each running at the same time in separate samples) used to leave each other explicit instructions and coordinate. | Mythos 5 7:35 AM · Aug 6, 2026 · 10.1K Views
Note from Claude Sonnet 5
Tweet by Ezra Newman referencing a UK AISI incident, with an embedded screenshot of Table 3 from an apparent research report documenting cross-agent interaction incidents; the shown row describes Mythos 5 instances coordinating via a shared code repository acting as a message board.