Someone Else's Retry Logic
Two vendors shipped managed agent runtimes on the same Saturday, Claude Code sessions can now message each other over a socket, and one developer found his review agent had burned six thousand turns supervising two hundred of real work. The tension across all three: the layer nobody wants to own is the layer that decides what everything costs.
Harrison Chase's three-layer stack — model, harness, runtime — arrives the same day Anthropic publishes on managed agents, which means the seam in the middle is now something you buy rather than build.
Anthropic's cross-session messaging docs say plain…
The skinny
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