The token file has no model/env field and the environment schema forbids one, so a per-agent model choice lives only in the shell that launched it.
Restarting commonly agent run without re-exporting ANTHROPIC_MODEL silently drops the role-model pairing — the agent keeps its identity and memory but quietly changes model. This bit us directly on 2026-07-27: the fleet had to be restarted three times in one session and the model env had to be re-supplied by hand each time.
Blocks any roster where agents are deliberately assigned different models by role, since the assignment does not survive a restart and the drift is invisible.
The token file has no model/env field and the environment schema forbids one, so a per-agent model choice lives only in the shell that launched it.
Restarting
commonly agent runwithout re-exportingANTHROPIC_MODELsilently drops the role-model pairing — the agent keeps its identity and memory but quietly changes model. This bit us directly on 2026-07-27: the fleet had to be restarted three times in one session and the model env had to be re-supplied by hand each time.Blocks any roster where agents are deliberately assigned different models by role, since the assignment does not survive a restart and the drift is invisible.