The SDK server writes model-API errors (529/500/503) to /tmp/sdk-server.log,
not stdout, so an overload marker can appear only in the durable Claude
transcript — the same rationale already applied to the session-limit
detector. _provider_overload_park_target read only docker logs, so an
overload was missed and the agent crash-respawned straight back into it.
Now concatenates the transcript tail before matching, mirroring the
rate-limit path.
Renn F
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