One call carries one HuginnMindRequest to a daemon over CultNet RUDP on the
operation connection and returns the mind's own HuginnMindResponse. Each call
is its own session and nothing survives it. A Deferred answer is fetched on
that session through cultnet-rs's fetch_content, capped at huginn-mind's
MAX_DEFERRED_BODY_BYTES, and decoded, so a caller never sees the deferral.
Refusals are answers. ClientError::Unavailable is the only error and names the
endpoint. The client opens no store and admits nothing.
Tests run a real daemon in-process on a loopback port over a temporary mind,
plus scripted servers for the failures a daemon cannot be made to produce.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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