The portal-assistant voice gateway needs a Claude that is conversational, free
(on the cluster subscription, no metered API), and safe to sit behind a public
edge. Add POST /v1/conversational: it drives a new no-tools `conversational`
agent with per-conversation --resume so a voice turn keeps context, and is lean
on purpose — no workspace clone, no tools, and crucially NO
--dangerously-skip-permissions (so even a leaked agent can't execute anything).
This is deliberately NOT /v1/chat/completions, which clones the git-crypt infra
repo and runs a Bash-enabled agent per turn (portal-assistant ADR-0002).
The conversational agent replies in the speaker's language (Bulgarian/English),
short and TTS-friendly. Tests cover the argv builder (new vs resume), the happy
path, multi-turn resume across calls, auth, and failure → 503. Full suite green.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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