feat(persona-chat): continue an SMS thread with a persona

Persona conversations can now be anchored on a message in an SMS thread.
Creating one snapshots the thread up to that message (via SMS-API) into the
row; every turn appends it to the persona prompt with guidance to talk like a
text thread rather than write an insight.

Anchored turns get four tools: get_thread_messages (page the thread),
look_at_message_image (local vision on an MMS photo), get_photos_near_time
(library photos with tags and people) and look_at_photo (local vision on a
library photo). The conversation list filters by contact_id.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Cameron CordesandClaude Opus 5.5 committed 2026-10-17 18:07:49 -04:00
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DROP INDEX IF EXISTS idx_persona_chat_anchor_contact;
ALTER TABLE persona_chat_conversations DROP COLUMN anchor_context;
ALTER TABLE persona_chat_conversations DROP COLUMN anchor_ts;
ALTER TABLE persona_chat_conversations DROP COLUMN anchor_message_id;
ALTER TABLE persona_chat_conversations DROP COLUMN anchor_contact_name;
ALTER TABLE persona_chat_conversations DROP COLUMN anchor_contact_id;