id property
Canonical spec persona id, e.g. focus.coach.v1. Matches the
id field of the matching JSON file under
syni-spec/personas/{prod,research}/. Sent to the cloud as
persona_id; the server uses it to look up the authoritative
system prompt, rules, budget, and privacy contract.
Local-only consumers may still set this to any stable string, but matching the spec id keeps cloud + local behavior aligned.
Implementation
final String id;