Data export format

Requesting an export from account settings produces a signed PDF plus a JSON archive, delivered via a 48-hour secure link.

JSON structure

account, sessions[] (with notes_shared, notes_private, homework[]), threads[], billing[]. All timestamps ISO 8601 UTC.

PDF structure

Cover with account summary; one section per session with shared notes and homework; appendix with message threads chronologically. Signed with Ally's export signing key.