{"session":{"id":"fb86b7421a854a78a447","domain":"english","email":null,"language":"en","phase":"discovery","title":null,"problem_statement":null,"profile":{"level":"","context":"démo publique","known":""},"payload":{},"created_at":"2026-07-21T10:48:38.627271","updated_at":"2026-07-21T10:48:38.627295","solution_revealed":false,"is_demo":true},"messages":[{"id":227,"role":"user","kind":"text","content":"Demo: I need to write a polite but firm email to a client who hasn't paid an invoice that is 30 days overdue. CEFR level B1. I drafted something but it sounds too aggressive.","created_at":"2026-07-21T10:48:38.636654","meta":{}}],"media":[],"feedback":[]}