{ "ticket": "B02", "date": "2026-09-08", "scenario": "Retain A profile request, logout, sign in as B, submit with B cookies/fresh CSRF and retained request context", "before": { "status": 200, "a": "Private A", "b": "A draft must never enter B" }, "after": { "status": 409, "a": "Private A", "b": "Private B" }, "fixtures": "Permanent Playwright API tests against actual API, Identity/session checks and isolated SQLite; synthetic accounts only", "historicalEvidenceUnchanged": ["probes.mjs", "evidence/observations.json"] }