Stdlib Python app (docs/spikes/k0/app.py) on localhost:8765: lists Swedish ASPSPs, starts BankID authorisation with the registered https redirect and a paste box for the landed address, creates the session, fetches transactions with and without PSU headers (continuation_key paging), balances, diff between fetches and an aggregate analysis block. Key and state in the git-ignored docs/spikes/k0/.local/.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
