Public PKCE client on kc.coulomb.social with local and production redirect
URIs. Add register-keycape-client.sh, document env, and harden public-client
token exchange (no secret). Authorize probe verified registered vs reject.
Session probe lands on /vw_pages (Research). Use main designlang extract
with --cookie-file — pack ignores auth. 39 artifacts under
docs/design-extract; tolerate designlang late summary crash when cores exist.
Ran authenticated extract against coulomb.social; session metadata
matched anonymous Bubble defaults, so treat docs/design-extract as a
public shell baseline (PROVENANCE.md). Capture script now refuses to
overwrite storage-state.json with thin anonymous sessions.
Interactive Playwright session capture (XDG storageState, mode 0600)
plus a designlang pack wrapper that never prints secrets. Document the
intended OpenBao lane tenants/binky/coulomb-social/bubble-member for
later password custody; interactive capture is the default for Bubble.
