Extract the post-verify orchestration shared across passkey
register-finish, passkey login-finish, magic-link verify-code, and
magic-link click-through into a single completeAuth function. Two
ADRs record the decision:
- ADR-0004: centralize web auth completion (record terms + create
session + redirect) in apps/journal/app/lib/auth/completion.ts.
- ADR-0005: explicitly no AuthMethod polymorphism. Passkey + magic-
link is the entire identity surface; OAuth2/PKCE is session
transport, not a peer method. Recorded as a negative decision so
future architecture passes don't re-suggest extracting the
interface.
CONTEXT.md gains an Authentication section covering completeAuth, the
two methods, the OAuth2-as-transport distinction, and where the Terms
gate enforcement lives (root loader for web, requireApiUser for API
per the just-merged mobile-terms-gate).
OpenSpec change unify-auth-completion captures the proposal, design
(5 decisions including the negative-scope choices), spec delta on
authentication-methods, and 14 tasks. Implementation follows on this
branch.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
