Decide how new users create accounts - magic link only, email/password, social auth options, or invite-only.

This affects the signup UI and auth configuration. Consider the early-adopter ICP (early-stage startups using AI coding tools like Claude Code, Cursor).

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Decided Approach

GitHub OAuth + Magic Link + Toggleable Invite Gate

Auth methods:

• Primary: GitHub OAuth (single-click for developers)
• Fallback: Magic link (for users without GitHub)
• No password auth

Invite gate:

• Controlled by REQUIRE_INVITE_CODE env var
• When true: Signup requires valid invite code
• When false: Open signups

Implementation:

1. Enable GitHub OAuth in Supabase dashboard
2. Add "Continue with GitHub" button (primary)
3. Keep magic link as secondary
4. Remove password auth
5. Create invites table
6. Add invite validation endpoint
7. Conditional signup UI based on env var

Decision: 1f550e4