[kylemac]

Description

Adds a view-only sign-in feature to @clerk/mosaic that renders the combined sign-in-or-up flow as nine Flow steps: start (social providers, "or" divider, email field), password with identity preview and forgot-password link, email code, authenticator code, backup code, method picker, help, sign-up details, and verify email. The code, backup code, picker, and help steps reuse the reverification feature's step components; only the start, password, identity preview, and sign-up steps are new, and the strings register as a new signIn message namespace. There is no model or controller yet, so nothing is wired to Clerk. Swingset gets a SignIn page under a new Authentication group, marked wip: needs wire-up, whose Default story walks the whole flow on mock data (an email containing new takes the sign-up path, error or 000000 renders an attempt error) alongside isolated panels for each step and state.

Checklist

• pnpm test runs as expected.
• pnpm build runs as expected.
• (If applicable) JSDoc comments have been added or updated for any package exports
• (If applicable) Documentation has been updated

Type of change

• 🐛 Bug fix
• 🌟 New feature
• 🔨 Breaking change
• 📖 Refactoring / dependency upgrade / documentation
• other:

[vercel]

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Project	Deployment	Actions	Updated
clerk-js-sandbox	Ready	Preview	Oct 21, 2026 4:43pm UTC
swingset	Ready	Preview	Oct 21, 2026 4:43pm UTC

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🦋 Changeset detected

Latest commit: dd4c1c1

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