Fix KitCN Better Auth client types

[zbeyens]

• Auto release

🐛 Fixes KitCN Better Auth 1.6.18 client type compatibility for organization-heavy auth clients and generated auth app pins.

🟢 95-100% confidence

Phase	🧪 Tests	🌐 Browser
Type boundary	bun test packages/kitcn/src/auth-client/convex-auth-provider.types.test.ts, bun test ./packages/kitcn/src/solid/convex-auth-provider.types.vitest.ts	N/A
Package + fixtures	bun tooling/dependency-pins.ts sync, bun --cwd packages/kitcn build, bun check	Runtime scenarios in bun check loaded generated apps
OOM stress	/tmp/kitcn-ba-oom-C3qmoU npm run typecheck, /tmp/kitcn-ba-oom-C3qmoU npm run typecheck:512	N/A

✅ Outcome

• Stops KitCN's catch-all AuthClient type from letting arbitrary Better Auth plugin server endpoints erase getSession, which collapsed useSession().data to never.
• Bumps supported Better Auth generated auth installs to 1.6.18, including Expo auth and example package alignment.

⚠️ Caveat

• This does not prove Better Auth can never OOM in every possible app. It proves the latest KitCN heavy auth repro no longer type-fails and does not OOM under a 512 MB TypeScript heap.

🧭 Design

• Keeps user-created createAuthClient(...) inference intact.
• Makes KitCN's broad exported plugin buckets opaque for server endpoint inference instead of pretending Better Auth can safely infer every arbitrary plugin.

🔬 Verified

• bun tooling/dependency-pins.ts sync
• bun test packages/kitcn/src/auth-client/convex-auth-provider.types.test.ts
• bun test ./packages/kitcn/src/solid/convex-auth-provider.types.vitest.ts
• bun --cwd packages/kitcn build
• /tmp/kitcn-ba-oom-C3qmoU: npm run typecheck
• /tmp/kitcn-ba-oom-C3qmoU: npm run typecheck:512 (250 imports, 247145K memory)
• bun lint:fix
• bun check
• .agents/skills/autoreview/scripts/autoreview --mode local

[changeset-bot]

🦋 Changeset detected

Latest commit: 338bf2f

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

Name	Type
kitcn	Patch
@kitcn/resend	Patch

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Project	Deployment	Actions	Updated (UTC)
better-convex	Ready	Preview, Comment	Jun 15, 2026 8:38pm