fix(better-auth): add account.issuer column for Better Auth 1.7

[brillout]

Problem

Every scaffolded better-auth app currently fails on sign-up:

ERROR [Better Auth]: D1_ERROR: table account has no column named issuer: SQLITE_ERROR
AssertionError: expected 500 to be 200   // e2e "auth: email/password flow"

Better Auth 1.7 (published 2026-08-18) scopes account identity by issuer and adds a required issuer column to the account table. Bati declares better-auth: ^1.6.26, so fresh installs resolve 1.7.x while the two schemas Bati maintains by hand are still on the 1.6 shape. It reached CI as dependency drift rather than through any commit — main's last green Tests run predates the 1.7.0 release.

Diffing Better Auth's own generated schema between 1.6.30 and 1.7.1 shows the delta is exactly the new column (plus a account_issuer_accountId_uidx index — see below):

-- 1.7.1
create table "account" ("id" text not null primary key, "issuer" text not null, "accountId" text not null, ...)

Changes

• files/database/migrations/$better-auth.sql.ts — add "issuer" text NOT NULL to the wrangler D1 migration (Cloudflare D1 without an ORM).
• files/database/drizzle/schema/auth.ts — add the column to the account table, both the pg and sqlite variants.
• package.json ×4 — raise the better-auth floor to ^1.7.1 (the better-auth boilerplate plus the react/solid/vue client boilerplates, kept in lockstep). The shipped schema now requires 1.7: on 1.6 the new NOT NULL column would have no value written to it.
• bun.lock — resolves to 1.7.1, the version CI already installs.

The Kysely path (better-auth:migrate) needs no change — it builds its tables from Better Auth's own getMigrations(), so it picked up issuer on its own.

Not included: Better Auth also generates a unique index account_issuer_accountId_uidx. Neither schema here carries any of its indexes today (not session_userId_idx, account_userId_idx, or verification_identifier_idx), and nothing in 1.7 depends on it — there is no ON CONFLICT path in the library — so adding indexes is left as a separate consistency pass.

Verification

bun run check-types, bun run lint, bun run test all pass.

E2E on the three engine paths that run in this environment, 13/13 tests each, including the auth: email/password flow case that was failing:

Combo	Path
react+hono+cloudflare+better-auth+sqlite	D1 migration (Kysely adapter)
react+fastify+better-auth+sqlite+drizzle	Drizzle schema
react+hono+better-auth+sqlite	better-auth:migrate (Kysely)

The postgres+drizzle combos could not run locally (no Docker daemon); their schema change is the sibling branch of the same file, and CI covers them.

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Generated by Claude Code

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📥 Commits

Reviewing files that changed from the base of the PR and between c0819df and c728619.

⛔ Files ignored due to path filters (1)

• bun.lock is excluded by !**/*.lock

📒 Files selected for processing (6)

• boilerplates/better-auth/files/database/drizzle/schema/auth.ts
• boilerplates/better-auth/files/database/migrations/$better-auth.sql.ts
• boilerplates/better-auth/package.json
• boilerplates/react-better-auth/package.json
• boilerplates/solid-better-auth/package.json
• boilerplates/vue-better-auth/package.json

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