feat(migrate): add export authjs and Auth.js imports

[royanger]

PR 11 of 13 for clerk migrate (plan: slice-prs.md on #479). Stacked on #528: review that first, then this one, which shows only its own diff. It adds Auth.js export and import. Still behind CLERK_EXPERIMENTAL=migrate.

Try it

CLERK_EXPERIMENTAL=migrate clerk migrate export authjs --db-url "$AUTHJS_DB_URL"
CLERK_EXPERIMENTAL=migrate clerk migrate import <export-run-id> --dry-run

What it does

• export authjs reads id, name, email and emailVerified from a table called User, user or users. It falls back to email_verified for the legacy NextAuth table or a Prisma @map.
• A schema that renames another column gets a message with the query to run instead, aliasing the column back.

Reviewing

Ported from #479 at 7a820406. sources/authjs.ts and export/authjs.ts match #479. One change from #479: the missing-column hint in lib/db.ts no longer tells you to write your own query for @map("email_verified"), which the exporter now reads. Its example is a renamed name column instead.

Tests

• bun run test covers the unit and integration tests.
• The live slice suite (pnpm test:migrate:slice4e) exports from the real Auth.js test app, including a snake_case email_verified schema with half the users unverified.

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🦋 Changeset detected

Latest commit: 5c1d1be

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

This PR includes changesets to release 1 package

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clerk	Minor

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📝 Walkthrough

The migration CLI now exports users from Auth.js databases and registers Auth.js as a migration source. Export searches supported user tables and verification columns, then maps rows to exported users. Import maps user fields, routes users based on email verification timestamps, and splits names. Shared database export handling converts valid dates to ISO strings and omits invalid dates. Tests and documentation cover both migration paths, connection options, and data that Auth.js does not carry.

Priority: ➖ Normal

Estimated code review effort: 3 (Moderate) | ~25 minutes

Merge Risk: 🔵 Low · up to 5c1d1

The Auth.js export warning may send some users looking for credentials in database tables even when their application stores them elsewhere. This is a bounded migration-planning documentation risk; the other tracked concerns are corrected.

Pre-merge checks: 4 · 1

Failed checks: 1 warning

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 77.78% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 18 functions across 19 files. (1 skipped:…	Write docstrings for the functions missing them to satisfy the coverage threshold.

Passed checks: 4 passed

Check name	Status	Explanation
Title check		The title clearly identifies the main changes: adding Auth.js export and import support to migrate.
Description check		The description directly explains the Auth.js export and import changes, usage, behavior, testing, and experimental status.
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

Full details: Docstring Coverage

Explanation

Docstring coverage is 77.78% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 18 functions across 19 files. (1 skipped: 1 unsupported.)

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Actionable comments posted: 1

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Inline comments:
Review comments at @packages/cli-core/src/commands/migrate/export/authjs.ts:
- Line 180: Update the Auth.js warning in the export flow to acknowledge that
Credentials-provider users may have application-managed passwords, and tell
operators to migrate those credentials separately or arrange password resets. Do
not claim that all users sign in only with OAuth or email links.

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Inline comments:
Review comments at @packages/cli-core/src/commands/migrate/export/authjs.ts:
- Around line 98-103: Update the table-candidate discovery loop so a candidate
with incompatible columns does not stop discovery; continue checking later
candidates and retain the first column error for the final failure if none
match. In the final error path, prefer that schema error over the last lookup
error while preserving the existing message format.

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• packages/cli-core/src/commands/migrate/sources/authjs.ts

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Inline comments:
Review comments at @packages/cli-core/src/commands/migrate/lib/db.test.ts:
- Around line 303-322: Add a test near the existing missing-column test in the
migration database tests that exercises the generic diagnostic via a non-Auth.js
platform, such as supabase. Assert the usage exit code, generic “missing a
column the export reads” guidance, and absence of connection-string advice.

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[wyattjoh]

Approving. A few non-blocking notes:

• Missing-column hint query fails on the Prisma schema it uses as its example (packages/cli-core/src/commands/migrate/lib/db.ts:380): The hint's example is a Prisma schema with @map("full_name") on name, but its query selects email_verified. A default Prisma Auth.js schema names that column emailVerified, and the table is "User", which Postgres requires to be quoted. A user who copies this query gets another column "email_verified" does not exist error. They need "emailVerified" AS email_verified so the authjs source can still map the column.

• MySQL 'no user table' error gets connection advice (packages/cli-core/src/commands/migrate/export/authjs.ts:111): On MySQL with no Auth.js table, the export throws No Auth.js user table found. Tried User, user, users. Table 'db.users' doesn't exist. isMissingTable here matches doesn't exist, but the table check in describeDbError (db.ts:388) only matches does not exist. The error falls through to the generic hint, "Check the connection string, that the server is running, and that it is reachable from here." That sends the user to the connection, which worked. Postgres and SQLite get the correct 'expected table was not found' hint.

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⚠️ Outside diff range comments (1)

🟡 Minor · Require parseable Auth.js verification timestamps. · authjs.ts:35-45

packages/cli-core/src/commands/migrate/sources/authjs.ts:35-45
🗄️ Data Integrity & Integration | 🟡 Minor | ⚡ Quick win

Require parseable Auth.js verification timestamps.

email_verified: "not-a-date" passes the JSON import path and reaches routeByVerification. The timestamp branch treats it as verified, then leaves the address in Clerk’s primary email field. This promotes a malformed source value to a verified email.

The Auth.js export contract represents valid dates as ISO strings and omits invalid dates. Require timestamp strings to parse before treating them as verified.

Suggested fix

-  return typeof value === "string" && !isNullish(value);
+  return (
+    typeof value === "string" &&
+    !isNullish(value) &&
+    !Number.isNaN(new Date(value).getTime())
+  );

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Review comment at @packages/cli-core/src/commands/migrate/sources/authjs.ts
around lines 35 - 45:
Update the timestamp verification logic used by routeByVerification so a value
is treated as verified only when it is a non-null string that parses as a valid
date. Keep the existing verification behavior for valid timestamps and route
malformed timestamps as unverified.

---

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Outside diff comments:
Review comments at @packages/cli-core/src/commands/migrate/sources/authjs.ts:
- Around line 35-45: Update the timestamp verification logic used by
routeByVerification so a value is treated as verified only when it is a non-null
string that parses as a valid date. Keep the existing verification behavior for
valid timestamps and route malformed timestamps as unverified.

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⚠️ Outside diff range comments (1)

🟡 Minor · Preserve numeric zero timestamps in the Auth.js export. · authjs.ts:144-150

packages/cli-core/src/commands/migrate/export/authjs.ts:144-150
🗄️ Data Integrity & Integration | 🟡 Minor | ⚡ Quick win

Preserve numeric zero timestamps in the Auth.js export.

SQLite and libsql can return an integer timestamp as the number 0. The timestamp contract treats non-null numbers as verified, but this truthiness check omits 0 from both the export and verification coverage.

Suggested fix

-    // A zero date is no verification.
-    const verified = row.email_verified ? exportValue(row.email_verified) : undefined;
+    // Preserve numeric zero: the Unix epoch is a real timestamp.
+    const verified =
+      row.email_verified || row.email_verified === 0
+        ? exportValue(row.email_verified)
+        : undefined;

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Review comment at @packages/cli-core/src/commands/migrate/export/authjs.ts
around lines 144 - 150:
Update the `verified` assignment in the Auth.js export to preserve numeric `0`
as a valid timestamp instead of dropping it through a truthiness check. Keep
nullish or otherwise absent values omitted, and retain the existing
`user.email_verified` assignment and `counts.emailVerified` increment behavior.

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Outside diff comments:
Review comments at @packages/cli-core/src/commands/migrate/export/authjs.ts:
- Around line 144-150: Update the `verified` assignment in the Auth.js export to
preserve numeric `0` as a valid timestamp instead of dropping it through a
truthiness check. Keep nullish or otherwise absent values omitted, and retain
the existing `user.email_verified` assignment and `counts.emailVerified`
increment behavior.

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[royanger]

@coderabbitai Re the outside-diff comment on export/authjs.ts:144-150 (keep a numeric zero timestamp as verified):

Leaving this as is, deliberately. 0 is the Unix epoch, and no app verified an address then. In integer-timestamp schemas it shows up as a default or a missing value, not a real verification. Exporting it as verified would make an address nobody proved usable for sign-in, so 0 stays unverified, as the comment there says.

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🧩 Analysis chain

🏁 Script executed:

#!/bin/bash
set -euo pipefail
fd -t f '^authjs\.ts$' packages/cli-core/src/commands/migrate
ast-grep outline packages/cli-core/src/commands/migrate/export/authjs.ts --items all
sed -n '100,170p' packages/cli-core/src/commands/migrate/export/authjs.ts

Length of output: 4002

---

@royanger Thanks for the clarification. I checked packages/cli-core/src/commands/migrate/export/authjs.ts. The code and comment deliberately treat numeric 0 as unverified.

My suggestion would turn that missing-value sentinel into a verification signal. I withdraw the finding. No change is needed.

---

✏️ Learnings added

Learnt from: royanger
URL: https://github.com/clerk/cli/pull/529

Timestamp: 2026-10-15T14:48:42.940Z
Learning: In clerk/cli, packages/cli-core/src/commands/migrate/export/authjs.ts deliberately treats a numeric email_verified value of 0 as unverified. For this exporter, zero represents a default or missing timestamp, not evidence of email verification. Do not suggest preserving numeric zero as a verified timestamp.

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