feat(shared): Add oiat field to JwtHeader type

[nikosdouvlis]

Why

Session Minter uses oiat (original_issued_at) in the JWT header to track when token claims were last assembled from the DB. Edge re-mints copy this value forward, so consumers can determine claim freshness regardless of how many times the token was re-signed at the edge.

What

Add oiat?: number to the JwtHeader interface in jwtv2.ts. Marked @internal.

Test plan

• Type-only change, no runtime behavior
• Existing JWT parsing still works (oiat passes through via JSON.parse)

Summary by CodeRabbit

• Chores
  • Internal improvements to JWT token handling infrastructure to support enhanced token management capabilities.

[changeset-bot]

🦋 Changeset detected

Latest commit: ee6914d

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

This PR includes changesets to release 21 packages

Name	Type
@clerk/shared	Patch
@clerk/agent-toolkit	Patch
@clerk/astro	Patch
@clerk/backend	Patch
@clerk/chrome-extension	Patch
@clerk/clerk-js	Patch
@clerk/expo-passkeys	Patch
@clerk/expo	Patch
@clerk/express	Patch
@clerk/fastify	Patch
@clerk/hono	Patch
@clerk/localizations	Patch
@clerk/msw	Patch
@clerk/nextjs	Patch
@clerk/nuxt	Patch
@clerk/react-router	Patch
@clerk/react	Patch
@clerk/tanstack-react-start	Patch
@clerk/testing	Patch
@clerk/ui	Patch
@clerk/vue	Patch

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Project	Deployment	Actions	Updated (UTC)
clerk-js-sandbox	Ready	Preview, Comment	Apr 3, 2026 0:58am

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commit: ee6914d

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📥 Commits

Reviewing files that changed from the base of the PR and between abfd5ef and ee6914d.

📒 Files selected for processing (2)

• .changeset/session-minter-oiat-type.md
• packages/shared/src/types/jwtv2.ts

---

📝 Walkthrough

Walkthrough

This pull request adds a changeset entry for the @clerk/shared package indicating a patch-level release. The JwtHeader interface in packages/shared/src/types/jwtv2.ts is extended with a new optional field oiat?: number. The field, documented as @internal, represents the original\_issued\_at timestamp and is intended for Session Minter monotonic token freshness checks. External dependencies on this field are discouraged.

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'feat(shared): Add oiat field to JwtHeader type' directly and clearly summarizes the main change in the pull request, which is adding the oiat field to the JwtHeader type.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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