release: 0.53.0

[stainless-app]

Automated Release PR

0.53.0 (2026-05-12)

Full Changelog: v0.52.0...v0.53.0

Features

• Add 'switch' MFA option type for generic method-switcher links (b6c0d17)
• Add opt-in record_session flag to managed auth (5673b41)
• api: server-side search on GET /projects (81a050d)
• browser_pools: add start_url config (KERNEL-1217 PR 2) (b2c8f95)
• managed-auth: surface awaiting_external_action even when fallback actions exist (c1a9ba4)
• Scope name uniqueness to project for profiles, session_pools, extensions, credentials (be3c6bd)

Bug Fixes

• go: avoid panic when http.DefaultTransport is wrapped (15e7a88)

Chores

• avoid embedding reflect.Type for dead code elimination (c267709)
• redact api-key headers in debug logs (405d242)

---

This pull request is managed by Stainless's GitHub App.

The semver version number is based on included commit messages. Alternatively, you can manually set the version number in the title of this pull request.

For a better experience, it is recommended to use either rebase-merge or squash-merge when merging this pull request.

🔗 Stainless website
📚 Read the docs
🙋 Reach out for help or questions

---

Note

Medium Risk
Medium risk: updates request/response models and client behavior (default transport handling and debug logging redaction), which could subtly affect HTTP behavior and downstream integrations.

Overview
Updates the generated SDK to v0.53.0 (manifest/version/docs/changelog) and refreshes the OpenAPI spec inputs.

Extends managed auth to support record_session (per-connection default plus per-login override) and adds a new MFA option type switch; also updates flow field semantics to allow fallback actions during awaiting_external_action.

Adds query support to Projects.List for server-side name searching, and introduces start_url for browser session creation and browser pool warm-up/config (including exposing start_url in browser-related responses).

Hardens client internals by avoiding a panic when http.DefaultTransport isn’t a *http.Transport, redacting sensitive headers in option.WithDebugLog, and tweaking internal encoder/decoder cache keys to avoid embedding reflect.Type (better dead-code elimination).

^{Reviewed by Cursor Bugbot for commit c79e094. Bugbot is set up for automated code reviews on this repo. Configure here.}

[stainless-app]

🧪 Testing

To try out this version of the SDK:

Download and unzip: 'https://pkg.stainless.com/s/kernel-go/5673b41f0cc5d6233dbaf9875bc20b84b7cc7762/source.zip'. Run 'go mod edit -replace github.com/kernel/kernel-go-sdk=/path/to/unzipped_directory'.

Expires at: Thu, 11 Jun 2026 21:38:29 GMT
Updated at: Tue, 12 May 2026 21:38:29 GMT

[firetiger-agent]

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[stainless-app]

Release version edited manually

The Pull Request version has been manually set to 0.52.1 and will be used for the release.

If you instead want to use the version number 0.53.0 generated from conventional commits, just remove the label autorelease: custom version from this Pull Request.

[masnwilliams]

Closing to re-align version at 0.54.0 across all SDKs. Changes are preserved on the next branch.