release: 0.42.1

[stainless-app]

Automated Release PR

0.42.1 (2026-03-05)

Full Changelog: v0.42.0...v0.42.1

Features

• [kernel-1028] add api clipboard support (12e68a1)
• add force flag to viewport resize to bypass live view/recording check (d387238)
• expose smooth mouse movement via public API (0e0f2ac)

Bug Fixes

• use indices:dots arrayFmt in MarshalRoot for correct multipart array encoding (11a7720)

Chores

• internal: codegen related update (3c706a4)

---

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
Introduces new/changed SDK request/response types for browser control (BrowserUpdateParamsViewport, smooth mouse params, clipboard endpoints), which may affect callers at compile time and change runtime behavior when resizing viewports. CI also gains an artifact upload step using OIDC, which could impact build reliability if the upload script or dependencies fail.

Overview
Bumps the SDK to v0.42.1 and updates release metadata/docs (CHANGELOG.md, README.md, internal/version.go, .stats.yml, api.md).

Adds browser-computer clipboard support via new ReadClipboard/WriteClipboard methods and request/response types, and extends mouse movement params with optional smooth/duration_ms controls.

Updates Browsers.Update viewport handling to accept a new viewport wrapper (BrowserUpdateParamsViewport) that includes a force flag to allow resizing even during live view/recording.

CI gains a build job that packages Go sources and uploads the artifact to Stainless storage using a GitHub OIDC token (scripts/utils/upload-artifact.sh).

^{Written by Cursor Bugbot for commit a7b55bc. This will update automatically on new commits. Configure here.}

[stainless-app]

🧪 Testing

To try out this version of the SDK:

Download and unzip: 'https://pkg.stainless.com/s/kernel-go/d387238e5da1f24f8b54a4be84d484da90fe1226/source.zip'. Run 'go mod edit -replace github.com/kernel/kernel-go-sdk=/path/to/unzipped_directory'.

Expires at: Sat, 04 Apr 2026 15:43:28 GMT
Updated at: Thu, 05 Mar 2026 15:43:28 GMT

[stainless-app]

Release version edited manually

The Pull Request version has been manually set to 0.42.1 and will be used for the release.

If you instead want to use the version number 0.43.0 generated from conventional commits, just remove the label autorelease: custom version from this Pull Request.

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

^{Bugbot Autofix is OFF. To automatically fix reported issues with cloud agents, enable autofix in the Cursor dashboard.}

[cursor]

Missing UnmarshalJSON silently drops Force field

Medium Severity

BrowserUpdateParamsViewport lacks its own UnmarshalJSON method, unlike every other param type in the codebase. Because it embeds shared.BrowserViewportParam which has an UnmarshalJSON, Go promotes that method. The promoted method's receiver is *BrowserViewportParam, so apijson.UnmarshalRoot only sees Height, Width, RefreshRate — the Force field is silently dropped during any JSON deserialization (e.g., when BrowserUpdateParams.UnmarshalJSON deserializes nested viewport data, or when using param.Override).

 

[stainless-app]

🤖 Release is at https://github.com/kernel/kernel-go-sdk/releases/tag/v0.42.1 🌻