release: 0.111.0

[stainless-app]

Automated Release PR

0.111.0 (2026-09-21)

Features

• Publish restricted_route_unavailable and unknown proxy_error codes (64805ae)
• Support native prepared Adyen Sessions checkout (5f2df0a)

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Note

Medium Risk
Adds Adyen checkout preparation types and changes how unknown proxy errors are modeled, which affects payment integrations and telemetry consumers.

Overview
Release 0.111.0 bumps package version metadata and changelog; functional changes are in generated API types and docs.

Browser proxy telemetry expands BrowserProxyErrorEvent with codes origin_response_incomplete, restricted_route_unavailable, and unknown. Unrecognized X-Kernel-Proxy-Error header values are no longer dropped—they surface as code: unknown plus optional raw_code (sanitized header value).

AgentCard prepare_checkout adds adyen to AgentcardPreparedProcessor and updates checkout-context/preparation docs: terminology shifts from “tokenization” to “checkout,” Adyen uses production/sandbox like other PSPs, and guidance covers Sessions on Adyen hosts, device handoff/encryption, and that approvals are not capture evidence.

Risk: Medium — touches payment checkout typing and proxy error handling; changes are mostly additive for SDK consumers.

^{Reviewed by Cursor Bugbot for commit 07747cb. Bugbot is set up for automated code reviews on this repo. Configure here.}

[stainless-app]

🧪 Testing

To try out this version of the SDK:

pip install 'https://pkg.stainless.com/s/kernel-python/5f2df0a4170aa146eabb23f576195d1a06621925/kernel-0.110.0-py3-none-any.whl'

Expires at: Wed, 21 Oct 2026 16:02:50 GMT
Updated at: Mon, 21 Sep 2026 16:02:50 GMT