release: 0.51.0

.release-please-manifest.json

@@ -1,3 +1,3 @@
 {
-  ".": "0.50.0"
+  ".": "0.51.0"
 }

.stats.yml

@@ -1,4 +1,4 @@
 configured_endpoints: 112
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/kernel%2Fkernel-686a9addd4f9356ca26ff3ff04e1a11466d77a412859829075566394922b715d.yml
-openapi_spec_hash: 7a9e9c2023400d44bcbfb87b7ec07708
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/kernel%2Fkernel-a674e3c4c0063942621d1b4e7f67b72f7e240c12dd88564fe16627618ba33dd6.yml
+openapi_spec_hash: 8b97c87f0dafe5fc5e5a7365f3687755
 config_hash: 08d55086449943a8fec212b870061a3f

CHANGELOG.md

@@ -1,5 +1,54 @@
 # Changelog
 
+## 0.51.0 (2026-04-25)
+
+Full Changelog: [v0.50.0...v0.51.0](https://github.com/kernel/kernel-python-sdk/compare/v0.50.0...v0.51.0)
+
+### Features
+
+* add browser-scoped session client ([7ca6887](https://github.com/kernel/kernel-python-sdk/commit/7ca68877e7011bb83862b7cc810a20d8254ea7dd))
+* Expire stuck IN_PROGRESS managed auth sessions via background worker ([7781a3b](https://github.com/kernel/kernel-python-sdk/commit/7781a3b4635ded02dea60adf85878f50f7b7fb27))
+* Expose browser_session_id on managed auth connection ([0ccb507](https://github.com/kernel/kernel-python-sdk/commit/0ccb50744032b4c31e0575fa7b06fb20503c8f55))
+* generate browser-scoped resource bindings ([53b17c8](https://github.com/kernel/kernel-python-sdk/commit/53b17c8241cc71261d1e96f5929cbd4f05b2064b))
+
+
+### Bug Fixes
+
+* address python browser routing ci follow-ups ([9690923](https://github.com/kernel/kernel-python-sdk/commit/9690923666cfe07de76267eee050d7743a8bad6f))
+* evict deleted browser routes ([a873a18](https://github.com/kernel/kernel-python-sdk/commit/a873a18eba3f36937dc177ab981372e395722f8b))
+* finish python browser routing cleanup ([694907a](https://github.com/kernel/kernel-python-sdk/commit/694907ab3419477e7058b85a7365ac4cce941105))
+* normalize browser route cache session IDs ([f4c247b](https://github.com/kernel/kernel-python-sdk/commit/f4c247b425680b54d0ce3c7738fb82313bca7918))
+* normalize python browser request string bodies ([3ce80e7](https://github.com/kernel/kernel-python-sdk/commit/3ce80e767d373b638ba1c2959bf18bf999629db0))
+* quiet generator-script pyright noise ([0bdf85e](https://github.com/kernel/kernel-python-sdk/commit/0bdf85e0c38d4813056b61599273e88c7a64713a))
+* reserve internal browser request query params ([b2c7aac](https://github.com/kernel/kernel-python-sdk/commit/b2c7aacac09a1bb7680cf493e9985438b169286c))
+* satisfy browser-scoped lint checks ([8e8dde2](https://github.com/kernel/kernel-python-sdk/commit/8e8dde241c8817944baaacd155fe196f200868e8))
+* satisfy generated browser-scoped type checks ([b410245](https://github.com/kernel/kernel-python-sdk/commit/b410245e1ad4bf8e29c17c59a5931654567b141f))
+* sniff browser pool route cache updates ([5328730](https://github.com/kernel/kernel-python-sdk/commit/532873072f0400029768d1b7cf54b9fb1428ada9))
+* type-check browser-scoped helpers ([cfff5b4](https://github.com/kernel/kernel-python-sdk/commit/cfff5b4c3635d327dd1ac0779d4e17e395efbec0))
+
+
+### Chores
+
+* fix browser-scoped test import order ([fc34859](https://github.com/kernel/kernel-python-sdk/commit/fc34859c4f60f84038b425d9930c512e58134dea))
+* **internal:** more robust bootstrap script ([6c9cdf3](https://github.com/kernel/kernel-python-sdk/commit/6c9cdf3ce828fab358c7e060f4e3313408cad257))
+* keep browser-scoped generator lint clean ([a80716b](https://github.com/kernel/kernel-python-sdk/commit/a80716b791bf1f707aa7869290c47caefb0d9e27))
+
+
+### Documentation
+
+* flesh out browser-scoped example ([ca5d188](https://github.com/kernel/kernel-python-sdk/commit/ca5d1884b590634df5623945e9585e0a66228ec3))
+
+
+### Refactors
+
+* clean up python browser routing diff ([622f844](https://github.com/kernel/kernel-python-sdk/commit/622f8448a8a32f00b41d6e4890bfaf0a9374bd3e))
+* drop browser-scoped wrapper clients ([dba503e](https://github.com/kernel/kernel-python-sdk/commit/dba503e832d54aa8d462d3d74b3027f8a9e865b6))
+* inline browser resource passthrough returns ([02a2f59](https://github.com/kernel/kernel-python-sdk/commit/02a2f595c7e76ae7f0cea2ec1e88075df3a25be1))
+* move python browser routing rollout to env ([0647d5c](https://github.com/kernel/kernel-python-sdk/commit/0647d5cab166e680bcb3436d1b502c3215492400))
+* rename browser routing subresources config ([3ae9dab](https://github.com/kernel/kernel-python-sdk/commit/3ae9dab6b841e6f1191cdde073e36696f97feb39))
+* simplify browser routing cache ([de0476f](https://github.com/kernel/kernel-python-sdk/commit/de0476fc043df48a58dd4067bb4b3c0fe7a83f0e))
+* sniff browser routes in response hooks ([563de7d](https://github.com/kernel/kernel-python-sdk/commit/563de7d0ac8f141320edb060b4671935808e473a))
+
 ## 0.50.0 (2026-04-20)
 
 Full Changelog: [v0.49.0...v0.50.0](https://github.com/kernel/kernel-python-sdk/compare/v0.49.0...v0.50.0)

examples/browser_routing.py

@@ -0,0 +1,25 @@
+"""Example: direct-to-VM browser routing for process exec and raw HTTP."""
+
+from typing import Any, cast
+
+import httpx
+
+from kernel import Kernel
+
+
+def main() -> None:
+    with Kernel() as client:
+        browsers = cast(Any, client.browsers)
+        browser = browsers.create(headless=True)
+        try:
+            response = cast(httpx.Response, browsers.request(browser.session_id, "GET", "https://example.com"))
+            print("status", response.status_code)
+
+            with browsers.stream(browser.session_id, "GET", "https://example.com") as streamed:
+                print("streamed-bytes", len(streamed.read()))
+        finally:
+            browsers.delete_by_id(browser.session_id)
+
+
+if __name__ == "__main__":
+    main()

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "kernel"
-version = "0.50.0"
+version = "0.51.0"
 description = "The official Python library for the kernel API"
 dynamic = ["readme"]
 license = "Apache-2.0"

scripts/bootstrap

@@ -4,7 +4,7 @@ set -e
 
 cd "$(dirname "$0")/.."
 
-if [ -f "Brewfile" ] && [ "$(uname -s)" = "Darwin" ] && [ "$SKIP_BREW" != "1" ] && [ -t 0 ]; then
+if [ -f "Brewfile" ] && [ "$(uname -s)" = "Darwin" ] && [ "${SKIP_BREW:-}" != "1" ] && [ -t 0 ]; then
   brew bundle check >/dev/null 2>&1 || {
     echo -n "==> Install Homebrew dependencies? (y/N): "
     read -r response

src/kernel/_client.py

@@ -3,7 +3,7 @@
 from __future__ import annotations
 
 import os
-from typing import TYPE_CHECKING, Any, Dict, Mapping, cast
+from typing import TYPE_CHECKING, Any, Dict, Type, Mapping, cast
 from typing_extensions import Self, Literal, override
 
 import httpx
@@ -14,13 +14,15 @@
     Omit,
     Timeout,
     NotGiven,
+    ResponseT,
     Transport,
     ProxiesTypes,
     RequestOptions,
     not_given,
 )
 from ._utils import is_given, get_async_library
 from ._compat import cached_property
+from ._models import FinalRequestOptions
 from ._version import __version__
 from ._streaming import Stream as Stream, AsyncStream as AsyncStream
 from ._exceptions import KernelError, APIStatusError
@@ -29,6 +31,15 @@
     SyncAPIClient,
     AsyncAPIClient,
 )
+from .lib.browser_routing.routing import (
+    BrowserRouteCache,
+    BrowserRoutingConfig,
+    strip_direct_vm_auth,
+    rewrite_direct_vm_options,
+    browser_routing_config_from_env,
+    maybe_evict_browser_route_from_response,
+    maybe_populate_browser_route_cache_from_response,
+)
 
 if TYPE_CHECKING:
     from .resources import (
@@ -79,8 +90,10 @@
 class Kernel(SyncAPIClient):
     # client options
     api_key: str
+    browser_route_cache: BrowserRouteCache
 
     _environment: Literal["production", "development"] | NotGiven
+    _browser_routing: BrowserRoutingConfig
 
     def __init__(
         self,
@@ -105,6 +118,7 @@ def __init__(
         # outlining your use-case to help us decide if it should be
         # part of our public interface in the future.
         _strict_response_validation: bool = False,
+        _browser_route_cache: BrowserRouteCache | None = None,
     ) -> None:
         """Construct a new synchronous Kernel client instance.
 
@@ -154,6 +168,8 @@ def __init__(
             custom_query=default_query,
             _strict_response_validation=_strict_response_validation,
         )
+        self.browser_route_cache = _browser_route_cache or BrowserRouteCache()
+        self._browser_routing = browser_routing_config_from_env()
 
     @cached_property
     def deployments(self) -> DeploymentsResource:
@@ -266,6 +282,37 @@ def default_headers(self) -> dict[str, str | Omit]:
             **self._custom_headers,
         }
 
+    @override
+    def _prepare_options(self, options: Any) -> Any:
+        options = cast(Any, super()._prepare_options(options))
+        return rewrite_direct_vm_options(options, cache=self.browser_route_cache, config=self._browser_routing)
+
+    @override
+    def _prepare_request(self, request: httpx.Request) -> None:
+        strip_direct_vm_auth(request, cache=self.browser_route_cache)
+
+    @override
+    def _process_response(
+        self,
+        *,
+        cast_to: Type[ResponseT],
+        options: FinalRequestOptions,
+        response: httpx.Response,
+        stream: bool,
+        stream_cls: type[Stream[Any]] | type[AsyncStream[Any]] | None,
+        retries_taken: int = 0,
+    ) -> ResponseT:
+        maybe_populate_browser_route_cache_from_response(response, cache=self.browser_route_cache)
+        maybe_evict_browser_route_from_response(response, cache=self.browser_route_cache)
+        return super()._process_response(
+            cast_to=cast_to,
+            options=options,
+            response=response,
+            stream=stream,
+            stream_cls=stream_cls,
+            retries_taken=retries_taken,
+        )
+
     def copy(
         self,
         *,
@@ -279,6 +326,7 @@ def copy(
         set_default_headers: Mapping[str, str] | None = None,
         default_query: Mapping[str, object] | None = None,
         set_default_query: Mapping[str, object] | None = None,
+        _browser_route_cache: BrowserRouteCache | None = None,
         _extra_kwargs: Mapping[str, Any] = {},
     ) -> Self:
         """
@@ -312,6 +360,7 @@ def copy(
             max_retries=max_retries if is_given(max_retries) else self.max_retries,
             default_headers=headers,
             default_query=params,
+            _browser_route_cache=_browser_route_cache or self.browser_route_cache,
             **_extra_kwargs,
         )
 
@@ -356,8 +405,10 @@ def _make_status_error(
 class AsyncKernel(AsyncAPIClient):
     # client options
     api_key: str
+    browser_route_cache: BrowserRouteCache
 
     _environment: Literal["production", "development"] | NotGiven
+    _browser_routing: BrowserRoutingConfig
 
     def __init__(
         self,
@@ -382,6 +433,7 @@ def __init__(
         # outlining your use-case to help us decide if it should be
         # part of our public interface in the future.
         _strict_response_validation: bool = False,
+        _browser_route_cache: BrowserRouteCache | None = None,
     ) -> None:
         """Construct a new async AsyncKernel client instance.
 
@@ -431,6 +483,8 @@ def __init__(
             custom_query=default_query,
             _strict_response_validation=_strict_response_validation,
         )
+        self.browser_route_cache = _browser_route_cache or BrowserRouteCache()
+        self._browser_routing = browser_routing_config_from_env()
 
     @cached_property
     def deployments(self) -> AsyncDeploymentsResource:
@@ -543,6 +597,37 @@ def default_headers(self) -> dict[str, str | Omit]:
             **self._custom_headers,
         }
 
+    @override
+    async def _prepare_options(self, options: Any) -> Any:
+        options = cast(Any, await super()._prepare_options(options))
+        return rewrite_direct_vm_options(options, cache=self.browser_route_cache, config=self._browser_routing)
+
+    @override
+    async def _prepare_request(self, request: httpx.Request) -> None:
+        strip_direct_vm_auth(request, cache=self.browser_route_cache)
+
+    @override
+    async def _process_response(
+        self,
+        *,
+        cast_to: Type[ResponseT],
+        options: FinalRequestOptions,
+        response: httpx.Response,
+        stream: bool,
+        stream_cls: type[Stream[Any]] | type[AsyncStream[Any]] | None,
+        retries_taken: int = 0,
+    ) -> ResponseT:
+        maybe_populate_browser_route_cache_from_response(response, cache=self.browser_route_cache)
+        maybe_evict_browser_route_from_response(response, cache=self.browser_route_cache)
+        return await super()._process_response(
+            cast_to=cast_to,
+            options=options,
+            response=response,
+            stream=stream,
+            stream_cls=stream_cls,
+            retries_taken=retries_taken,
+        )
+
     def copy(
         self,
         *,
@@ -556,6 +641,7 @@ def copy(
         set_default_headers: Mapping[str, str] | None = None,
         default_query: Mapping[str, object] | None = None,
         set_default_query: Mapping[str, object] | None = None,
+        _browser_route_cache: BrowserRouteCache | None = None,
         _extra_kwargs: Mapping[str, Any] = {},
     ) -> Self:
         """
@@ -589,6 +675,7 @@ def copy(
             max_retries=max_retries if is_given(max_retries) else self.max_retries,
             default_headers=headers,
             default_query=params,
+            _browser_route_cache=_browser_route_cache or self.browser_route_cache,
             **_extra_kwargs,
         )
 

src/kernel/_version.py

@@ -1,4 +1,4 @@
 # File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
 
 __title__ = "kernel"
-__version__ = "0.50.0"  # x-release-please-version
+__version__ = "0.51.0"  # x-release-please-version

src/kernel/lib/browser_routing/__init__.py

@@ -0,0 +1,3 @@
+from __future__ import annotations
+
+__all__: list[str] = []