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+# Jasmine Core 6.0.0-alpha.2 Release Notes
+
+This is a pre-release, intended to offer a preview of upcoming changes and to
+solicit feedback.
+
+## A Note About Pre-Release Compatibility
+
+There may be additional breaking changes in future 6.0 pre-releases or in the
+final 6.0 release. That's allowed by the semver specification, but users are
+sometimes unpleasantly surprised by it.
+
+NPM's implementation of carat version ranges assumes that subsequent
+pre-releases and final releases are fully compatible with earlier pre-releases.
+If your package.json contains `"jasmine-core": "^6.0.0-alpha.2`,
+NPM might install any later 6.x version even though there is no guarantee of
+compatibility. If that isn't ok, you should specify an exact pre-release version:
+`"jasmine-core": "6.0.0-alpha.2`.
+
+
+## Changes to supported environments
+
+Safari 26 is now supported on a best-effort basis.†
+
+Due to the limited availability of Safari 18 and later on free CI services,
+Safari support in future jasmine-core versions will be limited to:
+
+* Best-effort support for the latest Safari version available on GitHub Actions,
+  which may change at any time.
+* Best-effort support for Safari 16 and 17 for as long as it remains practical.
+
+## Bug Fixes
+
+* Fix custom matchers in top-level specs††
+  * Merges [#2088](https://github.com/jasmine/jasmine/pull/2088) from @bonkevin
+
+## New features
+
+* Larger body font size in HTML reporters
+* New Performance tab in HtmlReporterV2 shows metrics and a list of the slowest 
+  specs.
+* Experimental `safariYieldStrategy: "time"` config option, which may make
+  Jasmine run significantly faster in Safari and similar browsers. So far, this 
+  option has not been tested on a wide variety of workloads. Feedback is
+  appreciated.
+* New `extraItStackFrames` and `extraDescribeStackFrames` config options to fix
+  the filename properties of reporter events in configurations that wrap
+  `it`/`describe`, such as zone.js.†
+* `jasmine.allOf asymmetric` equality tester†
+  * Merges [#2087](https://github.com/jasmine/jasmine/pull/2087) from @jonahd-g
+  * Fixes [#2083](https://github.com/jasmine/jasmine/issues/2083)
+* Re-add support for partial spec name filtering via `spec` query parameter
+  * Fixes [#2085](https://github.com/jasmine/jasmine/issues/2085).
+* Require spec/suite property keys to be strings, not just anything that's 
+  cloneable and serializable. This matches the existing API reference
+  documentation.
+
+## Documentation improvements
+
+* Fix HtmlReporterV2 ctor example
+
+## Internal Improvements
+
+* Remove code to support browsers that don't have MessageChannel. Jasmine hasn't
+  run in any such browsers since 2.x.
+
+† Also likely to be included in a future 5.x release.<br>
+†† Also released in 5.12.1.
+
+## Supported environments
+
+This version has been tested in the following environments.
+
+| Environment       | Supported versions             |
+|-------------------|--------------------------------|
+| Node              | 20, 22, 24                     |
+| Safari            | 16**, 17**, 26**               |
+| Chrome            | 142*                           |
+| Firefox           | 102**, 115**, 128**, 140, 145* |
+| Edge              | 142*                           |
+
+\* Evergreen browser. Each version of Jasmine is tested against the latest
+version available at release time.<br>
+\** Supported on a best-effort basis. Support for these versions may be dropped
+if it becomes impractical, and bugs affecting only these versions may not be
+treated as release blockers.
+
+
+------
+
+_Release Notes generated with _[Anchorman](http://github.com/infews/anchorman)_