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+# Jasmine Core 6.0.0-alpha.0 Release Notes
+
+This is a pre-release, intended to offer a preview of breaking 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.0`,
+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.0`.
+
+## Changes to supported environments
+
+* Node 18 is no longer supported.
+
+## Breaking changes
+
+### General
+
+* Private APIs have been removed from the `jasmine` namespace.
+
+  The purpose of this change is to reduce the risk of users inadvertently
+  depending on private APIs. Anything that's not covered by
+  [the documentation](https://jasmine.github.io/pages/docs_home.html) remains
+  private regardless of namespacing. Private APIs may be changed or removed in
+  any release. This change is being made in a major release as a courtesy to users of 
+  libraries that depend on private APIs.
+  
+* Arguments to `setSpecProperty`/`setSuiteProperty` must be both 
+  structured-cloneable and JSON-serializable.
+* Mock clock timing functions cannot be spied on. Previously this "worked" but
+  prevented the mock clock from uninstalling itself.
+* The default value of the `forbidDuplicateNames` config option has been 
+  changed to true.
+* The mock clock no longer supports the eval forms of `setTimeout` and 
+  `setInterval`.
+* If an execution order is passed to `Env#execute`, it must not enter any suite
+  more than once.
+* The argument passed to spec filters is a
+  [spec metadata](https://jasmine.github.io/api/6.0.0-alpha.0/Spec.html)
+  instance, not the internal spec object.
+
+### Changes that affect reporters
+
+This release includes changes that are intended to streamline and clarify the
+reporter interface, prevent sharing of mutable state, and prevent bugs involving
+non-serializable objects. These changes should be compatible with most existing
+reporters but could break reporters that manage their internal state in unusual
+ways. Please [open an issue](https://github.com/jasmine/jasmine/issues/new?template=bug_report.yml)
+if you find a published reporter package that works with jasmine-core 5.x but
+not with this release.
+
+* Irrelevant properties such as `status` and `failedExpectations` are omitted
+  from [the event passed to specStarted](https://jasmine.github.io/api/6.0.0-alpha.0/global.html#SpecStartedEvent).
+* Reporter events are deep-cloned before being passed to each reporter. This
+  protects reporters against later mutation by jasmine-core or other reporters.
+* The `expected` and `actual` properties of
+  [passed and failed expectations](https://jasmine.github.io/api/6.0.0-alpha.0/global.html#ExpectationResult)
+  have been removed.
+* The [order](https://jasmine.github.io/api/6.0.0-alpha.0/global.html#Order)
+  property of the`jasmineStarted` and `jasmineDone` reporter events no longer
+  includes undocumented properties.
+
+### Changes to Node boot functions
+
+* [boot](https://jasmine.github.io/api/6.0.0-alpha.0/module-jasmine-core.html#.boot)
+  defaults to creating a new core instance each time it's called. This restores
+  the pre-5.0 default behavior.
+* [noGlobals](https://jasmine.github.io/api/6.0.0-alpha.0/module-jasmine-core.html#.noGlobals)
+  no longer takes a parameter. It always returns the same object when called
+  repeatedly.
+
+## Supported environments
+
+This version has been tested in the following environments.
+
+| Environment       | Supported versions             |
+|-------------------|--------------------------------|
+| Node              | 20, 22, 24                     |
+| Safari            | 16**, 17**                     |
+| Chrome            | 140*                           |
+| Firefox           | 102**, 115**, 128**, 140, 143* |
+| Edge              | 140*                           |
+
+\* 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)_