Arcade engine 2.0.0 breaking change note (#353)

* Arcade engine 2.0.0 breaking change note

* grammar

* Update pages/home/changelog.mdx

Co-authored-by: Nate Barbettini <[email protected]>

* Update pages/home/changelog.mdx

Co-authored-by: Nate Barbettini <[email protected]>

* add cahngelog

---------

Co-authored-by: Nate Barbettini <[email protected]>

Author: evantahler

pages/home/changelog.mdx

@@ -7,6 +7,39 @@ description: "What's new at Arcade.dev"
 
 *Here's what's new at Arcade.dev!*
 
+## For the week ending on 2025-07-18
+
+<Note>
+  Version 2.0.0 of the Arcade Engine was released this week.  Upgrading to version 2.0.0 is recommended for all self-hosted developers, and includes an important security fix for [secure OAuth flows](/home/auth/secure-auth-production).  After upgrading, all projects will default to using the Arcade user verifier.  If desired, you can then implement a custom user verifier in your application/agent and make the switch via the Arcade Dashboard.
+
+  Self-hosed Arcade developers cannot be grandfathered into the old (insecure) behavior of skipping user verification once the Engine is upgraded to version 2.0.0 or higher.
+</Note>
+
+**Frameworks**
+
+**Toolkits**
+* `[feature - 🚀]` Add Linear Toolkit ([PR #465](https://github.com/ArcadeAI/arcade-ai/pull/465))
+* `[feature - 🚀]` Add Zendesk Toolkit ([PR #458](https://github.com/ArcadeAI/arcade-ai/pull/458))
+* `[bugfix - 🐛]` Fix bug in Slack user processing ([PR #488](https://github.com/ArcadeAI/arcade-ai/pull/488))
+* `[bugfix - 🐛]` fix URL expansion in Twitter ([PR #500](https://github.com/ArcadeAI/arcade-ai/pull/500))
+
+**CLI and TDK**
+* `[feature - 🚀]` Toolkit docs generator command for Arcade CLI ([PR #414](https://github.com/ArcadeAI/arcade-ai/pull/414))
+* `[feature - 🚀]` custom `callback_host` for arcade login ([PR #481](https://github.com/ArcadeAI/arcade-ai/pull/481))
+
+**Platform and Engine**
+* `[feature - 🚀]` Dashboard: Add filter for user id and providers in Connected Accounts
+* `[feature - 🚀]` Add new endpoint for upcoming scheduled subs
+* `[bugfix - 🐛]` Engine OAuth hardening: secure defaults, config updates, validation, additional API flags, and route for user confirmation
+* `[feature - 🚀]` Dashboard: UI for security settings
+* `[bugfix - 🐛]` Engine: Correctly handle nils in auth provider responses
+* `[bugfix - 🐛]` Platform: Improved success & error pages for OAuth
+
+**Misc**
+* `[documentation - 📝]` replaced creating toolkit video with full tutorial ([PR #349](https://github.com/ArcadeAI/docs/pull/349))
+* `[documentation - 📝]` Add secure/brand auth in production doc ([PR #341](https://github.com/ArcadeAI/docs/pull/341))
+
+
 ## For the week ending on 2025-07-11
 
 **Frameworks**