diff --git a/projects/packages/calypsoify/README.md b/projects/packages/calypsoify/README.md
index 7b62073e0d934..6ced433691d4f 100644
--- a/projects/packages/calypsoify/README.md
+++ b/projects/packages/calypsoify/README.md
@@ -2,6 +2,9 @@
 
 Calypsoify is designed to make sure specific wp-admin pages include navigation that prioritizes the Calypso navigation experience.
 
+> [!CAUTION]
+> This package is abandoned. Its features are now part of the block editor for everyone.
+
 ![](https://cldup.com/awmrHOWz7t.png)
 
 ## How to install Calypsoify
diff --git a/projects/packages/calypsoify/changelog/update-abandon-calypsoify-45356 b/projects/packages/calypsoify/changelog/update-abandon-calypsoify-45356
new file mode 100644
index 0000000000000..f8be22b96a785
--- /dev/null
+++ b/projects/packages/calypsoify/changelog/update-abandon-calypsoify-45356
@@ -0,0 +1,4 @@
+Significance: minor
+Type: changed
+
+Mark package as abandoned.
diff --git a/projects/packages/calypsoify/composer.json b/projects/packages/calypsoify/composer.json
index d621958edf07f..8a578485691ca 100644
--- a/projects/packages/calypsoify/composer.json
+++ b/projects/packages/calypsoify/composer.json
@@ -62,5 +62,6 @@
 	},
 	"suggest": {
 		"automattic/jetpack-autoloader": "Allow for better interoperability with other plugins that use this package."
-	}
+	},
+	"abandoned": true
 }
diff --git a/projects/plugins/mu-wpcom-plugin/changelog/update-abandon-calypsoify-45356 b/projects/plugins/mu-wpcom-plugin/changelog/update-abandon-calypsoify-45356
new file mode 100644
index 0000000000000..47f5577b92146
--- /dev/null
+++ b/projects/plugins/mu-wpcom-plugin/changelog/update-abandon-calypsoify-45356
@@ -0,0 +1,5 @@
+Significance: patch
+Type: changed
+Comment: Update composer.lock.
+
+
diff --git a/projects/plugins/mu-wpcom-plugin/composer.lock b/projects/plugins/mu-wpcom-plugin/composer.lock
index b1eb916f4aa14..8a117901c3cff 100644
--- a/projects/plugins/mu-wpcom-plugin/composer.lock
+++ b/projects/plugins/mu-wpcom-plugin/composer.lock
@@ -393,7 +393,7 @@
             "dist": {
                 "type": "path",
                 "url": "../../packages/calypsoify",
-                "reference": "1e57eb50b5a1d78b81fd8e4241073d1f9ed56142"
+                "reference": "5f052281a3effc4251b834f23178864d9555e1be"
             },
             "require": {
                 "automattic/jetpack-assets": "@dev",
@@ -449,6 +449,7 @@
                 "GPL-2.0-or-later"
             ],
             "description": "Calypsoify is designed to make sure specific wp-admin pages include navigation that prioritizes the Calypso navigation experience.",
+            "abandoned": true,
             "transport-options": {
                 "relative": true
             }
diff --git a/projects/plugins/wpcomsh/changelog/update-abandon-calypsoify-45356 b/projects/plugins/wpcomsh/changelog/update-abandon-calypsoify-45356
new file mode 100644
index 0000000000000..47f5577b92146
--- /dev/null
+++ b/projects/plugins/wpcomsh/changelog/update-abandon-calypsoify-45356
@@ -0,0 +1,5 @@
+Significance: patch
+Type: changed
+Comment: Update composer.lock.
+
+
diff --git a/projects/plugins/wpcomsh/composer.lock b/projects/plugins/wpcomsh/composer.lock
index 58a19289006fb..a404d41b102f9 100644
--- a/projects/plugins/wpcomsh/composer.lock
+++ b/projects/plugins/wpcomsh/composer.lock
@@ -530,7 +530,7 @@
             "dist": {
                 "type": "path",
                 "url": "../../packages/calypsoify",
-                "reference": "1e57eb50b5a1d78b81fd8e4241073d1f9ed56142"
+                "reference": "5f052281a3effc4251b834f23178864d9555e1be"
             },
             "require": {
                 "automattic/jetpack-assets": "@dev",
@@ -586,6 +586,7 @@
                 "GPL-2.0-or-later"
             ],
             "description": "Calypsoify is designed to make sure specific wp-admin pages include navigation that prioritizes the Calypso navigation experience.",
+            "abandoned": true,
             "transport-options": {
                 "relative": true
             }