diff --git a/.github/workflows/core-tip.yml b/.github/workflows/core-tip.yml
index c6d980b..ebe00b2 100644
--- a/.github/workflows/core-tip.yml
+++ b/.github/workflows/core-tip.yml
@@ -71,7 +71,7 @@ jobs:
         id: core-ref
         uses: ./collection/.github/actions/core-ref
         with:
-          fallback: 6e73c274d7b084c7c0b1842d4a7ae82316952b4a
+          fallback: ca0a49e42d9492d9a35bb45f78674ed4eb073a69
       - name: Check out the required Core revision
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
@@ -141,7 +141,7 @@ jobs:
         id: core-ref
         uses: ./collection/.github/actions/core-ref
         with:
-          fallback: 6e73c274d7b084c7c0b1842d4a7ae82316952b4a
+          fallback: ca0a49e42d9492d9a35bb45f78674ed4eb073a69
       - name: Check out the required Core revision
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
@@ -212,7 +212,7 @@ jobs:
         id: core-ref
         uses: ./collection/.github/actions/core-ref
         with:
-          fallback: 6e73c274d7b084c7c0b1842d4a7ae82316952b4a
+          fallback: ca0a49e42d9492d9a35bb45f78674ed4eb073a69
       - name: Check out Core with bounded population checks
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
@@ -768,7 +768,7 @@ jobs:
         id: core-ref
         uses: ./collection/.github/actions/core-ref
         with:
-          fallback: 6e73c274d7b084c7c0b1842d4a7ae82316952b4a
+          fallback: ca0a49e42d9492d9a35bb45f78674ed4eb073a69
       - name: Check out Core with the additive Transfer migration check
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
@@ -995,7 +995,7 @@ jobs:
         id: core-ref
         uses: ./collection/.github/actions/core-ref
         with:
-          fallback: 6e73c274d7b084c7c0b1842d4a7ae82316952b4a
+          fallback: ca0a49e42d9492d9a35bb45f78674ed4eb073a69
       - name: Check out Core with the movement Gate
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
@@ -1199,7 +1199,7 @@ jobs:
         id: core-ref
         uses: ./collection/.github/actions/core-ref
         with:
-          fallback: 6e73c274d7b084c7c0b1842d4a7ae82316952b4a
+          fallback: ca0a49e42d9492d9a35bb45f78674ed4eb073a69
       - name: Check out Core with recorded recovery deadlines
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
diff --git a/.github/workflows/playerbots-capacity.yml b/.github/workflows/playerbots-capacity.yml
index 5815025..619e4a0 100644
--- a/.github/workflows/playerbots-capacity.yml
+++ b/.github/workflows/playerbots-capacity.yml
@@ -42,7 +42,7 @@ jobs:
         id: core-ref
         uses: ./collection/.github/actions/core-ref
         with:
-          fallback: 6e73c274d7b084c7c0b1842d4a7ae82316952b4a
+          fallback: ca0a49e42d9492d9a35bb45f78674ed4eb073a69
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           repository: LyraCoreProject/LyraCore
diff --git a/.github/workflows/playerbots-class-behavior.yml b/.github/workflows/playerbots-class-behavior.yml
index e260a4b..01d3fb8 100644
--- a/.github/workflows/playerbots-class-behavior.yml
+++ b/.github/workflows/playerbots-class-behavior.yml
@@ -36,7 +36,7 @@ jobs:
         id: core-ref
         uses: ./collection/.github/actions/core-ref
         with:
-          fallback: 6e73c274d7b084c7c0b1842d4a7ae82316952b4a
+          fallback: ca0a49e42d9492d9a35bb45f78674ed4eb073a69
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           repository: LyraCoreProject/LyraCore
diff --git a/.github/workflows/playerbots-target-claims.yml b/.github/workflows/playerbots-target-claims.yml
index aea1b37..5248fa5 100644
--- a/.github/workflows/playerbots-target-claims.yml
+++ b/.github/workflows/playerbots-target-claims.yml
@@ -49,7 +49,7 @@ jobs:
         id: core-ref
         uses: ./collection/.github/actions/core-ref
         with:
-          fallback: 6e73c274d7b084c7c0b1842d4a7ae82316952b4a
+          fallback: ca0a49e42d9492d9a35bb45f78674ed4eb073a69
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           repository: LyraCoreProject/LyraCore
diff --git a/README.md b/README.md
index 42be4a2..283f132 100644
--- a/README.md
+++ b/README.md
@@ -3,9 +3,9 @@
 This repository is LyraCore's Official Package Collection. Each visible top-level directory is one
 independently installable Package. There is no separate registry or index file.
 
-This collection requires Package API version 3. Rust Packages use `actor`, `hooks`, `package`,
-`tables`, and `script_binding`. Core checkouts on version 2 can use `api-v2`. Each Package API version has
-a tag, such as `api-v3`. After the compatibility checks pass on `main`, CI moves the tag for the
+This collection requires Package API version 4. Rust Packages use `actor`, `hooks`, `package`,
+`tables`, and `script_binding`. Core checkouts on version 3 can use `api-v3`. Each Package API version has
+a tag, such as `api-v4`. After the compatibility checks pass on `main`, CI moves the tag for the
 checked Core revision's Package API version to that collection commit. Tags for older API versions stay at their last compatible commit.
 
 `lyracore packages add <name>` and `lyracore packages update` select the tag from the version in