diff --git a/.github/workflows/build_test.yml b/.github/workflows/build_test.yml
index 8ba384af6..8d62f4bcb 100644
--- a/.github/workflows/build_test.yml
+++ b/.github/workflows/build_test.yml
@@ -19,9 +19,6 @@ on:
 jobs:
   build-and-test:
     runs-on: ubuntu-latest
-    permissions:
-      contents: read
-      packages: write
 
     strategy:
       fail-fast: false
@@ -39,17 +36,18 @@ jobs:
           stable,
         ]
 
+    services:
+      registry:
+        image: registry:2
+        ports:
+          - 5000:5000
+
     steps:
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
-
-      - name: Log in to the Container registry
-        uses: docker/login-action@v3
         with:
-          registry: ghcr.io
-          username: ${{ github.repository_owner }}
-          password: ${{ secrets.GITHUB_TOKEN }}
+          driver-opts: network=host
 
       - name: Checkout Cycamore
         uses: actions/checkout@v4
@@ -60,9 +58,8 @@ jobs:
         uses: docker/build-push-action@v5
         with:
           file: docker/Dockerfile
-          cache-from: type=registry,ref=ghcr.io/${{ github.repository_owner }}/cycamore_${{ matrix.ubuntu_versions }}_${{ matrix.pkg_mgr }}/cycamore:ci-layer-cache
-          cache-to: type=registry,ref=ghcr.io/${{ github.repository_owner }}/cycamore_${{ matrix.ubuntu_versions }}_${{ matrix.pkg_mgr }}/cycamore:ci-layer-cache,mode=max
-          tags: ghcr.io/${{ github.repository_owner }}/cycamore_${{ matrix.ubuntu_versions }}_${{ matrix.pkg_mgr }}/cycamore:ci-image-cache
+          cache-from: type=registry,ref=ghcr.io/cyclus/cycamore_${{ matrix.ubuntu_versions }}_${{ matrix.pkg_mgr }}/cycamore:ci-layer-cache
+          tags: localhost:5000/cycamore:local
           push: true
           build-args: |
             pkg_mgr=${{ matrix.pkg_mgr }}
@@ -84,14 +81,12 @@ jobs:
         with:
           context: ${{ github.workspace }}/cymetric
           file: ${{ github.workspace }}/cymetric/docker/Dockerfile
-          cache-from: type=registry,ref=ghcr.io/${{ github.repository_owner }}/cymetric_${{ matrix.ubuntu_versions }}_${{ matrix.pkg_mgr }}/cymetric:ci-layer-cache
-          cache-to: type=registry,ref=ghcr.io/${{ github.repository_owner }}/cymetric_${{ matrix.ubuntu_versions }}_${{ matrix.pkg_mgr }}/cymetric:ci-layer-cache,mode=max
+          build-contexts: |
+            ghcr.io/cyclus/cycamore_${{ matrix.ubuntu_versions }}_${{ matrix.pkg_mgr }}/cycamore=docker-image://localhost:5000/cycamore:local
+          cache-from: type=registry,ref=ghcr.io/cyclus/cymetric_${{ matrix.ubuntu_versions }}_${{ matrix.pkg_mgr }}/cymetric:ci-layer-cache
           build-args: |
             pkg_mgr=${{ matrix.pkg_mgr }}
             ubuntu_version=${{ matrix.ubuntu_versions }}
-            cycamore_tag=ci-image-cache
-          build-contexts: |
-            ghcr.io/cyclus/cycamore_${{ matrix.ubuntu_versions }}_${{ matrix.pkg_mgr }}/cycamore:ci-image-cache=docker-image://ghcr.io/${{ github.repository_owner }}/cycamore_${{ matrix.ubuntu_versions }}_${{ matrix.pkg_mgr }}/cycamore:ci-image-cache@${{ steps.build-cycamore.outputs.digest }}
 
       - name: Export Environment Variables
         if: github.event_name == 'pull_request'
diff --git a/.github/workflows/publish_latest.yml b/.github/workflows/publish_latest.yml
index 5512371fe..5e6eb44ff 100644
--- a/.github/workflows/publish_latest.yml
+++ b/.github/workflows/publish_latest.yml
@@ -49,18 +49,18 @@ jobs:
         uses: docker/login-action@v3
         with:
           registry: ghcr.io
-          username: ${{ github.repository_owner }}
+          username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Build and Test Cycamore
         id: build-cycamore
         uses: docker/build-push-action@v5
         with:
-          cache-from: type=registry,ref=ghcr.io/${{ github.repository_owner }}/cycamore_${{ matrix.ubuntu_versions }}_${{ matrix.pkg_mgr }}/cycamore:ci-layer-cache
-          cache-to: type=registry,ref=ghcr.io/${{ github.repository_owner }}/cycamore_${{ matrix.ubuntu_versions }}_${{ matrix.pkg_mgr }}/cycamore:ci-layer-cache,mode=max
+          cache-from: type=registry,ref=ghcr.io/cyclus/cycamore_${{ matrix.ubuntu_versions }}_${{ matrix.pkg_mgr }}/cycamore:ci-layer-cache
+          cache-to: type=registry,ref=ghcr.io/cyclus/cycamore_${{ matrix.ubuntu_versions }}_${{ matrix.pkg_mgr }}/cycamore:ci-layer-cache,mode=max
           file: docker/Dockerfile
           push: true
-          tags: ghcr.io/${{ github.repository_owner }}/cycamore_${{ matrix.ubuntu_versions }}_${{ matrix.pkg_mgr }}/cycamore:${{ env.tag }}
+          tags: ghcr.io/cyclus/cycamore_${{ matrix.ubuntu_versions }}_${{ matrix.pkg_mgr }}/cycamore:${{ env.tag }}
           build-args: |
             pkg_mgr=${{ matrix.pkg_mgr }}
             ubuntu_version=${{ matrix.ubuntu_versions }}
@@ -78,9 +78,9 @@ jobs:
         with:
           context: ${{ github.workspace }}/cymetric
           file: ${{ github.workspace }}/cymetric/docker/Dockerfile
-          cache-from: type=registry,ref=ghcr.io/${{ github.repository_owner }}/cymetric_${{ matrix.ubuntu_versions }}_${{ matrix.pkg_mgr }}/cymetric:ci-layer-cache
-          cache-to: type=registry,ref=ghcr.io/${{ github.repository_owner }}/cymetric_${{ matrix.ubuntu_versions }}_${{ matrix.pkg_mgr }}/cymetric:ci-layer-cache,mode=max
-          tags: ghcr.io/${{ github.repository_owner }}/cymetric_${{ matrix.ubuntu_versions }}_${{ matrix.pkg_mgr }}/cymetric:${{ env.tag }}
+          cache-from: type=registry,ref=ghcr.io/cyclus/cymetric_${{ matrix.ubuntu_versions }}_${{ matrix.pkg_mgr }}/cymetric:ci-layer-cache
+          cache-to: type=registry,ref=ghcr.io/cyclus/cymetric_${{ matrix.ubuntu_versions }}_${{ matrix.pkg_mgr }}/cymetric:ci-layer-cache,mode=max
+          tags: ghcr.io/cyclus/cymetric_${{ matrix.ubuntu_versions }}_${{ matrix.pkg_mgr }}/cymetric:${{ env.tag }}
           push: true
           build-args: |
             pkg_mgr=${{ matrix.pkg_mgr }}
diff --git a/.github/workflows/publish_release.yml b/.github/workflows/publish_release.yml
index 2987e3456..aedb83bc7 100644
--- a/.github/workflows/publish_release.yml
+++ b/.github/workflows/publish_release.yml
@@ -1,6 +1,9 @@
 name: Publish Stable Cycamore
 
 on:
+  pull_request:
+    paths:
+      - '.github/workflows/publish_release.yml'
   release:
     types: [released]
 
@@ -31,7 +34,7 @@ jobs:
           echo "stable_tag=ci-image-cache" >> "$GITHUB_ENV"
 
       - name: Tag as stable
-        if: ${{ github.repository_owner == 'cyclus' }}
+        if: ${{ github.repository_owner == 'cyclus' && github.event_name == 'release' }}
         run: |
           echo "version_tag=${{ github.event.release.tag_name }}" >> "$GITHUB_ENV"
           echo "stable_tag=stable" >> "$GITHUB_ENV"
@@ -40,7 +43,7 @@ jobs:
         uses: docker/login-action@v3
         with:
           registry: ghcr.io
-          username: ${{ github.repository_owner }}
+          username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Set up Docker Buildx
@@ -52,13 +55,12 @@ jobs:
       - name: Build, Test, and Push Cycamore
         uses: docker/build-push-action@v5
         with:
-          cache-from: type=registry,ref=ghcr.io/${{ github.repository_owner }}/cycamore_${{ matrix.ubuntu_versions }}_${{ matrix.pkg_mgr }}/cycamore:ci-layer-cache
-          cache-to: type=registry,ref=ghcr.io/${{ github.repository_owner }}/cycamore_${{ matrix.ubuntu_versions }}_${{ matrix.pkg_mgr }}/cycamore:ci-layer-cache,mode=max
+          cache-from: type=registry,ref=ghcr.io/cyclus/cycamore_${{ matrix.ubuntu_versions }}_${{ matrix.pkg_mgr }}/cycamore:ci-layer-cache
           file: docker/Dockerfile
           push: true
           tags: |
-            ghcr.io/${{ github.repository_owner }}/cycamore_${{ matrix.ubuntu_versions }}_${{ matrix.pkg_mgr }}/cycamore:${{ env.version_tag }}
-            ghcr.io/${{ github.repository_owner }}/cycamore_${{ matrix.ubuntu_versions }}_${{ matrix.pkg_mgr }}/cycamore:${{ env.stable_tag }}
+            ghcr.io/cyclus/cycamore_${{ matrix.ubuntu_versions }}_${{ matrix.pkg_mgr }}/cycamore:${{ env.version_tag }}
+            ghcr.io/cyclus/cycamore_${{ matrix.ubuntu_versions }}_${{ matrix.pkg_mgr }}/cycamore:${{ env.stable_tag }}
           build-args: |
             pkg_mgr=${{ matrix.pkg_mgr }}
             ubuntu_version=${{ matrix.ubuntu_versions }}
diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 8f64868cf..ae94b0ce9 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -5,9 +5,9 @@ cycamore Change Log
 .. current developments
 **Added:**
 
-* Downstream testing in CI workflows (#573, #580, #582)
-* GitHub workflow for publishing images on release (#573, #582)
-* GitHub workflows for building/testing on a PR and push to `main` (#549, #564, #573, #582)
+* Downstream testing in CI workflows (#573, #580, #582, #583)
+* GitHub workflow for publishing images on release (#573, #582, #583)
+* GitHub workflows for building/testing on a PR and push to `main` (#549, #564, #573, #582, #583)
 * Add functionality for random behavior on the size (#550) and frequency (#565) of a sink 
 * GitHub workflow to check that the CHANGELOG has been updated (#562) 
 * Added inventory policies to Storage through the material buy policy (#574)
diff --git a/docker/Dockerfile b/docker/Dockerfile
index 8682a7c59..fb08841ad 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,6 +1,6 @@
 ARG pkg_mgr=apt
 ARG ubuntu_version=22.04
-ARG cyclus_tag=stable
+ARG cyclus_tag=latest
 
 FROM ghcr.io/cyclus/cyclus_${ubuntu_version}_${pkg_mgr}/cyclus:${cyclus_tag} as cycamore
 ARG make_cores=2