diff --git a/.github/workflows/publish-images.yml b/.github/workflows/publish-images.yml
index f2de3ebe3..1c053792d 100644
--- a/.github/workflows/publish-images.yml
+++ b/.github/workflows/publish-images.yml
@@ -151,6 +151,14 @@ jobs:
         with:
           persist-credentials: false
 
+      - name: Reclaim runner disk for the agent image
+        if: matrix.service == 'agent' && matrix.platform == 'linux/amd64'
+        run: |
+          set -euo pipefail
+          sudo rm -rf /usr/local/lib/android /usr/share/dotnet /opt/ghc
+          docker system prune --all --force || true
+          df -h /
+
       - name: Derive platform slug
         run: |
           set -euo pipefail
diff --git a/.github/workflows/validate-images.yml b/.github/workflows/validate-images.yml
index 4b20df160..2094085c5 100644
--- a/.github/workflows/validate-images.yml
+++ b/.github/workflows/validate-images.yml
@@ -103,6 +103,14 @@ jobs:
         with:
           persist-credentials: false
 
+      - name: Reclaim runner disk for the agent image
+        if: matrix.service == 'agent' && matrix.platform == 'linux/amd64'
+        run: |
+          set -euo pipefail
+          sudo rm -rf /usr/local/lib/android /usr/share/dotnet /opt/ghc
+          docker system prune --all --force || true
+          df -h /
+
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # v3