diff --git a/packages/capability-matrix/actions/sdk-compliance-check-setup/action.yml b/packages/capability-matrix/actions/sdk-compliance-check-setup/action.yml
index dcfacd2..c36013a 100644
--- a/packages/capability-matrix/actions/sdk-compliance-check-setup/action.yml
+++ b/packages/capability-matrix/actions/sdk-compliance-check-setup/action.yml
@@ -1,11 +1,6 @@
 name: Set up SDK compliance public API check
 description: Checks out the PR branch and base branch, then installs script dependencies. Expects the supabase/sdk checkout at _sdk-spec (the reusable workflows set it up).
 
-inputs:
-  sdk-ref:
-    description: Transitional, only set by pre-v1.4.0 reusable workflows that reference this action remotely. When non-empty, the action checks out the capability spec itself at this ref. Remove once every caller references the action locally.
-    default: ""
-
 runs:
   using: composite
   steps:
@@ -20,17 +15,6 @@ runs:
         ref: ${{ github.event.pull_request.base.sha }}
         path: _sdk-base
 
-    # Transitional compatibility for pre-v1.4.0 reusable workflows: they
-    # reference this action remotely and always pass a non-empty sdk-ref.
-    # Current workflows check out _sdk-spec themselves and leave it empty.
-    - name: Checkout capability spec
-      if: ${{ inputs.sdk-ref != '' }}
-      uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
-      with:
-        repository: supabase/sdk
-        ref: ${{ inputs.sdk-ref }}
-        path: _sdk-spec
-
     - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
       with:
         node-version: "22"
diff --git a/packages/capability-matrix/actions/sdk-compliance-validate/action.yml b/packages/capability-matrix/actions/sdk-compliance-validate/action.yml
index e6f176b..9fae915 100644
--- a/packages/capability-matrix/actions/sdk-compliance-validate/action.yml
+++ b/packages/capability-matrix/actions/sdk-compliance-validate/action.yml
@@ -5,29 +5,9 @@ inputs:
   compliance-file:
     description: Path to sdk-compliance.yaml in the calling repo
     default: sdk-compliance.yaml
-  sdk-ref:
-    description: Transitional, only set by pre-v1.4.0 reusable workflows that reference this action remotely. When non-empty, the action performs its own checkouts at this ref. Remove once every caller references the action locally.
-    default: ""
-
 runs:
   using: composite
   steps:
-    # Transitional compatibility for pre-v1.4.0 reusable workflows: they
-    # reference this action remotely (so nothing is checked out yet) and
-    # always pass a non-empty sdk-ref. Current workflows perform both
-    # checkouts themselves and leave sdk-ref empty.
-    - name: Checkout SDK repo
-      if: ${{ inputs.sdk-ref != '' }}
-      uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
-
-    - name: Checkout capability spec
-      if: ${{ inputs.sdk-ref != '' }}
-      uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
-      with:
-        repository: supabase/sdk
-        ref: ${{ inputs.sdk-ref }}
-        path: _sdk-spec
-
     - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
       with:
         node-version: "22"