diff --git a/.github/workflows/oasdiff.yml b/.github/workflows/oasdiff.yml
deleted file mode 100644
index 2314206c..00000000
--- a/.github/workflows/oasdiff.yml
+++ /dev/null
@@ -1,51 +0,0 @@
-name: oasdiff (OpenAPI breaking-change check)
-
-on:
-  pull_request:
-    branches: [master]
-    paths:
-      - 'internal/handlers/openapi.go'
-      - 'go.mod'
-      - 'go.sum'
-
-permissions:
-  contents: read
-  pull-requests: write
-
-jobs:
-  diff:
-    runs-on: ubuntu-latest
-    timeout-minutes: 10
-    steps:
-      - name: Checkout PR
-        uses: actions/checkout@v6
-        with:
-          path: api
-      - uses: actions/checkout@v6
-        with:
-          repository: InstaNode-dev/common
-          path: common
-        continue-on-error: true
-      - uses: actions/checkout@v6
-        with:
-          repository: InstaNode-dev/proto
-          path: proto
-        continue-on-error: true
-      - uses: actions/setup-go@v6
-        with:
-          go-version-file: api/go.mod
-      - name: Build openapi.json from PR
-        working-directory: api
-        run: |
-          go run ./cmd/openapi > /tmp/pr-openapi.json 2>/dev/null || \
-            (go build ./... && ./api --emit-openapi > /tmp/pr-openapi.json 2>/dev/null) || \
-            echo "WARNING: no openapi-emit binary found; fetching live spec"
-      - name: Fetch live prod openapi for comparison
-        run: |
-          curl -sSfL https://api.instanode.dev/openapi.json -o /tmp/master-openapi.json || \
-            echo '{"openapi":"3.1.0","paths":{}}' > /tmp/master-openapi.json
-      - uses: oasdiff/oasdiff-action/breaking@main
-        with:
-          base: /tmp/master-openapi.json
-          revision: /tmp/pr-openapi.json
-          fail-on-diff: false  # warn-only initially; flip to true once known-good baseline exists