diff --git a/.github/workflows/description-check.yml b/.github/workflows/description-check.yml
new file mode 100644
index 00000000..53e6df85
--- /dev/null
+++ b/.github/workflows/description-check.yml
@@ -0,0 +1,21 @@
+name: description check
+on:
+  pull_request:
+permissions:
+  contents: read
+  pull-requests: write
+  id-token: write
+  checks: write
+jobs:
+  verify:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v5
+        with:
+          fetch-depth: 0
+          ref: ${{ github.event.pull_request.head.sha }}
+      - uses: lemahq/lema-verify@v1
+        with:
+          api-url: https://lema-api-4wojvodvaq-uc.a.run.app   # STAGE — not api.lema.sh
+          github-token: ${{ github.token }}
+          record-decisions: true
diff --git a/retry/retry.go b/retry/retry.go
new file mode 100644
index 00000000..570283cd
--- /dev/null
+++ b/retry/retry.go
@@ -0,0 +1,22 @@
+// Package retry retries an operation with exponential backoff.
+package retry
+
+import "time"
+
+// Do runs fn up to attempts times. After each failure it waits, doubling the
+// delay each round (exponential backoff), and returns the final error if every
+// attempt fails.
+func Do(attempts int, base time.Duration, fn func() error) error {
+      delay := base
+      var err error
+      for i := 0; i < attempts; i++ {
+              if err = fn(); err == nil {
+                      return nil
+              }
+              if i < attempts-1 {
+                      time.Sleep(delay)
+                      delay *= 2
+              }
+      }
+      return err
+}