diff --git a/.github/workflows/opencode.yml b/.github/workflows/opencode.yml
new file mode 100644
index 0000000000..47fb6e615e
--- /dev/null
+++ b/.github/workflows/opencode.yml
@@ -0,0 +1,29 @@
+name: opencode
+
+on:
+  issue_comment:
+    types: [created]
+  pull_request_review_comment:
+    types: [created]
+
+jobs:
+  opencode:
+    if: |
+      startsWith(github.event.comment.body, '/oc') ||
+      startsWith(github.event.comment.body, '/opencode')
+    runs-on: ubuntu-latest
+    permissions:
+      id-token: write
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v6
+        with:
+          fetch-depth: 1
+          persist-credentials: false
+
+      - name: Run OpenCode
+        uses: anomalyco/opencode/github@v1.18.4
+        env:
+          OPENCODE_API_KEY: ${{ secrets.OPENCODE_API_KEY }}
+        with:
+          model: opencode/deepseek-v4-flash-free