From 20db21237b4d790dd7e3637384bea1e1da6312c3 Mon Sep 17 00:00:00 2001
From: Teodor Calin <teodor@vulturelabs.io>
Date: Fri, 29 May 2026 10:07:44 -0700
Subject: [PATCH] ci: post Cloudflare Pages preview URL as PR comment

PR #4 added the deploy step but the wrangler-action does not auto-post a
PR comment, so reviewers can't see the preview URL without digging into
workflow logs (verified on PRs #12-14: deploy succeeded, comment missing).

This adds a sticky comment step that uses the deployment-url output from
the wrangler-action and posts (or updates) a single comment per PR via
marocchino/sticky-pull-request-comment@v2.

Also bumps the workflow's permissions to include pull-requests: write,
which is required for the comment step.
---
 .github/workflows/ci.yml | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3b71e65..1b5136f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,6 +10,8 @@ permissions:
   contents: read
   # Required by wrangler-action for OIDC / deployments comment posting.
   deployments: write
+  # Required so the post-deploy step can comment the preview URL on the PR.
+  pull-requests: write
 
 jobs:
   build:
@@ -38,6 +40,7 @@ jobs:
       #   - PR from internal branch → preview (<branch>.pilotprotocol.pages.dev)
       #   - PR from a fork          → skipped (no secret access on forks)
       - name: Deploy to Cloudflare Pages
+        id: deploy
         if: |
           github.event_name == 'push' ||
           (github.event_name == 'pull_request' &&
@@ -53,3 +56,20 @@ jobs:
             --project-name=pilotprotocol
             --branch=${{ github.event_name == 'push' && 'main' || github.head_ref }}
             --commit-dirty=true
+
+      # Sticky comment so subsequent pushes update the same comment
+      # instead of stacking — keeps the PR thread clean. Header value
+      # must be unique per comment kind on this repo.
+      - name: Comment preview URL on PR
+        if: |
+          github.event_name == 'pull_request' &&
+          steps.deploy.outputs.deployment-url
+        uses: marocchino/sticky-pull-request-comment@v2
+        with:
+          header: cloudflare-pages-preview
+          message: |
+            🚀 **Preview deployed to Cloudflare Pages**
+
+            - Commit deploy URL: ${{ steps.deploy.outputs.deployment-url }}
+            - Branch alias: `https://${{ github.head_ref }}.pilotprotocol.pages.dev` (may take ~30s to propagate)
+            - Commit: `${{ github.event.pull_request.head.sha }}`