Fix 403 when posting lint comments on fork PRs

.github/workflows/lint-plugins.yml

@@ -11,14 +11,13 @@ jobs:
     runs-on: ubuntu-latest
     permissions:
       contents: read
-      pull-requests: write
 
     steps:
       - name: Checkout code
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Run skillsaw
-        uses: stbenjam/skillsaw@d475638873e09327262ae82f5657d390a91a3c8a # v0
+        uses: stbenjam/skillsaw@eee9ebea0f33517bfb3c4d0413471c5165becc7e # v0
         with:
           strict: true
           verbose: true

.github/workflows/lint-review.yml

@@ -0,0 +1,25 @@
+# Separate workflow for posting lint review comments on PRs.
+# The lint workflow runs with a read-only token (safe for fork PRs that
+# execute custom linter rules via subprocess). This workflow triggers
+# after it completes, downloads the report artifact, and posts comments
+# with a write-capable token — without ever checking out untrusted code.
+name: Lint Review
+
+on:
+  workflow_run:
+    workflows: ["Lint Plugins"]
+    types: [completed]
+
+jobs:
+  review:
+    if: github.event.workflow_run.event == 'pull_request'
+    runs-on: ubuntu-latest
+    permissions:
+      pull-requests: write
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+      - name: Post review comments
+        uses: stbenjam/skillsaw/review@eee9ebea0f33517bfb3c4d0413471c5165becc7e # v0