diff --git a/.github/workflows/pr-comment.yml b/.github/workflows/pr-comment.yml
index 455112c..44e6c33 100644
--- a/.github/workflows/pr-comment.yml
+++ b/.github/workflows/pr-comment.yml
@@ -26,7 +26,7 @@ jobs:
           run-id: ${{ github.event.workflow_run.id }}
           github-token: ${{ secrets.GITHUB_TOKEN }}
 
-      - name: Post or update comment
+      - name: Post comment
         uses: actions/github-script@v7
         with:
           github-token: ${{ secrets.BOT_TOKEN || secrets.GITHUB_TOKEN }}
@@ -34,12 +34,20 @@ jobs:
             const fs = require('fs');
             const marker = '<!-- pr-check-bot -->';
 
+            // Check if there are findings to post
+            const commentFile = 'pr-meta/comment.md';
+            if (!fs.existsSync(commentFile)) {
+              console.log('No findings to post — skipping.');
+              return;
+            }
+
             // Determine the PR number
             let prNumber;
             const numberFile = 'pr-meta/number.txt';
             if (fs.existsSync(numberFile)) {
               prNumber = parseInt(fs.readFileSync(numberFile, 'utf8').trim());
-            } else {
+            }
+            if (!prNumber) {
               // workflow_run.pull_requests is empty for fork PRs, so
               // fall back to searching by head SHA if needed
               const prs = context.payload.workflow_run.pull_requests;
@@ -53,48 +61,34 @@ jobs:
                   state: 'open',
                   sort: 'updated',
                   direction: 'desc',
-                  per_page: 10,
+                  per_page: 100,
                 });
                 const match = prList.find(pr => pr.head.sha === headSha);
                 if (!match) {
-                  console.log(`No open PR found for SHA ${headSha} — skipping comment.`);
+                  console.log(`No open PR found for SHA ${headSha} — skipping.`);
                   return;
                 }
                 prNumber = match.number;
               }
             }
 
-            // Find existing bot comment
+            // Skip if we already commented on this PR
             const { data: comments } = await github.rest.issues.listComments({
               owner: context.repo.owner,
               repo: context.repo.repo,
               issue_number: prNumber,
+              per_page: 100,
             });
-            const existing = comments.find(c => c.body.includes(marker));
-
-            const commentFile = 'pr-meta/comment.md';
-            if (fs.existsSync(commentFile)) {
-              const body = fs.readFileSync(commentFile, 'utf8').trim();
-              if (existing) {
-                await github.rest.issues.updateComment({
-                  owner: context.repo.owner,
-                  repo: context.repo.repo,
-                  comment_id: existing.id,
-                  body,
-                });
-              } else {
-                await github.rest.issues.createComment({
-                  owner: context.repo.owner,
-                  repo: context.repo.repo,
-                  issue_number: prNumber,
-                  body,
-                });
-              }
-            } else if (existing) {
-              // No findings — remove stale comment
-              await github.rest.issues.deleteComment({
-                owner: context.repo.owner,
-                repo: context.repo.repo,
-                comment_id: existing.id,
-              });
+            if (comments.some(c => c.body.includes(marker))) {
+              console.log('Bot comment already exists — skipping.');
+              return;
             }
+
+            // Post the comment
+            const body = fs.readFileSync(commentFile, 'utf8').trim();
+            await github.rest.issues.createComment({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: prNumber,
+              body,
+            });
diff --git a/lib/checks/__pycache__/check-links.cpython-310.pyc b/lib/checks/__pycache__/check-links.cpython-310.pyc
deleted file mode 100644
index 4fc6b74..0000000
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diff --git a/lib/checks/__pycache__/check-readme-edits.cpython-310.pyc b/lib/checks/__pycache__/check-readme-edits.cpython-310.pyc
deleted file mode 100644
index 6eb4ca8..0000000
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diff --git a/lib/checks/__pycache__/check-template.cpython-310.pyc b/lib/checks/__pycache__/check-template.cpython-310.pyc
deleted file mode 100644
index d49b256..0000000
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diff --git a/lib/checks/__pycache__/check-yaml-diff.cpython-310.pyc b/lib/checks/__pycache__/check-yaml-diff.cpython-310.pyc
deleted file mode 100644
index 51c91bf..0000000
Binary files a/lib/checks/__pycache__/check-yaml-diff.cpython-310.pyc and /dev/null differ
diff --git a/lib/checks/__pycache__/detect-changes.cpython-310.pyc b/lib/checks/__pycache__/detect-changes.cpython-310.pyc
deleted file mode 100644
index 89c8601..0000000
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diff --git a/lib/checks/__pycache__/warn-non-yaml.cpython-310.pyc b/lib/checks/__pycache__/warn-non-yaml.cpython-310.pyc
deleted file mode 100644
index 5329521..0000000
Binary files a/lib/checks/__pycache__/warn-non-yaml.cpython-310.pyc and /dev/null differ
diff --git a/lib/checks/check-additions.py b/lib/checks/check-additions.py
index 474c651..b637d89 100644
--- a/lib/checks/check-additions.py
+++ b/lib/checks/check-additions.py
@@ -86,12 +86,13 @@ def check_required_fields(diff, head):
     for svc in diff.get("services", {}).get("modified", []):
         if not head:
             continue
+        changed = svc.get("changed_fields", [])
         fields = find_service_fields(
             head, svc["category"], svc["section"], svc["service"]
         )
         if fields:
             for f in REQUIRED_FIELDS:
-                if not fields.get(f):
+                if f in changed and not fields.get(f):
                     missing.add(f)
     if missing:
         names = ", ".join(f"`{f}`" for f in sorted(missing))
@@ -120,16 +121,12 @@ def check_open_source(diff):
 
 
 def check_single_entry(diff):
-    """Return a finding if the diff contains multiple service or section changes."""
+    """Return a finding if the diff adds multiple new services or sections."""
     services = diff.get("services", {})
-    svc_count = (
-        len(services.get("added", []))
-        + len(services.get("removed", []))
-        + len(services.get("modified", []))
-    )
-    if svc_count > 1:
+    added_count = len(services.get("added", []))
+    if added_count > 1:
         return MULTIPLE_MSG
-    if svc_count == 0:
+    if added_count == 0:
         sec_count = len(diff.get("sections", []))
         if sec_count > 1:
             return MULTIPLE_MSG