diff --git a/.github/scripts/pw-triage-comment.js b/.github/scripts/pw-triage-comment.js
new file mode 100644
index 0000000000..0edba012c5
--- /dev/null
+++ b/.github/scripts/pw-triage-comment.js
@@ -0,0 +1,65 @@
+#!/usr/bin/env node
+// Render the sticky PR shard-triage comment from $MATRIX + the select log (argv[2]) to stdout.
+const fs = require("fs");
+
+function readLog(path) {
+  if (!path) return "";
+  try {
+    return fs.readFileSync(path, "utf8").trim();
+  } catch {
+    return "";
+  }
+}
+
+const marker = process.env.MARKER || "<!-- playwright-shard-triage -->";
+const smokeActive = process.env.SMOKE_ACTIVE === "true";
+const headSha = (process.env.HEAD_SHA || "").slice(0, 9);
+const attempt = process.env.ATTEMPT || "1";
+const log = readLog(process.argv[2]);
+
+let matrix;
+try {
+  matrix = JSON.parse(process.env.MATRIX || "{}");
+} catch {
+  matrix = {};
+}
+const shards = Array.isArray(matrix.include) ? matrix.include : [];
+
+// smoke_active only says selection ran; a global_paths hit still returns the full
+// matrix, so infer the real mode from the log rather than the flag alone.
+const fellBackToFull = /falling back to full matrix|full matrix:/.test(log);
+const mode = smokeActive && !fellBackToFull ? "smoke (changed-path)" : "full matrix";
+
+const specsOf = (s) => (Array.isArray(s.run_files) ? s.run_files.length : 0);
+const totalSpecs = shards.reduce((n, s) => n + specsOf(s), 0);
+const shardList = shards
+  .map((s) => `${s.testfolder} (${specsOf(s)})`)
+  .join(" · ");
+
+const lines = [
+  marker,
+  "### 🎯 Playwright shard selection",
+  `Mode: **${mode}** · **${shards.length} shard${shards.length === 1 ? "" : "s"}** · **${totalSpecs} spec${totalSpecs === 1 ? "" : "s"}**`,
+  "",
+  shardList || "_no shards selected_",
+];
+
+if (log) {
+  lines.push(
+    "",
+    "<details><summary>Why these shards</summary>",
+    "",
+    "```",
+    log,
+    "```",
+    "",
+    "</details>"
+  );
+}
+
+lines.push(
+  "",
+  `<sub>Updated for \`${headSha}\` · attempt ${attempt} · updates in place on every push.</sub>`
+);
+
+process.stdout.write(lines.join("\n") + "\n");
diff --git a/.github/workflows/playwright.yml b/.github/workflows/playwright.yml
index 71ebd2433b..f0e140742c 100644
--- a/.github/workflows/playwright.yml
+++ b/.github/workflows/playwright.yml
@@ -322,6 +322,30 @@ jobs:
             echo '```'
           } >> "$GITHUB_STEP_SUMMARY"
 
+      # One sticky comment per PR (found by the hidden marker) so the triage result updates
+      # in place on every push instead of spamming a fresh comment. Same idiom as Kinora below.
+      - name: Upsert shard-selection comment on PR
+        if: ${{ github.event_name == 'pull_request' }}
+        continue-on-error: true
+        env:
+          GH_TOKEN: ${{ secrets.ORG_ADMIN_TOKEN }}   # PAT: comment as a human, not github-actions[bot]
+          REPO: ${{ github.repository }}
+          PR_NUMBER: ${{ github.event.pull_request.number }}
+          HEAD_SHA: ${{ github.event.pull_request.head.sha }}
+          MATRIX: ${{ steps.gen.outputs.matrix }}
+          SMOKE_ACTIVE: ${{ steps.gen.outputs.smoke_active }}
+          ATTEMPT: ${{ github.run_attempt }}
+        run: |
+          MARKER="<!-- playwright-shard-triage -->"
+          BODY=$(MARKER="$MARKER" node .github/scripts/pw-triage-comment.js /tmp/pw-select-log.txt)
+          CID=$(gh api "repos/$REPO/issues/$PR_NUMBER/comments" --paginate \
+                  -q ".[] | select(.body | contains(\"$MARKER\")) | .id" | head -1)
+          if [ -n "$CID" ]; then
+            gh api -X PATCH "repos/$REPO/issues/comments/$CID" -f body="$BODY" >/dev/null && echo "Updated triage comment ($CID)."
+          else
+            gh api -X POST "repos/$REPO/issues/$PR_NUMBER/comments" -f body="$BODY" >/dev/null && echo "Posted triage comment."
+          fi
+
   ui_integration_tests:
     timeout-minutes: 45
     name: e2e / ${{ matrix.testfolder }}