[Fix] Guard likely owner commit links

src/clawsweeper.ts

@@ -3606,6 +3606,10 @@ function shortSha(sha: string): string {
   return sha.slice(0, 12);
 }
 
+function isCommitSha(value: string): boolean {
+  return /^[0-9a-f]{7,40}$/i.test(value.trim());
+}
+
 function releaseUrl(tag: string): string {
   return repoUrl(`/releases/tag/${encodeURIComponent(tag)}`);
 }
@@ -4095,7 +4099,8 @@ function likelyOwnerLine(owner: LikelyOwner): string {
   const role = owner.role.trim();
   const reason = sentence(owner.reason.trim() || "Related by repository history.");
   const commits = owner.commits
-    .filter(Boolean)
+    .map((commit) => commit.trim())
+    .filter(isCommitSha)
     .slice(0, 3)
     .map((commit) => linkedSha(commit))
     .join(", ");

test/clawsweeper.test.ts

@@ -626,6 +626,32 @@ test("close comments suppress duplicate best solution text", () => {
   assert.doesNotMatch(action.closeComment, /Best possible solution:/);
 });
 
+test("likely owner commit links ignore non-sha values", () => {
+  const action = reviewActionForDecision({
+    item: item(),
+    decision: closeDecision({
+      likelyOwners: [
+        {
+          person: "@alice",
+          role: "feature contributor",
+          reason: "The changelog credits a pull request for this feature surface.",
+          commits: ["https://github.com/openclaw/openclaw/pull/76079", " abcdef1234567890 "],
+          files: ["CHANGELOG.md"],
+          confidence: "medium",
+        },
+      ],
+    }),
+    git,
+  });
+
+  assert.equal(action.actionTaken, "proposed_close");
+  assert.doesNotMatch(action.closeComment, /\/commit\/https:/);
+  assert.match(
+    action.closeComment,
+    /\[abcdef123456\]\(https:\/\/github\.com\/openclaw\/openclaw\/commit\/abcdef1234567890\)/,
+  );
+});
+
 test("skill-only OpenClaw PRs can close through ClawHub with upload guidance", () => {
   const decision = closeDecision({
     closeReason: "clawhub",