fix: detect saved work on cancelled keepalive runs

.github/scripts/keepalive_loop.js

@@ -3059,6 +3059,39 @@ async function updateKeepaliveLoopSummary({ github: rawGithub, context, core, in
         } else if (runResult === 'cancelled') {
           failure = {};
           summaryReason = 'agent-run-cancelled';
+
+          // When a run is cancelled (typically timeout), agent outputs are
+          // lost.  Check the PR branch for recent commits to detect whether
+          // the pre-timeout watchdog or the agent itself saved any work.
+          if (!agentCommitSha && !agentChangesMade && prNumber) {
+            try {
+              const pr = await fetchPullRequestCached(github, context, prNumber, cache);
+              if (pr?.head?.ref) {
+                const since = previousState?.current_iteration_at || previousState?.first_iteration_at;
+                const commitsResp = await github.rest.repos.listCommits({
+                  ...context.repo,
+                  sha: pr.head.ref,
+                  ...(since ? { since } : {}),
+                  per_page: 5,
+                });
+                const recentCommits = (commitsResp?.data || []).filter(c => {
+                  const msg = c?.commit?.message || '';
+                  return msg.includes('pre-timeout checkpoint') ||
+                    msg.includes('codex-keepalive') ||
+                    msg.includes('apply updates');
+                });
+                if (recentCommits.length > 0) {
+                  summaryReason = 'agent-run-cancelled-with-saved-work';
+                  core?.info?.(
+                    `Cancelled run had ${recentCommits.length} commit(s) saved ` +
+                    `(latest: ${recentCommits[0]?.sha?.slice(0, 7)})`
+                  );
+                }
+              }
+            } catch (e) {
+              core?.info?.(`Branch commit detection failed: ${e.message}`);
+            }
+          }
         } else if (isTransientFailure) {
           failure = {};
           summaryReason = 'agent-run-transient';
@@ -3340,19 +3373,28 @@ async function updateKeepaliveLoopSummary({ github: rawGithub, context, core, in
           '- Wait for conditions to resolve (e.g., Gate success, labels present)',
         );
       } else if (runResult === 'cancelled') {
+        const savedWork = summaryReason === 'agent-run-cancelled-with-saved-work';
         summaryLines.push(
           `| Result | Value |`,
           `|--------|-------|`,
-          `| Status | 🚫 Cancelled |`,
+          `| Status | ${savedWork ? '⏱️ Timed out (work saved)' : '🚫 Cancelled'} |`,
           `| Reason | ${summaryReason || 'agent-run-cancelled'} |`,
         );
-        
+
         // Add restart instructions for cancelled runs
-        summaryLines.push(
-          '',
-          '**To retry:**',
-          '- Add the `agent:retry` label to this PR',
-        );
+        if (savedWork) {
+          summaryLines.push(
+            '',
+            '**Note:** The pre-timeout watchdog committed work before the job was cancelled.',
+            'The next keepalive iteration will continue from where the agent left off.',
+          );
+        } else {
+          summaryLines.push(
+            '',
+            '**To retry:**',
+            '- Add the `agent:retry` label to this PR',
+          );
+        }
       } else {
         summaryLines.push(
           `| Result | Value |`,