diff --git a/templates/scripts/codex-agent.sh b/templates/scripts/codex-agent.sh
index 567b432..c35bccb 100755
--- a/templates/scripts/codex-agent.sh
+++ b/templates/scripts/codex-agent.sh
@@ -285,13 +285,84 @@ auto_commit_worktree_changes() {
 
   local default_message="Auto-finish: ${TASK_NAME}"
   local commit_message="${MUSAFETY_CODEX_AUTO_COMMIT_MESSAGE:-$default_message}"
+  local commit_output=""
 
-  if ! git -C "$wt" commit -m "$commit_message" >/dev/null 2>&1; then
-    echo "[codex-agent] Auto-commit failed in sandbox. Keeping branch for manual review: $branch" >&2
+  if commit_output="$(git -C "$wt" commit -m "$commit_message" 2>&1)"; then
+    echo "[codex-agent] Auto-committed sandbox changes on '${branch}'."
+    return 0
+  fi
+
+  if auto_sync_for_commit_retry "$wt" "$branch"; then
+    claim_changed_files "$wt" "$branch"
+    git -C "$wt" add -A
+    if commit_output="$(git -C "$wt" commit -m "$commit_message" 2>&1)"; then
+      echo "[codex-agent] Auto-committed sandbox changes on '${branch}' after sync retry."
+      return 0
+    fi
+  fi
+
+  echo "[codex-agent] Auto-commit failed in sandbox. Keeping branch for manual review: $branch" >&2
+  if [[ -n "$commit_output" ]]; then
+    printf '%s\n' "$commit_output" >&2
+  fi
+  return 1
+}
+
+auto_sync_for_commit_retry() {
+  local wt="$1"
+  local branch="$2"
+
+  if ! has_origin_remote; then
+    return 1
+  fi
+
+  local base_branch
+  base_branch="$(resolve_worktree_base_branch "$wt")"
+  if [[ -z "$base_branch" ]]; then
     return 1
   fi
 
-  echo "[codex-agent] Auto-committed sandbox changes on '${branch}'."
+  if ! git -C "$wt" fetch origin "$base_branch" --quiet; then
+    return 1
+  fi
+
+  if ! git -C "$wt" show-ref --verify --quiet "refs/remotes/origin/${base_branch}"; then
+    return 1
+  fi
+
+  local behind_count
+  behind_count="$(git -C "$wt" rev-list --left-right --count "HEAD...origin/${base_branch}" 2>/dev/null | awk '{print $2}')"
+  behind_count="${behind_count:-0}"
+  if [[ "$behind_count" -le 0 ]]; then
+    return 1
+  fi
+
+  echo "[codex-agent] Auto-commit retry: '${branch}' is behind origin/${base_branch} by ${behind_count} commit(s). Syncing and retrying..."
+
+  local stash_ref=""
+  local stash_output=""
+  if worktree_has_changes "$wt"; then
+    if ! stash_output="$(git -C "$wt" stash push --include-untracked -m "codex-agent-autocommit-sync-${branch}-$(date +%s)" 2>&1)"; then
+      return 1
+    fi
+    stash_ref="$(printf '%s\n' "$stash_output" | grep -o 'stash@{[0-9]\+}' | head -n 1 || true)"
+  fi
+
+  if ! git -C "$wt" rebase "origin/${base_branch}" >/dev/null 2>&1; then
+    git -C "$wt" rebase --abort >/dev/null 2>&1 || true
+    if [[ -n "$stash_ref" ]]; then
+      git -C "$wt" stash pop "$stash_ref" >/dev/null 2>&1 || true
+    fi
+    return 1
+  fi
+
+  if [[ -n "$stash_ref" ]]; then
+    if ! git -C "$wt" stash pop "$stash_ref" >/dev/null 2>&1; then
+      echo "[codex-agent] Auto-commit retry could not re-apply local changes after sync. Manual resolution required in: $wt" >&2
+      return 1
+    fi
+  fi
+
   return 0
 }
 
diff --git a/test/install.test.js b/test/install.test.js
index f9a8451..d9f69cf 100644
--- a/test/install.test.js
+++ b/test/install.test.js
@@ -1483,6 +1483,152 @@ exit 1
   assert.match(launchedArgs, /--model gpt-5\.4-mini/);
 });
 
+test('codex-agent still auto-finishes when base branch advances during task run', () => {
+  const repoDir = initRepo();
+  seedCommit(repoDir);
+  const originPath = attachOriginRemote(repoDir);
+
+  let result = runNode(['setup', '--target', repoDir, '--no-global-install'], repoDir);
+  assert.equal(result.status, 0, result.stderr || result.stdout);
+  result = runCmd('git', ['add', '.'], repoDir);
+  assert.equal(result.status, 0, result.stderr);
+  result = runCmd('git', ['commit', '-m', 'apply gx setup'], repoDir, {
+    ALLOW_COMMIT_ON_PROTECTED_BRANCH: '1',
+  });
+  assert.equal(result.status, 0, result.stderr || result.stdout);
+  result = runCmd('git', ['push', 'origin', 'dev'], repoDir);
+  assert.equal(result.status, 0, result.stderr || result.stdout);
+
+  result = runCmd('git', ['config', 'multiagent.sync.requireBeforeCommit', 'true'], repoDir);
+  assert.equal(result.status, 0, result.stderr || result.stdout);
+  result = runCmd('git', ['config', 'multiagent.sync.maxBehindCommits', '0'], repoDir);
+  assert.equal(result.status, 0, result.stderr || result.stdout);
+
+  const fakeCodexBin = fs.mkdtempSync(path.join(os.tmpdir(), 'musafety-fake-codex-retry-'));
+  const fakeCodexPath = path.join(fakeCodexBin, 'codex');
+  fs.writeFileSync(
+    fakeCodexPath,
+    `#!/usr/bin/env bash\n` +
+      `set -e\n` +
+      `pwd > "${'${MUSAFETY_TEST_CODEX_CWD}'}"\n` +
+      `echo "$@" > "${'${MUSAFETY_TEST_CODEX_ARGS}'}"\n` +
+      `echo "retry" > codex-autocommit-retry.txt\n` +
+      `clone_dir="${'${MUSAFETY_TEST_ORIGIN_ADVANCE_CLONE}'}"\n` +
+      `rm -rf "$clone_dir"\n` +
+      `git clone "${'${MUSAFETY_TEST_ORIGIN_PATH}'}" "$clone_dir" >/dev/null 2>&1\n` +
+      `git -C "$clone_dir" config user.email "bot@example.com"\n` +
+      `git -C "$clone_dir" config user.name "Bot"\n` +
+      `git -C "$clone_dir" checkout dev >/dev/null 2>&1\n` +
+      `echo "advance base" > "$clone_dir/base-advance.txt"\n` +
+      `git -C "$clone_dir" add base-advance.txt\n` +
+      `git -C "$clone_dir" commit -m "advance base during codex run" >/dev/null 2>&1\n` +
+      `git -C "$clone_dir" push origin dev >/dev/null 2>&1\n`,
+    'utf8',
+  );
+  fs.chmodSync(fakeCodexPath, 0o755);
+
+  const { fakePath: fakeGhPath } = createFakeGhScript(`
+if [[ "$1" == "pr" && "$2" == "create" ]]; then
+  exit 0
+fi
+if [[ "$1" == "pr" && "$2" == "view" ]]; then
+  if [[ " $* " == *" --json state,mergedAt,url "* ]]; then
+    printf 'MERGED\\t2026-04-13T00:00:00Z\\thttps://example.test/pr/autocommit-retry\\n'
+    exit 0
+  fi
+  if [[ " $* " == *" --json url "* ]]; then
+    echo "https://example.test/pr/autocommit-retry"
+    exit 0
+  fi
+  echo "unexpected gh pr view args: $*" >&2
+  exit 1
+fi
+if [[ "$1" == "pr" && "$2" == "merge" ]]; then
+  exit 0
+fi
+echo "unexpected gh args: $*" >&2
+exit 1
+`);
+
+  const cwdMarker = path.join(repoDir, '.codex-agent-cwd-autocommit-retry');
+  const argsMarker = path.join(repoDir, '.codex-agent-args-autocommit-retry');
+  const originAdvanceClone = path.join(repoDir, '.origin-advance-clone');
+  const launch = runCmd(
+    'bash',
+    ['scripts/codex-agent.sh', 'autocommit-retry-task', 'planner', 'dev', '--model', 'gpt-5.4-mini'],
+    repoDir,
+    {
+      PATH: `${fakeCodexBin}:${process.env.PATH}`,
+      MUSAFETY_TEST_CODEX_CWD: cwdMarker,
+      MUSAFETY_TEST_CODEX_ARGS: argsMarker,
+      MUSAFETY_TEST_ORIGIN_PATH: originPath,
+      MUSAFETY_TEST_ORIGIN_ADVANCE_CLONE: originAdvanceClone,
+      MUSAFETY_GH_BIN: fakeGhPath,
+      MUSAFETY_FINISH_WAIT_TIMEOUT_SECONDS: '60',
+      MUSAFETY_FINISH_WAIT_POLL_SECONDS: '0',
+    },
+  );
+  assert.equal(launch.status, 0, launch.stderr || launch.stdout);
+  const sawCommitRetry = /Auto-commit retry: .*behind origin\/dev/.test(launch.stdout);
+  const sawFinishSync = /\[agent-sync-guard\] Auto-syncing .* onto origin\/dev before finish/.test(launch.stdout);
+  assert.equal(
+    sawCommitRetry || sawFinishSync,
+    true,
+    `expected sync retry evidence in output, got:\n${launch.stdout}`,
+  );
+  assert.match(launch.stdout, /\[codex-agent\] Auto-finish completed for/);
+  assert.match(launch.stdout, /\[codex-agent\] Auto-cleaned sandbox worktree:/);
+
+  const launchedCwd = fs.readFileSync(cwdMarker, 'utf8').trim();
+  assert.equal(fs.existsSync(launchedCwd), false, 'auto-finished sandbox should be cleaned by default');
+});
+
+test('codex-agent surfaces commit-hook failures so unfinished sandboxes are actionable', () => {
+  const repoDir = initRepo();
+  seedCommit(repoDir);
+  attachOriginRemote(repoDir);
+
+  let result = runNode(['setup', '--target', repoDir, '--no-global-install'], repoDir);
+  assert.equal(result.status, 0, result.stderr || result.stdout);
+  result = runCmd('git', ['add', '.'], repoDir);
+  assert.equal(result.status, 0, result.stderr);
+  result = runCmd('git', ['commit', '-m', 'apply gx setup'], repoDir, {
+    ALLOW_COMMIT_ON_PROTECTED_BRANCH: '1',
+  });
+  assert.equal(result.status, 0, result.stderr || result.stdout);
+  result = runCmd('git', ['push', 'origin', 'dev'], repoDir);
+  assert.equal(result.status, 0, result.stderr || result.stdout);
+
+  fs.writeFileSync(
+    path.join(repoDir, '.githooks', 'pre-commit'),
+    '#!/usr/bin/env bash\nset -euo pipefail\necho "forced pre-commit failure for test" >&2\nexit 1\n',
+    'utf8',
+  );
+  fs.chmodSync(path.join(repoDir, '.githooks', 'pre-commit'), 0o755);
+  result = runCmd('git', ['config', 'core.hooksPath', `${repoDir}/.githooks`], repoDir);
+  assert.equal(result.status, 0, result.stderr || result.stdout);
+
+  const fakeCodexBin = fs.mkdtempSync(path.join(os.tmpdir(), 'musafety-fake-codex-hookfail-'));
+  const fakeCodexPath = path.join(fakeCodexBin, 'codex');
+  fs.writeFileSync(fakeCodexPath, '#!/usr/bin/env bash\nset -e\necho "hook-fail" > codex-hook-fail.txt\n', 'utf8');
+  fs.chmodSync(fakeCodexPath, 0o755);
+
+  const launch = runCmd(
+    'bash',
+    ['scripts/codex-agent.sh', 'hook-fail-task', 'planner', 'dev'],
+    repoDir,
+    {
+      PATH: `${fakeCodexBin}:${process.env.PATH}`,
+      MUSAFETY_CODEX_WAIT_FOR_MERGE: 'false',
+      MUSAFETY_FINISH_WAIT_TIMEOUT_SECONDS: '30',
+      MUSAFETY_FINISH_WAIT_POLL_SECONDS: '0',
+    },
+  );
+  assert.notEqual(launch.status, 0, launch.stderr || launch.stdout);
+  assert.match(launch.stderr, /Auto-commit failed in sandbox/);
+  assert.match(launch.stderr, /forced pre-commit failure for test/);
+});
+
 test('sync command rebases current agent branch onto latest origin/dev', () => {
   const repoDir = initRepo();
   seedCommit(repoDir);