Run version memory guard in CI

.github/workflows/ci.yml

@@ -151,6 +151,18 @@ jobs:
             fi
           fi
 
+      - name: Run CLI version memory guard regression
+        run: |
+          set -euo pipefail
+
+          CLI_BIN="$(find "$HOME/Library/Developer/Xcode/DerivedData" -path "*/Build/Products/Debug/cmux" -print -quit)"
+          if [ -z "${CLI_BIN:-}" ] || [ ! -x "$CLI_BIN" ]; then
+            echo "cmux CLI binary not found in DerivedData" >&2
+            exit 1
+          fi
+
+          CMUX_CLI_BIN="$CLI_BIN" python3 tests/test_cli_version_memory_guard.py
+
   tests-depot:
     # Never run Depot jobs for fork pull requests (avoid billing on external PRs).
     if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository