create codex configuration

codex/doctor.sh

@@ -0,0 +1,39 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+# shellcheck source=./lib.sh
+source "$SCRIPT_DIR/lib.sh"
+
+cd_repo_root
+
+echo "=== codex doctor ==="
+echo "repo: $(pwd)"
+echo "time: $(date -u +%FT%TZ)"
+echo
+
+echo "--- tools ---"
+for cmd in bash git python3 docker; do
+  if have "$cmd"; then
+    echo "$cmd: $(command -v "$cmd")"
+  else
+    echo "$cmd: MISSING"
+  fi
+done
+echo
+
+echo "--- repo ---"
+[[ -f services-up.sh ]] && echo "services-up.sh: present" || echo "services-up.sh: missing"
+[[ -d core ]] && echo "core/: present" || true
+[[ -d apps ]] && echo "apps/: present" || true
+[[ -d monitoring ]] && echo "monitoring/: present" || true
+echo
+
+echo "--- git status ---"
+git status --short || true
+echo
+
+if have docker && docker compose version >/dev/null 2>&1; then
+  echo "--- docker compose ---"
+  docker compose version || true
+fi