chore: import upstream snapshot with attribution

scripts/local-install.sh

@@ -0,0 +1,41 @@
+#!/usr/bin/env bash
+# Build the current branch and link it as the global `codegraph` for
+# hands-on testing. Replaces any existing global install for as long
+# as the symlink is in place.
+#
+# Usage:
+#   ./scripts/local-install.sh           # build + link
+#   ./scripts/local-install.sh --undo    # unlink + restore the published version
+
+set -euo pipefail
+
+cd "$(dirname "$0")/.."
+
+PKG=$(node -p "require('./package.json').name")
+VERSION=$(node -p "require('./package.json').version")
+BRANCH=$(git rev-parse --abbrev-ref HEAD)
+
+if [ "${1:-}" = "--undo" ]; then
+  echo "→ unlinking ${PKG}"
+  npm unlink -g "${PKG}" >/dev/null 2>&1 || true
+  echo "→ reinstalling published ${PKG}"
+  npm install -g "${PKG}"
+  echo "done: global codegraph -> $(command -v codegraph)"
+  exit 0
+fi
+
+echo "→ building ${PKG} ${VERSION} (${BRANCH})"
+npm run build
+
+echo "→ linking globally"
+npm link
+
+LINKED=$(command -v codegraph || echo "(not on PATH)")
+echo
+echo "✓ global codegraph now points to this branch"
+echo "  binary:  ${LINKED}"
+echo "  branch:  ${BRANCH}"
+echo "  version: ${VERSION}"
+echo
+echo "To restore the published version:"
+echo "  ./scripts/local-install.sh --undo"