Scaffold: agent starter kit (seeded from Ebb)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tools/install-git-hooks.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+# Installs the Kvitt pre-commit hook into this repository's hooks folder (shared by all worktrees).
+# The hook guards itself: on branches without the app build it only runs the export/ check.
+set -euo pipefail
+here="$(cd "$(dirname "$0")" && pwd)"
+hooks="$(git -C "$here" rev-parse --path-format=absolute --git-common-dir)/hooks"
+target="$hooks/pre-commit"
+if [[ -e "$target" ]] && ! cmp -s "$here/git-hooks/pre-commit" "$target"; then
+  echo "A different pre-commit hook already exists at $target; not overwriting. Merge them by hand." >&2
+  exit 1
+fi
+mkdir -p "$hooks"
+cp "$here/git-hooks/pre-commit" "$target"
+chmod +x "$target"
+echo "Installed $target"