Scaffold: agent starter kit (seeded from Ebb)

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

tools/git-hooks/pre-commit

@@ -0,0 +1,28 @@
+#!/bin/sh
+# Kvitt pre-commit hook: the fast subset of `./gradlew check`. Installed by tools/install-git-hooks.sh.
+set -e
+top=$(git rev-parse --show-toplevel)
+
+# Secrets and personal data never reach git. Adjust the list to this project (see CLAUDE.md › Never commit).
+bad=$(git -C "$top" ls-files --cached -- local.properties '*.jks' '*.keystore' '*.p12' '*.aar' 'models/' 'export/' | head -5)
+if [ -n "$bad" ]; then
+  echo "pre-commit: a secret, keystore, vendor binary or personal-data file is staged or tracked:" >&2
+  echo "$bad" >&2
+  echo "Unstage with: git rm --cached <file>" >&2
+  exit 1
+fi
+
+[ -x "$top/gradlew" ] || exit 0
+
+# The build runs on the pinned JDK (gradle.properties); the shell's default java may be newer or a macOS stub.
+case "$("${JAVA_HOME:+$JAVA_HOME/bin/}java" -version 2>&1 | head -1)" in
+  *\"25*) ;;
+  *) [ -d /opt/homebrew/opt/openjdk@25 ] && export JAVA_HOME=/opt/homebrew/opt/openjdk@25/libexec/openjdk.jdk/Contents/Home ;;
+esac
+
+cd "$top"
+# Replace with this project's fast checks (architecture rules, the pure-module tests). Keep it under a minute.
+./gradlew --quiet :core:model:test || {
+  echo "pre-commit: fast tests failed (see above). Run ./gradlew check for the full picture." >&2
+  exit 1
+}