Preamble

_BRANCH=$(git branch --show-current 2>/dev/null || echo "unknown")
_BASE=$(git symbolic-ref refs/remotes/origin/HEAD 2>/dev/null | sed 's|refs/remotes/origin/||')
[ -z "$_BASE" ] && git rev-parse --verify origin/main >/dev/null 2>&1 && _BASE="main"
_BASE="${_BASE:-main}"
echo "BRANCH: $_BRANCH"
echo "BASE: $_BASE"
[ "$_BRANCH" = "$_BASE" ] && echo "ON_BASE=true" || echo "ON_BASE=false"
[ -f Gemfile ] && echo "STACK:ruby"
[ -f package.json ] && echo "STACK:node"
( [ -f requirements.txt ] || [ -f pyproject.toml ] ) && echo "STACK:python"
[ -f go.mod ] && echo "STACK:go"
ls jest.config.* vitest.config.* playwright.config.* cypress.config.* .rspec pytest.ini 2>/dev/null
ls -d test/ tests/ spec/ __tests__/ e2e/ 2>/dev/null
[ -f delivery-plan.md ] && echo "DELIVERY_PLAN: exists" || echo "DELIVERY_PLAN: missing"
[ -f delivery-plan.md ] && head -20 delivery-plan.md
test-and-fix

Preamble
