chore: remove old car-help files, prepare new structure

tests/test_structure.sh

@@ -0,0 +1,85 @@
+#!/bin/bash
+# test_structure.sh - Verify expected repo state after task-1-clean-old-files
+# RED: Run before changes (should fail)
+# GREEN: Run after changes (should pass)
+
+REPO=/home/ken/workspace/research-workbench
+PASS=0
+FAIL=0
+
+check_absent() {
+    if [ ! -e "$REPO/$1" ]; then
+        echo "PASS: '$1' is absent"
+        ((PASS++))
+    else
+        echo "FAIL: '$1' should be absent but exists"
+        ((FAIL++))
+    fi
+}
+
+check_dir() {
+    if [ -d "$REPO/$1" ]; then
+        echo "PASS: directory '$1' exists"
+        ((PASS++))
+    else
+        echo "FAIL: directory '$1' should exist but is missing"
+        ((FAIL++))
+    fi
+}
+
+check_gitignore_line() {
+    if grep -qF "$1" "$REPO/.gitignore"; then
+        echo "PASS: .gitignore contains '$1'"
+        ((PASS++))
+    else
+        echo "FAIL: .gitignore is missing '$1'"
+        ((FAIL++))
+    fi
+}
+
+echo "=== Checking old car-help files are removed ==="
+check_absent "search.py"
+check_absent "guide.py"
+check_absent "sites.yaml"
+check_absent "app.py"
+check_absent "static"
+check_absent "results"
+check_absent "Dockerfile"
+check_absent "entrypoint.sh"
+check_absent "pyproject.toml"
+check_absent "uv.lock"
+
+echo ""
+echo "=== Checking new directories exist ==="
+check_dir "backend"
+check_dir "tests"
+check_dir "bundle/behaviors"
+check_dir "bundle/agents"
+check_dir "bundle/context"
+check_dir "frontend/src"
+check_dir "artifacts"
+check_dir "docs/plans"
+
+echo ""
+echo "=== Checking .gitignore contents ==="
+# Python
+check_gitignore_line ".venv/"
+check_gitignore_line "__pycache__/"
+check_gitignore_line "*.pyc"
+check_gitignore_line "*.egg-info/"
+# Node/Frontend
+check_gitignore_line "frontend/node_modules/"
+check_gitignore_line "frontend/dist/"
+# Runtime
+check_gitignore_line "artifacts/"
+# IDE
+check_gitignore_line ".idea/"
+check_gitignore_line ".vscode/"
+check_gitignore_line "*.swp"
+
+echo ""
+echo "=============================="
+echo "Results: $PASS passed, $FAIL failed"
+echo "=============================="
+
+[ $FAIL -eq 0 ] && exit 0 || exit 1