1 files changed, 126 insertions, 0 deletions
diff --git a/scripts/lint.sh b/scripts/lint.sh
new file mode 100755
index 0000000..ae30aa5
--- /dev/null
+++ b/scripts/lint.sh
@@ -0,0 +1,126 @@
+#!/usr/bin/env bash
+# Validate ruleset structure. Runs from the rulesets repo root.
+# Checks:
+#   - Every .md rule file starts with a top-level heading
+#   - Every rule file has an 'Applies to:' header
+#   - Every language CLAUDE.md has a top-level heading
+#   - Every hook script has a shebang and is executable
+#   - Every cross-reference to claude-rules/ from a SKILL.md or
+#     claude-rules/*.md resolves to a real file (catches the install-layout
+#     drift that the bridge symlink fixes)
+
+set -u
+
+REPO_ROOT="$(cd "$(dirname "$0")/.." && pwd)"
+cd "$REPO_ROOT"
+
+errors=0
+
+warn() {
+  printf '  WARN: %s\n' "$1"
+  errors=$((errors + 1))
+}
+
+check_md_heading() {
+  local f="$1"
+  [ -f "$f" ] || return 0
+  if ! head -1 "$f" | grep -q '^# '; then
+    warn "$f — missing top-level heading"
+  fi
+}
+
+check_md_applies_to() {
+  local f="$1"
+  [ -f "$f" ] || return 0
+  if ! grep -q '^Applies to:' "$f"; then
+    warn "$f — missing 'Applies to:' header"
+  fi
+}
+
+check_hook() {
+  local f="$1"
+  [ -f "$f" ] || return 0
+  if ! head -1 "$f" | grep -q '^#!'; then
+    warn "$f — missing shebang"
+  fi
+  if [ ! -x "$f" ]; then
+    warn "$f — not executable (chmod +x)"
+  fi
+}
+
+check_md_links() {
+  # Validate cross-references to claude-rules/ — the install-layout problem
+  # solved by the bridge symlink in `make install`. Doesn't validate
+  # example file names that skills cite illustratively (e.g. ADR templates,
+  # arc42 section files), which are intentionally not real source files.
+  local f="$1"
+  [ -f "$f" ] || return 0
+  local dir
+  dir="$(dirname "$f")"
+  while IFS= read -r link; do
+    local url="${link##*\(}"
+    url="${url%\)}"
+    case "$url" in
+      *claude-rules/*) ;;
+      *) continue ;;
+    esac
+    url="${url%%#*}"
+    url="${url%%\?*}"
+    local resolved
+    resolved="$(cd "$dir" 2>/dev/null && readlink -m "$url" 2>/dev/null)"
+    if [ -z "$resolved" ] || [ ! -e "$resolved" ]; then
+      warn "$f — broken claude-rules link: $url"
+    fi
+  done < <(grep -oE '\[[^]]*\]\([^)]+\)' "$f" 2>/dev/null || true)
+}
+
+echo "Linting rulesets in $REPO_ROOT"
+
+# Generic rules
+for f in claude-rules/*.md; do
+  [ -f "$f" ] || continue
+  check_md_heading "$f"
+  check_md_applies_to "$f"
+done
+
+# Per-language rule files
+for rules_dir in languages/*/claude/rules; do
+  [ -d "$rules_dir" ] || continue
+  for f in "$rules_dir"/*.md; do
+    [ -f "$f" ] || continue
+    check_md_heading "$f"
+    check_md_applies_to "$f"
+  done
+done
+
+# Per-language CLAUDE.md templates
+for claude_md in languages/*/CLAUDE.md; do
+  [ -f "$claude_md" ] || continue
+  check_md_heading "$claude_md"
+done
+
+# Hook scripts
+for h in languages/*/claude/hooks/*.sh languages/*/githooks/*; do
+  [ -f "$h" ] || continue
+  check_hook "$h"
+done
+
+# Shared install/diff/lint scripts (sanity check)
+for s in scripts/*.sh; do
+  [ -f "$s" ] || continue
+  check_hook "$s"
+done
+
+# Markdown link validation across rules and skills
+for f in claude-rules/*.md */SKILL.md; do
+  [ -f "$f" ] || continue
+  check_md_links "$f"
+done
+
+echo "---"
+if [ "$errors" -eq 0 ]; then
+  echo "All checks passed."
+else
+  echo "$errors warning(s)."
+  exit 1
+fi