Archipelago — open-source initial import

2026-08-12 10:55:49 +00:00
commit e3bcd9fca9
2056 changed files with 468069 additions and 0 deletions
@@ -0,0 +1,71 @@
+#!/usr/bin/env bash
+# PreToolUse Bash guard: block dangerous shell commands.
+# Denies: rm -rf, git reset --hard, git push -f, git clean -fd, chmod -R 777,
+# fork bombs, block device overwrites, mkfs, paths escaping project root.
+# Uses python3 instead of jq for JSON (guaranteed on macOS).
+set -euo pipefail
+
+INPUT=$(cat)
+CMD=$(python3 -c "
+import json, sys
+try:
+    data = json.loads(sys.stdin.read())
+    print(data.get('tool_input', {}).get('command', ''))
+except: pass
+" <<< "$INPUT")
+BASE="${CLAUDE_PROJECT_DIR:-}"
+[[ -z "$BASE" ]] && BASE=$(python3 -c "
+import json, sys
+try:
+    data = json.loads(sys.stdin.read())
+    print(data.get('cwd', ''))
+except: pass
+" <<< "$INPUT")
+[[ -z "$BASE" ]] && BASE="$(pwd)"
+
+# Normalize: collapse whitespace, strip leading/trailing
+CMD_NORM=$(echo "$CMD" | tr -s '[:space:]' ' ' | sed 's/^[[:space:]]*//;s/[[:space:]]*$//')
+
+deny() {
+  local reason="$1"
+  python3 -c "
+import json
+print(json.dumps({
+    'hookSpecificOutput': {
+        'hookEventName': 'PreToolUse',
+        'permissionDecision': 'deny',
+        'permissionDecisionReason': '$reason'
+    }
+}))
+"
+  exit 0
+}
+
+# Dangerous patterns (case-insensitive where sensible)
+case "$CMD_NORM" in
+  *"rm -rf"*|*"rm -fr"*|*"rm -f -r"*|*"rm -r -f"*)  deny "Destructive rm -rf blocked by security hook" ;;
+  *"git reset --hard"*)                               deny "git reset --hard would lose uncommitted work" ;;
+  *"git push --force"*|*"git push -f"*|*"git push -f "*) deny "git push --force would rewrite history" ;;
+  *"git clean -fd"*|*"git clean -f -d"*)             deny "git clean -fd deletes untracked files" ;;
+  *"chmod -R 777"*|*"chmod -R 0777"*)                deny "chmod -R 777 is a security risk" ;;
+  *":(){ :"*"};:"*)                                   deny "Fork bomb pattern blocked" ;;
+  *"> /dev/sd"*|*">/dev/sd"*)                        deny "Block device overwrite blocked" ;;
+  *"mkfs "*|*"mkfs."*)                               deny "Disk format command blocked" ;;
+esac
+
+# Check for path traversal escaping project root (../ outside project)
+# Only if we have a sensible base
+if [[ -n "$BASE" ]] && [[ -d "$BASE" ]]; then
+  # Simple heuristic: command contains .. and would resolve outside project
+  if echo "$CMD_NORM" | grep -qE '\.\./|/\.\.'; then
+    # Extract plausible paths and check - allow ../ within project
+    if echo "$CMD_NORM" | grep -qE '(rm|mv|cp|cat|chmod|chown)\s+.*\.\.'; then
+      # Could be risky; be conservative for rm/mv/cp
+      if echo "$CMD_NORM" | grep -qE '\brm\b.*\.\.'; then
+        deny "Path traversal with rm blocked"
+      fi
+    fi
+  fi
+fi
+
+exit 0