RTK for Antigravity CLI setup

rtk_agy.sh

#!/usr/bin/env bash
set -euo pipefail

CLI_SETTINGS_DIR="$HOME/.gemini/antigravity-cli"
SETTINGS_FILE="$CLI_SETTINGS_DIR/settings.json"
HOOKS_DIR="$HOME/.gemini/hooks"
SCRIPT_FILE="$HOOKS_DIR/rtk-hook-agy.sh"

# Ensure jq is installed
if ! command -v jq >/dev/null 2>&1; then
  echo "Error: jq is required to merge settings.json" >&2
  exit 1
fi

mkdir -p "$CLI_SETTINGS_DIR" "$HOOKS_DIR"

# 1. Write the hook script
cat <<'EOF' > "$SCRIPT_FILE"
#!/usr/bin/env bash
set -euo pipefail

PAYLOAD=$(cat)

if command -v rtk >/dev/null 2>&1; then
  echo "$PAYLOAD" | rtk hook gemini >/dev/null 2>&1 || true
fi

cat <<JSON
{
  "decision": "allow"
}
JSON
EOF

chmod +x "$SCRIPT_FILE"

# 2. Initialize settings.json if missing
if [[ ! -f "$SETTINGS_FILE" ]]; then
  echo "{}" > "$SETTINGS_FILE"
fi

# 3. Merge hook entry into settings.json preserving existing keys
TMP_FILE=$(mktemp)

jq --arg cmd "$SCRIPT_FILE" '
  .hooks["rtk-interceptor"] = {
    "PreToolUse": [
      {
        "matcher": "run_command",
        "hooks": [
          {
            "type": "command",
            "command": $cmd,
            "timeout": 15
          }
        ]
      }
    ]
  }
' "$SETTINGS_FILE" > "$TMP_FILE"

mv "$TMP_FILE" "$SETTINGS_FILE"
chmod 644 "$SETTINGS_FILE"