#!/usr/bin/env bash

set -euo pipefail

# SuperAntigravity — Superpowers + SuperClaude for Google Antigravity

# https://github.com/derHaken/SuperAntigravity

REPO_URL="https://github.com/derHaken/SuperAntigravity"

BRANCH="main"

SKILLS_DIR="$HOME/.gemini/antigravity/skills"

WORKFLOWS_DIR="$HOME/.gemini/antigravity/global_workflows"

AGENTS_DIR="$HOME/.gemini/antigravity/agents"

GEMINI_DIR="$HOME/.gemini"

GEMINI_FILE="$GEMINI_DIR/GEMINI.md"

LIFTOFF_MARKER="# SuperAntigravity Skills"

GREEN='\033[0;32m'

YELLOW='\033[1;33m'

RED='\033[0;31m'

NC='\033[0m'

log() { echo -e "${GREEN}[superantigravity]${NC} $1"; }

warn() { echo -e "${YELLOW}[superantigravity]${NC} $1"; }

error() { echo -e "${RED}[superantigravity]${NC} $1" >&2; exit 1; }

# Check for partial install

if [ -f "$HOME/.gemini/antigravity/.superantigravity-installed" ]; then

warn "Previous install detected. Re-running will overwrite existing skills/workflows/agents."

fi

command -v git >/dev/null 2>&1 || error "git is required but not installed"

log "Installing SuperAntigravity..."

TMPDIR=$(mktemp -d)

trap "rm -rf $TMPDIR" EXIT

log "Downloading..."

git clone --depth 1 --branch "$BRANCH" "$REPO_URL" "$TMPDIR/superantigravity" 2>/dev/null \

|| error "Failed to clone. Check your internet connection and try again."

mkdir -p "$SKILLS_DIR" "$WORKFLOWS_DIR" "$AGENTS_DIR" "$GEMINI_DIR"

log "Installing skills..."

for skill_dir in "$TMPDIR/superantigravity/skills"/*/; do

skill_name=$(basename "$skill_dir")

if [ -f "$skill_dir/SKILL.md" ]; then

mkdir -p "$SKILLS_DIR/$skill_name"

cp -r "$skill_dir"/* "$SKILLS_DIR/$skill_name/"

echo " ✓ $skill_name"

fi

done

log "Installing workflows..."

for wf in "$TMPDIR/superantigravity/workflows"/*.md; do

name=$(basename "$wf")

cp "$wf" "$WORKFLOWS_DIR/$name"

echo " ✓ ${name%.md}"

done

log "Installing agents..."

for agent in "$TMPDIR/superantigravity/agents"/*.md; do

name=$(basename "$agent")

cp "$agent" "$AGENTS_DIR/$name"

echo " ✓ ${name%.md}"

done

log "Updating ~/.gemini/GEMINI.md..."

if [ -f "$GEMINI_FILE" ] && grep -q "$LIFTOFF_MARKER" "$GEMINI_FILE"; then

warn "SuperAntigravity block already in GEMINI.md — skipping (run uninstall.sh first to reinstall)"

else

[ -s "$GEMINI_FILE" ] && printf '\n\n' >> "$GEMINI_FILE"

cat "$TMPDIR/superantigravity/rules/GEMINI.md" >> "$GEMINI_FILE"

log "Bootstrap rules added"

fi

echo ""

echo -e "${GREEN}✓ SuperAntigravity installed!${NC}"

echo ""

echo " 19 skills → $SKILLS_DIR"

echo " 16 workflows → $WORKFLOWS_DIR"

echo " 6 agents → $AGENTS_DIR"

echo ""

echo "Restart Antigravity and type /brainstorm to get started."

echo ""

# Write manifest only on complete successful install

MANIFEST_FILE="$HOME/.gemini/antigravity/.superantigravity-installed"

echo "superantigravity-version=1.0.0" > "$MANIFEST_FILE"

echo "install-date=$(date -u +%Y-%m-%dT%H:%M:%SZ)" >> "$MANIFEST_FILE"