#!/usr/bin/env bash

set -e

SKILL_DIR="$HOME/.claude/skills/cmux"

REPO="https://github.com/jhta/cmux-skill"

echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"

echo " cmux skill installer for Claude Code"

echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"

# ── Homebrew ──────────────────────────────────────────────────────────────────

if ! command -v brew &>/dev/null; then

echo "⚠️ Homebrew not found. Install it first: https://brew.sh"

exit 1

fi

# ── Neovim ────────────────────────────────────────────────────────────────────

if ! command -v nvim &>/dev/null; then

echo "→ Installing Neovim..."

brew install neovim

else

echo "✓ Neovim $(nvim --version | head -1 | awk '{print $2}')"

fi

# ── delta ─────────────────────────────────────────────────────────────────────

if ! command -v delta &>/dev/null; then

echo "→ Installing delta..."

brew install git-delta

else

echo "✓ delta $(delta --version | awk '{print $2}')"

fi

# ── cmux CLI symlink ──────────────────────────────────────────────────────────

CMUX_BIN="/Applications/cmux.app/Contents/Resources/bin/cmux"

if [[ -f "$CMUX_BIN" ]]; then

if [[ ! -f /usr/local/bin/cmux ]]; then

echo "→ Symlinking cmux CLI..."

sudo ln -sf "$CMUX_BIN" /usr/local/bin/cmux

else

echo "✓ cmux CLI already symlinked"

fi

else

echo "⚠️ cmux.app not found in /Applications — skipping CLI symlink."

echo " Download cmux at https://www.cmux.dev/ then re-run this script."

fi

# ── Clone skill ───────────────────────────────────────────────────────────────

if [[ -d "$SKILL_DIR/.git" ]]; then

echo "→ Updating existing skill..."

git -C "$SKILL_DIR" pull --ff-only

elif [[ -d "$SKILL_DIR" ]]; then

echo "⚠️ $SKILL_DIR exists but is not a git repo — skipping clone."

else

echo "→ Installing skill to $SKILL_DIR..."

mkdir -p "$(dirname "$SKILL_DIR")"

git clone "$REPO" "$SKILL_DIR"

fi

# ── Shell helpers (zshrc / bashrc) ────────────────────────────────────────────

SOURCE_LINE="source \$HOME/.claude/skills/cmux/scripts/cmux-helpers.sh"

SHELL_RC=""

if [[ "$SHELL" == */zsh ]]; then

SHELL_RC="$HOME/.zshrc"

elif [[ "$SHELL" == */bash ]]; then

SHELL_RC="$HOME/.bashrc"

fi

if [[ -n "$SHELL_RC" ]]; then

if grep -qF "cmux-helpers.sh" "$SHELL_RC" 2>/dev/null; then

echo "✓ Shell helpers already sourced in $SHELL_RC"

else

echo "→ Adding helpers to $SHELL_RC..."

echo "" >> "$SHELL_RC"

echo "# cmux skill helpers" >> "$SHELL_RC"

echo "$SOURCE_LINE" >> "$SHELL_RC"

fi

else

echo "⚠️ Unknown shell — add this manually to your rc file:"

echo " $SOURCE_LINE"

fi

# ── Claude Code hooks ─────────────────────────────────────────────────────────

HOOKS_DIR="$HOME/.claude/hooks"

SETTINGS="$HOME/.claude/settings.json"

mkdir -p "$HOOKS_DIR"

setup_hook() {

local name="$1" # e.g. stop

local event="$2" # e.g. Stop

local hook_file="$HOOKS_DIR/cmux-${name}.sh"

if [[ -f "$hook_file" ]]; then

echo "✓ Hook $event already exists"

return

fi

cat > "$hook_file" <<HOOKEOF

#!/usr/bin/env bash

if [[ -S "\${CMUX_SOCKET_PATH:-/tmp/cmux.sock}" ]]; then

cat | cmux claude-hook ${name} > /dev/null 2>&1 &

fi

exit 0

HOOKEOF

chmod +x "$hook_file"

# Inject into settings.json if not already present

if command -v jq &>/dev/null; then

if [[ ! -f "$SETTINGS" ]]; then

echo '{}' > "$SETTINGS"

fi

if ! jq -e ".hooks.${event}" "$SETTINGS" &>/dev/null; then

tmp=$(mktemp)

jq ".hooks.${event} = [{\"matcher\": \"*\", \"hooks\": [{\"type\": \"command\", \"command\": \"${hook_file}\"}]}]" \

"$SETTINGS" > "$tmp" && mv "$tmp" "$SETTINGS"

echo "→ Registered $event hook in settings.json"

else

echo "⚠️ $event hook already in settings.json — add manually if needed:"

echo " $hook_file"

fi

else

echo "⚠️ jq not found — add hook manually to ~/.claude/settings.json:"

echo " $hook_file"

fi

}

setup_hook "stop" "Stop"

setup_hook "session-start" "SessionStart"

setup_hook "notification" "Notification"

# ── Git delta config ──────────────────────────────────────────────────────────

echo "→ Configuring git to use delta..."

git config --global core.pager delta

git config --global interactive.diffFilter "delta --color-only"

git config --global delta.navigate true

git config --global delta.dark true

git config --global delta.side-by-side true

git config --global delta.line-numbers true

git config --global merge.conflictstyle diff3

git config --global diff.colorMoved default

echo "✓ Git delta config applied"

# ── Done ──────────────────────────────────────────────────────────────────────

echo ""

echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"

echo " ✅ Done! Run Claude Code inside cmux and"

echo " say things like:"

echo " • \"open the code\""

echo " • \"show me the diff\""

echo " • \"run the tests in a new pane\""

echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"