dotfiles: add beets, sync-music script, firstmate, ngrok, openssh, gh/tmux/treehouse/opencode/pi brews

rebuild.sh

@@ -1,5 +1,44 @@
 #!/usr/bin/env bash
+# Rebuild nix-darwin + home-manager. Rotates stale home-manager *.backup files
+# so a second switch never fails with "would be clobbered".
 set -euo pipefail
 DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd -P)"
 ln -sfn "$DIR" ~/.dotfiles
+
+stamp="$(date +%Y%m%d-%H%M%S)"
+# Paths home-manager manages via home.file (regular files become out-of-store symlinks).
+managed=(
+  "$HOME/.grok/config.toml"
+  "$HOME/.grok/AGENTS.md"
+  "$HOME/.claude/settings.json"
+  "$HOME/.claude/CLAUDE.md"
+  "$HOME/.codex/AGENTS.md"
+  "$HOME/.config/opencode/AGENTS.md"
+  "$HOME/.pi/agent/settings.json"
+  "$HOME/.pi/agent/models.json"
+  "$HOME/.pi/agent/AGENTS.md"
+  "$HOME/.pi/agent/extensions/terminal-status-title.js"
+)
+for path in "${managed[@]}"; do
+  bak="${path}.backup"
+  if [ -e "$bak" ] || [ -L "$bak" ]; then
+    mv "$bak" "${bak}.${stamp}"
+    echo "rotated stale backup: ${bak} -> ${bak}.${stamp}"
+  fi
+done
+# Directory targets use the same backup suffix on collision.
+for path in \
+  "$HOME/.config/wezterm" \
+  "$HOME/.config/nvim" \
+  "$HOME/.config/herdr" \
+  "$HOME/.pi/agent/themes" \
+  "$HOME/.pi/agent/extensions/calm"
+do
+  bak="${path}.backup"
+  if [ -e "$bak" ] || [ -L "$bak" ]; then
+    mv "$bak" "${bak}.${stamp}"
+    echo "rotated stale backup: ${bak} -> ${bak}.${stamp}"
+  fi
+done
+
 exec sudo darwin-rebuild switch --flake ~/.dotfiles#lt-mbp