using-git-worktrees: support bare git repos

[b0o]

I usually work in bare git repos (git init --bare/git clone --bare) and keep my worktrees in the worktree/ directory. This way, there's no need for .gitignore files, and it feels cleaner as opposed to having a worktrees/ directory nestled inside of my project. Here's an example of what it looks like:

~/test/git-worktree/bare/
├── hooks/
├── info/
├── logs/
├── objects/
├── refs/
├── rr-cache/
├── worktree/          # this is where I keep the actual worktrees that I cd into
│   ├── main/          # main branch
│   │   ├── .git
│   │   └── README.md
│   ├── foo/           # foo branch
│   │   ├── .git
│   │   ├── foo/
│   │   └── README.md
│   └── bar/           # bar branch
│       ├── .git
│       └── README.md
├── worktrees/         # this is where git keeps its metadata for the worktrees (that's why I name my worktree directory "worktree" and not "worktrees")
│   ├── main/
│   │   ├── logs/
│   │   ├── refs/
│   │   ├── COMMIT_EDITMSG
│   │   ├── commondir
│   │   ├── gitdir
│   │   ├── HEAD
│   │   ├── index
│   │   └── ORIG_HEAD
│   ├── foo/
│   │   ├── logs/
│   │   ├── refs/
│   │   ├── AUTO_MERGE
│   │   ├── commondir
│   │   ├── gitdir
│   │   ├── HEAD
│   │   ├── index
│   │   └── ORIG_HEAD
│   └── bar/
│       ├── logs/
│       ├── refs/
│       ├── AUTO_MERGE
│       ├── commondir
│       ├── gitdir
│       ├── HEAD
│       ├── index
│       └── ORIG_HEAD
├── config
├── description
└── HEAD

It would be nice if this was supported by the using-git-worktrees. For now, I'm maintaining a fork of this repo with that skill modified to suit my needs.

[obra]

How might you (or claude) improve the skill to support either? I'd love a PR for that.

[b0o]

@obra check this out and let me know what you think: https://github.com/b0o/superpowers/blob/main/skills/using-git-worktrees/SKILL.md