Fast and Ligtweight CoW-backed git worktree sessions . Linux uses OverlayFS, macOS uses APFS clonefile(2).
disk used (GiB) — k same-tree worktrees of the Linux kernel (1.77 GiB, 93k files)
18 | ● git worktree add (O(N))
| ●
15 | /
| /
12 | /
| /
9 | ●
| /
6 | /
| /
3 | ●
| ● · · · · ● gh wt add (≈const)
0 ●─────●─────────●─────────────────────●─────────●─────────●
0 1 2 5 10 15 20 k (# worktrees)
At k = 10 worktrees gh-wt uses ~8× less disk; at k = 20, ~13×.
Full methodology and raw data: docs/benchmark.md.
gh extension install HikaruEgashira/gh-wt$ gh wt --help
Usage:
gh wt list ... List worktrees
gh wt add <branch> [path] ... Add a worktree
gh wt remove ... Remove a worktree (interactive)
gh wt gc ... Delete unreferenced cache entries
gh wt *your_command* ... Search via fzf and run the command# Create a worktree for a branch
gh wt add feature-branch
# Remove a worktree (interactive)
gh wt remove
# Open a worktree in VS Code
gh wt code
# Run a command inside a selected worktree
gh wt -- claude- GitHub CLI
- fzf
- Linux (kernel 5.11+) or macOS (APFS)
- gh-q - ghq-like repository management for GitHub CLI
