worktrees

Git worktree commands that refuse to lose work.

gws, gwp, gwnb, gwrot and gwh answer a question and print it. gwa, gwl, gwm and gwr land you somewhere, and each of those needs a shell function, because a binary cannot change its caller's directory.

gw takes the same commands as subcommands, each with shorthands, so gwl, gw list, gw ls and gw l are one command:

worktrees is the same program under its long name.

gws and gwp are what this tool is for and their behaviour is settled.

gwnb and gwrot are alpha and may go. They start branches rather than worktrees, which is a different job from the one this repository exists to do, and origin new-branch and origin rotate already do it. Only one of the two sets survives. Until that is decided the names, the flags and the output may change, and nothing should be built on top of them.

Two holes in git

A squash merge inverts git branch -d

A branch whose change is already in main reports error: the branch 'x' is not fully merged and points you at -D, which deletes anything. By hand, squashed and unmerged are indistinguishable: both report NOT merged, both sit one commit ahead. Opposite correct actions, no signal between them.

The probe that separates them replays the branch's tree as one commit on the merge base and asks git cherry whether that patch is already upstream. It compares content rather than history, which is what a squash preserves.

A branch that probe proves is deleted with its checkout. The delete names the sha the ref must still hold, so a commit landing between the verdict and the removal fails it rather than going with it, and the command that puts the branch back is printed before anything runs.

git worktree remove silently deletes ignored files

With .env and node_modules/ present, git status --porcelain prints nothing, git worktree remove exits 0 with no --force, and both are gone. Nothing in git brings them back: no ref ever pointed at them. gws reads --ignored=traditional, counts what would go, and marks the worktree keep until you pass --delete-ignored.

Install

uv tool install git-worktrees

One venv serves every command name, and ~/.local/bin gets a link per name. The distribution is git-worktrees because PyPI already holds worktrees; every command keeps its own name. A version installs that release and nothing later:

uv tool install git-worktrees==0.1.0

Python 3.11 or newer, and no dependencies. The standard library answers every question this asks, so an invocation pays for the interpreter and nothing else.

That is the whole install for gws, gwp, gwnb, gwrot and gwh. The four that land you somewhere need a shell function too, and every command has a completion, both of which arrive through a plugin manager.

fish

fisher install MihaiBojin/worktrees

Fisher copies functions/ and completions/ from the repository root, so the four functions and ten completions land together. Nothing has to be sourced.

zsh

Antidote takes a path: into the repository:

MihaiBojin/worktrees path:zsh/plugins/worktrees   # in zsh_plugins.txt

The plugin puts its own functions/ and completions/ on fpath and autoloads the four. Completion needs compinit, which most zsh setups already run; without one, add it after the plugin loads:

autoload -Uz compinit && compinit

What the shell code does

Each function runs command <name>, reads the one path the binary printed and cds there, and carries nothing else. gws, gwp, gwnb, gwrot and gwh change no directory, so they ship as console scripts alone and answer the same from a prompt and from a script.

The completions hold no candidate of their own. gw --complete prints every subcommand and shorthand, gwl --complete prints every worktree, and both shells narrow what those return, so the matching stays in one place and a command added to the table needs no edit in either shell.

Neither manager puts a binary on $PATH, which is why the two installs stay separate.

gws

$ gws
VERDICT  BRANCH         WHY                                                                                PATH
keep     dirty-work     it has uncommitted changes                                                         /home/you/git/.worktrees/dirty-work/repo
keep     holds-secrets  merged, but holds 2 ignored path(s); pass --delete-ignored                         /home/you/git/.worktrees/holds-secrets/repo
unknown  never-pushed   not merged into origin/main, and no upstream says whether its commits were pushed  /home/you/git/.worktrees/never-pushed/repo
remove   squash-merged  squash-merged                                                                      /home/you/git/.worktrees/squash-merged/repo

1 removable, 2 kept, 1 unclear
unclear, and gwp does not touch these: never-pushed
gwp removes the 1 marked removable

Rows come in git worktree list order. Paths are absolute wherever this prints one, so a row can be pasted into the next command. The table and the count are on stdout; the two lines after them are on stderr.

On a terminal the verdict carries its own colour, remove green, keep blue and unknown yellow, with the branch in bold and the path dimmed. That decision is made per stream: redirect it, pipe it, set NO_COLOR to anything non-empty or run under TERM=dumb and the bytes are the ones above.

Three verdicts

Each is the instruction it gives. unknown is not keep with a softer word.

Where git cannot tell, the forge is asked. A branch merged as part of a stack is that case: its changes reach the head branch across several squashes, so the intermediate state it holds differs from the final one in the same regions, and a diff cannot separate a stale branch from one with work left. A merged pull request settles it, cross-checked against the commits an upstream has not got, because a request speaks for what reached it and nothing about what never did. --no-forge decides from git alone.

A record left behind by a directory somebody deleted by hand is nobody's verdict. gws names how many there are; clearing them is git worktree prune, which mutates, so gwp is what runs it.

gwp

$ gwp
squash-merged  /home/you/git/.worktrees/squash-merged/repo
  restore with: git branch squash-merged a2b41ad1fb271bd7d84256f0d35ee5d58c29dd08
remove 1 worktree(s)? [y/N] y
removed 1 worktree(s)

It removes exactly the rows gws marks remove, under the same flags, and one function returns that set for both. What goes and what puts it back is printed before anything does, and neither --quiet nor --yes silences it. The sha in the restore line is full length, because that line is meant to be pasted.

The checkout goes through plain git worktree remove, so every refusal git makes still applies. The branch goes through git update-ref -d, naming the sha the verdict was formed against: a branch somebody committed to in between survives, and says so in git's own words. Neither branch -d, which reads history and so refuses the squash merge the probe just proved, nor branch -D, which reads nothing and is refused by the guard.

-y skips the question. A run whose stdin is not a terminal refuses rather than blocking, because an agent or a pipe reaching a prompt would hang forever holding the repository's worktrees:

$ gwp < /dev/null
squash-merged  /home/you/git/.worktrees/squash-merged/repo
  restore with: git branch squash-merged a2b41ad1fb271bd7d84256f0d35ee5d58c29dd08
not a terminal, so nothing can answer for the 1 above; pass --yes to remove them

That exits 2 and touches nothing. gwp --yes --json is what an agent runs.

With nothing to remove it prints the table gws prints, rather than the name of the command that would have printed it. The reason each worktree stayed is the answer to the question, and naming another command puts it one round trip away:

$ gwp
VERDICT  BRANCH         WHY                                                                         PATH
keep     dirty-work     it has uncommitted changes                                                  /home/you/git/.worktrees/dirty-work/repo
keep     holds-secrets  squash-merged, but holds 2 ignored path(s); pass --delete-ignored           /home/you/git/.worktrees/holds-secrets/repo
unknown  never-pushed   not merged into main, and no upstream says whether its commits were pushed  /home/you/git/.worktrees/never-pushed/repo

nothing to remove; 0 removable, 2 kept, 1 unclear

There is no --dry-run. gws reports and gwp asks, so a flag meaning "do not act" would be a no-op wearing the clothes of a safety feature, and somebody would one day cite it as the reason a sweep was safe.

gwa, gwl, gwm, gwr

Worktrees live at <PARENT>/.worktrees/<NAME>/<REPO>, derived rather than configured, so two tools cannot disagree about a location neither can be told. A branch name with slashes becomes directories, and the repository name goes last, so auth/oauth cannot collide with auth.

$ gwa fix-parser          # creates it and lands you in it
$ gwl parse               # one match takes it outright
$ gwm parser-v2           # renames the branch and moves the checkout
$ gwr                     # removes the one you are standing in

Each prints one destination on stdout and nothing else, which is what the shell function reads. gwr prints a path only when you were standing in what it removed; empty output means stay put.

gwm is the one that is not a convenience. Renaming the directory you are standing in leaves the shell with a stale $PWD and every later command failing:

$ git status
fatal: Unable to read current working directory: No such file or directory

gwl offers the main checkout too. It is where a finished branch leaves you and the one destination that is always there, so a list without it is a list of everywhere except the place you most often want. gwl main finds it whatever branch it stands on, and --list marks the one you are in:

$ gwl --list
  main           /home/you/git/repo
  dirty-work     /home/you/git/.worktrees/dirty-work/repo
  holds-secrets  /home/you/git/.worktrees/holds-secrets/repo
* never-pushed   /home/you/git/.worktrees/never-pushed/repo

It never offers that one. Picking it is the one answer that cannot take you anywhere, and a picker whose single candidate is where you already are prints nothing at all, which reads as a broken command. So two worktrees and no query is not a question, and asking for the one you are in says so and stays put:

$ gwl dirty          # standing in dirty-work
already in dirty-work

With more than one worth offering it asks, numbered:

$ gwl                # standing in the main checkout
  1  dirty-work     /home/you/git/.worktrees/dirty-work/repo
  2  holds-secrets  /home/you/git/.worktrees/holds-secrets/repo
  3  never-pushed   /home/you/git/.worktrees/never-pushed/repo
which? [1-3, or blank to cancel]

Matching is substring first and then subsequence, so tst finds add-tests, and a substring hit always outranks a loose one. Without a terminal gwl refuses at exit 3 and names --list and --json.

gwr refuses a branch that is not finished and says why, the same verdict gws prints. --force removes the checkout and keeps the branch: the worktree was in the way, the work was not.

A finished branch whose worktree holds ignored files is refused too, and named as finished, because it is:

$ gwr holds-secrets
holds-secrets is finished: squash-merged, but holds 2 ignored path(s); pass --delete-ignored

--force is not the answer to that one. It deletes those files just the same, since git worktree remove takes the whole directory, and it keeps a branch whose work already landed. Every ignored path is named before anything is deleted, under --delete-ignored and under --force alike.

gwnb and gwrot (alpha)

Both are alpha and both start branches rather than worktrees. See the note under the command table.

$ gwnb fix-parser
fix-parser from origin/main at 4a91c02

The base is <remote>/<head> as it stands after the fetch, not the local copy of it, so the branch starts on top of what the server has and nothing has to be rebased afterwards. It travels as a full ref, because git resolves a bare name as a tag first and a repository holding a tag called origin/main would branch from the tag. --no-track, so the head branch does not become the new branch's upstream and git push does not target it. A failed fetch is not fatal: an offline machine still gets a branch, off whatever it last saw, and the line at the end names the commit it got.

gwrot takes no argument. The name comes from the branch you are standing on, with any suffix a previous rotation added already stripped, so four rotations in a day give four siblings rather than one name carrying four suffixes:

fix-parser                   -> fix-parser-2026-09-11_001
fix-parser-2026-09-11_001    -> fix-parser-2026-09-11_002
fix-parser-2026-09-10_003    -> fix-parser-2026-09-11_001

Three digits, so the sequence cannot be read as another field of the date. A number is free only when neither refs/heads/ nor the remote holds it, or two people rotate into the same name.

On the head branch there is no chain to continue, so it catches that up instead:

$ gwrot
main is at origin/main

That is merge --ff-only, never a rebase: rewriting local commits on the head branch is the class this tooling refuses everywhere else. Commits the remote does not have are refused and listed, because they are a change of their own and gwnb puts them on a branch.

gwh

$ gwh
worktrees 0.2.0: git worktree commands that refuse to lose work

COMMAND          GW                       DOES
gws              gw status (s, st)        which worktrees are finished, and why
gwp              gw prune (p)             remove the ones status marks removable
gwa NAME [BASE]  gw add (a)               create a worktree and land you in it
gwl [QUERY]      gw list (l, ls)          pick a worktree and land you in it
gwm NEW          gw move (m, mv)          rename this branch and move it
gwr [QUERY]      gw remove (rm)           remove one whose branch is finished
gwnb NAME        gw new-branch (nb, new)  branch off the head branch (alpha)
gwrot            gw rotate (rot)          the next branch in a series (alpha)
gwh              gw help (h)              every command and alias, this list

gw help, gw h and gw with no subcommand print the same thing. One table in cli.py carries the names, so what gwh prints and what gw accepts cannot disagree, and it raises at import if two commands ever claim one name.

Flags

Every command takes --version. All but gwh, which prints a table and has nothing to be quiet about, also take --json, -q, -v and --explain. Beyond those:

gw <command> --help prints one command's own list.

Data goes to stdout and diagnostics to stderr, the prompt included, so --json is parseable in every mode. Colour is decided per stream and only for a terminal, so a redirect, a pipe, a non-empty NO_COLOR or TERM=dumb give the bytes a pipe would have got, --json included. NO_COLOR= is not a request to turn it off, which is the no-color.org rule.

Every command is a console script, so a script reaches it with no shell loaded at all:

$ gws --json | jq -r '.verdicts[] | select(.ignored > 0) | .branch'
holds-secrets

$ gws --json | jq -r '.verdicts[] | select(.verdict=="remove") | .branch'
squash-merged

$ fish -c 'gws --json' | jq '.verdicts | length'
4

$ bash -c 'gwnb spike --json' | jq -r .base
refs/remotes/origin/main

What it refuses

These git commands are refused wherever they appear, whatever flags are passed and whatever a caller asks for:

reset --hard      a forced checkout or switch      clean -f
push --force      worktree remove --force          branch -D

The check runs on the argument list as it is about to be handed to git, so no code path can assemble its way past one. gws --explain prints every git command the program can issue, marking the ones that take the repository's shared refs and therefore run serially.

--force-with-lease is not --force and is allowed, and so is update-ref -d <ref> <sha>, which is how a branch is deleted here: against the sha the verdict was formed on, or not at all. The sha has to be a full object name. An absent one, an empty one, an abbreviation and a name like HEAD are all refused, because git reads the empty string as "no old value" and takes the branch at exit 0, which is branch -D spelled longer. update-ref --stdin is refused with them: it deletes refs without -d appearing at all.

Contributing

The Python, the tests and the release procedure are in docs/DEVELOPMENT.md. The rules the code follows are in AGENTS.md. What changed in each release is in CHANGELOG.md.

Licence

Apache-2.0, Mihai Bojin. See LICENSE.