worktree

A command for creating an isolated Git worktree, which is a separate working copy of a repository on its own branch.

In plain words
What is it for?
Starting a new task in a generated or custom worktree, with optional branch naming and setup for npm, pnpm, Yarn, or Python projects.
Why use it?
It lets development happen separately from the current checkout and can prepare dependencies and environment files automatically.

Command

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add commands/ruizrica/toolkit/worktree
Clone the repo
git clone --depth 1 https://github.com/ruizrica/toolkit
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 459 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.00459
Opus 5 $0.00000 $0.00230
Sonnet 5 $0.00000 $0.00092
Haiku 4.5 $0.00000 $0.00046

Measured 2d ago against content hash 1b7603e48573, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

worktree scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

docs/commands/worktree.md · 58 lines

What it actually says

/worktree

Create an isolated development worktree with automatic branch and path generation.

Usage

/worktree              # Auto-create with timestamp-based branch (wip-YYYYMMDD-HHMMSS)
/worktree [path]       # Custom path, auto-generated branch
/worktree [path] [branch]  # Custom path and branch

Commands

  • /worktree - Quick start: creates worktree with auto-generated wip-YYYYMMDD-HHMMSS branch
  • /worktree [path] [branch] - Advanced: specify custom path and branch

Both versions run setup automation:

  • Installs dependencies (npm, pnpm, yarn, or pip)
  • Copies .env.example to .env (if present)
  • Opens $EDITOR/$VISUAL when available

Why this command exists

Provides isolated development environments using git worktrees. The simple form (no args) auto-generates a timestamp-based wip branch for quick starts, while the full form allows custom naming.

Behavior

  • /worktree (no arguments):

    • Generates branch name: wip-YYYYMMDD-HHMMSS
    • Creates worktree at: .specbook/worktrees/wip-YYYYMMDD-HHMMSS
    • No interactive prompts - fully automatic
  • /worktree [path] [branch] (with arguments):

    • Uses specified path and/or branch
    • When only path provided, auto-generates branch name
    • When branch doesn't exist, creates it with git worktree add -b
    • Rolls back created worktree/branch if setup fails

Error handling

  • Not in a git repository: command fails early.
  • Bad args: usage is displayed.
  • Missing branch for default operations: falls back to fuzzy/interactive selection.

Setup automation summary format

Creating worktree: <path> (<branch>)
Environment: .env prepared (if .env.example exists)
Editor launch: attempted (if editor variables are set)

See Also

  • /setup - repository initialization + memory indexing
  • /save - merge and clean up worktree workflows
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 58 lines · 0 tokens per session scan A 1b7603e48573

Subscribe to this mod's changes

worktree is a command published in the GitHub repository ruizrica/toolkit (5 stars, last pushed 17d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 459 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.