worktree

A command that starts coding work in an isolated Git worktree, which is a separate working directory connected to the same repository.

In plain words
What is it for?
It is for creating a branch from the remote master branch, recording the worktree location, and following the repository's worktree workflow.
Why use it?
It lets multiple sessions work in parallel without changing each other's files or branches.

Command for Claude Code

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/mock-server/mockserver-monorepo/worktree
Clone the repo
git clone --depth 1 https://github.com/mock-server/mockserver-monorepo

Made for: Claude Code.

Per session 21 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 500 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 $0.00021 $0.00500
Opus 5 $0.00010 $0.00250
Sonnet 5 $0.00004 $0.00100
Haiku 4.5 $0.00002 $0.00050

Measured 2d ago against content hash ac24dfedfbc3, 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.

.claude/commands/worktree.md · 26 lines

What it actually says

Follow the worktree workflow in .opencode/rules/worktree-workflow.md. This command does Step 1 of that flow:

  1. Ensure .worktrees/ is gitignored. If not, add .worktrees/ to .gitignore and commit that change to master first.
  2. Pick a short ID: SHORT_ID="$(date +%Y%m%d-%H%M%S)-$(uuidgen | head -c 6)".
  3. Create the worktree based on the current origin/master:
    git fetch origin master --quiet
    git worktree add --quiet -b "agent/${SHORT_ID}" ".worktrees/agent-${SHORT_ID}" origin/master
    
  4. Record the worktree path so the session can resume:
    mkdir -p .tmp && echo ".worktrees/agent-${SHORT_ID}" > .tmp/active-worktree
    
  5. Change working directory into the worktree for the rest of the session. All subsequent commands run inside the worktree.
  6. Tell the user clearly:
    • The worktree path.
    • That worktree isolation is the default for an independent session: work proceeds inside the worktree, and git status / git diff is the primary signal.
    • To merge work back to master, run /worktree-merge, which runs the 4 verification gates and the locked rebase.

If .tmp/active-worktree already exists, reuse it only if this same session created it (e.g. you are resuming after a restart) — then report that existing path instead of creating a second one. If the pointer may belong to a different concurrent session (you did not create that worktree in this session), do NOT adopt it — create a fresh worktree (new SHORT_ID) with your own branch instead, because two sessions sharing one tree overwrite each other's uncommitted work and can rebase away each other's commits. When ownership is uncertain, create a fresh worktree. See .opencode/rules/worktree-workflow.mdRule (One session, one worktree — never reuse or adopt another session's).

If the user provided additional instructions: $ARGUMENTS

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 · 26 lines · 21 tokens per session scan A ac24dfedfbc3

Subscribe to this mod's changes

worktree is a command published in the GitHub repository mock-server/mockserver-monorepo (4,961 stars, last pushed today), licensed Apache-2.0. It adds 21 tokens to every session and 500 once invoked, about $0.0001 per session on Opus 5. 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 2026-08-30.