spawn

A command that starts another coding agent in its own Git worktree and branch. A Git worktree is a separate working folder connected to the same repository.

In plain words
What is it for?
Use it to start parallel coding tasks, such as separate frontend and backend changes, while keeping each agent's work isolated.
Why use it?
It lets another agent work on a task without changing the files or branch in your current folder. It also records the new agent's branch, folder, and task journal.

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/anshulixyz/multi-agent-loop-kit/spawn
Clone the repo
git clone --depth 1 https://github.com/anshulixyz/multi-agent-loop-kit
Per session 13 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 252 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 $0.00013 $0.00252
Opus 5 $0.00006 $0.00126
Sonnet 5 $0.00003 $0.00050
Haiku 4.5 $0.00001 $0.00025

Measured 2d ago against content hash d9eaf749ffa0, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

spawn 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.

commands/spawn.md · 24 lines

What it actually says

Spawn a new coding agent for this repo.

Run, passing the codename / slug / base-branch the user gave in $ARGUMENTS:

bash "${CLAUDE_PLUGIN_ROOT}/bin/loop-spawn" $ARGUMENTS

This creates a sibling git worktree (../<repo>-<codename>) on branch <codename>/<slug> and seeds the agent's journal at agents-status/<codename>.md. The base branch defaults to the repo's default branch.

If $ARGUMENTS is empty, ask the user for at least a codename (e.g. frontend, anvil) before running. After it succeeds, relay the worktree path and branch, and remind the user to open that path in their agent of choice and paste prompts/<codename>.md (or prompts/coding-agent.md).

(If the plugin's bin/ is on your PATH, loop-spawn <codename> [slug] is the same command.)

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 · 24 lines · 13 tokens per session scan A d9eaf749ffa0

Subscribe to this mod's changes

spawn is a command published in the GitHub repository anshulixyz/multi-agent-loop-kit (5 stars, last pushed 2mo ago), licensed MIT. It adds 13 tokens to every session and 252 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 2026-08-31.