spawn

spawn is a command for coding agents from Untrivial-ai/agent-orchestrator. It costs 0 tokens per session (451 once invoked), scanned A, original, Apache-2.0.

A command that starts a worker AI-agent session in a registered project using a fresh Git worktree, which is a separate working copy of the code. You can choose the agent type, branch, project, name, and starting prompt.

In plain words
What is it for?
Use it to start agents for coding tasks, associate them with an issue or pull request, and give them an initial assignment.
Why use it?
It lets work be delegated to another agent without mixing its file changes directly into the current working copy. The project must first be registered with ao.

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/untrivial-ai/agent-orchestrator/spawn
Clone the repo
git clone --depth 1 https://github.com/Untrivial-ai/agent-orchestrator

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for spawn

README.md
[![agentmods](https://agentmods.dev/badge/commands/untrivial-ai/agent-orchestrator/spawn.svg)](https://agentmods.dev/commands/untrivial-ai/agent-orchestrator/spawn)
Your own site
<a href="https://agentmods.dev/commands/untrivial-ai/agent-orchestrator/spawn"><img src="https://agentmods.dev/badge/commands/untrivial-ai/agent-orchestrator/spawn.svg" alt="Measured on agentmods" height="20"></a>
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 451 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 $0.00451
Opus 5 $0.00000 $0.00226
Sonnet 5 $0.00000 $0.00090
Haiku 4.5 $0.00000 $0.00045

Measured 4d ago against content hash e0fc1f4e3e60, 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 4d 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

  • spawn — 95% identical, 14 lines differ
backend/internal/skillassets/using-ao/commands/spawn.md · 39 lines

What it actually says

ao spawn

Spawn a worker agent session in a registered project. The session runs the chosen agent in a fresh git worktree. Register the project first with ao project add.

Syntax

ao spawn [flags]

Flags

Flag Meaning Default / Required
--branch string Branch for the session worktree ao/<session-id>/root
--claim-pr string Immediately claim an existing PR for the spawned session -
--harness string Agent harness to use (see list below) Project worker.agent; required if the project has none
--issue string Issue id to associate with the session -
--name string Display name shown in the sidebar (max 20 characters) Required
--no-takeover Refuse if another active session owns the claimed PR (requires --claim-pr) -
--project string Project id to spawn the session in Required
--prompt string Initial prompt for the agent -

--agent is an alias for --harness.

Available harnesses: claude-code, codex, aider, opencode, grok, droid, amp, agy, crush, cursor, qwen, copilot, goose, auggie, continue, devin, cline, kimi, kiro, kilocode, vibe, pi, autohand.

Examples

# Spawn a worker for issue 142 in the agent-orchestrator project
ao spawn --project agent-orchestrator --issue 142 --name "fix-session-leak" --prompt "Fix the session leak described in issue 142. Branch off upstream/main."
# Spawn a worker and immediately claim an open PR
ao spawn --project agent-orchestrator --name "review-pr-88" --claim-pr 88 --harness claude-code
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. 4d ago First seen · 39 lines · 0 tokens per session scan A e0fc1f4e3e60

Subscribe to this mod's changes

spawn is a command published in the GitHub repository Untrivial-ai/agent-orchestrator (10,894 stars, last pushed today), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 451 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 2026-08-30.