ccc-spawn

ccc-spawn is a skill for Claude Code from KevinZai/commander. It costs 72 tokens per session (1,488 once invoked), scanned A, original, MIT.

A session-spawning hub for moving a separate task into its own Claude session, either individually, in parallel, or as a hand-off chain.

In plain words
What is it for?
It helps isolate self-contained work, split tasks across files, run parallel work, or pass work from specification to implementation to review.
Why use it?
It keeps independent work from cluttering the current conversation and supports fresh context for separate tasks.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: mentions subagents; names the AskUserQuestion tool; runs codex exec.

Good fit It helps isolate self-contained work, split tasks across files, run parallel work, or pass work from specification to implementation to review.

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Install with agentmods
npx agentmods add skills/kevinzai/commander/ccc-spawn
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.

Any agent
npx skills add KevinZai/commander --skill ccc-spawn
Clone the repo
git clone --depth 1 https://github.com/KevinZai/commander

Made for: Claude Code.

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 ccc-spawn

README.md
[![agentmods](https://agentmods.dev/badge/skills/kevinzai/commander/ccc-spawn/github.svg)](https://agentmods.dev/skills/kevinzai/commander/ccc-spawn)
Your own site
<a href="https://agentmods.dev/skills/kevinzai/commander/ccc-spawn"><img src="https://agentmods.dev/badge/skills/kevinzai/commander/ccc-spawn/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for ccc-spawn

Your own site · 80×15
<a href="https://agentmods.dev/skills/kevinzai/commander/ccc-spawn"><img src="https://agentmods.dev/badge/skills/kevinzai/commander/ccc-spawn.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 72 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,488 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 5.1 $0.00072 $0.01488
Opus 5.5 $0.00029 $0.00595
Sonnet 5.5 $0.00014 $0.00298
Haiku 4.5 $0.00007 $0.00149

Measured yesterday against content hash f00e8d1838b8, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

ccc-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 yesterday.

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.

commander/cowork-plugin-codex/skills/ccc-spawn/SKILL.md · 113 lines

How it starts

The opening of the file, as written. The whole thing — 113 lines — stays where its author put it; the contents beside it link to each section on GitHub.

$ccc-spawn — spawn hub

CC Commander · $ccc-spawn · one entry point that sends a self-contained task to the right spawn mechanism for this surface.

The on-demand counterpart of the automatic isolation nudge (suggest-ticker). This hub offers; nothing spawns without the user's confirmation.

When to use / when not to

  • Use for "do this separately so it does not derail here", "fan this out", "chain spec → build → review", or "get an independent expert pass".
  • Do not use for trivial work that belongs in this thread, or when two spawns would edit the same files (merge them into one task or sequence them).
  • The automatic nudge already runs every turn; this skill is the manual version.

What happens

1. Pick what to spawn

A sub-command skips this picker. Otherwise call AskUserQuestion (Codex: the same question in plain text), best fit first with 🟢:

question: "What do you want to spawn?"
header: "Spawn"
multiSelect: false
options:
  - label: "🟢 Isolated task"
    description: "One self-contained task with fresh context; this thread keeps going."
  - label: "🚀 Parallel fleet"
    description: "Fan out across independent files or units at once (hands off to $ccc-fleet)."
  - label: "🔄 Cross-session relay"
    description: "Chain spec → build → review as hand-off sessions (ask the user to type $ccc-relay)."
  - label: "🔬 Expert pass"
    description: "One independent reviewer (security, performance, design, …) prompted to refute."

2. Choose the mechanism for the surface

Choice Mechanism
Isolated task, result needed in this conversation Agent tool: subagent_type: "fleet-worker" (or general-purpose), run_in_background: true, effort sized to the brief (low mechanical, medium typical, high hard). Add isolation: "worktree" only when the task writes files while this session keeps editing; a read-only task runs without it.
Isolated task as its own session Claude Desktop (Cowork): emit a spawn_task chip, [🟢 Spawn as separate session]. CLI with the opt-in claude-peers broker: /spawn quick <task>. Codex: codex exec --json or codex cloud exec.
Parallel fleet Invoke $ccc-fleet with the Skill tool, passing the task.
Cross-session relay Tell the user to type $ccc-relay with the chain (user-invoked only).
Expert pass Agent tool, read-only, no isolation: subagent_type security-auditor, performance-engineer, designer, reviewer or another matching plugin agent; effort: "high"; prompt it to refute, not confirm. As a separate session: Cowork spawn_task chip scoped to that reviewer, or CLI /spawn expert <domain>.

Read the full file on GitHub · 113 lines

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. yesterday Changed · -1 lines f00e8d1838b8
  2. 14d ago Changed · +33 lines · +24 tokens per session 36c3f3b48b3e
  3. 1mo ago First seen · 81 lines · 48 tokens per session scan A 1fad76e2560f

Subscribe to this mod's changes

ccc-spawn is a skill published in the GitHub repository KevinZai/commander (6 stars, last pushed today), licensed MIT. It adds 72 tokens to every session and 1,488 once invoked, about $0.0003 per session on Opus 5.5. 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 2026-09-03.

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