decompose

decompose is a skill for Claude Code, Codex from arbiterForge/codeArbiter. It costs 104 tokens per session (4,733 once invoked), scanned A, original, AGPL-3.0.

A guided interview for planning a new software project before source code exists. It records the answers in project context files so the design survives interruptions.

In plain words
What is it for?
Use it to define a greenfield project across six planning layers and create its initial project context.
Why use it?
It turns an empty starting point into a documented plan instead of relying on information held only in a conversation.

Skill for Claude CodeCodex

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 skills/arbiterforge/codearbiter/decompose
Any agent
npx skills add arbiterForge/codeArbiter --skill decompose
Clone the repo
git clone --depth 1 https://github.com/arbiterForge/codeArbiter

Made for: Claude Code, Codex.

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 decompose

README.md
[![agentmods](https://agentmods.dev/badge/skills/arbiterforge/codearbiter/decompose.svg)](https://agentmods.dev/skills/arbiterforge/codearbiter/decompose)
Your own site
<a href="https://agentmods.dev/skills/arbiterforge/codearbiter/decompose"><img src="https://agentmods.dev/badge/skills/arbiterforge/codearbiter/decompose.svg" alt="Measured on agentmods" height="20"></a>
Per session 104 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,733 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown 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 $0.00104 $0.04733
Opus 5 $0.00052 $0.02367
Sonnet 5 $0.00021 $0.00947
Haiku 4.5 $0.00010 $0.00473

Measured yesterday against content hash cd8bdd5b2e7f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

decompose 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.

core/surface/skills/decompose/SKILL.md · 169 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

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 First seen · 169 lines · 104 tokens per session scan A cd8bdd5b2e7f

Subscribe to this mod's changes

decompose is a skill published in the GitHub repository arbiterForge/codeArbiter (141 stars, last pushed yesterday), licensed AGPL-3.0. It adds 104 tokens to every session and 4,733 once invoked, about $0.0005 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 2026-09-03.

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