skill-author

skill-author is a skill for Claude Code from himkt/cafleet. It costs 126 tokens per session (10,327 once invoked), scanned A, original, MIT.

A guide for authors who are building coding-agent skills that coordinate several agents through the CAFleet message broker.

In plain words
What is it for?
Use it when creating a skill with a Director-and-member team, spawning isolated agent processes, or designing a multi-agent workflow.
Why use it?
It explains the roles, setup, spawning, messaging, and coordination needed for a supervising agent and its separate worker agents to operate reliably.

Skill for Claude Code

Written for Claude Code: installed under .claude/. Also seen: mentions subagents; names the AskUserQuestion tool; mentions 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 skills/himkt/cafleet/skill-author
Any agent
npx skills add himkt/cafleet --skill skill-author
Clone the repo
git clone --depth 1 https://github.com/himkt/cafleet

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 skill-author

README.md
[![agentmods](https://agentmods.dev/badge/skills/himkt/cafleet/skill-author.svg)](https://agentmods.dev/skills/himkt/cafleet/skill-author)
Your own site
<a href="https://agentmods.dev/skills/himkt/cafleet/skill-author"><img src="https://agentmods.dev/badge/skills/himkt/cafleet/skill-author.svg" alt="Measured on agentmods" height="20"></a>
Per session 126 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 10,327 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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 5.1 $0.00126 $0.10327
Opus 5 $0.00063 $0.05164
Sonnet 5 $0.00025 $0.02065
Haiku 4.5 $0.00013 $0.01033

Measured 6d ago against content hash 71f88a395615, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

skill-author scanned grade A with 1 finding 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 6d 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.

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

2. **Mkdir on first write**: `(Path(BASE) / "prompts").mkdir(parents=True, exist_ok=True)`. Use `pathlib`, not `subprocess.run(["mkdir", ...])`. This is enforced by the no-bypass write protocol.
.claude/skills/skill-author/SKILL.md · 539 lines

How it starts

The opening of the file, as written. The whole thing — 539 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Skill Author — Integrating the CAFleet-Orchestrated Pattern

You are about to write a new skill that drives a Director and one or more spawned members through the CAFleet message broker. This guide walks you through every sub-system you need to wire up, explains why each step exists, and finishes with a worked example you can read end-to-end. It is a teaching document — not a paste-this template — because the canonical rules drift quickly and skills that copy a prefab spawn prompt rot the fastest.

Read this whole document before you start writing your SKILL.md. The rules are short individually but the failure modes when any of them is missed are loud, and most of them have already bitten earlier authors.


1. What "CAFleet-orchestrated" means

A CAFleet-orchestrated skill is one where the Director (the main Claude session running your slash command) bootstraps a fresh CAFleet fleet, spawns one or more members as separate claude (or codex) processes inside dedicated tmux panes, and coordinates the work through the CAFleet message broker (cafleet message send / cafleet message poll / cafleet message ack). Members are real, isolated coding-agent processes — not in-process subagents — and the broker delivers each message as a 2-line keystroke preview into the recipient's tmux pane.

The shape always looks like this:

User
 +-- Director (main Claude — runs cafleet fleet create / member create; coordinates via the broker)
      +-- member-1 (claude pane)
      +-- member-2 (claude pane)
      +-- ...

Use this pattern when:

  • The work needs parallelism that the harness cannot provide on its own — multiple members drafting in parallel, multiple researchers investigating sub-topics, multiple verifiers running on different slide ranges.
  • The work needs role specialization — Director / Drafter / Reviewer / Programmer / Tester are roles that justify separate processes with separate role files.
  • The work needs persistent inter-member memory — the broker stores every message in SQLite and the audit-file path under ${BASE}/prompts/ is a permanent record.

Read the full file on GitHub · 539 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. 6d ago First seen · 539 lines · 126 tokens per session scan A 71f88a395615

Subscribe to this mod's changes

skill-author is a skill published in the GitHub repository himkt/cafleet (49 stars, last pushed today), licensed MIT. It adds 126 tokens to every session and 10,327 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it A with 1 finding (runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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