craftbot-skill-creator

craftbot-skill-creator is a skill for Claude Code, Codex from CraftOS-dev/CraftBot. It costs 83 tokens per session (3,963 once invoked), scanned A, original, MIT.

A skill-writing workflow that turns notes from one completed task into a reusable SKILL.md file. It is designed for CraftBot's skill-creation tasks.

In plain words
What is it for?
Use it to read a task summary, generalise the steps, and save a new skill in the project's skills directory.
Why use it?
It removes the need to design a reusable skill from scratch after each successful task. The source notes already contain the relevant workflow.

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/craftos-dev/craftbot/craftbot-skill-creator
Any agent
npx skills add CraftOS-dev/CraftBot --skill craftbot-skill-creator
Clone the repo
git clone --depth 1 https://github.com/CraftOS-dev/CraftBot

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 craftbot-skill-creator

README.md
[![agentmods](https://agentmods.dev/badge/skills/craftos-dev/craftbot/craftbot-skill-creator.svg)](https://agentmods.dev/skills/craftos-dev/craftbot/craftbot-skill-creator)
Your own site
<a href="https://agentmods.dev/skills/craftos-dev/craftbot/craftbot-skill-creator"><img src="https://agentmods.dev/badge/skills/craftos-dev/craftbot/craftbot-skill-creator.svg" alt="Measured on agentmods" height="20"></a>
Per session 83 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,963 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 $0.00083 $0.03963
Opus 5 $0.00042 $0.01982
Sonnet 5 $0.00017 $0.00793
Haiku 4.5 $0.00008 $0.00396

Measured 4d ago against content hash afeea5cf2205, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

craftbot-skill-creator 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.

skills/craftbot-skill-creator/SKILL.md · 267 lines

How it starts

The opening of the file, as written. The whole thing — 267 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CraftBot Skill Creator

Author a reusable skill from one completed task. The handler that spawned this task already gathered everything you need into a single markdown file — read it, generalise it, write the new skill, send the user a one-message summary, end the task. The handler has already posted "Creating skill <name>…" in chat for you, so do not duplicate that message. Your only chat message is the final presentation right before end_turn. Do not iterate with test cases. Do not run subagents.

What you receive

Your task instruction contains five lines (the two paths are absolute — pass them verbatim to read_file / write_file, do NOT prepend or modify any prefix):

Source file (read this — absolute path, use verbatim): <absolute path to SKILL_SOURCE_<id>.md>
Target file (write the new SKILL.md here — absolute path, use verbatim): <absolute path to skills/<name>/SKILL.md>
Mode: create
Skill name: <kebab-case-name>

⚠️ Do not invent your own path for the target file. The handler has already placed it at the correct location under the project's skills/ directory; using the literal value of Target file: puts the SKILL.md where the framework will discover it. A common mistake is generalising the source's agent_file_system/ prefix onto the target — that lands the new skill in the wrong directory and CraftBot will never see it.

SKILL_SOURCE_<task_id>.md has YAML frontmatter (mode, target_skill, source_task_id, generated_at) and these body sections, in order:

  • ## Task name — the short task title shown in the action panel. Treat this as a one-line summary of what the user wanted, not a verbatim instruction (the original instruction is not retained on disk after the source task ends).
  • ## Outcome — status, created/ended timestamps, the skills the source task had attached, and any internal workflow_id.
  • ## Action trace — every action and reasoning item the source agent emitted, in order, with input, output, error, and duration. This is your primary evidence — it is the durable record of what actually happened, kept in actions.db.

Read the full file on GitHub · 267 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. 4d ago First seen · 267 lines · 83 tokens per session scan A afeea5cf2205

Subscribe to this mod's changes

craftbot-skill-creator is a skill published in the GitHub repository CraftOS-dev/CraftBot (376 stars, last pushed yesterday), licensed MIT. It adds 83 tokens to every session and 3,963 once invoked, about $0.0004 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 2026-08-30.

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