skill-builder

skill-builder is a skill for Claude Code, Codex from oyi77/1ai-skills. It costs 40 tokens per session (1,382 once invoked), scanned A, original, MIT.

A guide for creating AI skills from documentation, code repositories, PDFs, videos, and other knowledge sources.

In plain words
What is it for?
Use it to build new skills, define their triggers and structure, and verify them against source material.
Why use it?
It gives you a structured way to turn existing reference material into instructions an AI agent can use.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Part of the 1ai-skills plugin — 187 skills, 4 commands shipped together

Good fit Use it to build new skills, define their triggers and structure, and verify them against source material.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/oyi77/1ai-skills/skill-builder
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 oyi77/1ai-skills --skill skill-builder
Clone the repo
git clone --depth 1 https://github.com/oyi77/1ai-skills

Made for: Claude Code, Codex.

Or install 1ai-skills, the plugin that ships this one along with the rest of its 187 skills, 4 commands.

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-builder

README.md
[![agentmods](https://agentmods.dev/badge/skills/oyi77/1ai-skills/skill-builder/github.svg)](https://agentmods.dev/skills/oyi77/1ai-skills/skill-builder)
Your own site
<a href="https://agentmods.dev/skills/oyi77/1ai-skills/skill-builder"><img src="https://agentmods.dev/badge/skills/oyi77/1ai-skills/skill-builder/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 skill-builder

Your own site · 80×15
<a href="https://agentmods.dev/skills/oyi77/1ai-skills/skill-builder"><img src="https://agentmods.dev/badge/skills/oyi77/1ai-skills/skill-builder.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 40 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,382 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 $0.00040 $0.01382
Opus 5 $0.00020 $0.00691
Sonnet 5 $0.00008 $0.00276
Haiku 4.5 $0.00004 $0.00138

Measured 6d ago against content hash ab1025c25341, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

skill-builder 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 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.

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/skill-builder/SKILL.md · 153 lines

How it starts

The opening of the file, as written. The whole thing — 153 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Skill Builder

You have access to the Skill Seekers MCP server which provides 40 tools for converting knowledge sources into AI-ready skills.

Overview

Build new agent skills with proper structure, triggers, and verification.

When NOT to Use

  • You need to edit an existing skill (use the skill's own editing workflow)
  • The source is a conversational transcript with no clear structure (use manual writing)
  • You're looking for pre-built skills (use skill_view or search the 1ai-skills library)

Anti-Rationalization Table

Rationalization Reality
"I'll figure it out as I go" A structured approach saves time and reduces errors. Follow the workflow in this skill rather than improvising.
"I already know this topic" Familiarity breeds shortcuts. Use the checklist to verify you haven't missed critical steps.
"This doesn't apply to my situation" The patterns here generalize across contexts. Adapt, don't skip — the underlying principles hold.
"One more tool will fix it" Adding complexity rarely solves process gaps. Master the core workflow first.

When to Use

Trigger phrases:

  • "skill builder"
  • "Wants to create an AI skill from a documentation site, GitHub repo, PDF, video,"
  • "Needs to convert documentation into a format suitable for LLM consumption"
  • "Wants to update or sync existing skills with their source documentation"

Use this skill when the user:

  • Wants to create an AI skill from a documentation site, GitHub repo, PDF, video, or other source
  • Needs to convert documentation into a format suitable for LLM consumption
  • Wants to update or sync existing skills with their source documentation
  • Needs to export skills to vector databases (Weaviate, Chroma, FAISS, Qdrant)
  • Asks about scraping, converting, or packaging documentation for AI

Source Type Detection

Automatically detect the source type from user input:

Input Pattern Source Type Tool to Use
https://... (not GitHub/YouTube) Documentation scrape_docs
owner/repo or github.com/... GitHub scrape_github
*.pdf PDF scrape_pdf
YouTube/Vimeo URL or video file Video scrape_video
Local directory path Codebase scrape_codebase
*.ipynb, *.html, *.yaml (OpenAPI), *.adoc, *.pptx, *.rss, *.1-.8 Various scrape_generic
JSON config file Unified Use config with scrape_docs

Read the full file on GitHub · 153 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 · 153 lines · 40 tokens per session scan A ab1025c25341

Subscribe to this mod's changes

skill-builder is a skill published in the GitHub repository oyi77/1ai-skills (12 stars, last pushed today), licensed MIT. It adds 40 tokens to every session and 1,382 once invoked, about $0.0002 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.

Related

Other skills, from other repositories