skill-builder

skill-builder is a skill for Claude Code, Codex from j1ngg/tech-marketing-framework. It costs 28 tokens per session (151 once invoked), scanned A, original, MIT.

A design guide for creating a new repository skill or coding agent with an appropriate structure, workflow pattern, and rules.

In plain words
What is it for?
Use it to plan a skill or agent, choose its structure, and define the rules it should follow.
Why use it?
It helps avoid unclear instructions and unsuitable designs when building an agent add-on.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents); mentions AGENTS.md; mentions Codex.

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/j1ngg/tech-marketing-framework/skill-builder
Any agent
npx skills add j1ngg/tech-marketing-framework --skill skill-builder
Clone the repo
git clone --depth 1 https://github.com/j1ngg/tech-marketing-framework

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 skill-builder

README.md
[![agentmods](https://agentmods.dev/badge/skills/j1ngg/tech-marketing-framework/skill-builder.svg)](https://agentmods.dev/skills/j1ngg/tech-marketing-framework/skill-builder)
Your own site
<a href="https://agentmods.dev/skills/j1ngg/tech-marketing-framework/skill-builder"><img src="https://agentmods.dev/badge/skills/j1ngg/tech-marketing-framework/skill-builder.svg" alt="Measured on agentmods" height="20"></a>
Per session 28 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 151 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 5.1 $0.00028 $0.00151
Opus 5 $0.00014 $0.00076
Sonnet 5 $0.00006 $0.00030
Haiku 4.5 $0.00003 $0.00015

Measured 6d ago against content hash 03dd5bedf282, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, 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.

.agents/skills/skill-builder/SKILL.md · 23 lines

What it actually says

Skill Builder

This is a Codex compatibility wrapper.

Follow the canonical workflow in:

  • ../../../.claude/skills/skill-builder/SKILL.md

Before starting:

  1. Read ../../../AGENTS.md
  2. Apply the shared rules in ../../../.claude/rules/content-guidelines.md
  3. Prefer docs/inputs-local/ over docs/inputs/ when the local directory exists

Compatibility rule:

  • Keep ../../../.claude/skills/skill-builder/SKILL.md as the source of truth for the workflow
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 · 23 lines · 28 tokens per session scan A 03dd5bedf282

Subscribe to this mod's changes

skill-builder is a skill published in the GitHub repository j1ngg/tech-marketing-framework (56 stars, last pushed 4mo ago), licensed MIT. It adds 28 tokens to every session and 151 once invoked, about $0.0001 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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