adv-create

adv-create is a skill for Claude Code, Codex from YunYouJun/advjs. It costs 59 tokens per session (1,762 once invoked), scanned A, original, MPL-2.0.

A project-creation guide for ADV.JS, a visual-novel engine that uses Markdown files to define interactive stories. It helps turn a story idea into a structured game project with characters, scenes, and chapters.

In plain words
What is it for?
Use it to initialize an ADV.JS game, plan its world and cast, create scenes and resources, draft the first chapter, and validate the new project.
Why use it?
It removes the need to design the project structure and setup process from scratch when beginning a visual novel.

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/yunyoujun/advjs/adv-create
Any agent
npx skills add YunYouJun/advjs --skill adv-create
Clone the repo
git clone --depth 1 https://github.com/YunYouJun/advjs

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 adv-create

README.md
[![agentmods](https://agentmods.dev/badge/skills/yunyoujun/advjs/adv-create.svg)](https://agentmods.dev/skills/yunyoujun/advjs/adv-create)
Your own site
<a href="https://agentmods.dev/skills/yunyoujun/advjs/adv-create"><img src="https://agentmods.dev/badge/skills/yunyoujun/advjs/adv-create.svg" alt="Measured on agentmods" height="20"></a>
Per session 59 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,762 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 $0.00059 $0.01762
Opus 5 $0.00030 $0.00881
Sonnet 5 $0.00012 $0.00352
Haiku 4.5 $0.00006 $0.00176

Measured 4d ago against content hash a618e8fc8f5b, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

adv-create 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/adv-create/SKILL.md · 190 lines

How it starts

The opening of the file, as written. The whole thing — 190 lines — stays where its author put it; the contents beside it link to each section on GitHub.

ADV Create Skill

You are a visual novel project creator for ADV.JS. You guide users through designing and scaffolding a complete visual novel project from their initial concept.

Overview

ADV.JS is a visual novel / interactive narrative engine using Markdown-based scripting (.adv.md). This skill helps users create a fully structured project with world-building, characters, scenes, and a first chapter draft.

v0.3 change: bulk creation goes through MCP tools (atomic; no half-written project state). Scenes always carry an imagePrompt for downstream AI image generation.

Workflow

Step 1: Gather the Concept

Ask the user about their game idea. Collect:

  • Genre: School romance, fantasy, mystery, sci-fi, etc.
  • Tone/Mood: Warm/healing, suspenseful, dark, comedic, etc.
  • Chapter count: How many chapters they envision (3-5 for short, 8-12 for medium)
  • Inspirations: Any existing works they want it to feel like (CLANNAD, Steins;Gate, etc.)
  • Key characters: At least a protagonist and one main character

If the user gives a brief description, infer reasonable defaults and confirm.

Step 2: Initialize the Project

adv init <dir> --name "<project-name>"

This creates the project skeleton from the built-in template. Pick a template that matches the concept:

  • --template default (default) — school-romance skeleton, single heroine.
  • --template galgame — dating sim: multiple heroines, an affection (好感度) system, and route branching. Character cards use attributes.template: galgame (birthday / blood type / likes / affinity).
adv init <dir> --name "<project-name>" --template galgame

If the user describes a multi-heroine / route-based galgame, start from the galgame template so the affection scaffolding is already in place.

Step 3: World-building Files (hand-written)

Write the project-level prose files directly — these don't fit neatly into MCP fields:

  • adv/world.md — Era, location, core rules, art direction
  • adv/outline.md — One-line summary + chapter breakdown + ending branches (TRUE / NORMAL / BAD)
  • adv/glossary.md — Special terminology table (if the world warrants one)

Read the full file on GitHub · 190 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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 · 190 lines · 59 tokens per session scan A a618e8fc8f5b

Subscribe to this mod's changes

adv-create is a skill published in the GitHub repository YunYouJun/advjs (324 stars, last pushed 14d ago), licensed MPL-2.0. It adds 59 tokens to every session and 1,762 once invoked, about $0.0003 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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