What is generate-books?

A command that turns an existing tabletop role-playing game world pack into printable books for the game master and players, plus a bestiary and setting guide.

Use it to create a game-master book, player book, bestiary, campaign setting, shared rules, character sheet, and reference appendices from a selected world pack.

It removes the need to assemble the world's rules, story information, monsters, items, conditions, and encounter tables by hand.

generate-books — Skill for Claude Code by protoLabsAI

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 protoLabsAI/mythx-mcp --skill generate-books

Clone the repo

git clone --depth 1 https://github.com/protoLabsAI/mythx-mcp

Made for: Claude Code.

Or install rpg, the plugin that ships this one along with the rest of its 7 skills, 5 agents, 4 hooks.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/protolabsai/mythx-mcp/generate-books/github.svg)](https://agentmods.dev/skills/protolabsai/mythx-mcp/generate-books)

Your own site

<a href="https://agentmods.dev/skills/protolabsai/mythx-mcp/generate-books"><img src="https://agentmods.dev/badge/skills/protolabsai/mythx-mcp/generate-books/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/protolabsai/mythx-mcp/generate-books"><img src="https://agentmods.dev/badge/skills/protolabsai/mythx-mcp/generate-books.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 27 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,219 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.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00027	$0.01219
Opus 5	$0.00014	$0.00609
Sonnet 5	$0.00005	$0.00244
Haiku 4.5	$0.00003	$0.00122

Measured 12d ago against content hash c0ac90336a65, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

generate-books 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 12d 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.

world-builder/skills/generate-books/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.

Generate Books Command

Generate print-ready books from an existing world pack.

Usage

/generate-books <world-pack-id>

If no world pack ID is provided, lists available packs.

Output

Creates files in the data directory (configurable via RPG_MCP_DATA_DIR environment variable, defaults to ~/.mythxengine/data/):

data/
├── rules/                    # Shared across all worlds
│   ├── core-rules.txt        # Complete rulebook
│   ├── quick-reference.txt   # One-page reference
│   └── character-sheet.txt   # Printable character sheet
│
└── books/<pack-id>/          # World-specific books (uses pack ID)
    ├── gm-book.txt           # GM-only content (full spoilers)
    ├── player-book.txt       # Player-facing content
    ├── bestiary.txt          # All monsters
    ├── campaign-setting.txt  # World overview
    └── appendices/
        ├── items.txt         # Complete item catalog
        ├── conditions.txt    # Conditions reference
        └── encounters.txt    # Encounter tables

Workflow

Phase 1: World Pack Selection

If no pack ID provided:

Call mcp__rpg__list_world_packs() to get available packs

Use AskUserQuestion to let user select:

header: "World Pack"
question: "Which world do you want to generate books for?"
options:
  - label: "<pack-name>"
    description: "<pack-tagline>"
  ...

Phase 2: Validate Pack

Call mcp__rpg__load_world_pack({ packId }) to verify it exists
Display world summary:
- Name and tagline
- Content counts (archetypes, monsters, locations, etc.)
Confirm generation with user

Phase 3: Generate Rulebook (if needed)

Call mcp__rpg__generate_rulebook({ force: false })
If cached: false:
- Launch rpg:book-generator subagent for rulebook
- Wait for completion

Phase 4: Generate World Books (Parallel)

Launch 4 book-generator subagents in a SINGLE message:

Task(subagent_type: "rpg:book-generator",
     prompt: "Generate GM book for pack <id>. Type: gm")
Task(subagent_type: "rpg:book-generator",
     prompt: "Generate player book for pack <id>. Type: player")
Task(subagent_type: "rpg:book-generator",
     prompt: "Generate bestiary for pack <id>. Type: bestiary")
Task(subagent_type: "rpg:book-generator",
     prompt: "Generate campaign setting for pack <id>. Type: setting")

Read the full file on GitHub · 190 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.

12d ago First seen · 190 lines · 27 tokens per session scan A c0ac90336a65

Subscribe to this mod's changes

generate-books is a skill published in the GitHub repository protoLabsAI/mythx-mcp (2 stars, last pushed 23d ago), licensed MIT. It adds 27 tokens to every session and 1,219 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 2026-08-31.

Claude Code Creative and media Game development ai ai-agents anthropic claude claude-desktop

pixel-art

Pixel art w/ era palettes (NES, Game Boy, PICO-8).

NousResearch/hermes-agent · 20 tokens

asset-spec

Generate per-asset visual specifications and AI generation prompts from GDDs, level docs, or character profiles. Produces structured spec files and updates the master asset manifest. Run after art bible and GDD/level design are approved, before production begins.

Donchitos/Claude-Code-Game-Studios · 54 tokens

generate-books