augment-world

augment-world is a skill for Claude Code from protoLabsAI/mythx-mcp. It costs 26 tokens per session (1,763 once invoked), scanned A, original, MIT.

A tool for adding new content to an existing tabletop role-playing game world, such as monsters, NPCs, items, places, and encounters.

In plain words
What is it for?
Use it to choose a world pack, review its current contents, and add one or more types of game content in batches.
Why use it?
It helps expand a world without manually organising every addition or losing track of what is already there.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: names the AskUserQuestion tool.

Part of the rpg plugin — 7 skills, 5 agents, 4 hooks shipped together

Good fit Use it to choose a world pack, review its current contents, and add one or more types of game content in batches.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/protolabsai/mythx-mcp/augment-world
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 augment-world
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.

agentmods badge for augment-world

README.md
[![agentmods](https://agentmods.dev/badge/skills/protolabsai/mythx-mcp/augment-world/github.svg)](https://agentmods.dev/skills/protolabsai/mythx-mcp/augment-world)
Your own site
<a href="https://agentmods.dev/skills/protolabsai/mythx-mcp/augment-world"><img src="https://agentmods.dev/badge/skills/protolabsai/mythx-mcp/augment-world/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 augment-world

Your own site · 80×15
<a href="https://agentmods.dev/skills/protolabsai/mythx-mcp/augment-world"><img src="https://agentmods.dev/badge/skills/protolabsai/mythx-mcp/augment-world.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 26 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,763 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00026 $0.01763
Opus 5 $0.00013 $0.00881
Sonnet 5 $0.00005 $0.00353
Haiku 4.5 $0.00003 $0.00176

Measured 9d ago against content hash 21ea8a49ea55, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

augment-world 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 9d 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/augment-world/SKILL.md · 289 lines

How it starts

The opening of the file, as written. The whole thing — 289 lines — stays where its author put it; the contents beside it link to each section on GitHub.

World Augmentation Flow

Guide users through adding new content to existing world packs.


Phase 1: Select World Pack

If no pack ID provided as argument:

  1. Call mcp__rpg__list_world_packs() to get available packs
  2. Use AskUserQuestion to let user pick:
header: "World Pack"
question: "Which world do you want to add content to?"
options:
  - label: "<pack.name>"
    description: "<pack.tagline> - <counts summary>"
  ... for each pack

If pack ID provided, load it directly.


Phase 2: Load World Context

  1. Call mcp__rpg__load_world_summary({ packId }) to get current state
  2. Display current content counts:
Current Content in <world name>:
- Archetypes: X
- Monsters: X
- Items: X
- NPCs: X
- Locations: X
- Encounters: X

Phase 3: Gather Requirements

Use AskUserQuestion to understand what user wants:

Step 1: Content Types

header: "Content Types"
question: "What do you want to add? (select all that apply)"
multiSelect: true
options:
  - label: "Monsters"
    description: "Enemies, creatures, threats"
  - label: "Items"
    description: "Weapons, armor, consumables, special items"
  - label: "NPCs"
    description: "Named characters, merchants, allies, villains"
  - label: "Locations"
    description: "New places to explore"
  - label: "Encounters"
    description: "Combat, social, or event encounters"
  - label: "Archetypes"
    description: "New playable character classes"

Step 2: Quantities

For each selected type, ask:

header: "Monsters"
question: "How many monsters do you want to add?"
options:
  - label: "1-2"
    description: "A specific threat or pair"
  - label: "3-5"
    description: "A small faction or group"
  - label: "6-10"
    description: "A full bestiary expansion"

Step 3: Theme (Optional)

header: "Theme"
question: "Is there a theme or focus for this content?"
options:
  - label: "No specific theme"
    description: "General content fitting the world"
  - label: "Location-based"
    description: "Content for a specific area"
  - label: "Faction-based"
    description: "Content tied to a group or organization"
  - label: "Custom theme"
    description: "Describe your own focus"

Read the full file on GitHub · 289 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. 9d ago First seen · 289 lines · 26 tokens per session scan A 21ea8a49ea55

Subscribe to this mod's changes

augment-world is a skill published in the GitHub repository protoLabsAI/mythx-mcp (2 stars, last pushed 20d ago), licensed MIT. It adds 26 tokens to every session and 1,763 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.

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