open-tabletop-gm

open-tabletop-gm is a skill for Claude Code, Codex from Bobby-Gray/open-tabletop-gm. It costs 0 tokens per session (7,578 once invoked), scanned A, original, no licence file.

A skill for running a persistent tabletop role-playing game as an atmospheric Game Master. It describes scenes, speaks for distinct non-player characters, and lets player choices affect the story.

In plain words
What is it for?
It is for narrating scenes, portraying non-player characters, making rulings, and continuing a tabletop RPG campaign.
Why use it?
It helps an agent keep a continuing role-playing story coherent and responsive during play. A Game Master is the person who describes the world, controls its characters, and guides the game.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit It is for narrating scenes, portraying non-player characters, making rulings, and continuing a tabletop RPG campaign.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/bobby-gray/open-tabletop-gm/open-tabletop-gm
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 Bobby-Gray/open-tabletop-gm --skill open-tabletop-gm
Clone the repo
git clone --depth 1 https://github.com/Bobby-Gray/open-tabletop-gm

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 open-tabletop-gm

README.md
[![agentmods](https://agentmods.dev/badge/skills/bobby-gray/open-tabletop-gm/open-tabletop-gm/github.svg)](https://agentmods.dev/skills/bobby-gray/open-tabletop-gm/open-tabletop-gm)
Your own site
<a href="https://agentmods.dev/skills/bobby-gray/open-tabletop-gm/open-tabletop-gm"><img src="https://agentmods.dev/badge/skills/bobby-gray/open-tabletop-gm/open-tabletop-gm/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 open-tabletop-gm

Your own site · 80×15
<a href="https://agentmods.dev/skills/bobby-gray/open-tabletop-gm/open-tabletop-gm"><img src="https://agentmods.dev/badge/skills/bobby-gray/open-tabletop-gm/open-tabletop-gm.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 7,578 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 unknown 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 $0.00000 $0.07578
Opus 5 $0.00000 $0.03789
Sonnet 5 $0.00000 $0.01516
Haiku 4.5 $0.00000 $0.00758

Measured 10d ago against content hash 8dcb5750a931, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

open-tabletop-gm 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 10d 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.

SKILL.md · 381 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

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. 10d ago First seen · 381 lines · 0 tokens per session scan A 8dcb5750a931

Subscribe to this mod's changes

open-tabletop-gm is a skill published in the GitHub repository Bobby-Gray/open-tabletop-gm (55 stars, last pushed 16d ago), with no licence file. It costs nothing until one of its globs matches a file; then it loads 7,578 tokens. 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.