rpg-gamemaster-help

rpg-gamemaster-help is a command for Claude Code from vstrapasson/rpg-marketplace. It costs 58 tokens per session (5,174 once invoked), scanned A, original, MIT.

A guide for preparing and running Pathfinder 2e tabletop sessions from an existing campaign world. It connects character setup, world changes, session planning, encounter and challenge building, play support, and post-session records.

In plain words
What is it for?
Use it to run session zero, prepare a session, advance threats between games, build fights or non-combat challenges, run the table, and update campaign notes after play.
Why use it?
It gives the game master one workflow for turning campaign notes into a playable session and recording what happened afterward. It also explains how the different preparation tools fit together.

Command for Claude Code

Written for Claude Code: Claude Code plugin machinery.

Good fit Use it to run session zero, prepare a session, advance threats between games, build fights or non-combat challenges, run the table, and update campaign notes after play.

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Install with agentmods
npx agentmods add commands/vstrapasson/rpg-marketplace/rpg-gamemaster-help
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.

Clone the repo
git clone --depth 1 https://github.com/vstrapasson/rpg-marketplace

Made for: Claude Code.

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 rpg-gamemaster-help

README.md
[![agentmods](https://agentmods.dev/badge/commands/vstrapasson/rpg-marketplace/rpg-gamemaster-help/github.svg)](https://agentmods.dev/commands/vstrapasson/rpg-marketplace/rpg-gamemaster-help)
Your own site
<a href="https://agentmods.dev/commands/vstrapasson/rpg-marketplace/rpg-gamemaster-help"><img src="https://agentmods.dev/badge/commands/vstrapasson/rpg-marketplace/rpg-gamemaster-help/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 rpg-gamemaster-help

Your own site · 80×15
<a href="https://agentmods.dev/commands/vstrapasson/rpg-marketplace/rpg-gamemaster-help"><img src="https://agentmods.dev/badge/commands/vstrapasson/rpg-marketplace/rpg-gamemaster-help.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 58 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 5,174 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 $0.00058 $0.05174
Opus 5 $0.00029 $0.02587
Sonnet 5 $0.00012 $0.01035
Haiku 4.5 $0.00006 $0.00517

Measured 10d ago against content hash 51764ab2b1f0, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

rpg-gamemaster-help 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.

plugins/rpg-gamemaster/commands/rpg-gamemaster-help.md · 93 lines

How it starts

The opening of the file, as written. The whole thing — 93 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Present this guide to the user conversationally — walk them through what the kit is for and the workflows below — then offer to start the workflow that best fits where they are (running session zero to build the party, setting up a front before prep, running prep, building an encounter or a non-combat challenge, sitting down to run, or closing out a session that just happened).

What it is for

You have a world — regions, factions, a clue map, a campaign bible built with the loremaster kit — and now you need to turn that content into something you can actually run at the table. This kit is the session prep and run layer: it runs the session zero that builds the player characters and captures the party, then reads what the world has built, advances the living threats between sessions, assembles a one-page session plan, balances the encounter math, structures the non-combat challenges, produces the GM overlay you glance at during play, and — after the session ends — reconciles what happened back into the vault so the cycle can repeat. Eight skills, a clear flow, and one vault as shared memory. No worldbuilding happens here; if a needed node doesn't exist yet, the skill points you back to the loremaster kit to build it first.

Quick start

  1. Install the plugin: /plugin marketplace add ~/projects/rpg-marketplace (or the GitHub URL), then /plugin install rpg-gamemaster@rpg-marketplace, then /reload-plugins.
  2. Confirm the eight rpg-* skills appear with /skills.
  3. For persistence, rpg-vault-guardian must also be installed — the gamemaster skills write all vault entities through the rpg-preserve write gate, which the guardian provides. Without it, the skills can still produce output; they just won't persist to disk.
  4. The typical flow: party-forge (session zero, once) → front-tracker → session-prep → encounter-builder / embate-builder → run-sheet → [play] → session-recap → front-tracker → …. Run them in that order for a full campaign, or invoke any skill alone when you have a specific need.

Read the full file on GitHub · 93 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. 10d ago First seen · 93 lines · 58 tokens per session scan A 51764ab2b1f0

Subscribe to this mod's changes

rpg-gamemaster-help is a command published in the GitHub repository vstrapasson/rpg-marketplace (2 stars, last pushed 1mo ago), licensed MIT. It adds 58 tokens to every session and 5,174 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 2026-08-31.