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.
git clone --depth 1 https://github.com/vstrapasson/rpg-marketplaceWrote 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.
[](https://agentmods.dev/commands/vstrapasson/rpg-marketplace/rpg-gamemaster-help)<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.
<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>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 | $0.00058 | $0.05174 |
| Opus 5 | $0.00029 | $0.02587 |
| Sonnet 5 | $0.00012 | $0.01035 |
| Haiku 4.5 | $0.00006 | $0.00517 |
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.
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
- Install the plugin:
/plugin marketplace add ~/projects/rpg-marketplace(or the GitHub URL), then/plugin install rpg-gamemaster@rpg-marketplace, then/reload-plugins. - Confirm the eight
rpg-*skills appear with/skills. - For persistence,
rpg-vault-guardianmust also be installed — the gamemaster skills write all vault entities through therpg-preservewrite gate, which the guardian provides. Without it, the skills can still produce output; they just won't persist to disk. - 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.
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.
- 10d ago First seen · 93 lines · 58 tokens per session scan A 51764ab2b1f0
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.
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