Borrowing it
Nothing to install: this file belongs to Txpple/fvtt-mcp-molten5e. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/Txpple/fvtt-mcp-molten5e/main/.claude/skills/cards-builder/SKILL.mdgit clone --depth 1 https://github.com/Txpple/fvtt-mcp-molten5eWrote 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/skills/txpple/fvtt-mcp-molten5e/cards-builder)<a href="https://agentmods.dev/skills/txpple/fvtt-mcp-molten5e/cards-builder"><img src="https://agentmods.dev/badge/skills/txpple/fvtt-mcp-molten5e/cards-builder/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/skills/txpple/fvtt-mcp-molten5e/cards-builder"><img src="https://agentmods.dev/badge/skills/txpple/fvtt-mcp-molten5e/cards-builder.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 | $0.00195 | $0.01478 |
| Opus 5 | $0.00097 | $0.00739 |
| Sonnet 5 | $0.00039 | $0.00296 |
| Haiku 4.5 | $0.00019 | $0.00148 |
Grade A, and why
cards-builder 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.
How it starts
The opening of the file, as written. The whole thing — 100 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Cards builder
The judgment + content layer for playable cards (design.md §5) — Foundry card stacks (decks, hands, piles) for in-play use: a Deck of Many Things, a tarokka deck, an encounter/fate deck, a standard deck of cards. As with every authoring skill: you decide; the tool does.
The line that matters — yours vs the tool's
- You (this skill) decide the deck's CONTENTS — which cards, each card's name, its face text (the outcome/effect/flavor), and which art it uses. That judgment IS the job.
- The tool only STRUCTURES —
create-cardsrenders your cards into the v14 Cards/Card shape (one face per card:{ name, text?, img? });import-cardsinstantiates a core preset deck. Neither invents a card.
Authoring policy — what compendium-first means HERE
Read _shared/authoring-policy.md. The big clarification for cards:
- Cards have NO premium-book compendium (the MM/PHB/DMG ship no card decks). So compendium-first
is N/A — decks are asset-driven, like scenes: the card art is an uploaded image asset, and
the face text is yours to write. There is no "copy the book deck" path;
import-cardsonly instantiates Foundry's built-in preset decks (a standard 52-card deck). - Don't fabricate canon. A famous deck's contents ARE canonical — the Deck of Many Things card list and its effects come from the DMG; transcribe them, don't invent new cards or outcomes. If the user wants a deck of content you don't have, STOP and ASK rather than making it up. Custom/themed decks (an event deck for your adventure) are yours to author.
Tools
create-cards— the structuring creator (your main tool).{ name, type?, description?, folderName?, cards?: [{ name, text?, img? }] }. Builds a stack with one face per card.import-cards— instantiate a core preset deck ({ preset, name?, folderName? }), e.g.pokerDark/pokerLight(a standard 52-card deck). The ready-made-deck path.list-cards— list stacks + ids (deck/hand/pile, card count).delete-cards— remove stacks by exact id/name (strict).
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.
- 9d ago First seen · 100 lines · 195 tokens per session scan A a5e543960d6f
cards-builder is a skill published in the GitHub repository Txpple/fvtt-mcp-molten5e (0 stars, last pushed today), licensed MIT. It adds 195 tokens to every session and 1,478 once invoked, about $0.0010 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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