design-procedural-gen

design-procedural-gen is a skill for Claude Code from fcsouza/agent-skills. It costs 66 tokens per session (2,264 once invoked), scanned A, original, GPL-3.0.

A guide for building systems that create changing content from rules, inputs, or random values instead of storing every result by hand.

In plain words
What is it for?
Use it when implementing generated dungeons, maps, loot tables, worlds, noise-based terrain, varied non-player characters, or wave function collapse.
Why use it?
Procedural systems can be difficult to design consistently, especially when maps, rewards, terrain, or character behaviour must vary while following rules.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the game-dev plugin — 25 skills, 7 commands, 3 agents, 5 hooks, 3 MCP servers shipped together

Good fit Use it when implementing generated dungeons, maps, loot tables, worlds, noise-based terrain, varied non-player characters, or wave function collapse.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/fcsouza/agent-skills/procedural-gen
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 fcsouza/agent-skills --skill procedural-gen
Clone the repo
git clone --depth 1 https://github.com/fcsouza/agent-skills

Made for: Claude Code.

Or install game-dev, the plugin that ships this one along with the rest of its 25 skills, 7 commands, 3 agents, 5 hooks, 3 MCP servers.

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 design-procedural-gen

README.md
[![agentmods](https://agentmods.dev/badge/skills/fcsouza/agent-skills/procedural-gen/github.svg)](https://agentmods.dev/skills/fcsouza/agent-skills/procedural-gen)
Your own site
<a href="https://agentmods.dev/skills/fcsouza/agent-skills/procedural-gen"><img src="https://agentmods.dev/badge/skills/fcsouza/agent-skills/procedural-gen/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 design-procedural-gen

Your own site · 80×15
<a href="https://agentmods.dev/skills/fcsouza/agent-skills/procedural-gen"><img src="https://agentmods.dev/badge/skills/fcsouza/agent-skills/procedural-gen.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 66 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,264 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 $0.00066 $0.02264
Opus 5 $0.00033 $0.01132
Sonnet 5 $0.00013 $0.00453
Haiku 4.5 $0.00007 $0.00226

Measured 9d ago against content hash 42d4cfd9021b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

design-procedural-gen 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.

The scan reads SKILL.md. This mod also ships 2 executable files (boilerplate/dungeon-generator.ts, boilerplate/loot-table.ts), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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/game-dev/design/procedural-gen/SKILL.md · 209 lines

The source is not reproduced here

Licensed GPL-3.0

The repository is licensed GPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

Files

What ships with it

3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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 · 209 lines · 66 tokens per session scan A 42d4cfd9021b

Subscribe to this mod's changes

design-procedural-gen is a skill published in the GitHub repository fcsouza/agent-skills (20 stars, last pushed today), licensed GPL-3.0. It adds 66 tokens to every session and 2,264 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 2026-08-30.