Agent skill

Worldbuilding

Diagnose world-level story problems. An agent skill from jwynia/agent-skills.

Install Worldbuilding

skills CLI

$ npx skills add jwynia/agent-skills --skill worldbuilding -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install jwynia/agent-skills worldbuilding --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/jwynia/agent-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/creative/fiction/worldbuilding/worldbuilding .claude/skills/worldbuilding && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "worldbuilding" agent skill from https://github.com/jwynia/agent-skills/tree/main/skills/creative/fiction/worldbuilding/worldbuilding into .claude/skills/worldbuilding/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "worldbuilding", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/jwynia/agent-skills/tree/main/skills/creative/fiction/worldbuilding/worldbuilding

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add jwynia/agent-skills --skill worldbuilding -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install jwynia/agent-skills worldbuilding --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/jwynia/agent-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/creative/fiction/worldbuilding/worldbuilding .agents/skills/worldbuilding && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "worldbuilding" agent skill from https://github.com/jwynia/agent-skills/tree/main/skills/creative/fiction/worldbuilding/worldbuilding into .agents/skills/worldbuilding/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "worldbuilding", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add jwynia/agent-skills --skill worldbuilding -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install jwynia/agent-skills worldbuilding --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/jwynia/agent-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/creative/fiction/worldbuilding/worldbuilding .cursor/skills/worldbuilding && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "worldbuilding" agent skill from https://github.com/jwynia/agent-skills/tree/main/skills/creative/fiction/worldbuilding/worldbuilding into .cursor/skills/worldbuilding/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "worldbuilding", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/jwynia/agent-skills.git --path skills/creative/fiction/worldbuilding/worldbuilding

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add jwynia/agent-skills --skill worldbuilding -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install jwynia/agent-skills worldbuilding --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/jwynia/agent-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/creative/fiction/worldbuilding/worldbuilding .gemini/skills/worldbuilding && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "worldbuilding" agent skill from https://github.com/jwynia/agent-skills/tree/main/skills/creative/fiction/worldbuilding/worldbuilding into .gemini/skills/worldbuilding/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "worldbuilding", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install jwynia/agent-skills worldbuilding

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add jwynia/agent-skills --skill worldbuilding -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/jwynia/agent-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/creative/fiction/worldbuilding/worldbuilding .github/skills/worldbuilding && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "worldbuilding" agent skill from https://github.com/jwynia/agent-skills/tree/main/skills/creative/fiction/worldbuilding/worldbuilding into .github/skills/worldbuilding/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "worldbuilding", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add jwynia/agent-skills --skill worldbuilding -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install jwynia/agent-skills worldbuilding --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/jwynia/agent-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/creative/fiction/worldbuilding/worldbuilding .opencode/skills/worldbuilding && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "worldbuilding" agent skill from https://github.com/jwynia/agent-skills/tree/main/skills/creative/fiction/worldbuilding/worldbuilding into .opencode/skills/worldbuilding/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "worldbuilding", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: worldbuilding
GitHub stars: 170
Token cost: ~1.2k tokens
SKILL.md length: 442 words
Files: 1
Skills in repo: 111
Repo updated: Feb 24, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Diagnose world-level story problems. An agent skill from jwynia/agent-skills.

Tasks that involve Creative writing and fiction
SKILL.md covers When to Use This Skill, Core Principle, The World States and Consequence Cascade, plus 4 more sections
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Worldbuilding is an agent skill from jwynia/agent-skills. Diagnose world-level story problems. This skill should be used when settings feel thin, institutions feel designed rather than evolved, economies don't make sense, or non-human species feel like humans in costume. Keywords: worldbuilding, setting, world, institutions, economy, culture, species, consequences.

Its SKILL.md is about 1.2k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts. Compatibility notes: Works with any fiction genre. Pairs with story-sense for routing.

It sits in Writing & Content, covering Creative writing and fiction. The licence is MIT.

When your agent uses it

Tasks that involve Creative writing and fiction

Example prompts

“/worldbuilding”

Requirements

Compatibility (from SKILL.md): Works with any fiction genre. Pairs with story-sense for routing.

What it can do on your machine

Read from SKILL.md and the folder at commit e02ec7e. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Compatibility
Works with any fiction genre. Pairs with story-sense for routing.
From compatibility in the SKILL.md frontmatter.

Context cost

Worldbuilding loads about 1.2k tokens when it runs. Until then it costs about 81 tokens; SKILL.md has 442 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~81
When it runs · the whole SKILL.md, loaded when a task matches: ~1.2k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from jwynia/agent-skills at commit e02ec7e, republished under its MIT licence (© jwynia). 442 words, ~1,195 tokens.

Download SKILL.mdSave it as .claude/skills/worldbuilding/SKILL.md (or your agent's skills folder).

name: worldbuilding
description: Diagnose world-level story problems. This skill should be used when settings feel thin, institutions feel designed rather than evolved, economies don't make sense, or non-human species feel like humans in costume. Keywords: worldbuilding, setting, world, institutions, economy, culture, species, consequences.
compatibility: Works with any fiction genre. Pairs with story-sense for routing.
license: MIT
metadata.author: jwynia
metadata.version: 1.0
metadata.type: diagnostic
metadata.mode: diagnostic
metadata.domain: worldbuilding

Worldbuilding: Diagnostic Skill

Diagnose world-level problems in fictional settings. Identify what's missing or unconvincing and recommend specific interventions.

When to Use This Skill

Use this skill when:

Setting feels like a painted backdrop
Technology/magic hasn't transformed society
Institutions feel designed rather than evolved
Economy doesn't make sense
Cultures lack depth

Do NOT use this skill when:

Story problems are character-focused (use character-arc)
Plot structure issues (use scene-sequencing)
Need to generate worlds from scratch (use systemic-worldbuilding)

Core Principle

Worlds fail when they feel designed rather than evolved.

Good worldbuilding creates the perception that the setting has history, internal logic, and processes that operate independently of the plot.

The World States

W1: Backdrop World

Symptoms: Setting exists but has no independent logic Interventions: systemic-worldbuilding (trace consequences)

W2: World Without Consequences

Symptoms: Technology/magic exists but hasn't transformed society Interventions: Consequence Cascade Analysis

W3: Institutions Without History

Symptoms: Organizations feel designed last week Interventions: Organic Institutional Design

W4: Economy Doesn't Make Sense

Symptoms: Trade exists without supply chains; prices arbitrary Interventions: economic-systems

W5: Belief Systems Are Shallow

Symptoms: Religion is flavor without theological depth Interventions: belief-systems

W6: Culture Without Depth

Symptoms: Traditions feel random; surface-level aesthetic Interventions: memetic-depth

W7: Flat Non-Humans

Symptoms: Aliens/species are humans in costume Interventions: conlang, alien-sensory frameworks

W7.5: Language Feels Generic

Symptoms: Names sound like English; no linguistic texture Interventions: conlang, language-evolution

Consequence Cascade

Apply to any major speculative element:

Initial Element
├── 1st Order: Direct practical effects
│   ├── Who gains immediate advantage?
│   ├── What becomes obsolete?
│   └── Technical limitations?
├── 2nd Order: Systemic adaptations
│   ├── How do economic structures adapt?
│   ├── How do power structures respond?
│   └── What resistance movements arise?
└── 3rd Order: Cultural evolution
    ├── What new language emerges?
    ├── What ethical questions arise?
    └── What becomes normalized?

Key Diagnostic Questions

For Technology/Magic

What's your initial divergence from our world?
Who gains power? What becomes obsolete?
How would the powerful try to control this?

For Institutions

When was this organization founded?
What crises has it survived?
What are its internal contradictions?

Show full SKILL.md (169 more words)Show less

For Economics

What's the fundamental scarcity?
How is value determined?
What's the underground economy?

For Belief Systems

What explains existence?
How do beliefs affect daily decisions?
What are the schisms and debates?

Common Anti-Patterns

The Monoculture

One unified culture for entire planets/species. Fix: Add regional variation, class differences, schisms.

The Convenient Technology

Technology exists when plot needs it. Fix: Trace consequence cascade.

The Static History

World unchanged for centuries. Fix: Add recent disruptions, reforms in progress.

The Evil Empire

Antagonist nation uniformly evil. Fix: Add internal debates, ordinary people.

The Rubber Forehead Alien

Non-humans with minor cosmetic differences. Fix: Start with biology, trace to cognition, trace to culture.

Depth vs Breadth

Go Deep When:

Element is central to plot
Element will be examined closely
Element creates ongoing conflict

Stay Shallow When:

Element is background detail
POV character wouldn't know depth
Mystery is more interesting

systemic-worldbuilding - Build worlds from initial divergence
belief-systems - Deep theological design
economic-systems - Economic logic
governance-systems - Political structures
conlang - Language design
settlement-design - Cities and geography

Files

Just SKILL.md in skills/creative/fiction/worldbuilding/worldbuilding of jwynia/agent-skills.

Open the folder on GitHubat commit e02ec7e

Compare with similar skills

Worldbuilding next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Worldbuilding compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Worldbuilding this skilljwynia/agent-skills	170	—	~1.2k	Automated safety check: Pass	MIT	7 mo ago
Story Multi-Perspective Reviewzenstory-ai/oh-story-claudecode	7.4k	3 repos	~3k	Automated safety check: Pass	MIT	today
Short Web Fiction Trend Scanzenstory-ai/oh-story-claudecode	7.4k	2 repos	~1.2k	Automated safety check: Pass	MIT	today
InkOS Creative HarnessNarcooo/inkos	10k	1 repos	~1.1k	Automated safety check: Pass	AGPL-3.0	today
Novel Arteternityspring/shuohao-skills	4.3k	—	~1.1k	Automated safety check: Notes	Apache-2.0	yesterday
SepiaNanako0129/sepia	3.1k	—	~3.6k	Automated safety check: Pass	MIT	today

Similar skills

Story Multi-Perspective Review
zenstory-ai/oh-story-claudecode
Reviews Chinese web-novel text with several reviewer agents in parallel, falling back to a single-agent pass, and reports structure, character, prose and setting problems with fixes.
7.4k GitHub starsUsed in 3 repos~3k tokens
Writing & ContentAuto-check passed
Short Web Fiction Trend Scan
zenstory-ai/oh-story-claudecode
Scans popular short web-fiction rankings on Chinese platforms such as Dianzhong and Heiyan to surface trending emotional hooks, themes and topic candidates with an expiry warning.
7.4k GitHub starsUsed in 2 repos~1.2k tokens
Writing & ContentAuto-check passed
InkOS Creative Harness
Narcooo/inkos
Drives long-form fiction, scripts, storyboards, interactive films and long-document translation through InkOS, with every change made by a typed action.
10k GitHub starsUsed in 1 repo~1.1k tokens
Writing & ContentAuto-check passed
Novel Art
eternityspring/shuohao-skills
给 AI 短剧出美术设定集（场景 + 叙事道具）：场景的设计意图、一致性锚点、光照时段变体、空景提示词；道具的戏剧功能、状态变体、尺度参照、白底无手提示词。
4.3k GitHub stars~1.1k tokensUpdated yesterday
Writing & ContentAuto-check: notes
Sepia
Nanako0129/sepia
Make AI-generated writing read as human-written, in fiction and in professional prose.
3.1k GitHub stars~3.6k tokensUpdated today
Writing & ContentAuto-check passed
Story Toolbox Router
zenstory-ai/oh-story-claudecode
Routes a Chinese web-novel writing request to the matching tool in a 13-skill toolbox, covers author habit memory, and can launch a local dashboard for browsing a project.
7.4k GitHub stars~1.7k tokensUpdated today
Writing & ContentAuto-check passed

Questions about Worldbuilding

What does Worldbuilding do?

Diagnose world-level story problems. An agent skill from jwynia/agent-skills. Worldbuilding is an agent skill from jwynia/agent-skills. Diagnose world-level story problems.

When should I use Worldbuilding?

Worldbuilding fits situations like: tasks that involve Creative writing and fiction.

How do I install Worldbuilding in Claude Code?

Run `npx skills add jwynia/agent-skills --skill worldbuilding -a claude-code`. Or copy the skill folder (skills/creative/fiction/worldbuilding/worldbuilding in jwynia/agent-skills) into .claude/skills/worldbuilding in your project. Claude Code loads it when a task matches its description.

How do I install Worldbuilding in Codex?

Run `npx skills add jwynia/agent-skills --skill worldbuilding -a codex`. Or copy the skill folder (skills/creative/fiction/worldbuilding/worldbuilding in jwynia/agent-skills) into .agents/skills/worldbuilding in your project. Codex loads it when a task matches its description.

Can I use Worldbuilding in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add jwynia/agent-skills --skill worldbuilding -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/worldbuilding, .gemini/skills/worldbuilding, .github/skills/worldbuilding and .opencode/skills/worldbuilding in your project.

What does Worldbuilding need to run?

SKILL.md names no scripts, command-line tools or credentials: Worldbuilding is instructions for the agent only. Compatibility (from SKILL.md): Works with any fiction genre. Pairs with story-sense for routing..

Does Worldbuilding access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Worldbuilding safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Worldbuilding use?

Worldbuilding is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Worldbuilding use?

About 1.2k tokens (SKILL.md is roughly 4.8k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Worldbuilding?

Skills that share tags, products or a category with Worldbuilding: Story Multi-Perspective Review (zenstory-ai/oh-story-claudecode, 7.4k stars), Short Web Fiction Trend Scan (zenstory-ai/oh-story-claudecode, 7.4k stars), InkOS Creative Harness (Narcooo/inkos, 10k stars) and Novel Art (eternityspring/shuohao-skills, 4.3k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Worldbuilding?

jwynia (a GitHub user) maintains it in jwynia/agent-skills, which has 170 GitHub stars. The repository holds 111 skills in this directory. The repository was last updated on February 24, 2026.

Source: jwynia/agent-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Worldbuilding

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Compatibility

Context cost

Safety

SKILL.md

Worldbuilding: Diagnostic Skill

When to Use This Skill

Core Principle

The World States

W1: Backdrop World

W2: World Without Consequences

W3: Institutions Without History

W4: Economy Doesn't Make Sense

W5: Belief Systems Are Shallow

W6: Culture Without Depth

W7: Flat Non-Humans

W7.5: Language Feels Generic

Consequence Cascade

Key Diagnostic Questions

For Technology/Magic

For Institutions

For Economics

For Belief Systems

Common Anti-Patterns

The Monoculture

The Convenient Technology

The Static History

The Evil Empire

The Rubber Forehead Alien

Depth vs Breadth

Related Skills

Files

Compare with similar skills

Similar skills

More from jwynia/agent-skills

Related

Questions about Worldbuilding