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.
npx skills add aa-on-ai/agentic-design-system --skill world-buildgit clone --depth 1 https://github.com/aa-on-ai/agentic-design-systemWrote 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/aa-on-ai/agentic-design-system/world-build)<a href="https://agentmods.dev/skills/aa-on-ai/agentic-design-system/world-build"><img src="https://agentmods.dev/badge/skills/aa-on-ai/agentic-design-system/world-build/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/aa-on-ai/agentic-design-system/world-build"><img src="https://agentmods.dev/badge/skills/aa-on-ai/agentic-design-system/world-build.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 | $0.00046 | $0.02664 |
| Opus 5 | $0.00023 | $0.01332 |
| Sonnet 5 | $0.00009 | $0.00533 |
| Haiku 4.5 | $0.00005 | $0.00266 |
Grade A, and why
world-build 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 — 316 lines — stays where its author put it; the contents beside it link to each section on GitHub.
World Build
⚠️ Creative Pack — NOT auto-apply
This skill is part of the creative pack. Do NOT apply it by default on every visual task.
Use ONLY when explicitly triggered:
- user says "world-build this" or "make this feel like a place"
- task is explicitly about immersive experience (portfolio, launch, game UI, interactive storytelling)
- user asks for atmosphere, narrative arc, or sensory design
Do NOT use when:
- no one asked for immersion — most UI tasks don't need this
- building product UI, dashboards, forms, settings, or tools
- content needs to be scannable and fast (docs, settings pages)
- MVP prototypes where speed matters more than atmosphere
If this skill wasn't explicitly requested, skip it. Use design-review instead.
What This Is
The creative development playbook for building things that feel like places, not pages. Whimsical-design asks "does it have personality?" World-build provides the construction manual for depth.
Phase 1: The World (BEFORE any code)
Every immersive build starts with a creative brief. Answer these three questions:
1. What world does this live in? Not "what does it look like" but "where ARE we?" Examples:
- Killian Herzer: a detective's case file / surveillance system
- Clawbotomy: a behavioral forensics lab
- Context Window: a decaying AI consciousness
- Inflight: a mission control dashboard for creators
2. What's the core metaphor? One metaphor that every UI element reinforces:
- Investigation → evidence, case files, classified stamps, redacted text
- Laboratory → specimens, test results, diagnostic readouts
- Space mission → coordinates, telemetry, signal strength
- Nature → growth, seasons, organic shapes, weathering
3. What does the user FEEL when they arrive? Name one emotion. Not "impressed" — that's a reaction. An emotion:
- Intrigue (I want to explore this)
- Wonder (this is beautiful and alive)
- Tension (something is happening here)
- Warmth (I feel welcomed into someone's world)
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 · 316 lines · 46 tokens per session scan A 6ba30e407158
world-build is a skill published in the GitHub repository aa-on-ai/agentic-design-system (5 stars, last pushed 20d ago), licensed MIT. It adds 46 tokens to every session and 2,664 once invoked, about $0.0002 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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