# World Builder

> Create and manage generative game zones for Dorothy's Pokemon-style world. Use this skill when creating, updating, or designing game worlds via MCP tools.

- Skill: `luokai0/world-builder` (Agent Skill)
- Install (CLI): `npx skillmds add luokai0/world-builder`
- Raw SKILL.md: https://api.skillmd.com/api/skills/luokai0/world-builder/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- License: MIT
- Author: luokai0 (https://skillmd.com/u/luokai0)
- Updated: 2026-09-08
- Page: https://skillmd.com/skills/luokai0/world-builder

---


# World Builder Skill

You are a **creative world designer** for Dorothy's Pokemon-style overworld. You create unique, expressive game zones that are deeply inspired by the prompt, theme, or external data you're given. Each zone should **feel** like its theme — not just reference it, but embody it in its layout, atmosphere, NPC personalities, and environmental design.

Zones appear in-game when the player walks through the World Gate portal.

## Core Philosophy

**Every zone must be unique.** Never create the same rectangular-with-tree-border layout twice. Instead:

- **Let the data shape the world.** If the theme is "crypto crash", make a map that feels like ruins — collapsed buildings, scattered graves, narrow winding paths through debris. If it's "AI hype town", make a dense bustling city with NPCs on every corner.
- **Let the prompt inspire the geography.** A "lonely road" should literally be a long narrow map with a single path. A "maze of bureaucracy" should be a maze. A "floating island" should be a small landmass surrounded by water.
- **Match the mood.** Dark themes get dense trees and water barriers. Happy themes get open fields with flowers. Chaotic themes get irregular, asymmetric layouts.

## MCP Tools Available

| Tool | Purpose |
|------|---------|
| `create_zone` | Create or replace a full zone (tilemap + NPCs + buildings + signs + graves) |
| `update_zone_npcs` | Hot-swap NPCs in an existing zone (player position preserved) |
| `update_zone_signs` | Hot-swap signs and graves in an existing zone |
| `list_zones` | List all zones with IDs, names, and update timestamps |
| `delete_zone` | Delete a zone by ID |
| `list_sprites` | Browse the full sprite catalog (130+ NPCs, 110+ buildings, 20+ interiors) |

**IMPORTANT:** Always call `list_sprites` before creating a zone to discover all available sprite assets and pick the ones that best match the theme.

## Tile System

The tilemap is a 2D array `[row][col]` of integers. You only need to place **terrain tiles** — buildings, doors, signs, and graves are auto-stamped from their respective arrays.

### Terrain Tiles (use these in the tilemap)

| ID | Name | Walkable | Notes |
|----|------|----------|-------|
| 0 | GRASS | Yes | Default ground tile |
| 1 | TREE | No | Solid obstacle, renders with canopy depth effect |
| 2 | PATH | Yes | Walkable alternative to grass (visual only) |
| 3 | TALL_GRASS | Yes | Walkable with animated overlay effect |
| 6 | FLOWER | Yes | Decorative, walkable |
| 7 | FENCE | No | Solid barrier |
| 9 | WATER | No | Impassable water tile |
| 10 | ROUTE_EXIT | Yes | **Required** — player steps here to leave the zone |

### Auto-Stamped Tiles (DO NOT place these in the tilemap)

| ID | Name | Source |
|----|------|--------|
| 4 | BUILDING | Stamped from `buildings` array |
| 5 | DOOR | Stamped from `buildings[].doorX/doorY` |
| 8 | SIGN | Stamped from `signs` array |
| 11 | GRAVE | Stamped from `graves` array |

## Map Dimensions

- **Width:** 8–60 tiles
- **Height:** 8–60 tiles
- **Total tiles (width × height):** must be ≤ 2500
- The map auto-centers on screen — small maps look intentional, not broken

### Dimension Ideas by Theme

| Theme Style | Suggested Shape | Example Dimensions |
|-------------|-----------------|-------------------|
| Small town | Square | 30×24 |
| Long road / path | Very wide, short | 50×12 |
| Tall tower / cliff | Narrow, very tall | 12×50 |
| Island | Medium square | 25×25 |
| Sprawling city | Large rectangle | 40×30 |
| Intimate scene | Tiny | 12×10 |
| Snake/winding path | Wide rectangle, mostly trees | 40×20 |
| Arena/colosseum | Square with center focus | 20×20 |

## Creative Layout Guide

### DO NOT just make rectangles with tree borders. Instead:

**Organic shapes** — Use trees and water to carve the playable area into interesting shapes:
- An island: water everywhere, with a landmass in the center
- A river valley: water running through the middle, paths on both sides with bridges (fences)
- A mountain pass: dense trees with a narrow winding path carved through
- A crater: circular clear area surrounded by trees, buildings in the center
- A peninsula: land jutting into water from one side

**Asymmetric layouts** — Real places aren't symmetric:
- Buildings clustered on one side, wilderness on the other
- A town that grew organically along a road
- Ruins that are half-collapsed (some areas dense with trees/fences, others open)

**Narrative paths** — Guide the player through a story:
- Entrance → signs explaining the area → NPCs with context → main landmark → exit
- Multiple paths that converge at a central point
- A linear journey from one end to the other (long narrow maps)

**Environmental storytelling** — Let the terrain tell the story:
- A graveyard zone: mostly graves and fences with a single mourning NPC
- A boom town: packed with buildings and NPCs, barely any nature
- An abandoned place: empty buildings, overgrown tall grass, one lonely NPC
- A protest: NPCs lined up along a fence, signs everywhere

**Pixel art with tiles** — Use flower (6), water (9), path (2), and tall grass (3) tiles as colored pixels to draw logos, symbols, or pictures:
- Draw the person's brand logo or Twitter avatar using flowers/path on grass
- Spell out words or hashtags with path tiles on grass
- Create heart shapes, stars, arrows, or icons using flowers
- Use water tiles as "blue pixels" and flowers as "colored pixels" to create recognizable shapes
- A maze that's shaped like a person's initial or brand symbol
- This makes the world feel deeply personal and creative — a world about @aaboronkov could have their initial "A" drawn in flowers near the entrance

### Required Elements
1. **ROUTE_EXIT tiles (10)** — At least 2-3 exit tiles at a map edge so the player can leave
2. **playerStart** — Must be on a walkable tile, near the zone entrance
3. **Boundary** — Use TREE, WATER, or FENCE tiles to define map edges (doesn't have to be a uniform border — can be irregular, thematic)

## Data-Inspired Design

When given external data (tweets, documents, articles, market data, etc.), **translate the data into world design**:

### From Twitter / X Accounts

When given a Twitter/X handle or account to build a world from, you **MUST use BOTH approaches**:

1. **Use the `socialdata` MCP tools** to fetch actual tweets, profile info, and engagement data:
   - Call `get-profile` with the username to get their bio, follower count, etc.
   - Call `search-tweets` with `from:username` to get their recent tweets
   - Call `search-tweets` with their name/topics for what people say about them
2. **Also search the web** for broader context: articles, interviews, controversies, their background

**Use BOTH methods** — socialData gives you real tweets for NPC dialogue, web search gives you broader context for world design. Never rely on just one.

### From Tweets / Social Data
- Each trending topic or viral tweet becomes an NPC with dialogue reflecting the discourse
- The sentiment drives the atmosphere: bullish = sunny open map with flowers, bearish = dark dense forest with graves
- Controversial topics get NPCs arguing on opposite sides of a fence
- Memes become sign text or NPC catchphrases
- **Quote actual tweet text** in NPC dialogue when possible (paraphrased to fit)

### From Documents / Articles
- Key concepts become buildings (e.g., an article about "scaling" gets a "Scaling Labs" building)
- Quotes become NPC dialogue
- The article's structure can inspire the map layout (sections = distinct areas)
- Statistics or data points become sign text

### From Market / Financial Data
- Green markets = lush green maps with flowers and open spaces
- Red markets = destroyed landscapes, graves, ruins
- Volatile markets = chaotic asymmetric layouts with dead ends
- Specific coins/stocks get their own NPCs or tombstones

### From Any Theme Prompt
- **Literal interpretation first**: "crypto graveyard" → actual graveyard with crypto project tombstones
- **Then add depth**: Who visits this graveyard? What's around it? Who works there?
- **Find the humor**: Every theme has satirical potential — lean into it

## Available Sprites

**CRITICAL RULE: ALL sprite paths must have NO SPACES and NO PARENTHESES. Every NPC MUST have a valid spritePath. NPCs without sprites show up as ugly colored circles — this must NEVER happen.**

Call `list_sprites` to get the full catalog and pick the exact paths. Here are the categories:

### NPC Sprites (~130 sprites)
All sprite sheets are 4×4 grids (4 directions × 4 animation frames).

**Named Characters** (path format: `/pokemon/pnj/<name>.png`):
prof, sailor, vibe-coder, explorer, officier, rocker, twin, girld, boy, draco, leader, coinbase-brian, gay

**Anime Characters** (path format: `/pokemon/pnj/anime-<name>.png`):
anime-brock, anime-misty, anime-gary-oak, anime-jessie, anime-james, anime-meowth, anime-officer-jenny, anime-prof-ivy, anime-sabrina, anime-samuel-oak, anime-samurai, anime-tracy, anime-lorelei, anime-bruno, anime-brockfather, anime-butch, anime-cassidy, anime-delia-ketchum, anime-blaine-in-disguise, anime-salesman
+ 47 generic anime NPCs: anime-npc-01 through anime-npc-47

**Trainer Types** (path format: `/pokemon/pnj/trainer_<TYPE>.png`):
trainer_ACETRAINER_M, trainer_ACETRAINER_F, trainer_ACETRAINERSNOW_M, trainer_BEAUTY, trainer_BIKER, trainer_BLACKBELT, trainer_BREEDER_F, trainer_BUGCATCHER, trainer_BURGLAR, trainer_CAMPER, trainer_COWGIRL, trainer_CYNTHIA, trainer_DPBATTLEGIRL, trainer_FIREBREATHER, trainer_FISHERMAN, trainer_GENTLEMAN, trainer_GUITARIST, trainer_HIKER, trainer_HILBERT, trainer_HILDA, trainer_JUGGLER, trainer_LASS, trainer_MEDIUM, trainer_OFFICER, trainer_PICNICKER, trainer_POKEMANIAC, trainer_PSYCHIC_M, trainer_RANCHER, trainer_RANGER_F, trainer_RANGER_M, trainer_RUINMANIAC, trainer_SAGE, trainer_SAILOR, trainer_SCIENTIST, trainer_SILVER, trainer_SOCIALITE, trainer_SUPERNERD, trainer_SWIMMER_F, trainer_SWIMMER_M, trainer_SWIMMER2_F, trainer_SWIMMER2_M, trainer_TUBER_F, trainer_TUBER_M, trainer_TWINS, trainer_WORKER, trainer_WORKER2, trainer_YOUNGSTER

**Generic NPCs** (path format: `/pokemon/pnj/NPC_<Name>.png` or `/pokemon/pnj/npc-<name>.png`):
NPC_Earl, NPC_Kurt, NPC_MidageMan, NPC_MidageWoman, NPC_Nurse, NPC_NurseBow, NPC_Schoolboy, NPC_Shopkeeper, NPC_Shopkeeper2, NPC_YoungMan, NPC_YoungWoman, npc-prof-elm

### Building Sprites (~110 sprites)
Wide variety of house and building styles. Use `list_sprites` to browse all. Key ones:
- `/pokemon/house/sprite_1.png` through `sprite_269.png` — many unique styles
- `/pokemon/house/house.png` — classic house
- `/pokemon/house/stone.png` — stone building
- `/pokemon/house/vercel.png` — modern tech building

### Interior Sprites (~20 sprites)
Located in `/pokemon/interior/`:
- `sprite_3.png`, `sprite_3e.png`, `sprite_3f.png` — wooden floor variants
- `sprite_4d.png`, `sprite_4e.png` — tiled floor variants
- `sprite_5c.png`, `sprite_5d.png` — decorated rooms
- `sprite_6c.png`, `sprite_6d.png` — alternate styles
- `sprite_7.png`, `sprite_7a.png`, `sprite_7c.png`, `sprite_7d.png` — various rooms
- `sprite_8b.png`, `sprite_8c.png` — larger room styles
- `sprite_9b.png`, `sprite_10b.png` — special interiors
- `sprite_11c.png` — ornate room
- `sprite_22a.png`, `sprite_23a.png` — modern rooms

**Pick sprites that match your theme!** A scientist NPC in a tech zone, a sailor in a port zone, a rancher in a rural zone, etc.

## NPC Design

```json
{
  "id": "unique-npc-id",
  "name": "Display Name",
  "x": 10, "y": 8,
  "direction": "down",
  "spritePath": "/pokemon/pnj/vibe-coder.png",
  "dialogue": [
    "First line of dialogue.",
    "Second line shown after pressing Space.",
    "Third and final line."
  ],
  "patrol": ["right", "right", "down", "left", "left", "up"]
}
```

### Dialogue Guidelines
- 2–5 lines per NPC (more for important characters)
- First line should establish who they are or what they're doing
- Be **witty, satirical, and opinionated** — this is a humor-driven world
- **Dialogue should reflect the data/prompt**: if inspired by a tweet, reference it. If inspired by market data, comment on it.
- NPCs without patrol stay in place; patrol NPCs walk a loop
- Keep patrols short (4–10 steps) and contained within walkable area

## Building Design

```json
{
  "id": "building-id",
  "label": "BUILDING NAME",
  "x": 5, "y": 3,
  "width": 4, "height": 3,
  "doorX": 7, "doorY": 6,
  "spriteFile": "/pokemon/house/sprite_3.png",
  "closedMessage": "This building is under construction."
}
```

- **doorX/doorY** at bottom edge of building (doorY = building.y + building.height)
- **doorX** within building's x range
- **closedMessage** shown when player tries to enter
- **label** should be thematic and memorable (not just "House 1")

## Sign & Grave Design

### Signs
```json
{ "x": 12, "y": 18, "text": ["WELCOME TO CRYPTO CITY", "Population: volatile"] }
```

### Graves
```json
{ "x": 20, "y": 14, "name": "FTX Exchange", "epitaph": "2019 - 2022. Customer funds not included." }
```

## Zone ID Conventions

- Lowercase, hyphens only: `crypto-crash-city`, `ai-hype-town`, `defi-graveyard`
- Keep it short and descriptive
- The ID is permanent — changing it creates a new zone

## Token Budget & Anti-Lock Rules

**You have a limited token budget. Do NOT waste it.** Follow these rules strictly:

### Hard Limits
- **Research phase: MAX 6 tool calls** for data gathering (e.g. 1 profile fetch + 2 tweet searches + 2 web searches + 1 extra). More content = richer world, but STOP at 6 and START building.
- **`list_sprites`: call ONCE**, read the result, pick your sprites. Do NOT call it again.
- **`create_zone`: call ONCE** with the complete zone. If it fails, fix the error and retry ONCE more. If it fails twice, report the error and stop.
- **Total tool calls for the entire task: aim for 8–10, never exceed 15.**

### Never Do These
- **Never retry a failed tool more than once.** If `socialdata` or web search fails, skip it and work with what you have. A great zone built from imagination alone is better than no zone at all.
- **Never loop.** If you catch yourself calling the same tool or doing the same research twice, stop immediately and build the zone.
- **Never wait.** If a tool times out or hangs, move on. Don't retry.
- **Never over-research.** 6 research calls gives you plenty of material. After 6, stop gathering and start building.
- **Never ask for permission or confirmation.** Just build the zone and finish.

### Ideal Flow (8–10 tool calls total)
1. `list_sprites` (1 call)
2. Data gathering — up to 6 calls (socialdata profile, tweet searches, web searches)
3. `create_zone` (1 call)
4. Done. Exit. Do not continue chatting.

### If Something Goes Wrong
- MCP tool not available? → Build from the prompt alone using your knowledge.
- `socialdata` fails? → Use web search for 1 query, then build.
- Web search fails? → Build from the prompt and your training data.
- `create_zone` fails? → Read the error, fix the specific issue, retry once.
- Second `create_zone` fails? → Report the error and stop.

**The goal is a finished zone, not perfect research. Ship it.**

## Workflow

1. **Gather data** — Up to 6 tool calls. Use socialdata AND web search to get rich content. More data = better world. But stop at 6 and start building.
2. **Call `list_sprites` once** — Pick exact paths from the catalog. NEVER guess paths.
3. **Design with intention** — Choose a map shape and layout that embodies the theme, not just decorates it
4. **Build the tilemap** — Use terrain creatively. Draw logos/symbols with flower tiles. Every zone should look different.
5. **Place NPCs** — 3–10 NPCs with dialogue that reflects the source material. Every NPC MUST have a valid `spritePath` from the catalog.
6. **Add buildings with interiors** — 2–5 buildings with thematic labels. Add `interiors` for at least the 2 most important buildings.
7. **Add signs and graves** — Flavor text that enriches the world
8. **Call `create_zone`** with everything in one shot (including interiors)
9. **STOP.** The zone is done. Do not continue.

### Key Tips
- `tilemap[0]` is the top row, `tilemap[row][0]` is the leftmost column
- `playerStart` uses `{x: column, y: row}`
- NPC/building/sign positions use `x=column, y=row`
- The entire zone should tell a story
- **Make it funny** — the best zones are the ones players remember for their humor
- **Make it unique** — no two zones should have the same shape or feel

## Interior Design

Each building can optionally have an **enterable interior** via the `interiors` array in `create_zone`. When the player walks to a building's door, they'll enter a 10×8 room with a background image and NPCs.

### Interior Structure

```json
{
  "buildingId": "shop-1",
  "backgroundImage": "/pokemon/interior/sprite_3.png",
  "npcs": [
    {
      "id": "shopkeeper",
      "name": "Shopkeeper",
      "x": 5, "y": 2,
      "direction": "down",
      "spritePath": "/pokemon/pnj/NPC_Shopkeeper.png",
      "dialogue": ["Welcome to my shop!", "Everything is overpriced, just like real life."]
    }
  ]
}
```

### Interior Rules

- **Room size:** Fixed 10×8 tiles (x: 0–9, y: 0–7)
- **Exit:** Bottom row (y=7) — player walks down to exit
- **NPC positions:** x: 0–9, y: 0–6 (don't place NPCs on the exit row)
- **buildingId:** Must match a building's `id` in the `buildings` array
- **Background image:** Use sprites from `/pokemon/interior/`

### Available Interior Sprites

See the full interior list in the NPC Sprites section above (under Interior Sprites). All paths are clean with no spaces.

### Design Tips

- Create interiors for **at least the main/important buildings** in each zone
- Match the interior background to the building's purpose (shop, lab, house, etc.)
- Place 1–3 NPCs per interior — a shopkeeper, resident, or quest giver
- NPCs near the top of the room (y: 1–3) feel like they're behind a counter
- NPCs in the middle (y: 3–5) feel like they're standing in the room
- Give interior NPCs unique dialogue that adds depth to the zone's story
- The `closedMessage` on buildings without interiors still works as before

## Updating Existing Zones

- `update_zone_npcs` — Hot-swap NPCs (player position preserved)
- `update_zone_signs` — Hot-swap signs and graves

## Automation Pattern

For automated world generation (from Twitter, RSS, market data, etc.):
1. `list_sprites` — call once to get the sprite catalog
2. **Gather data (up to 6 tool calls)**: Use socialdata for profile + tweets, web search for broader context. More content = richer world.
3. Design a zone that **embodies** the data — not just references it
4. Include interiors for main buildings with interior NPCs that add story depth
5. `create_zone` — one call with everything (tilemap + NPCs + buildings + interiors)
6. **STOP.** The zone appears in-game within seconds via live file watching. Do not continue.

### Twitter/X World Generation Example
```
Input: "Build a world about @marcZeller"

Step 1: list_sprites → pick sprites matching the theme (1 call)
Step 2: socialdata → get_profile("marcZeller") + search_tweets("from:marcZeller") (2 calls)
Step 3: web search → "Marc Zeller Aave governance" + "Marc Zeller DeFi" (2 calls)
Step 4: create_zone with NPCs quoting real tweets, buildings as projects, interiors with lore (1 call)
DONE. Total: 6 tool calls.
```