CaptainsWorld Index

Command centre · Published mirror · Captainswords.app/docs/brain

Current Focus

Now building

Harbour Kit v1 - First Playable Slice

Goal

Prove the loop:

Explore → Discover → Read → Meet → Help → Transform → Continue

Current task

Milestone 0 — walk to the bottle (first 6 assets only):

• water_tile_base
• sand_tile_base
• dock_tile_base
• captain_idle_down
• message_bottle
• sparkle_indicator

Then Milestone 1 — full P0 slice (see Harbour Kit v1 - First Playable Slice).

Track assets in Harbour Kit v1 - Production Workflow.

Do not work on yet

• full lighthouse
• whale bay
• open world
• outfit customization
• AI mission generation
• mobile app
• full story arc

---

What are we building?

A guided top-down educational adventure where children explore islands, help characters through adaptive literacy or maths missions, and watch the world transform as they learn.

Not worksheets. Not mini-games. A mission-driven learning world.

→ Product Vision · Core Loop

---

Current direction

Guided top-down 2D adventure (Pokémon-style navigation, no combat). Learning changes the world.

Renderer (locked): Godot for playable top-down world. SDK engines stay outside Godot.

→ 2026-06-30 Visual Engine and Mission Architecture · CaptainsWorld SDK · Godot MCP Workflow

---

Next slice

Milestone	Proves	Doc
M0	Captain walks on tiny map → sparkling bottle	[[Harbour Kit v1 - First Playable Slice#Milestone 0]]
M1	Bottle → read → Fisherman → net repair	[[Harbour Kit v1 - First Playable Slice#Milestone 1]]
M2	Harbour community (3–5 missions)	[[Harbour Kit v1#15. Production Priority]]

Build prompt: Cursor Build Prompt - First Playable Slice

---

Active blockers

Blocker	Status	Action
Visual production pipeline	Active	P0 assets via Harbour Kit v1 - Production Workflow
Godot project not scaffolded	Next after M0 art	Cursor Build Prompt - First Playable Slice
Harbour Kit art incomplete	In progress	Start with 6 assets, not full kit

Learning engine and story concept are not blockers.

---

Decisions locked

• Guided top-down 2D, not open-world RPG (2026-06-30 Visual Engine and Mission Architecture)
• Mission grammar + 3 UI modes (Mission Grammar · Mission UI Modes)
• Harbour Kit v1 before bespoke scenes (Harbour Kit v1)
• Godot renderer — SDK logic separate from Godot (CaptainsWorld SDK)
• Dumb renderer principle ([[CaptainsWorld SDK#Important principle]])

---

Decisions still open

• Exact Godot MCP workflow (Godot MCP Workflow — stub)
• Captain walk: 4-frame cycle vs placeholder slide for M0
• When to retire Phaser for harbour slice (Renderer Strategy)

---

Production spine (Harbour Kit v1)

• Harbour Kit v1 — spec
• Harbour Kit v1 - Asset Checklist — every asset ID
• Harbour Kit v1 - AI Asset Prompts — generation prompts
• Harbour Kit v1 - Production Workflow — Kanban + weekly rhythm
• Harbour Kit v1 - Asset Metadata Schema — engine import format
• Harbour Kit v1 - First Playable Slice — what to build first

---

Key product areas

• Product Vision · Core Loop · CaptainsWorld SDK
• Mission Grammar · Visual Engine · Scene Compiler
• Harbour Kit v1 · Art Bible · First Arc
• Godot MCP Workflow · Cursor Build Prompt - First Playable Slice

---

Weekly rhythm

See [[Harbour Kit v1 - Production Workflow#Weekly rhythm]].

After each playtest → 99 Decisions/YYYY-MM-DD Playtest Notes.md

---

Full vault map

01 Vision

Product Vision · Core Loop · Design Principles

02 Architecture

CaptainsWorld SDK · Engine Separation · Learning Engine · Story Engine · Mission Engine · Visual Engine · Scene Compiler · Renderer Strategy

03 World Design

Island Structure · Harbour · Old Lighthouse · Whale Bay · Grandpa Mystery

04 Mission System

Mission Grammar · Mission UI Modes · Visual Patterns · NPC Mission Generators · Example Missions

05 Art Direction

Art Bible · Asset Library · Harbour Kit v1 · Harbour Kit v1 - Asset Checklist · Harbour Kit v1 - AI Asset Prompts · Harbour Kit v1 - Production Workflow · Harbour Kit v1 - Asset Metadata Schema · Harbour Kit v1 - First Playable Slice · NPC Asset States · Mission Prop States · Animation Library

06 Captain's Words

Words Product Definition · Literacy Verbs · First Arc

07 Captain's Numbers

Numbers Product Definition · Maths Verbs · Cargo Delivery Example

08 Implementation

Godot MCP Workflow · Cursor Build Prompt - First Playable Slice · Cursor Workflow · SDK to Mobile · MVP Roadmap

99 Decisions

2026-06-30 Visual Engine and Mission Architecture