# AI-Powered Dungeon Master Toolkit

*A local, offline-first desktop app built with **Tauri v2** + **Rust** that gives you every tool a DM needs — all powered by a local LLM.*

> **TL;DR**
> 1. Scaffold a Tauri v2 project.
> 2. Add Rust bindings to a local LLM (`llama-cpp-2`, `llama_cpp`, or Candle).
> 3. Build modular "utilities" (World Builder, NPC Generator, Encounter Designer, etc.).
> 4. Wire them up in the front-end via `tauri.invoke` + Tauri Channels for streaming.
> 5. Package and ship — no internet required after first run.

---

## Table of Contents

1. [What a DM Needs](#1-what-a-dm-needs)
2. [System Architecture](#2-system-architecture)
3. [Quick Start — Boilerplate](#3-quick-start--boilerplate)
4. [Local LLM Integration](#4-local-llm-integration)
5. [Core Utilities & AI Features](#5-core-utilities--ai-features)
6. [Front-End Architecture (React/TS)](#6-front-end-architecture-reactts)
7. [Design System — Visual Language](#7-design-system--visual-language)
8. [UI/UX Feature Design](#8-uiux-feature-design)
9. [Data Persistence](#9-data-persistence)
10. [Model Management UX](#10-model-management-ux)
11. [Lore Search / RAG](#11-lore-search--rag)
12. [Security & Legal Considerations](#12-security--legal-considerations)
13. [Optional Enhancements](#13-optional-enhancements)
14. [Resources & Quick Links](#14-resources--quick-links)
15. [Development Checkpoints](#15-development-checkpoints)
16. [Final Checklist](#16-final-checklist)

---

## 1. What a DM Needs

| Category | Typical Items | AI-Powered Utility |
|----------|---------------|--------------------|
| **World & Setting** | Campaign bible, maps, lore notes | Auto-generate continents, history timelines, religions, backstory snippets |
| **NPCs & Factions** | Sheets for each character, relationships | Create NPC bios, personality traits, dialogue hooks, agenda charts, relationship webs |
| **Plot / Quests** | Story arcs, side quests, beats | Draft story outlines, branching choices, plot twists |
| **Encounters** | Enemy lists, terrain descriptions | Generate balanced combat encounters, environmental modifiers, loot tables |
| **Magic & Items** | Item descriptions, stats, rarity | Forge unique items with lore, backstory, and mechanical effects |
| **Maps** | Tile sets, hand-drawn maps | Render vector/raster terrain, city layouts; fog-of-war overlays |
| **Player Materials** | Character sheets, handouts | Auto-populate sheets from templates; generate handouts/flashcards |
| **Session Management** | Logbook, notes, schedule | Track session logs, note highlights, future hook suggestions |
| **Initiative / Combat Tracker** | Turn order, HP, conditions, round timer | Visual combat tracker with condition tracking |
| **Dice & RNG** | Physical dice | Simulate dice rolls, record outcomes; random table roller |
| **Rule Reference** | PHB, DMG, 5e SRD | Lookup rules (SRD/CC-BY content only), convert stats across editions |
| **Calendar & Weather** | Fantasy calendar, seasonal events | Custom calendar system with weather generation |
| **Soundboard / Ambience** | Audio clips | Local audio playback for tavern, combat, forest ambience |
| **Name Generators** | Fantasy, sci-fi, historical name banks | AI-powered or procedural name generation |
| **Puzzle / Trap Designer** | Skill-check flows, trap DCs, hints | Generate puzzle mechanics, trap stat blocks |
| **Homebrew Importer** | Custom classes, spells, monsters | Import from Markdown/JSON templates |

---

## 2. System Architecture

```
┌────────────────────────────────────┐
│       Front-End (TS / React)       │
│   Tauri v2 WebView · Capabilities  │
│   UI · Map Viewer · Dialog Editor  │
│   Drag-and-Drop · File Explorer     │
└───────────────▲────────────────────┘
                │
        invoke() / Channel
                │
┌───────────────┴────────────────────┐
│       Rust Back-End (Tauri API)    │
│   Business Logic · LLM Inference   │
│   File I/O · Session Storage        │
├───────────────▲────────────────────┤
│               │                     │
│   llama-cpp-2 │   SQLite / JSON    │
│   (local GGUF)│   Storage Layer    │
└───────────────┴────────────────────┘
```

### Key Points

- **Offline-first**: Core LLM runs locally via GGUF. Remote API is optional for higher-capacity models.
- **Tauri v2 security**: UI runs in a sandboxed WebView; all file/system access gated by capability permissions.
- **Plug-in-style utilities**: Each tool is a separate feature flag — start with "World Builder", add "Encounter Designer" later.
- **Recommended Tauri plugins**:

| Plugin | Purpose |
|--------|---------|
| `tauri-plugin-store` | User settings, UI state, recent campaigns |
| `tauri-plugin-fs` | Read/write campaign JSON/Markdown files |
| `tauri-plugin-dialog` | Open/save dialogs for campaigns and maps |
| `tauri-plugin-sql` | SQLite for indexed NPC/location/loot lookup |
| `tauri-plugin-log` | Structured logs from Rust and TS |
| `tauri-plugin-updater` | Auto-updates for app and model packs |
| `tauri-plugin-single-instance` | Prevent multiple app windows |
| `tauri-plugin-window-state` | Remember window size/position |

### Tauri v2 Capabilities

Create `src-tauri/capabilities/default.json`:

```json
{
  "$schema": "../gen/schemas/desktop-schema.json",
  "identifier": "default",
  "description": "Main DM toolkit capability",
  "windows": ["main"],
  "permissions": [
    "core:default",
    "store:default",
    "fs:default",
    "dialog:default",
    "shell:allow-open",
    "http:default"
  ]
}
```

For scoped file access:

```json
{
  "identifier": "fs:allow-read-text-file",
  "allow": [{ "path": "$APPDATA/dm-toolkit/**" }]
}
```

---

## 3. Quick Start — Boilerplate

### Prerequisites

```bash
# Rust & Cargo
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
source $HOME/.cargo/env

# Node (for front-end tooling)
brew install node  # macOS / Linux; or use nvm

# Tauri v2 CLI
npm install -D @tauri-apps/cli@latest
```

### Scaffold

```bash
npm create tauri-app@latest dm-toolkit -- --template react-ts
cd dm-toolkit
npm install
npm run tauri dev
```

> **Note**: Tauri v2 scaffolds both `src-tauri/src/lib.rs` and `src-tauri/src/main.rs` (mobile/desktop share the lib). Import commands from `@tauri-apps/api/core`, not the old v1 path.

### Add Dependencies

```bash
# LLM binding — pick one:
cargo add llama-cpp-2    # mature, tracks upstream llama.cpp
# cargo add llama_cpp     # higher-level, easier to start
# cargo add candle-core   # pure-Rust alternative (no C++ build deps)

# Remote API fallback
cargo add reqwest

# Storage
cargo add serde_json
cargo add sqlx            # or use tauri-plugin-sql
```

---

## 4. Local LLM Integration

### 4.1 Using `llama-cpp-2` (Recommended)

`llama-cpp-2` is a mature Rust binding that tracks the upstream llama.cpp project. The real API requires: init backend → load GGUF → create context → tokenize prompt → `decode()` batch → sampling loop → decode token-by-token.

```rust
// src-tauri/src/llm.rs
use std::path::PathBuf;
use std::sync::Arc;
use llama_cpp_2::llama_backend::LlamaBackend;
use llama_cpp_2::model::LlamaModel;
use llama_cpp_2::model::params::LlamaModelParams;
use llama_cpp_2::context::params::LlamaContextParams;

pub struct LlmState {
    model: Arc<LlamaModel>,
    backend: LlamaBackend,
}

impl LlmState {
    pub fn new(model_path: &str) -> anyhow::Result<Self> {
        let backend = LlamaBackend::init()?;
        let model = LlamaModel::load_from_file(
            &backend,
            model_path,
            &LlamaModelParams::default(),
        )?;
        Ok(Self { model: Arc::new(model), backend })
    }

    pub fn generate(&self, prompt: &str, max_tokens: usize, temperature: f32) -> anyhow::Result<String> {
        let mut ctx = self.model.new_context(&self.backend, LlamaContextParams::default())?;
        let tokens = self.model.str_to_token(prompt, llama_cpp_2::model::AddBos::Always)?;
        // ... decode batch, sampling loop, collect output tokens ...
        // (Full implementation in llama-cpp-2 examples)
        todo!("Implement sampling loop")
    }
}
```

> **Tip** — Keep model files in `$APPDATA/dm-toolkit/models/`. On first run, ship a small base model and let the user download heavier ones later.

### 4.2 Streaming Tokens via Tauri Channels

`invoke()` returns a single promise, **not** a stream. For streaming LLM tokens, use **Tauri Channels** (`Channel<T>`) or the **event system** (`app.emit()` + frontend `listen()`).

#### Rust — Streaming Command

```rust
use tauri::ipc::Channel;
use serde::Serialize;

#[derive(Clone, Serialize)]
#[serde(tag = "type", content = "payload", rename_all = "camelCase")]
enum LlmEvent {
    Token(String),
    Error(String),
    Done,
}

#[tauri::command]
async fn generate_stream(
    state: tauri::State<'_, LlmState>,
    prompt: String,
    max_tokens: i32,
    channel: Channel<LlmEvent>,
) -> Result<(), String> {
    tauri::async_runtime::spawn(async move {
        // Init backend, load model, create context, tokenize...
        // For each decoded token:
        //   channel.send(LlmEvent::Token(piece)).ok();
        // When done:
        //   channel.send(LlmEvent::Done).ok();
    });
    Ok(())
}
```

#### Front-End — Consuming the Stream

```tsx
import { invoke, Channel } from "@tauri-apps/api/core";

async function streamGenerate(prompt: string) {
  const onToken = new Channel<LlmEvent>();
  onToken.onmessage = (event) => {
    switch (event.type) {
      case "Token": appendText(event.payload); break;
      case "Error": console.error(event.payload); break;
      case "Done": setStreaming(false); break;
    }
  };

  await invoke("generate_stream", { prompt, maxTokens: 512, channel: onToken });
}
```

### 4.3 Optional Remote API Fallback

```rust
// src-tauri/src/api.rs
use reqwest::Client;
use serde_json::json;

pub async fn query_openai(prompt: &str) -> anyhow::Result<String> {
    let client = Client::new();
    let res = client.post("https://api.openai.com/v1/chat/completions")
        .bearer_auth(std::env::var("OPENAI_API_KEY")?)
        .json(&json!({
            "model": "gpt-4o-mini",
            "messages": [{ "role": "user", "content": prompt }],
            "max_tokens": 512
        }))
        .send()
        .await?
        .json::<serde_json::Value>()
        .await?;
    Ok(res["choices"][0]["message"]["content"].as_str().unwrap_or("").to_string())
}
```

> **Important**: GPT-4o-mini is a **remote API model**, not local. Keep local inference via GGUF and use remote APIs only as an optional fallback.

---

## 5. Core Utilities & AI Features

Each module exposes a **Tauri command** (`#[tauri::command]`) that the front-end calls via `invoke`.

| Module | Key AI Tasks | Sample Prompt |
|--------|-------------|---------------|
| **World Builder** | Generate continent names, climate zones, major cities, mythic legends | *"Create a fantasy continent with 3 climates and one legendary creature."* |
| **NPC Generator** | Personality traits, background story, NPC goals, relationship webs | *"Generate a charismatic dwarf blacksmith who despises elves."* |
| **Quest Designer** | Multi-step plot arcs, branching outcomes, hooks | *"Outline a 4-chapter quest where the party seeks the lost crown of Rithor."* |
| **Encounter Builder** | Balanced monster groups, terrain modifiers, loot tables | *"Design an urban ambush for level-5 PCs with 3 bandits and a surprise mob."* |
| **Item Forge** | Stat tables, lore sentences, rarity levels | *"Create a +2 longsword of fire resistance that grants invisibility once per day."* |
| **Initiative Tracker** | Turn order, HP/conditions, round timer | Manage combat state, auto-sort by initiative |
| **Random Tables** | Roll on customizable tables | Treasure, encounters, names, weather |
| **Calendar & Weather** | Fantasy calendar, seasonal events | Custom calendar system with weather |
| **Soundboard** | Local audio clips | Tavern, combat, forest ambience |
| **Map Generator** | Procedural terrain, fog-of-war overlay | Use `react-konva` or `fabric.js` with offline vector tiles |
| **Dice Roller** | 1-to-6 dice + custom pools | *"Roll 4d8+2."* |
| **Session Logger** | Summarize actions, suggest next hooks | *"Summarize last session and propose a hook for the next meeting."* |
| **Puzzle / Trap Designer** | Skill-check flows, trap DCs, hints | Generate puzzle mechanics and trap stat blocks |
| **Name Generator** | Fantasy, sci-fi, historical name banks | Procedural or AI-powered name generation |
| **Homebrew Importer** | Import custom content | Markdown/JSON templates for classes, spells, monsters |
| **Handout Renderer** | Markdown → styled handout → export PNG/PDF | Generate player handouts |

### Example: NPC Generator Command

```rust
// src-tauri/src/commands/npc.rs
use tauri::command;

#[derive(serde::Deserialize)]
pub struct NpcRequest {
    pub name: Option<String>,
    pub race: String,
    pub class: String,
    pub alignment: String,
}

#[derive(serde::Serialize)]
pub struct NpcResponse {
    pub bio: String,
    pub personality: Vec<String>,
    pub goals: Vec<String>,
}

#[command]
pub fn generate_npc(req: NpcRequest) -> anyhow::Result<NpcResponse> {
    let prompt = format!(
        "Create a detailed NPC profile:\n\
         Name: {}\nRace: {}\nClass: {}\nAlignment: {}\n\n\
         Output in JSON with keys bio, personality (array), goals (array).",
        req.name.unwrap_or_else(|| "Unnamed".into()),
        req.race, req.class, req.alignment
    );
    let raw = crate::llm::generate(&prompt, 512)?;
    let parsed: NpcResponse = serde_json::from_str(&raw)?;
    Ok(parsed)
}
```

---

## 6. Front-End Architecture (React/TS)

### State Management

| Concern | Recommended Tool |
|---------|------------------|
| UI state | **Zustand** or **Jotai** |
| Rust command data | **TanStack Query** (React Query) |
| Type-safe bindings | **`tauri-specta`** — generates TS types from Rust commands |

### Key Libraries

| Need | Library |
|------|---------|
| Map canvas, tokens, fog-of-war | `react-konva` or `fabric.js` |
| Quest / relationship graphs | `react-flow` |
| Markdown editing | `@uiw/react-md-editor` |
| Dice 3D animation | Three.js / `react-three-fiber` (optional) |
| Layout & styling | **`tailwindcss`** + CSS Grid — bento layouts, design tokens |
| Glassmorphism & motion | **`framer-motion`** (hover/press animations), native `backdrop-filter` |
| Icons | **`lucide-react`** — clean, consistent line icons |
| Scrollable panels | **`@radix-ui/react-scroll-area`** — for overflow in bento cards |

---

## 7. Design System — Visual Language

The app should feel like a *magical interface* — a DM's arcane console. The aesthetic is **dark, luminous, and tactile**: deep navy backgrounds with gold accents, glass cards that glow softly, and bento layouts that put every tool within reach without clutter.

### 7.1 Color Palette

| Token | Hex | Usage |
|-------|-----|-------|
| `--bg-deep` | `#0a0e1a` | App background, outer chrome |
| `--bg-surface` | `#111827` | Sidebar, navigation panels |
| `--bg-card` | `#1a2236` | Bento card surfaces |
| `--bg-card-hover` | `#1f2a42` | Hover state on cards |
| `--border-glass` | `rgba(212, 175, 55, 0.12)` | Glass card borders (gold-tinted) |
| `--border-subtle` | `rgba(255, 255, 255, 0.06)` | Dividers, separators |
| `--gold-bright` | `#d4af37` | Primary accent — CTAs, active states, headings |
| `--gold-muted` | `#a8872a` | Secondary accent — secondary buttons, icons |
| `--gold-glow` | `rgba(212, 175, 55, 0.25)` | Glow halos, focus rings, box-shadows |
| `--text-primary` | `#e8e0d0` | Main body text (warm off-white) |
| `--text-secondary` | `#8b9bb4` | Muted text, labels, descriptions |
| `--text-dim` | `#4a5568` | Disabled / placeholder text |
| `--danger` | `#ef4444` | Error, delete, HP-zero |
| `--success` | `#22c55e` | Success, save, HP-full |
| `--info` | `#3b82f6` | Informational highlights |

### 7.2 Glassmorphism

Every bento card uses the same glass treatment:

```css
.glass-card {
  background: rgba(26, 34, 54, 0.55);       /* --bg-card at 55% opacity */
  backdrop-filter: blur(18px) saturate(1.3);
  -webkit-backdrop-filter: blur(18px) saturate(1.3);
  border: 1px solid rgba(212, 175, 55, 0.12); /* --border-glass */
  border-radius: 16px;
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.03),
    0 2px 8px rgba(0, 0, 0, 0.4),
    inset 0 1px 0 rgba(255, 255, 255, 0.04);
  transition: box-shadow 0.2s, border-color 0.2s;
}

.glass-card:hover {
  border-color: rgba(212, 175, 55, 0.25); /* --border-glass brightened */
  box-shadow:
    0 0 20px rgba(212, 175, 55, 0.08),     /* --gold-glow halo */
    0 4px 16px rgba(0, 0, 0, 0.5),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
}
```

**Rules of thumb:**
- Glass cards sit on top of a subtle radial gradient or a dim background image (map, parchment texture). The blur lets the background bleed through just enough to feel *alive*.
- On hover, a soft gold glow appears — like candlelight catching the edge of a scroll.
- Active/selected cards get a brighter gold border (`--gold-bright`) and a stronger glow.
- Never use full opacity backgrounds inside bento cards — the glass effect is the identity.

### 7.3 Bento Grid Layout

The main dashboard is a **CSS Grid bento** — asymmetric tiles that pack related tools together. No sidebars-within-sidebars; everything is a card on the grid.

```
┌──────────────┬─────────┬─────────┐
│              │  NPC    │  Dice   │
│  World Map   │ Sheet   │ Roller  │
│  (2×2)       │ (1×1)   │ (1×1)   │
│              ├─────────┴─────────┤
│              │                  │
├──────────────┤   Session Log    │
│ Encounter    │   (2×1)         │
│ Builder      │                  │
│ (1×1)        ├────────┬────────┤
│              │Initi-  │ Random │
├──────────────┤ative   │ Tables │
│  Quest       │ Tracker│ (1×1)  │
│  Designer    │ (1×1)  │        │
│  (2×1)       │        │        │
└──────────────┴────────┴────────┘
```

**Implementation** (Tailwind + CSS Grid):

```tsx
// Each bento card is a <BentoCard> wrapper around the real component.
function BentoCard({
  children,
  className,
  span = "col-span-1 row-span-1",
}: Props) {
  return (
    <div className={`glass-card p-4 ${span} ${className ?? ""}`}>
      {children}
    </div>
  );
}

// Dashboard grid
<div className="grid grid-cols-4 grid-rows-4 gap-3 p-4 h-screen bg-bg-deep">
  <BentoCard span="col-span-2 row-span-2"><WorldMap /></BentoCard>
  <BentoCard span="col-span-1 row-span-1"><NpcSheet /></BentoCard>
  <BentoCard span="col-span-1 row-span-1"><DiceRoller /></BentoCard>
  <BentoCard span="col-span-1 row-span-1"><EncounterBuilder /></BentoCard>
  <BentoCard span="col-span-2 row-span-1"><SessionLog /></BentoCard>
  <BentoCard span="col-span-2 row-span-1"><QuestDesigner /></BentoCard>
  <BentoCard span="col-span-1 row-span-1"><InitiativeTracker /></BentoCard>
  <BentoCard span="col-span-1 row-span-1"><RandomTables /></BentoCard>
</div>
```

**Bento rules:**
- Cards are **draggable/resizable** — DMs can reorganize their workspace per session.
- Layout preferences persist to `tauri-plugin-store`.
- On narrow windows (laptop), the grid collapses to a 2-column flow.
- Each card header has a subtle gold underline and a `lucide-react` icon.

### 7.4 Typography

| Element | Font | Weight | Size |
|---------|------|--------|------|
| App title / H1 | *Cinzel* (serif display) | 700 | 28px |
| Card headings / H2 | *Cinzel* | 600 | 18px |
| Body text | *Inter* (sans-serif) | 400 | 14px |
| Code / stat blocks | *JetBrains Mono* | 400 | 13px |
| Dice results / numbers | *JetBrains Mono* | 700 | 24px |

Self-host the fonts (offline-first!):

```css
@font-face { font-family: 'Cinzel'; src: url('/fonts/Cinzel-SemiBold.woff2'); font-weight: 600; }
@font-face { font-family: 'Cinzel'; src: url('/fonts/Cinzel-Bold.woff2'); font-weight: 700; }
@font-face { font-family: 'Inter'; src: url('/fonts/Inter-Regular.woff2'); font-weight: 400; }
@font-face { font-family: 'Inter'; src: url('/fonts/Inter-Medium.woff2'); font-weight: 500; }
@font-face { font-family: 'Inter'; src: url('/fonts/Inter-SemiBold.woff2'); font-weight: 600; }
@font-face { font-family: 'JetBrains Mono'; src: url('/fonts/JetBrainsMono-Regular.woff2'); font-weight: 400; }
@font-face { font-family: 'JetBrains Mono'; src: url('/fonts/JetBrainsMono-Bold.woff2'); font-weight: 700; }
```

### 7.5 Micro-interactions & Motion

| Interaction | Effect |
|-------------|--------|
| Card hover | Gold border brightens; subtle gold `box-shadow` glow fades in (0.2s) |
| Card press / active | Scale down to `0.985`; inner shadow deepens |
| Dice roll | Dice tumbles with `framer-motion` spring; result number scales in with a gold flash |
| AI generation typing | Streamed tokens fade in character-by-character with a gold cursor |
| Tab / panel switch | Crossfade (150ms) — no hard jumps |
| Drag bento card | Card lifts (scale 1.03, shadow deepens); drop zone outlines pulse gold |
| HP bar change | Smooth width transition (300ms); color shifts from `--success` → `--danger` as HP drops |
| Notification / toast | Slides in from top-right with gold left border; auto-dismisses after 4s |

### 7.6 Component Sketch — BentoCard

```tsx
// BentoCard.tsx — the building block of the entire UI
interface BentoCardProps {
  title: string;
  icon: React.ReactNode;          // lucide-react icon
  span?: string;                   // tailwind grid span classes
  children: React.ReactNode;
}

export function BentoCard({ title, icon, span = "col-span-1 row-span-1", children }: BentoCardProps) {
  return (
    <motion.div
      className={`glass-card flex flex-col overflow-hidden ${span}`}
      whileHover={{ scale: 1.005 }}
      whileTap={{ scale: 0.985 }}
      transition={{ type: "spring", stiffness: 400, damping: 25 }}
    >
      {/* Header */}
      <div className="flex items-center gap-2 pb-2 mb-3 border-b border-[var(--border-glass)]">
        <span className="text-[var(--gold-bright)]">{icon}</span>
        <h2 className="font-cinzel text-sm font-semibold tracking-wide text-[var(--text-primary)]">
          {title}
        </h2>
      </div>
      {/* Body */}
      <div className="flex-1 overflow-y-auto scrollbar-thin">
        {children}
      </div>
    </motion.div>
  );
}
```

### 7.7 App Shell Layout

```
┌────────────────────────────────────────────────────────────┐
│  ⚔ DM-Pal          [Campaign ▾]     [⚙]  [_ □ ✕]       │  ← Title bar (Tauri custom)
├────┬───────────────────────────────────────────────────────┤
│ 🗺 │                                                       │
│ 👤 │            Bento Grid Dashboard                       │
│ ⚔ │                                                       │
│ 🎲 │   ┌──────────┬─────────┬─────────┐                   │
│ 📜 │   │ WorldMap │ NPC     │ Dice    │                   │
│ 🎵 │   │  2×2     │ Sheet   │ Roller  │                   │
│ ⚙ │   │          ├─────────┴─────────┤                   │
│    │   │          │   Session Log     │                   │
│    │   ├──────────┤   2×1             │                   │
│    │   │Encounter ├────────┬─────────┤                   │
│    │   │Builder   │Init.   │ Random  │                   │
│    │   └──────────┴────────┴─────────┘                   │
└────┴───────────────────────────────────────────────────────┘
```

- **Left rail** (56px): icon-only nav, dark surface (`--bg-surface`), gold active indicator.
- **Top bar**: Tauri custom title bar with app name in Cinzel, campaign dropdown, settings gear.
- **Main area**: the bento grid, padded, on `--bg-deep` with a subtle radial gradient center for depth.
- Cards are user-rearrangeable; layout saves to local store.

### 7.8 Dark Mode Is the Only Mode

This app is **dark-only**. The dark blue + gold palette *is* the brand — it evokes candlelit tavern tables and starlit skies. There is no light mode toggle. All design tokens above are tuned for dark backgrounds:

- Text contrast ratios meet WCAG AA on `--bg-card`.
- Gold accents provide vibrancy without neon.
- Glass blur prevents the UI from feeling flat while keeping readability.
- Error/success states use bright red/green that pop against navy.

---

## 8. UI/UX Feature Design

How each feature surfaces in the bento dashboard:

| Feature | Bento Card Design |
|---------|-------------------|
| **World Map** | Large 2×2 card; interactive canvas with zoom, draggable tokens (SVG/Canvas), overlaid lore pins. Background layer is the map image; glass overlay panels for region info on hover. |
| **NPC Sheet** | 1×1 card; gold-bordered portrait area at top; scrollable stats/bio below. AI-generated text streams in with a typing cursor. Tap the ✨ icon to regenerate. |
| **Encounter Board** | 1×1 card; mini monster tokens dragged onto a terrain thumbnail; difficulty badge (color from `--success` → `--danger`). Tap to expand into a full-screen overlay. |
| **Session Log** | Wide 2×1 card; Markdown editor on the left, AI summary panel on the right (glass panel). Timeline of dice rolls and events with gold timestamps. |
| **Dice Roller Panel** | 1×1 card; big result number in JetBrains Mono 700/24px. Roll history as a subtle scrolling list below. 3D tumble animation on roll. |
| **Initiative Tracker** | 1×1 card; vertical list of combatants, gold border on active turn. HP bars animate from green → red. Condition badges are small glass pills. |
| **Relationship Web** | Full-screen overlay; `react-flow` graph on dark background. Edges colored by sentiment (gold = ally, red = hostile, blue = neutral). |
| **Soundboard** | 1×1 card; grid of small glass buttons with waveform icons. Active ambience glows gold. Volume slider on each tile. |
| **Quest Designer** | 2×1 card; branching flowchart (`react-flow`) with gold connector lines. Nodes are glass cards. AI-suggest button pulses gold when ready. |
| **Calendar & Weather** | 1×1 card; mini calendar grid with gold today-marker. Weather icon per day. Tap to see forecast details in a glass overlay. |

---

## 9. Data Persistence

Two complementary storage layers:

| Layer | What it stores | Implementation |
|-------|----------------|----------------|
| **JSON / Markdown files** | World bible, session logs, character sheets — human-editable, shareable | `tauri-plugin-fs`, `$APPDATA/dm-toolkit/data/` |
| **SQLite** | Indexed search across NPCs, locations, items, tags, relationships | `tauri-plugin-sql` (sqlite feature) or `sqlx` with WAL mode + migrations |

### SQLite Migrations

```rust
use tauri_plugin_sql::{Migration, MigrationKind, Builder};

fn main() {
    let migrations = vec![Migration {
        version: 1,
        description: "create_campaign_tables",
        sql: "CREATE TABLE npcs (
                id INTEGER PRIMARY KEY,
                name TEXT,
                race TEXT,
                bio TEXT,
                tags TEXT
              );",
        kind: MigrationKind::Up,
    }];

    tauri::Builder::default()
        .plugin(
            Builder::default()
                .add_migrations("sqlite:campaign.db", migrations)
                .build(),
        )
        .run(tauri::generate_context!())
        .expect("error while running tauri application");
}
```

### File Persistence Command

```rust
use tauri::path::BaseDirectory;

#[tauri::command]
async fn save_campaign(
    app: tauri::AppHandle,
    name: String,
    data: serde_json::Value,
) -> Result<(), String> {
    let path = app
        .path()
        .resolve(format!("campaigns/{}.json", name), BaseDirectory::AppData)
        .map_err(|e| e.to_string())?;

    std::fs::create_dir_all(path.parent().unwrap()).map_err(|e| e.to_string())?;
    std::fs::write(&path, serde_json::to_string_pretty(&data).unwrap())
        .map_err(|e| e.to_string())?;
    Ok(())
}
```

> **Tip**: Use WAL mode for concurrent reads, run migrations on startup, and periodic `VACUUM INTO` for backups.

---

## 10. Model Management UX

Local LLMs are not "fire and forget." Plan for:

| Concern | Implementation |
|---------|---------------|
| **First-run wizard** | Detect RAM/VRAM → recommend model size → download GGUF from HuggingFace |
| **Model library UI** | List installed models, quant level, file size, license, hardware fit |
| **Loading state** | Model load can take 5–30 s on HDD/CPU. Show progress bar and cancel button |
| **GPU offloading** | Expose `n_gpu_layers` slider per model |
| **Context length** | 2k/4k/8k selector with memory warning |
| **Generation controls** | Streaming toggle, temperature, top-p, repeat-penalty per tool |
| **License acceptance** | First-run "model license + download" wizard; don't silently bundle 4 GB models |

---

## 11. Lore Search / RAG

To keep AI-generated content consistent with your world:

1. **Chunk** your world bible into embeddings (local embedding model or llama.cpp embeddings).
2. **Store** vectors in `sqlite-vec` extension or Qdrant-lite for semantic recall.
3. **Inject** relevant lore into LLM prompts before generating content so outputs stay consistent.

---

## 12. Security & Legal Considerations

- **Rule content**: Use **5e SRD / OGL / CC-BY** content only for built-in rule lookups. Full PHB/DMG text is copyrighted.
- **AI output**: AI-generated names, places, and stat blocks can still resemble Wizards IP — add a disclaimer and content moderation toggle.
- **Model licenses**: Model files ship under their own licenses (e.g., Llama 3 requires accepting Meta's license). Build a first-run license acceptance flow.
- **Tauri v2 security**: All file/system access goes through Rust and capability permissions — no arbitrary code execution from the WebView.

---

## 13. Optional Enhancements

| Feature | Implementation Hint |
|---------|----------------------|
| **Plugin System** | Load dynamic libraries (`.so/.dll`) that expose additional commands; register via Tauri's IPC at runtime |
| **Community Share Hub** | Sync campaigns via P2P or Git repo (DMs can clone and pull) |
| **Multiplayer Mode** | Use `tauri::ipc` over WebSocket to synchronize DM/player states in real time |
| **Voice-to-Text** | Integrate Whisper for dictating notes or NPC dialogues |
| **Custom Fine-Tuning** | Store prompt libraries locally; fine-tune the local model on your campaign data |

---

## 14. Resources & Quick Links

- **Tauri v2 Docs** — https://tauri.app/
- **Rust Book** — https://doc.rust-lang.org/book/
- **llama-cpp-2 (Rust bindings)** — https://github.com/utilityai/llama-cpp-rs
- **OpenAI API** — https://platform.openai.com/docs/api-reference/chat/create
- **React Flow** — https://reactflow.dev/
- **SQLite + SQLx** — https://docs.rs/sqlx/latest/sqlx/
- **tauri-specta** — https://github.com/specta-rs/tauri-specta
- **react-konva** — https://github.com/konvajs/react-konva
- **Tailwind CSS** — https://tailwindcss.com/
- **Framer Motion** — https://www.framer.com/motion/
- **Lucide Icons** — https://lucide.dev/
- **Cinzel Font** — https://fonts.google.com/specimen/Cinzel
- **Inter Font** — https://fonts.google.com/specimen/Inter

---

## 15. Development Checkpoints

### Milestone 1 — Skeleton & Hello World
- [ ] Scaffold with `npm create tauri-app@latest` (react-ts template)
- [ ] Configure Tauri v2 capabilities (`src-tauri/capabilities/default.json`)
- [ ] Verify `invoke()` round-trip works with a simple `greet` command
- [ ] Add `tauri-plugin-store`, `tauri-plugin-fs`, `tauri-plugin-log`
- [ ] Commit and tag `v0.1.0-skeleton`

### Milestone 2 — LLM Integration
- [ ] Integrate `llama-cpp-2` (or chosen binding) — load a small GGUF model
- [ ] Implement basic `generate(prompt, max_tokens)` command
- [ ] Implement streaming via Tauri Channels (`Channel<LlmEvent>`)
- [ ] Build first-run model download/license wizard UI
- [ ] Add generation controls (temperature, top-p, context length)
- [ ] Commit and tag `v0.2.0-llm`

### Milestone 3 — Persistence Layer
- [ ] Set up `tauri-plugin-sql` with SQLite + migrations
- [ ] Implement `save_campaign` / `load_campaign` commands
- [ ] Build JSON/Markdown file import/export
- [ ] Commit and tag `v0.3.0-storage`

### Milestone 4 — Core Utilities & Design System (First Pass)
- [ ] NPC Generator command + UI
- [ ] World Builder command + UI
- [ ] Encounter Builder command + UI
- [ ] Session Logger command + UI
- [ ] Dice Roller command + UI
- [ ] Implement design system: `BentoCard`, glassmorphism, dark blue + gold tokens
- [ ] Build bento grid dashboard shell with left rail nav
- [ ] Commit and tag `v0.4.0-utilities`

### Milestone 5 — DM-Specific Tools
- [ ] Initiative / Combat Tracker
- [ ] Random Tables roller
- [ ] Map viewer with fog-of-war (`react-konva`)
- [ ] Calendar & Weather generator
- [ ] Relationship web (`react-flow`)
- [ ] Commit and tag `v0.5.0-dm-tools`

### Milestone 6 — Lore RAG & Polish
- [ ] Add lore chunking + embedding storage (`sqlite-vec`)
- [ ] Inject retrieved lore into LLM prompts
- [ ] Soundboard / ambience module
- [ ] Handout renderer (Markdown → PDF)
- [ ] Polish all glassmorphism effects, micro-interactions, and gold glow states
- [ ] Ensure WCAG AA contrast on all text over glass cards
- [ ] Responsive bento collapse (2-column on narrow windows)
- [ ] Accessibility pass (keyboard nav, screen reader labels, focus rings in `--gold-bright`)
- [ ] Commit and tag `v0.6.0-lore-polish`

### Milestone 7 — Testing, CI, Distribution
- [ ] Unit tests for dice math, encounter balance, storage migrations
- [ ] Cross-platform CI with `tauri-apps/tauri-action`
- [ ] Code signing for macOS and Windows
- [ ] Auto-updater with `tauri-plugin-updater` + delta updates for model packs
- [ ] Package with `npm run tauri build`
- [ ] Commit and tag `v1.0.0-release`

---

## 16. Final Checklist

A consolidated checklist covering all phases:

1. [ ] Scaffold with `npm create tauri-app@latest` (Tauri v2, react-ts)
2. [ ] Configure capabilities (`src-tauri/capabilities/default.json`)
3. [ ] Integrate local LLM binding (`llama-cpp-2`, `llama_cpp`, or Candle)
4. [ ] Stream tokens via Tauri Channels (not raw `invoke`)
5. [ ] Add persistence: `tauri-plugin-store` + `tauri-plugin-fs` + `tauri-plugin-sql`
6. [ ] Implement design system: glassmorphism, bento grid, dark blue + gold palette, Cinzel/Inter/JetBrains Mono fonts
7. [ ] Implement core utilities: World Builder, NPC Generator, Encounter Builder, Item Forge, Session Logger, Dice Roller
8. [ ] Implement DM-specific tools: Initiative Tracker, Random Tables, Fog-of-War, Calendar, Relationship Web, Soundboard
9. [ ] Add lore RAG / semantic search (`sqlite-vec`)
10. [ ] Build first-run model download / license wizard
11. [ ] Add tests, CI (`tauri-action`), code signing, updater, then package with `npm run tauri build`

---

**You're now ready to spin up your own AI-powered Dungeon Master toolkit!**

Happy crafting — may your dice always land favorably! 🎲