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docs: add v5.0 platform design spec
Plugin-first architecture with four subsystems: - Plugin system (registry, context API, event bus) - Writing Studio (manuscript manager, sprints, snapshots, proofreading) - AI Assistant (multi-provider: Ollama, LMStudio, GGUF+GPU, cloud APIs) - Collaboration (git-based async, comments, review requests) Amit Haridas
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# MarkdownConverter v5.0 — Platform Design
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**Date:** 2026-04-14
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**Status:** Approved
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**Author:** Amit Haridas
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## Overview
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Transform MarkdownConverter from a monolithic editor into an extensible platform with a plugin system and three feature packs, shipped together as v5.0.
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## Subsystems
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1. **Plugin System** — Lightweight plugin registry with extension points (sidebar, commands, settings, status bar, export hooks, event bus)
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2. **Writing Studio Plugin** — Manuscript manager, goal tracking, writing sprints, snapshots, smart proofreading
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3. **AI Assistant Plugin** — Multi-provider AI writing assistant (Ollama, LMStudio, GGUF direct with GPU, Anthropic, OpenAI)
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4. **Collaboration Plugin** — Git-based async collaboration, comments/annotations, review requests
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## Core Principle
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**Existing functionality is never replaced or broken.** The plugin system is additive. All existing keyboard shortcuts, features, and UI remain untouched. Plugin shortcuts use `Ctrl+Alt+` namespace.
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---
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## 1. Plugin System
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### File Structure
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```
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src/
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plugins/
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plugin-registry.js # Load, register, lifecycle
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plugin-api.js # Base class plugins extend
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plugin-loader.js # Discovers and validates manifests
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built-in/
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writing-studio/
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manifest.json
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index.js
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panels/
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components/
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ai-assistant/
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manifest.json
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index.js
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providers/
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collaboration/
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manifest.json
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index.js
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```
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### Manifest Schema
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```json
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{
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"id": "writing-studio",
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"name": "Writing Studio",
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"version": "1.0.0",
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"description": "Manuscript management, goal tracking, writing sprints",
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"icon": "pen-tool",
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"extensionPoints": {
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"sidebar": { "panel": "panels/manuscript-panel.js", "order": 30 },
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"settings": { "section": "settings/index.js" },
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"statusBar": { "indicators": ["sprint-timer", "word-goal"] },
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"commands": [
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{ "id": "start-sprint", "label": "Start Writing Sprint", "shortcut": "Ctrl+Alt+S" },
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{ "id": "take-snapshot", "label": "Take Snapshot", "shortcut": "Ctrl+Alt+N" }
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],
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"exportHooks": {
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"preExport": "hooks/pre-export.js",
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"postExport": "hooks/post-export.js"
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}
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},
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"settings": [
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{ "key": "dailyGoal", "type": "number", "default": 1000, "label": "Daily word goal" },
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{ "key": "sprintDuration", "type": "number", "default": 25, "label": "Sprint duration (min)" }
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]
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}
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```
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### Plugin Lifecycle
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1. PluginLoader discovers manifests in `built-in/` + user plugins directory
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2. PluginRegistry validates manifests
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3. Each plugin calls `Plugin.init(context)` receiving scoped API context
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4. Extension points registered (sidebar panels, commands, status bar items)
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5. Plugins activate lazily — sidebar panel loads JS when user clicks tab
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### Plugin Context API
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Each plugin's `init()` receives:
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```javascript
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{
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sidebar: {
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registerPanel(id, { icon, title, component })
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},
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commands: {
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register(id, label, handler, shortcut?)
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},
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statusBar: {
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registerIndicator(id, { position, render })
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},
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settings: {
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get(key), // plugin-scoped
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set(key, value), // auto-persisted via electron-store
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onChanged(key, callback)
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},
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editor: {
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getContent(), // current document
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getSelection(), // selected text
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insertAtCursor(text), // requires opt-in
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onContentChanged(callback)
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},
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events: {
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on(event, handler),
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emit(event, data)
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},
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exports: {
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registerPreHook(handler),
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registerPostHook(handler)
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},
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ipc: {
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invoke(channel, ...args),
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on(channel, handler)
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}
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}
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```
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### Event Bus Events
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```
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document:opened, document:saved, document:changed,
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editor:selection-changed, tab:switched, tab:closed,
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export:started, export:completed, export:failed,
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plugin:loaded, plugin:activated, plugin:deactivated,
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app:ready, app:before-quit
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```
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### Design Rules
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- Built-in plugins use the same API as future third-party plugins
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- Lazy activation — sidebar panels don't load until clicked
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- Scoped settings: `plugins.<id>.<key>` in electron-store
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- Plugin errors caught and shown as notifications, never crash the app
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- Plugin commands namespaced `<plugin-id>:<command-id>`
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---
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## 2. Writing Studio Plugin
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### 2A. Manuscript / Project Manager
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Folder-based project structure:
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```
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~/Manuscripts/
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my-novel/
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.project.json # { title, targets, metadata }
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01-chapter-one.md
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02-chapter-two.md
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characters/
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protagonist.md
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research/
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world-building.md
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.snapshots/
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2026-04-14T10-30.json
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```
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`.project.json`:
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```json
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{
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"title": "My Novel",
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"type": "manuscript",
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"target": { "words": 80000, "deadline": "2026-09-01" },
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"chapters": [
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{ "file": "01-chapter-one.md", "title": "The Beginning", "status": "draft" }
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],
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"metadata": { "author": "", "genre": "", "synopsis": "" }
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}
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```
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Sidebar panel shows project tree with drag-to-reorder, word counts per chapter, target progress bar. "Compile manuscript" exports all chapters as a single document.
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### 2B. Goal Tracking & Writing Sprints
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- **Status bar**: daily progress bar + sprint timer
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- **Writing sprint**: configurable duration (15/25/30/45/60 min), word count delta, WPM at end
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- **Goal tracking**: daily/weekly word goals, streak tracking, 30-day bar chart
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- **Enhanced analytics**: session tracking, readability scores, productive time-of-day heatmap
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- Data stored in `plugins.writing-studio.history` as date-keyed map
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### 2C. Snapshot & Versioning
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- `Ctrl+Alt+N` or toolbar button saves snapshot
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- Stored as JSON: `{ timestamp, content, wordCount, cursorPos, label }`
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- Snapshot panel in sidebar: Restore, Diff (side-by-side), auto-snapshot interval
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- Snapshots in `.snapshots/` inside project folder, or app data if no project
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### 2D. Smart Proofreading
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Delegates to AI plugin via event bus. Writing Studio provides:
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- Right-click context menu: "Check grammar", "Suggest alternatives", "Analyze readability"
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- Inline wavy underline decorations for issues
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- Proofread panel: issues categorized by type with Accept/Dismiss
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### Commands
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| Command | Shortcut | Action |
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|---------|----------|--------|
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| `start-sprint` | `Ctrl+Alt+S` | Start writing sprint |
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| `stop-sprint` | `Ctrl+Alt+Shift+S` | Stop sprint |
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| `take-snapshot` | `Ctrl+Alt+N` | Save snapshot |
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| `restore-last-snapshot` | `Ctrl+Alt+Z` | Restore latest snapshot |
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| `new-project` | — | Create manuscript project |
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| `compile-manuscript` | `Ctrl+Alt+E` | Export all chapters |
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| `proofread-document` | `Ctrl+Alt+G` | AI proofread |
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---
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## 3. AI Assistant Plugin
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### Provider Architecture
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```
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AI Plugin
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├── Provider Interface
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│ ├── complete(prompt, options) → string
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│ ├── stream(prompt, options) → AsyncIterable
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│ └── analyze(text, type) → AnalysisResult
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│
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├── Providers
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│ ├── OllamaProvider — localhost:11434
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│ ├── LMStudioProvider — localhost:1234/v1
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│ ├── GGUFProvider — direct llama.cpp with GPU support
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│ ├── AnthropicProvider — Claude API
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│ └── OpenAIProvider — GPT API
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│
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└── Features
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├── Grammar/style check
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├── Inline auto-complete
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├── AI chat panel (sidebar)
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├── Document analysis
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└── Smart commands (command palette)
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```
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### Provider Details
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**Ollama:** `GET /api/tags` for models, `POST /api/generate` and `POST /api/chat` for inference.
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**LMStudio:** OpenAI-compatible API at `localhost:1234/v1`. `GET /v1/models`, standard chat completion format, SSE streaming.
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**GGUF Direct (with GPU):**
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- Ships bundled llama.cpp binaries per platform (CUDA, Vulkan, Metal, CPU variants)
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- Auto-detects GPU: CUDA (nvidia-smi), Vulkan driver, Metal (macOS)
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- GPU layer offloading: configurable, auto-suggests based on VRAM vs model size
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- Settings: GPU backend selection, layer count, context length, thread count
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- "Keep model loaded" option for faster repeated requests
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- WASM fallback for sandboxed environments (CPU-only)
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- External binary path for advanced users with custom builds
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- Process management: spawn llama.cpp in server mode, clean up on app quit
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**Cloud (Anthropic/OpenAI):**
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- API key stored encrypted via electron safeStorage
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- Token usage tracking with estimated cost
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- Rate limit awareness with request queueing and backoff
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### IPC Design
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All provider HTTP requests go through main process:
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- No CORS issues
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- API keys never in renderer
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- Main process enforces rate limiting
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- GGUF inference in main process
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```
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Renderer → ipc.invoke('ai:complete') → Main → HTTP to provider → result → Renderer
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Renderer → ipc.invoke('ai:stream') → Main → HTTP stream → ipc.on('ai:chunk') → Renderer
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```
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### Features
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1. **Inline suggestions**: ghost text after configurable delay, Tab to accept, Esc to dismiss
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2. **AI chat panel**: sidebar conversation, "Insert" / "Replace selection" buttons
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3. **Document analysis**: grammar, style, tone, with accept/reject per suggestion
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4. **Smart commands**: summarize, generate outline, find inconsistencies, translate, explain code
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### Privacy
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- Local-first: default provider is Ollama
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- No telemetry: requests go direct to provider
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- Content gating: exclude file types from AI
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- Status bar shows "AI: processing..." with cancel option
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- Cloud usage stats in settings (tokens, cost)
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### Cross-Plugin Integration
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```javascript
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// Writing Studio calls AI Plugin
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context.events.emit('ai:analyze', { text, type: 'grammar', callback });
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```
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---
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## 4. Collaboration Plugin
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### 4A. Enhanced Git Panel
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Upgrades to existing git panel:
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- Remote management (add/remove remotes, push/pull)
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- Branch list and switching
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- Commit history with diff viewer (side-by-side or unified)
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- Conflict resolution UI (accept-ours/accept-theirs/per-edit)
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### 4B. Shared Repository Workflow
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1. Writer A creates project + initializes git + pushes to shared repo
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2. Writer B clones repo from within MarkdownConverter
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3. Both write on their own branches
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4. Writer A creates review request (simplified PR)
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Review request: changed files, word count diff, commit messages. Reviewer can approve, request changes, leave inline comments. Reviews are git branches + comments as git notes.
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### 4C. Comments & Annotations
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Inline comments stored as JSON in `.comments/` directory (git-tracked):
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```json
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{
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"id": "uuid",
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"file": "03-chapter-three.md",
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"range": { "start": 142, "end": 189 },
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"text": "This dialogue feels unnatural",
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"author": "amit",
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"timestamp": "2026-04-14T14:30:00Z",
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"replies": [],
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"resolved": false
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}
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```
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- Highlighted text in editor with tooltip on hover
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- Comment panel in sidebar: all unresolved comments across files
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- Resolution workflow: add → address → reply → resolve
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- Resolved comments dim but stay visible
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### 4D. Change Notifications
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- Status bar indicator: `↓ 3 new commits`
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- Click to see changes, one-click pull
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- Conflicts trigger resolution UI
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- Push button only when local commits ahead of remote
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### 4E. Offline-First
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All writing happens locally. Git is the sync mechanism. No internet required for writing, commenting, snapshots, or sprints. Push/pull on user action or auto-sync setting.
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### Commands
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| Command | Shortcut | Action |
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|---------|----------|--------|
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| `collab:commit` | `Ctrl+Shift+G` | Commit with message |
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| `collab:push` | — | Push current branch |
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| `collab:pull` | — | Pull from remote |
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| `collab:add-comment` | `Ctrl+Alt+C` | Comment on selection |
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| `collab:next-comment` | `F8` | Next unresolved comment |
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| `collab:prev-comment` | `Shift+F8` | Previous comment |
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| `collab:create-review` | — | Create review request |
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### Cross-Plugin Integration
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```javascript
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context.events.emit('snapshot:created', { file, snapshotId });
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context.events.on('project:chapter-opened', (chapter) => { /* load comments */ });
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context.events.on('comment:added', (comment) => { /* AI could suggest fix */ });
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```
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---
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## Bundle Size Impact
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- llama.cpp binaries: ~15MB per GPU variant, only target platform shipped
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- Plugin system core: ~30KB
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- Each built-in plugin: ~50-100KB
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- Total estimated increase: ~50-70MB (primarily from llama.cpp binaries)
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## Testing Strategy
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- Plugin system: unit tests for registry, loader, context API mocking
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- Each plugin: isolated unit tests, integration tests via plugin context
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- AI provider tests: mock HTTP responses, test streaming parsing
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- Git tests: use test repository fixture
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- E2E: verify plugin loading doesn't break existing features
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