obsidian-reference-architecture

Implement Obsidian reference architecture with best-practice project layout. Use when designing new plugins, reviewing project structure, or establishing architecture standards for Obsidian development. Trigger with phrases like "obsidian architecture", "obsidian project structure", "obsidian best practices", "organize obsidian plugin".

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name	obsidian-reference-architecture
description	Implement Obsidian reference architecture with best-practice project layout. Use when designing new plugins, reviewing project structure, or establishing architecture standards for Obsidian development. Trigger with phrases like "obsidian architecture", "obsidian project structure", "obsidian best practices", "organize obsidian plugin".
allowed-tools	Read, Grep
version	1.13.0
license	MIT
author	Jeremy Longshore <jeremy@intentsolutions.io>
tags	["saas","obsidian","obsidian-reference"]
compatibility	Designed for Claude Code, also compatible with Codex and OpenClaw

Obsidian Reference Architecture

Overview

Architecture patterns for complex Obsidian plugins: modular project structure with separate files for views, commands, settings, and services; state management; a service layer for vault operations; command registry; view manager; and CSS scoping.

Prerequisites

TypeScript and Obsidian API familiarity
Working build pipeline (esbuild recommended)
Plugin scaffolding complete (manifest.json, package.json, tsconfig.json)

Instructions

Step 1: Project Structure

my-plugin/
├── src/
│   ├── main.ts              # Plugin entry — thin orchestrator
│   ├── types.ts              # Shared interfaces and type definitions
│   ├── constants.ts          # Plugin-wide constants
│   ├── commands/
│   │   ├── index.ts          # Command registry
│   │   ├── insert-template.ts
│   │   └── toggle-sidebar.ts
│   ├── views/
│   │   ├── index.ts          # View registry
│   │   ├── sidebar-view.ts
│   │   └── modal-view.ts
│   ├── settings/
│   │   ├── settings.ts       # Settings interface and defaults
│   │   └── settings-tab.ts   # Settings UI tab
│   └── services/
│       ├── vault-service.ts  # File read/write/search operations
│       ├── metadata-service.ts  # Frontmatter and cache operations
│       └── sync-service.ts   # External sync or background tasks
├── styles.css
├── manifest.json
├── versions.json
├── package.json
├── tsconfig.json
└── esbuild.config.mjs

Step 2: Thin Main Entry Point

// src/main.ts — orchestrates, does not implement
import { Plugin } from 'obsidian';
import { MyPluginSettings, DEFAULT_SETTINGS } from './settings/settings';
import { MySettingTab } from './settings/settings-tab';
import { registerCommands } from './commands';
import { registerViews } from './views';
import {  }  ;

      {
  : ;
  : ;

   () {
     .();
    . =  (.);

    ();
    ();
    .( (., ));
  }

  () {
    
    ..();
  }

   () {
    . = .({}, ,  .());
  }

   () {
     .(.);
  }
}

// src/commands/index.ts
import type MyPlugin from '../main';
import { insertTemplate } from './insert-template';
import { toggleSidebar } from './toggle-sidebar';

export function registerCommands(plugin: MyPlugin) {
  plugin.addCommand({
    id: 'insert-template',
    name: 'Insert Template',
    editorCallback: (editor, view) => insertTemplate(plugin, editor, view),
  });

  plugin.addCommand({
    id: 'toggle-sidebar',
    name: 'Toggle Sidebar',
    callback: () => toggleSidebar(plugin),
  });
}

// src/commands/insert-template.ts
import { Editor, MarkdownView } from 'obsidian';
import type MyPlugin from '../main';

export function insertTemplate(plugin: MyPlugin, editor: Editor, view: MarkdownView) {
  const template = plugin.settings.defaultTemplate;
  editor.replaceSelection(template);
}

// src/views/index.ts
import type MyPlugin from '../main';
import { SidebarView, VIEW_TYPE_SIDEBAR } from './sidebar-view';

export function registerViews(plugin: MyPlugin) {
  plugin.registerView(VIEW_TYPE_SIDEBAR, (leaf) => new SidebarView(leaf, plugin));

  // Add ribbon icon to activate view
  plugin.addRibbonIcon('layout-sidebar-right', 'Open Sidebar', () => {
    activateView(plugin);
  });
}

async function activateView(plugin: MyPlugin) {
  const { workspace } = plugin.app;

  let leaf = workspace.getLeavesOfType(VIEW_TYPE_SIDEBAR)[0];
  if (!leaf) {
    const rightLeaf = workspace.getRightLeaf(false);
    if (rightLeaf) {
      await rightLeaf.setViewState({ type: VIEW_TYPE_SIDEBAR, active: true });
      leaf = rightLeaf;
    }
  }
  if (leaf) {
    workspace.revealLeaf(leaf);
  }
}

// src/views/sidebar-view.ts
import { ItemView, WorkspaceLeaf } from 'obsidian';
import type MyPlugin from '../main';

export const VIEW_TYPE_SIDEBAR = 'my-plugin-sidebar';

export class SidebarView extends ItemView {
  plugin: MyPlugin;

  constructor(leaf: WorkspaceLeaf, plugin: MyPlugin) {
    super(leaf);
    this.plugin = plugin;
  }

  getViewType(): string {
    return VIEW_TYPE_SIDEBAR;
  }

  getDisplayText(): string {
    return 'My Plugin';
  }

  getIcon(): string {
    return 'layout-sidebar-right';
  }

  async onOpen() {
    const container = this.containerEl.children[1];
    container.empty();
    container.addClass('my-plugin-sidebar');

    container.createEl('h3', { text: 'My Plugin' });
    const list = container.createEl('ul');

    // Populate from service layer
    const files = await this.plugin.vaultService.getRecentFiles(10);
    for (const file of files) {
      list.createEl('li', { text: file.basename });
    }
  }

  async onClose() {
    // Clean up DOM references
    this.containerEl.empty();
  }
}

// src/services/vault-service.ts
import { App, TFile, TFolder, CachedMetadata } from 'obsidian';

export class VaultService {
  constructor(private app: App) {}

  // File operations
  async readFile(path: string): Promise<string> {
    const file = this.app.vault.getAbstractFileByPath(path);
    if (!(file instanceof TFile)) throw new Error(`Not a file: ${path}`);
    return this.app.vault.read(file);
  }

  async writeFile(path: string, content: string): Promise<void> {
    const file = this.app.vault.getAbstractFileByPath(path);
    if (file instanceof TFile) {
      await this.app.vault.modify(file, content);
    } else {
      await this.app.vault.create(path, content);
    }
  }

  // Search operations
  getFilesInFolder(folderPath: string): TFile[] {
    const folder = this.app.vault.getAbstractFileByPath(folderPath);
    if (!(folder instanceof TFolder)) return [];
    return folder.children.filter((f): f is TFile => f instanceof TFile);
  }

  getRecentFiles(limit: number): TFile[] {
    return this.app.vault.getMarkdownFiles()
      .sort((a, b) => b.stat.mtime - a.stat.mtime)
      .slice(0, limit);
  }

  // Metadata operations
  getMetadata(file: TFile): CachedMetadata | null {
    return this.app.metadataCache.getFileCache(file);
  }

  getFrontmatter(file: TFile): Record<string, unknown> | undefined {
    return this.getMetadata(file)?.frontmatter;
  }

  // Cleanup
  destroy() {
    // Release any held references
  }
}

// src/settings/settings.ts
export interface MyPluginSettings {
  version: number;
  defaultTemplate: string;
  showStatusBar: boolean;
  syncInterval: number;
}

export const DEFAULT_SETTINGS: MyPluginSettings = {
  version: 1,
  defaultTemplate: '## New Section\n\n',
  showStatusBar: true,
  syncInterval: 300,
};

// src/settings/settings-tab.ts
import { App, PluginSettingTab, Setting } from 'obsidian';
import type MyPlugin from '../main';

export class MySettingTab extends PluginSettingTab {
  plugin: MyPlugin;

  constructor(app: App, plugin: MyPlugin) {
    super(app, plugin);
    this.plugin = plugin;
  }

  display(): void {
    const { containerEl } = this;
    containerEl.empty();

    new Setting(containerEl)
      .setName('Default template')
      .setDesc('Content inserted by the Insert Template command')
      .addTextArea(text => text
        .setValue(this.plugin.settings.defaultTemplate)
        .onChange(async (value) => {
          this.plugin.settings.defaultTemplate = value;
          await this.plugin.saveSettings();
        }));

    new Setting(containerEl)
      .setName('Show status bar')
      .setDesc('Display plugin status in the bottom bar')
      .addToggle(toggle => toggle
        .setValue(this.plugin.settings.showStatusBar)
        .onChange(async (value) => {
          this.plugin.settings.showStatusBar = value;
          await this.plugin.saveSettings();
        }));

    new Setting(containerEl)
      .setName('Sync interval')
      .setDesc('Seconds between background syncs (0 to disable)')
      .addSlider(slider => slider
        .setLimits(0, 3600, 60)
        .setValue(this.plugin.settings.syncInterval)
        .setDynamicTooltip()
        .onChange(async (value) => {
          this.plugin.settings.syncInterval = value;
          await this.plugin.saveSettings();
        }));
  }
}

/* styles.css — all classes prefixed with plugin id */

/* Layout */
.my-plugin-sidebar {
  padding: 8px 12px;
}

.my-plugin-sidebar h3 {
  margin: 0 0 12px;
  font-size: var(--font-ui-medium);
  color: var(--text-normal);
}

.my-plugin-sidebar ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.my-plugin-sidebar li {
  padding: 4px 8px;
  border-radius: var(--radius-s);
  cursor: pointer;
  color: var(--text-muted);
}

.my-plugin-sidebar li:hover {
  background: var(--background-modifier-hover);
  color: var(--text-normal);
}

/* Modal styles */
.my-plugin-modal .modal-content {
  padding: 16px;
}

/* Use Obsidian CSS variables — never hardcode colors */
.my-plugin-highlight {
  background: var(--background-modifier-success);
  color: var(--text-on-accent);
  border-radius: var(--radius-s);
  padding: 2px 6px;
}

/* Responsive: Obsidian handles mobile layout, but adjust spacing */
.is-mobile .my-plugin-sidebar {
  padding: 4px 8px;
}

.is-mobile .my-plugin-sidebar li {
  padding: 8px;  /* Larger touch targets */
}

// src/services/state-service.ts
import { Events } from 'obsidian';

interface PluginState {
  isProcessing: boolean;
  lastSync: number | null;
  activeItems: string[];
}

export class StateService extends Events {
  private state: PluginState = {
    isProcessing: false,
    lastSync: null,
    activeItems: [],
  };

  get(): Readonly<PluginState> {
    return this.state;
  }

  update(partial: Partial<PluginState>) {
    Object.assign(this.state, partial);
    this.trigger('state-changed', this.state);
  }

  // Views subscribe to state changes
  // In a view: plugin.stateService.on('state-changed', (state) => this.refresh(state));
}

Issue	Cause	Solution
Circular dependencies	Services importing main, main importing services	Use `type` imports or interface segregation
Missing types at runtime	Interface-only imports	Create `types.ts` for shared interfaces
Event listener leaks	Direct `addEventListener` calls	Use `this.registerEvent()` for automatic cleanup
Settings lost on upgrade	No migration path	Version your settings interface (see `obsidian-prod-checklist`)
CSS conflicts with other plugins	Generic class names	Prefix all classes with your plugin id
View not restoring on restart	Missing `registerView`	Register in `onload`, Obsidian restores state from layout
Service holds stale references	No cleanup on unload	Call `destroy()` on services in `onunload()`

// 1. Create src/commands/export-notes.ts
import type MyPlugin from '../main';

export async function exportNotes(plugin: MyPlugin) {
  const files = plugin.vaultService.getRecentFiles(50);
  // ... export logic
}

// 2. Register in src/commands/index.ts
import { exportNotes } from './export-notes';

// Add to registerCommands():
plugin.addCommand({
  id: 'export-notes',
  name: 'Export Recent Notes',
  callback: () => exportNotes(plugin),
});

// src/services/search-service.ts
import { App, TFile, PreparedQuery, prepareQuery, fuzzySearch } from 'obsidian';

export class SearchService {
  constructor(private app: App) {}

  fuzzyFind(query: string): TFile[] {
    const prepared: PreparedQuery = prepareQuery(query);
    return this.app.vault.getMarkdownFiles()
      .filter(f => fuzzySearch(prepared, f.basename)?.score !== undefined)
      .sort((a, b) => {
        const sa = fuzzySearch(prepared, a.basename)?.score ?? -Infinity;
        const sb = fuzzySearch(prepared, b.basename)?.score ?? -Infinity;
        return sb - sa;
      });
  }
}