Build the tool
you wish you had.

Capture the active vault before an asynchronous operation and check it again before writing. This prevents a delayed task from changing a different vault.

const originalVault = app.getActiveVault();
if (!originalVault) return ui.showNotice('Open a vault first.');

const notes = vault.listNotes();
const markdown = await vault.readNote(notes[0].id);

if (app.getActiveVault()?.id !== originalVault.id) return;
const created = await vault.createNote('My summary', markdown);
await workspace.openNote(created.id);

When a plugin updates a note that it owns, place a unique marker in the note and verify that marker before overwriting it. Do not identify plugin-owned notes by title alone.

Use the active editor for cursor-based tools. Use the frontmatter helper when you only need to change metadata.

const editor = this.app.workspace.activeEditor?.editor;
if (!editor) return new Notice('Open an editable note first.');
editor.replaceSelection(new Date().toISOString());

const file = this.app.workspace.getActiveFile();
if (!file) return;
await this.app.fileManager.processFrontMatter(file, data => {
  data.reviewed = true;
  data.reviewedAt = new Date().toISOString();
});

Clipboard access is permission-checked. Validate copied URLs before saving them and reject credentials, unsupported protocols, control characters, and unreasonably long input.

const value = await this.app.clipboard.readText();
const url = new URL(value.trim());
if (url.protocol !== 'https:' || url.username || url.password) {
  return new Notice('Copy a credential-free HTTPS link.');
}

Add requestUrl to the names imported by the starter. Knight Note blocks direct browser networking; plugin requests go through this permission-checked helper.

const response = await requestUrl({
  url: 'https://example.com/health',
  method: 'HEAD',
  throw: false,
});

new Notice(response.status < 400 ? 'Link is reachable.' : 'Link needs review.');

loadData() and saveData() store JSON for the current plugin and vault. Register cleanup for timers and other long-lived work.

async onload() {
  const saved = await this.loadData() || { deadline: 0 };
  const status = this.addStatusBarItem();
  status.setText(saved.deadline ? 'Timer running' : 'Timer ready');

  const timer = globalThis.setInterval(() => {
    status.setText(new Date().toLocaleTimeString());
  }, 1000);

  this.register(() => globalThis.clearInterval(timer));
}

Keep a small English fallback and update command or view labels when Knight Note switches between English and German.

const labels = {
  en: { command: 'Open daily note' },
  de: { command: 'Tagesnotiz öffnen' },
};

const language = app.getUiLanguage() === 'de' ? 'de' : 'en';
const removeLanguageListener = app.onUiLanguageChange(() => {
  this.registerCommandsForCurrentLanguage();
});
this.register(removeLanguageListener);

Add ItemView to the names imported by the starter. Register the view once, then open it from a command or ribbon button. Use registered events so Knight Note removes every listener when the plugin unloads.

class GraphView extends ItemView {
  getViewType() { return 'my-graph-view'; }
  getDisplayText() { return 'My graph'; }
  async onOpen() { this.contentEl.setText('Build the graph here'); }
}

this.registerView('my-graph-view', leaf => new GraphView(leaf));
this.addRibbonIcon('network', 'Open my graph', () => this.openGraph());
this.registerEvent(this.app.vault.on('modify', () => this.refreshGraph()));
this.registerEvent(this.app.workspace.on('file-open', () => this.refreshGraph()));

For note connections, use this.app.metadataCache.getResolvedLinks(). For complete note metadata, use this.app.vault.getMarkdownFiles(). Treat returned data as a snapshot and rebuild after relevant vault events.