obsidian-safe-filenames/main.ts

import { Plugin } from 'obsidian';

const UNSAFE_CHAR_REGEX = /[*?<>"]/g;

export default class SafeFilenames extends Plugin {
    async onload() {
        this.registerEvent(this.app.vault.on('rename', (file, oldPath) => {
            if (UNSAFE_CHAR_REGEX.test(file.path)) {
                this.app.fileManager.renameFile(file, file.path.replaceAll(UNSAFE_CHAR_REGEX, ''));
            }
        }));
    }
}