Command Decoration No Longer Works for editor:save-file in 1.9.10

Developers: Plugin & API
1

The ability to decorate/override the editor:save-file command by modifying this.app.commands.commands[commandId].callback has stopped working since Obsidian Desktop version 1.9.10.

This breaks existing plugins that rely on intercepting save operations (such as formaters).

Reproduction code

import { Plugin } from "obsidian";

export default class ExamplePlugin extends Plugin {
  onload() {
    const appCommands = this.app.commands?.commands;
    const commandsToOverride = ["editor:save-file"];

    if (!appCommands) {
      console.log("No commands found in the app.");
      return;
    }

    commandsToOverride.forEach((commandId) => {
      const command = appCommands[commandId];
      if (!command) {
        console.log(`Command not found: ${commandId}`);
        return;
      }

      console.log(`Overriding command: ${commandId}`);
      
      // This assignment no longer has any effect in 1.9.10
      command.callback = () => {
        console.log(`Command executed: ${commandId}`);
        // Custom logic here
      };
    });
  }
}

Expected

  • The command.callback assignment should override the original callback
  • When editor:save-file is executed (via Ctrl+S, auto-save, etc.), the custom callback should be invoked
  • This pattern worked in versions prior to 1.9.10

Actual

  • The command.callback assignment appears to succeed (no errors)
  • However, the custom callback is never invoked
  • The original save behavior continues to execute, ignoring the override
  • Console logs from the custom callback do not appear