Amp June 19, 2026 Changelog

This update is a big deal for developers who want to customize how Amp helps them write and review code. It lets you build specialized AI helpers—like an agent strictly for checking code mistakes—and lets them work together in the background to get things done faster.

What's new

• Custom Agents: You can now write a simple plugin file to create your own AI agent. You get to pick its name, what AI model it uses, its instructions, and what tools it can access.
• Agent Modes: You can set up your custom agent to be your main assistant. When you do this, it shows up as a selectable mode in the app, just like picking a character in a video game.
• Background Worker Threads: You can have your main agent spin off a background helper (a "subagent") to do a specific task. For example, you can tell it to review your code in the background, and it will message you back when it's done.
• Thread Messaging: You can now send messages to these background agents and wait for their responses. The system can accept your message instantly, or you can have your code pause and wait for the agent to finish its thinking before moving on.

Improvements

• Better Multitasking: You can now spawn up to 25 custom worker agents at the same time. This means you can have a whole team of AI helpers working on different parts of your project at once, and you can easily switch between their chat windows to check their progress.

Fixes

No breaking changes in this release.