---
title: Migrating to 1.0
description: What's new in OpenCode 1.0.
---

OpenCode 1.0 is a complete rewrite of the TUI.

We moved from the go+bubbletea based TUI which had performance and capability issues to an in-house framework (OpenTUI) written in zig+solidjs.

The new TUI works like the old one since it connects to the same opencode server.

---

## Upgrading

You should not be autoupgraded to 1.0 if you are currently using a previous
version. However some older versions of OpenCode always grab latest.


To upgrade manually, run
```bash
$ opencode upgrade 1.0.0
```

To downgrade back to 0.x, run
```bash
$ opencode upgrade 0.15.31
```

---

## UX changes

The session history is more compressed, only showing full details of the edit and bash tool.

We added a command bar which almost everything flows through. Press ctrl+p to bring it up in any context and see everything you can do.

Added a session sidebar (can be toggled) with useful information.

We removed some functionality that we weren't sure anyone actually used. If something important is missing please open an issue and we'll add it back quickly.

---

## Breaking changes

### Theme

The `system` theme has not yet been ported and custom themes aren't loaded yet but both of these will be fixed this week.

### Keybinds renamed

- messages_revert -> messages_undo
- switch_agent -> agent_cycle
- switch_agent_reverse -> agent_cycle_reverse
- switch_mode -> agent_cycle
- switch_mode_reverse -> agent_cycle_reverse

### Keybinds removed

- messages_layout_toggle
- messages_next
- messages_previous
- file_diff_toggle
- file_search
- file_close
- file_list
- app_help
- project_init
- tool_details
- thinking_blocks
