Nimbalyst includes a full-featured code editor powered by Monaco (the same editor used in VS Code). When you open a code file, it automatically opens in Monaco with syntax highlighting and standard editing features.

Code editing sits next to the rest of the workspace rather than in a separate app. See the developer tools page.

Code open in Nimbalyst's Monaco editor, with the file tree and agent panel beside it — Code uses the same workspace layout as documents and visual editors, so the project and agent conversation stay beside the file.

Reviewing AI Changes

When an agent edits a code file, Nimbalyst opens Monaco's inline diff view. The editor is read-only while the diff is awaiting review:

Green background: Added content
Red background: Removed content (with strikethrough)
Previous and Next jump between changed regions, and the counter shows your position.
Accept All keeps the agent's version.
Reject All restores the version from before the edit.
Go to Session opens the agent session that made the edit when that session is known.

The diff remains visible until you accept or reject it.

Supported File Types

The code editor supports a wide range of programming languages:

Web Development

JavaScript: .js, .jsx, .mjs, .cjs
TypeScript: .ts, .tsx, .d.ts
HTML: .html, .htm
CSS: .css, .scss, .sass, .less

Data Formats

JSON: .json, .jsonc
YAML: .yaml, .yml
XML: .xml
TOML: .toml

Programming Languages

Python: .py, .pyw, .pyi
Go: .go
Rust: .rs
C/C++: .c, .h, .cpp, .cc, .hpp
Java: .java
C#: .cs
Swift: .swift
Kotlin: .kt
Ruby: .rb
PHP: .php
Dart: .dart

Shell & Config

Shell scripts: .sh, .bash, .zsh, .fish
SQL: .sql
GraphQL: .graphql
Dockerfile

Other

Markdown: .md (raw view mode)
Plain text: .txt, .log

Editor Features

Syntax Highlighting

Each language gets appropriate color highlighting, making code easy to read and understand.

Line Numbers

Line numbers appear on the left for navigation and reference.

Minimap

A code overview appears on the right side, letting you see the structure of longer files and quickly jump to different sections.

Code Folding

Click the arrows next to code blocks to collapse or expand them. Works with:

Functions and methods
Classes
Conditional blocks
Loops
JSON objects and arrays

Bracket Matching

Matching brackets, braces, and parentheses are highlighted in color, making it easy to see paired delimiters.

Editing Code

Autosave

Changes save automatically after 2 seconds of inactivity. A dot in the tab title indicates unsaved changes.

Manual Save

Press Cmd+S (Mac) or Ctrl+S (Windows/Linux) to save immediately.

All common editing shortcuts work:

Cmd/Ctrl+C: Copy
Cmd/Ctrl+V: Paste
Cmd/Ctrl+Z: Undo
Cmd/Ctrl+Shift+Z: Redo
Cmd/Ctrl+F: Find
Cmd/Ctrl+H: Find and replace

Indentation

New files default to two-space indentation. Existing files keep their detected indentation style.

File Watching

The editor detects when files are changed by other programs:

If you have no unsaved changes, the file reloads automatically
If you have unsaved changes, Nimbalyst shows a conflict banner so you can load the disk version or keep working with your current version

File History

Code file edits are tracked in your file history:

Press Cmd+Y (Mac) or Ctrl+Y (Windows/Linux) to open file history
Restore any previous version of the file
See when changes were made

Tips

Hover for full path: Hover over a tab to see the complete file path
Multiple files: Open code and markdown files side by side in tabs
Theme support: The editor automatically matches your Nimbalyst theme (light/dark)
Focus indicator: When you click elsewhere and return, your cursor position is preserved