The editor that powers VS Code, tuned for big codebases.
Code Editor
Build apps with plain English.
Describe what you want. Mulu Code writes, tests, and deploys it. Full Monaco editor, AI-native autocomplete, and multi-file editing.
Screenshot placeholder: Mulu Code workspace with file explorer on the left, Monaco editor in the center showing TypeScript code, and AI chat panel on the right.
Why builders switch
One window. Whole workflow.
Editor, AI chat, and multi-file diffs sit in the same surface.
Suggestions read your file, your imports, and your style.
Whole changes review, accept, and roll back as one diff.
What you get
Editor, completion, and review.
Every feature a serious builder expects, wired into the AI workflow.
01
The Monaco editor that powers VS Code.
Bracket matching, code folding, minimap, split panes, find-and-replace across files, and configurable keybindings including Vim and Emacs modes.
Open a 10,000-line file and scrolling stays smooth. Search across a 100,000-file monorepo and results land instantly.
Cmd-P jumps to a file. Cmd-Shift-P opens the command palette. Multi-cursor, sticky headers, rectangular selection. Every muscle-memory shortcut works.
Screenshot placeholder: Monaco split view with TypeScript file, minimap, and command palette open listing Go to File and Refactor actions.
02
Syntax and language tools for every stack.
Out of the box: TypeScript, JavaScript, Python, Go, Rust, Java, C++, C#, Ruby, PHP, Swift, Kotlin, Elixir, plus the long tail of config and markup formats.
Local language servers surface type errors, unused imports, and lint warnings as you type. Go-to-definition and rename-symbol work across files.
Tree-sitter powers semantic parsing under the hood, so the AI sees functions, classes, and dependencies, not a flat wall of text.
Screenshot placeholder: Rust file with syntax highlighting, inline type diagnostics, and a Go to Definition hover card over a struct field.
03
Autocomplete that understands the file.
The suggestion engine reads the surrounding file and related modules, then completes with the full block that fits: a function body, a type, a JSX subtree, a SQL query.
Fast models power inline suggestions for low latency. Trigger a heavier completion with a shortcut to route the request to a reasoning model for higher-quality output.
Every suggestion is grounded in your codebase. The right imports, the existing utilities, your naming. Tab to accept, Alt-] to cycle.
Screenshot placeholder: editor with an inline AI completion extending three lines beyond the cursor and a Tab hint to accept.
04
Multi-file edits, reviewed as one change.
Ask for a new route. The router updates, the handler appears, the test gets written, and the types adjust, all in a single reviewable diff.
Accept or reject per-file or per-hunk. Tweak generated wording inline before applying. Nothing is all-or-nothing.
Edits are atomic and reversible. Rollback undoes every touched file in one step. Each change carries a short reason, so you never have to guess.
Screenshot placeholder: multi-file diff review showing five files touched by a single change, with per-hunk accept and reject toggles.
Ready to build?
Download Mulu Code and start building in plain English, or jump straight into the editor.
Try Mulu