Editor

Nexis includes a full code editor built on CodeMirror 6, sharing the window with your terminal so you can edit and run without switching apps.

Languages and syntax

Syntax highlighting covers TS/JS, Rust, Python, HTML/CSS, JSON/JSONC, Markdown, Go, C/C++, Java, C#, PHP, Ruby, SQL dialects, YAML, TOML, Shell/Bash, and Dockerfile.

AI in the editor

• Inline autocomplete — context-aware completions with a configurable provider and model.
• Diff approval — AI-proposed edits are shown as per-hunk diffs; approve or reject each change individually. Nothing is written until you say so.

Refactoring and navigation

• Semantic symbol rename (F2) — LSP-powered rename across the project when a language server is running, so only true references change. When no server is available, it falls back to a word-boundary find/replace with a preview dialog.
• LSP refactorings (Ctrl+Shift+R) — extract function and inline variable via language-server code actions. Every affected open tab reloads instantly.
• Breadcrumbs — file path plus symbol crumbs at the top of the editor.
• Symbol outline — a file-level function/class/variable tree in the sidebar.
• Quick file open (Ctrl+P) — a fuzzy workspace picker that respects .gitignore.
• Find and replace across the project — workspace-wide regex search with per-file preview and confirmation.

Editing niceties

• Code minimap with line-type coloring, click-to-scroll, and a viewport indicator.
• Vim mode.
• Inline linting — real-time syntax error markers (Lezer-based) for JS/TS, Python, Rust, Go, JSON, HTML, CSS, and Markdown.
• Formatting — Prettier, rustfmt, clang-format, black, gofmt, and more; configurable per language, on save or with Shift+Alt+F.
• Code folding — by indent, region comments, and language constructs.
• Word wrap — per-file and global toggles.
• Snippet library — tab-stop snippets scoped by language.
• Run current file — execute via a configured command, with output captured in a terminal tab.

Viewers

• Markdown preview — right-click a .md file → Open Preview.
• Jupyter notebook viewer — right-click any .ipynb to open a static cell viewer that renders code, markdown, stream, and error outputs without a kernel.

Live sync

The editor and explorer update in real time as files change on disk, so external tools and the AI stay reflected instantly.