LzSkylineтаlzskyline
27401ad438
On a dark theme Mermaid diagrams painted near-black: node fills and borders came from the editor surface and chrome border, class-diagram labels used nodeBorder, and with darkMode Mermaid darkened every derived series colour by 75%, turning pies black. Fills now use a lifted surface, strokes and labels use the foreground, series colours are passed in explicitly, Gantt task labels stay readable against their bars, and diagrams use the classic look (the neo look hard-codes a black start state). Applies to the Markdown preview and agent chat, which share the theme helper; covered for flowchart, sequence, class, state, pie and Gantt in light and dark. Co-authored-by: lzskyline <[email protected]>
The IDE you know, rebuilt in Rust.
Download · Benchmark · Plugins · Community
https://github.com/user-attachments/assets/234dd54c-1255-4b3a-b35c-533d78d737c0
OpenIDEA brings the IntelliJ IDEA way of working — its keymap, its tool windows, its search-everything habits — to a native app with a Rust core.
Editor, code insight, debugger, Git, terminal, database and HTTP clients,
for 60+ languages. Builds for macOS, Windows and Linux. On Windows, if you'd
rather skip the installer, each release also ships a portable zip — unpack it
and run openidea.exe.
Benchmark
Opening freqtrade (Python, ~770 files) with warm caches, median of 5 runs:
| OpenIDEA | IntelliJ IDEA 2026.2.3 | |
|---|---|---|
| Window with the project | 0.9 s | 3.1 s |
| Ready (CPU settled) | 1.1 s | 13.2 s |
| Memory (USS, all processes) | 169 MB | 2011 MB |
| CPU time until ready | 2.4 s | 47.9 s |
| Idle CPU | 4 % of a core | 7 % of a core |
| Quit | 0.3 s | 5.9 s |
A release build of OpenIDEA from main and IDEA with default settings and plugins, on
Windows 11, 32-core AMD, 62 GB RAM.
IDEA analyses Python more deeply, so "ready" doesn't mean the same work on
both sides. Both are measured from the outside, the same way: see
perf/compare to run it on your machine and projects.
Plugins
Plugins add actions, completion, quick fixes, tool windows, custom editors, themes, file icons and languages. They run as sandboxed WebAssembly components; themes, icon themes and languages need no code at all.
Install them from Settings › Plugins, or start your own with
openidea-plugin new — see Writing OpenIDEA plugins and
the official plugins. The plugin API is still a preview.
Community
-
Discord — questions, feedback and release news.
-
WeChat group — scan to join:
Contributors
License
Apache 2.0. Bundled third-party assets are listed in THIRD_PARTY_LICENSES.md.
Arduino sketches (.ino) have C++ syntax highlighting and code intelligence via Arduino
Language Server. For completion, signature help, hover and definition navigation, install
Arduino IDE 2 and the board's core. Configure the server command and arguments in
Settings > Languages & Frameworks > Language Servers, or set tool paths in settings.toml
using languages.arduino.cli, languages.arduino.clangd, languages.arduino.languageServer
and languages.arduino.cliConfig. OpenIDEA
automatically discovers the IDE's Arduino CLI, clangd and Arduino Language Server on
Windows, macOS and Linux; board FQBN is read from sketch.yaml or
languages.arduino.fqbn in settings.toml.
Not affiliated with JetBrains. IntelliJ IDEA is a trademark of JetBrains s.r.o.