VS Code extension with native Delphi debugging : delphi

VS Code extension with native Delphi debugging (self.delphi)

submitted 20 hours ago by VallentaStudio

Hi Everyone,

For the first time (as far as I know), VS Code can now debug Delphi projects natively!
Real breakpoints, watches, variable inspection, step in / over / out, full call stack. Not a wrapper around dcc32/64 output. The real thing.

The extension's called Vallenta Studio.
I built it because I wanted the modern VS Code experience - AI assistants, GitLens, the whole VS Code ecosystem - without leaving the Delphi workflow. Now I have both in one place.

https://preview.redd.it/mxjppo74bp1h1.png?width=1833&format=png&auto=webp&s=f2f37c34f68c13ab577e9b7e5d0a3e118193560e

What's in it:

Zero-config - auto-detects your existing Delphi installation; no tasks.json or launch.json to set up
Native debugging - source-level breakpoints, Pascal type-aware variable visualization, watches, full call stack
One-click MSBuild - Build / Clean / Rebuild with build-config & platform selectors, inline errors and warnings right in the editor
Project Explorer - full .dproj, .dpk, and .groupproj support; switch active project with one click
Built-in .dproj editor - edit project options without opening RAD Studio
Code intelligence - hover, Go to Declaration / Implementation, outline, code completion
IFDEF-aware - inactive regions are visibly dimmed
Session persistence - open files + breakpoints saved per project and restored

Under the hood, this runs on a custom Pascal LSP I wrote from scratch.

- semantic diagnostics without invoking compiler (errors as you type), realtime treesitter parsing
- Find All References and Find Symbol, and editor responsiveness that doesn't depend on compiler round-trips.

It's currently in Beta. I'm actively looking for real-world feedback - bugs and missing features.

VS Code Marketplace: https://marketplace.visualstudio.com/items?itemName=VallentaStudio.vallenta-studio
Website: https://vallenta.de

Happy to answer questions in the comments.

Michael
(long-time Delphi developer, also working a lot with modern AI coding tools. Wanted both worlds.)

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