• Kapendev (24/24) Mar 17 Hey. I've been working on basic WASI P1 support for my library,
• Kapendev (15/17) Mar 19 I added [WASM-4](https://wasm4.org/) support for the gamers.

Kapendev <alexandroskapretsos gmail.com> writes:

Hey. I've been working on basic WASI P1 support for my library, 
[Joka](https://github.com/Kapendev/joka). It's a "no GC" library.
This post exists because I wanted to ask if anybody wants to 
write a CLI with it to test if things work correctly.

Example:

```d
// File: app.d
import joka.wasip1;
import joka.types;

extern(C)
void _start() {
     auto value = 40 + 29;
     auto text = "Value is: {}\n".fmt(value).toCiovec();
     fdWrite(stdout, &text, 1, null);
}
```

Compile and run with [Wasmtime](https://wasmtime.dev/):

```
ldc2 -betterC -i --mtriple=wasm32-wasi --checkaction=halt 
--d-version=JokaTypesStubs app.d
wasmtime app.wasm
```

You will need the latest commit to get things working.
Any feedback is welcome.

Kapendev <alexandroskapretsos gmail.com> writes:

On Tuesday, 17 March 2026 at 10:43:36 UTC, Kapendev wrote:
 This post exists because I wanted to ask if anybody wants to 
 write a CLI with it to test if things work correctly.

I added [WASM-4](https://wasm4.org/) support for the gamers.
No wasi-libc needed because both the string and math modules of 
Joka work without it.

A basic [project 
template](https://github.com/Kapendev/joka/tree/main/scripts/wasm4_template) is
available in Joka's scripts folder.
To get started, copy the contents of that folder into your 
project folder.
A project should follow this structure:

```
my_wasm4_project/
├── app.d
├── joka/
└── run
```