Hacker News: benno128

Git-reabsorb: Reorganize Git commits with new structure using an LLM

benno128 — Fri, 28 Nov 2025 05:52:13 +0000

Article URL: https://github.com/AllyMarthaJ/git-reabsorb

Comments URL: https://news.ycombinator.com/item?id=46075879

Points: 6

# Comments: 2

MCP Servers are surprisingly easy. I made one that runs code in a sandbox

benno128 — Mon, 21 Jul 2025 22:42:12 +0000

Article URL: https://runno.dev/articles/mcp/

Comments URL: https://news.ycombinator.com/item?id=44641209

Points: 1

# Comments: 1

New comment by benno128 in "Show HN: A MCP server to evaluate Python code in WASM VM using RustPython"

benno128 — Tue, 20 May 2025 09:00:56 +0000

Yeah for sure: run it inside a virtual machine, or do some sort of docker magic.

You kind of need to pretend you are a whole computer for a programming language to be happy. There's built in assumptions they're running on a "real" computer. They assume they've got full access to network and disk. Installing packages often requires compiling C extensions, or running native binaries. All that stuff means the best way to sandbox is to virtualise a whole computer.

It's fun to do it with WebAssembly though, you get a lot of guarantees and it's quite light weight.

New comment by benno128 in "Show HN: A MCP server to evaluate Python code in WASM VM using RustPython"

benno128 — Tue, 20 May 2025 00:17:24 +0000

I've got one that uses WebAssembly to run Python, Ruby, C/C++, JS: https://runno.dev/articles/sandbox/

Runno/Sandbox: A WebAssembly Sandbox for Running Code in Node (etc)

benno128 — Mon, 19 May 2025 22:09:08 +0000

Article URL: https://runno.dev/articles/sandbox/

Comments URL: https://news.ycombinator.com/item?id=44035458

Points: 4

# Comments: 0

Show HN: MCP Server for secure code execution (Python, Ruby, C, and more)

benno128 — Sun, 18 May 2025 13:09:26 +0000

Article URL: https://github.com/taybenlor/runno/tree/main/packages/mcp

Comments URL: https://news.ycombinator.com/item?id=44021142

Points: 7

# Comments: 0

New comment by benno128 in "Ask HN: What are you working on? (March 2025)"

benno128 — Mon, 31 Mar 2025 00:01:13 +0000

Thanks! Yeah I'm very aware of Pyodide and interested in adopting some of their techniques.

A big difference between my approach and their approach is that Runno is generic across programming languages. Pyodide only works for Python (and can only work for Python).

Big interesting development in this space is the announcement of Endor at WASM IO which I'd like to try out: https://endor.dev/

New comment by benno128 in "Ask HN: What are you working on? (March 2025)"

benno128 — Sun, 30 Mar 2025 23:04:29 +0000

Working on Runno (https://runno.dev/) as a side project. It's a tool for running code in the browser for educational use.

[Edit]: I wrote a re-introduction to Runno: The WebComponent for Code over the weekend (https://runno.dev/articles/web-component/)

I've been playing around with turning it into a sandbox for running code in Python (https://runno.dev/articles/sandbox-python/). This would allow you to safely execute AI generated code.

Generally thinking about more ways to run code in sandbox environments, as I think this will become more important as we are generating a lot of "untrusted" code using Gen AI.

New comment by benno128 in "Endor: WASM-Based Servers in the Browser"

benno128 — Sun, 30 Mar 2025 09:26:53 +0000

Sounds really interesting. Where can I try it out? I struggled to find a link in the article.

Runno: The Web Component for Code

benno128 — Sun, 30 Mar 2025 07:15:26 +0000

Article URL: https://runno.dev/articles/web-component/

Comments URL: https://news.ycombinator.com/item?id=43522055

Points: 2

# Comments: 0

Show HN: I made a Python package for sandboxing code

benno128 — Thu, 23 Jan 2025 23:00:55 +0000

Article URL: https://runno.dev/articles/sandbox-python

Comments URL: https://news.ycombinator.com/item?id=42808962

Points: 2

# Comments: 0

Crashing your production app with iteration

benno128 — Wed, 25 Sep 2024 02:39:05 +0000

Article URL: https://shiplog.nspain.dev/posts/crashing-your-production-app-with-iteration/

Comments URL: https://news.ycombinator.com/item?id=41643181

Points: 1

# Comments: 0

New comment by benno128 in "Container2wasm: Convert Containers to WASM Blobs"

benno128 — Thu, 04 Jan 2024 05:58:18 +0000

Really impressed by the depth and breadth of this project, well done!

A particularly interesting part is the socket layer inside the browser. Other people solving this problem have previously used a proxy to a server that does the real socket implementation. This means you can't have a "browser-only" solution.

The author has solved this (for HTTP/S only) by proxying HTTP requests and then re-creating them as fetch requests (details here: https://github.com/ktock/container2wasm/tree/main/examples/n...). I'm very interested in using this approach for my own project Runno (https://runno.dev).

New comment by benno128 in "Container2wasm: Convert Containers to WASM Blobs"

benno128 — Thu, 04 Jan 2024 00:02:31 +0000

This is the use case I've been tackling with Runno (https://runno.dev), it's more performant than OP's approach but not as flexible.

New comment by benno128 in "Container2wasm: Convert Containers to WASM Blobs"

benno128 — Thu, 04 Jan 2024 00:00:42 +0000

There is support in Docker to run wasm-wasi binaries directly (see: https://wasmlabs.dev/articles/docker-without-containers/). The downside compared to OP's approach is that whatever you're running has to have already been compiled to wasm-wasi. The upside would be much faster execution time (no emulation overhead for x86).

New comment by benno128 in "Extism makes WebAssembly easy"

benno128 — Wed, 04 Oct 2023 22:10:34 +0000

I'm working on this problem as well and would be happy to sling you some thoughts and notes. Check my website https://runno.dev and send an email to the address on that website!

New comment by benno128 in "Running WASI binaries from your HTML using Web Components"

benno128 — Tue, 29 Aug 2023 03:03:14 +0000

Snapshot Preview 1 is the standard all tools are building to right now. The specification is available here: https://github.com/WebAssembly/WASI/blob/main/legacy/preview...

It's pretty unreadable though!

Preview 2 looks like it will be a big change, and is just being finalised at the moment. I'd expect that when preview 2 is available there will be an improvement in the quality of documentation. I'm not sure how long it will take after release for tools to start switching to it. I'd expect Preview 1 will still be the main target at least for the rest of this year.

New comment by benno128 in "Running WASI binaries from your HTML using Web Components"

benno128 — Mon, 28 Aug 2023 11:37:43 +0000

Yeah of course! They've got STDIN/STDOUT/STDERR and I've built a Virtual Filesystem. But if you're using WASI binaries locally they don't have that restriction.

You might be interested in WAGI: https://github.com/deislabs/wagi

And to catch up on WASI: https://xeiaso.net/talks/unix-philosophy-logical-extreme-was...

New comment by benno128 in "Running WASI binaries from your HTML using Web Components"

benno128 — Mon, 28 Aug 2023 09:57:07 +0000

Thanks for the feedback! It’s also cost me about $15 so far. I don’t think I’ll do that again, but it was fun as a demo!

New comment by benno128 in "Running WASI binaries from your HTML using Web Components"

benno128 — Mon, 28 Aug 2023 09:55:12 +0000

SPA sense. It’s cobbled together because I just have fun with it. Not sure why it’s temperamental, haven’t bothered investigating.