Origin
extism.org
October 20, 2025 at 6:12 AM
Extism - make all software programmable. Extend from within https://lobste.rs/s/3nizmq ##wasm
Extism - make all software programmable. Extend from within. | Extism - make all software programmable. Extend from within.
Extism is the open source, universal plug-in system. Extend all the software everywhere! Powered by WebAssembly.
extism.org
October 20, 2025 at 6:10 AM
Extism - make all software programmable. Extend from within https://lobste.rs/s/3nizmq ##wasm
New Blog Post: Extending Kafka the Hard Way (in which we inject #Wasm inside a Kafka broker using #Chicory, @extism and some elbow grease)
blog.evacchi.dev/posts/2025/0...
blog.evacchi.dev/posts/2025/0...
August 25, 2025 at 8:01 PM
New Blog Post: Extending Kafka the Hard Way (in which we inject #Wasm inside a Kafka broker using #Chicory, @extism and some elbow grease)
blog.evacchi.dev/posts/2025/0...
blog.evacchi.dev/posts/2025/0...
I'm interested in 2 other things:
1. Allowing users to write in any language (Python, Ruby, etc)
2. Extism takes about 6 seconds to compile to wasm, and I'd like a faster feedback loop for devs.
I built a reload function that evals code, but it's pretty hacky and occasionally crashes haha
1. Allowing users to write in any language (Python, Ruby, etc)
2. Extism takes about 6 seconds to compile to wasm, and I'd like a faster feedback loop for devs.
I built a reload function that evals code, but it's pretty hacky and occasionally crashes haha
August 5, 2025 at 9:23 PM
I'm interested in 2 other things:
1. Allowing users to write in any language (Python, Ruby, etc)
2. Extism takes about 6 seconds to compile to wasm, and I'd like a faster feedback loop for devs.
I built a reload function that evals code, but it's pretty hacky and occasionally crashes haha
1. Allowing users to write in any language (Python, Ruby, etc)
2. Extism takes about 6 seconds to compile to wasm, and I'd like a faster feedback loop for devs.
I built a reload function that evals code, but it's pretty hacky and occasionally crashes haha
Thanks! That was a great read! I've been looking at options for a wasm plug-in library for a web app and somehow compenentizejs never came up. The closest I could find was extism (using quickjs runtime), and it seems so segfault randomly haha
August 5, 2025 at 9:20 PM
Thanks! That was a great read! I've been looking at options for a wasm plug-in library for a web app and somehow compenentizejs never came up. The closest I could find was extism (using quickjs runtime), and it seems so segfault randomly haha
Extism: multi-language plugin system based on WebAssembly https:// extism.org # ECMAScript # JavaScript
Interest | Match | Feed
Interest | Match | Feed
Origin
mastodon.online
July 28, 2025 at 4:24 PM
🚀 loader(js) @ 0.0.31
Upgrades to the latest extism SDKs. While the APIs for extism stabilize, the team recommends aggressively keeping your SDK up to date. This is because the team is working on host functions, and a plugin built with a newer PDK won't run on an older SDK.
Upgrades to the latest extism SDKs. While the APIs for extism stabilize, the team recommends aggressively keeping your SDK up to date. This is because the team is working on host functions, and a plugin built with a newer PDK won't run on an older SDK.
May 30, 2025 at 2:28 AM
🚀 loader(js) @ 0.0.31
Upgrades to the latest extism SDKs. While the APIs for extism stabilize, the team recommends aggressively keeping your SDK up to date. This is because the team is working on host functions, and a plugin built with a newer PDK won't run on an older SDK.
Upgrades to the latest extism SDKs. While the APIs for extism stabilize, the team recommends aggressively keeping your SDK up to date. This is because the team is working on host functions, and a plugin built with a newer PDK won't run on an older SDK.
Last Thursday/Friday on stream, we built out a model "Pack" that shows off some of Taskless' WebAssembly capabilities. It's now open sourced, because I'd rather it be out there with a lot of README todo comments than never shipped at all.
🚀 github.com/taskless/pac...
#WebAssembly #WASM #extism
🚀 github.com/taskless/pac...
#WebAssembly #WASM #extism
GitHub - taskless/pack-example: An example WebAssembly Pack for Taskless, highlighting the platform's capabilities
An example WebAssembly Pack for Taskless, highlighting the platform's capabilities - taskless/pack-example
github.com
May 27, 2025 at 7:35 PM
Last Thursday/Friday on stream, we built out a model "Pack" that shows off some of Taskless' WebAssembly capabilities. It's now open sourced, because I'd rather it be out there with a lot of README todo comments than never shipped at all.
🚀 github.com/taskless/pac...
#WebAssembly #WASM #extism
🚀 github.com/taskless/pac...
#WebAssembly #WASM #extism
Ebitengine + WASM, using go-plugin - I think it's something up with the bindings? Since then I've moved to Extism and using Bebop for serialization; it's going well!
May 21, 2025 at 1:42 PM
Ebitengine + WASM, using go-plugin - I think it's something up with the bindings? Since then I've moved to Extism and using Bebop for serialization; it's going well!
http-wasm.io describes a Wasm ABI to create http handlers, which can be used to build middleware, think FAAS and Cloud Workers with Extism.
In the screenshots the Enhance SSR Extism plugin is triggered during the request/response cycle, transforming the response.
In the screenshots the Enhance SSR Extism plugin is triggered during the request/response cycle, transforming the response.
http-wasm: HTTP functions implemented in WebAssembly
http-wasm.io
May 15, 2025 at 8:50 PM
http-wasm.io describes a Wasm ABI to create http handlers, which can be used to build middleware, think FAAS and Cloud Workers with Extism.
In the screenshots the Enhance SSR Extism plugin is triggered during the request/response cycle, transforming the response.
In the screenshots the Enhance SSR Extism plugin is triggered during the request/response cycle, transforming the response.
oh sorry, i meant github.com/wasm3/wasm3. extism looks really promising though, thank you for the pointer
GitHub - wasm3/wasm3: 🚀 A fast WebAssembly interpreter and the most universal WASM runtime
🚀 A fast WebAssembly interpreter and the most universal WASM runtime - wasm3/wasm3
github.com
April 27, 2025 at 5:43 PM
oh sorry, i meant github.com/wasm3/wasm3. extism looks really promising though, thank you for the pointer
p3 is cool, but unsure how long it will take guest languages to support it.
You may want to look at extism if you want broad language support
You may want to look at extism if you want broad language support
April 27, 2025 at 5:40 PM
p3 is cool, but unsure how long it will take guest languages to support it.
You may want to look at extism if you want broad language support
You may want to look at extism if you want broad language support
@extism.bsky.social can do that! github.com/extism/pytho...
GitHub - extism/python-pdk: Write Extism plugins in Python
Write Extism plugins in Python. Contribute to extism/python-pdk development by creating an account on GitHub.
github.com
April 20, 2025 at 10:10 PM
@extism.bsky.social can do that! github.com/extism/pytho...
I think a really advanced user is going to start to want to optimize, but mostly around the ability to design very specific host functions and custom host function signatures. Think of this like bindings to OS or host application system calls.
For most things we see, extism is more than enough!
For most things we see, extism is more than enough!
April 12, 2025 at 11:35 PM
I think a really advanced user is going to start to want to optimize, but mostly around the ability to design very specific host functions and custom host function signatures. Think of this like bindings to OS or host application system calls.
For most things we see, extism is more than enough!
For most things we see, extism is more than enough!
Makes sense to me. Is there a feature or class of problem you’ve seen as the point where folks benefit from that switch?
1) build on wasm with pyodide/extism
2. <something blocked by that abstraction>
3. Dive in
Is it optimization?
1) build on wasm with pyodide/extism
2. <something blocked by that abstraction>
3. Dive in
Is it optimization?
April 12, 2025 at 11:30 PM
Makes sense to me. Is there a feature or class of problem you’ve seen as the point where folks benefit from that switch?
1) build on wasm with pyodide/extism
2. <something blocked by that abstraction>
3. Dive in
Is it optimization?
1) build on wasm with pyodide/extism
2. <something blocked by that abstraction>
3. Dive in
Is it optimization?
I am biased, but the most beginner-friendly approach is to just get started with something that works out of the box, make progress & get a quick win.
For that, we made github.com/extism/extism
Once you start to see how the pieces fit together, then you can start to break down the abstractions.
For that, we made github.com/extism/extism
Once you start to see how the pieces fit together, then you can start to break down the abstractions.
GitHub - extism/extism: The framework for building with WebAssembly (wasm). Easily load wasm modules, move data, call functions, and build extensible apps.
The framework for building with WebAssembly (wasm). Easily load wasm modules, move data, call functions, and build extensible apps. - extism/extism
github.com
April 12, 2025 at 11:14 PM
I am biased, but the most beginner-friendly approach is to just get started with something that works out of the box, make progress & get a quick win.
For that, we made github.com/extism/extism
Once you start to see how the pieces fit together, then you can start to break down the abstractions.
For that, we made github.com/extism/extism
Once you start to see how the pieces fit together, then you can start to break down the abstractions.
If your consumer is also Kotlin, the multiplatform stuff is complete and capable.
If your consumer is other Wasm things, the ecosystem is maturing. Take a look at Extism!
If your consumer is other Wasm things, the ecosystem is maturing. Take a look at Extism!
Extism
The cross-language framework for building with WebAssembly (wasm). - Extism
github.com
April 2, 2025 at 7:01 PM
If your consumer is also Kotlin, the multiplatform stuff is complete and capable.
If your consumer is other Wasm things, the ecosystem is maturing. Take a look at Extism!
If your consumer is other Wasm things, the ecosystem is maturing. Take a look at Extism!
Say goodbye to steep learning curves! 🚀 Johan Janssens introduces Extism & WebAssembly to make creating PHP extensions easier with JavaScript, Rust, and Go. 🌐 Unlock new possibilities for your PHP apps!
➡️ https://m.mtrbio.com/wkqdsdngsv ⬅️
#PHP #WebAssembly
➡️ https://m.mtrbio.com/wkqdsdngsv ⬅️
#PHP #WebAssembly
March 4, 2025 at 10:10 AM
Say goodbye to steep learning curves! 🚀 Johan Janssens introduces Extism & WebAssembly to make creating PHP extensions easier with JavaScript, Rust, and Go. 🌐 Unlock new possibilities for your PHP apps!
➡️ https://m.mtrbio.com/wkqdsdngsv ⬅️
#PHP #WebAssembly
➡️ https://m.mtrbio.com/wkqdsdngsv ⬅️
#PHP #WebAssembly
Slides from my talk "WebAssembly, Extend Anything with Everything, Everywhere! " at #confoo are online. gamma.app/docs/Extism-...
Showed how to extend #frankenphp with an @extism.bsky.social / #wasi markdown middleware plugin, generating html at 3k req/s. Kudos to @dunglas.dev, FrankenPHP rocks!
Showed how to extend #frankenphp with an @extism.bsky.social / #wasi markdown middleware plugin, generating html at 3k req/s. Kudos to @dunglas.dev, FrankenPHP rocks!
Extism - Make all software programmable | Confoo 2025
Extism is a cross-language plugin framework for building with WebAssembly. It's goal is to make all software programmable.
gamma.app
February 26, 2025 at 7:45 PM
Slides from my talk "WebAssembly, Extend Anything with Everything, Everywhere! " at #confoo are online. gamma.app/docs/Extism-...
Showed how to extend #frankenphp with an @extism.bsky.social / #wasi markdown middleware plugin, generating html at 3k req/s. Kudos to @dunglas.dev, FrankenPHP rocks!
Showed how to extend #frankenphp with an @extism.bsky.social / #wasi markdown middleware plugin, generating html at 3k req/s. Kudos to @dunglas.dev, FrankenPHP rocks!
When you want to simplify function calls by the host, you will code helpers for that, but for a single language, and then you will need to do it for other languages on both the host and WebAssembly module sides. Extism does it for you. Extism is kind of like the Apache Commons of WASI.
February 23, 2025 at 8:12 PM
When you want to simplify function calls by the host, you will code helpers for that, but for a single language, and then you will need to do it for other languages on both the host and WebAssembly module sides. Extism does it for you. Extism is kind of like the Apache Commons of WASI.
I also share this sentiment. The component model feels it wont get enough adoption, despite its good vision. On the other hand extism seems like "non-standard" way of doing wasm plugins. And therefore I'm bit hesitant using it. But since it's getting popular it eventually become the standard...
February 23, 2025 at 8:01 PM
I also share this sentiment. The component model feels it wont get enough adoption, despite its good vision. On the other hand extism seems like "non-standard" way of doing wasm plugins. And therefore I'm bit hesitant using it. But since it's getting popular it eventually become the standard...