@svelte.dev helps us build snappy and accessible websites. Its small learning curve and lightweight size make it a great middle ground between vanilla JS and heavier frameworks. We're giving Svelte $3,380.71 this year to show our gratitude for their work 🌟

Cool video from @mattpocock.com even tho it's not exactly the original Ralph (which only poke with the same prompt until complete) is probably more powerful. What's funny is that we went from LLM answering a msg to Agents adding a loop and now we are adding another loop. Next step? Another loop? 😁

We released a Svelte Skill! It will teach your agent to use the svelte CLI to invoke the same tools as the MCP! We also released a subagent so that docs and iterations with the autofixer don't take up precious context! And you can get all of that easily because the repo is now a Marketplace! 🧡

My PR to opencode for MCP resources has been merged and released! Resources are also an underutilized primitive of MCP, the svelte MCP server uses it so that if you know you need a specific docs page for your task you can just include it upfront. Here you can see Opus 4.5 describe async svelte! 🧡

Just tested something with the svelte MCP...we will release a claude code plugin soon which includes a skill but also I just realized that having a sub agent is a no-brainer: each file edit can be done in a subagent which means no context bloat at all. Will also build an opencode plugin for that! 😍

Even rust is using svelte 😎😎😎

Usual PR maintenance for opencode: - open a PR - merge back the 120 new commits on main every 6 hr or so - repeat until merged

More and more big companies pick svelte 😍🧡😍

Happy new year from Italy 🧡

I lied...I couldn't resist...3334 😁

Finally, opencode supports MCP prompts (this was the PR I was waiting to get released)! I already switched to it as my daily driver, now it will be much better (prompts are a powerful MCP primitive and I use it every time with the svelte MCP). Next: resources! I already have them working locally! 😎

Update 3333...I could add another commit probably but I'll wait for tomorrow so I have a cooler total contribution number lol Cc. @jyc.dev

Of course the biggest pause in opencode releases happens after my PR is merged lol

Decent 3331 contributions. Worked on `tmcp` a lot, which got me more into AI in general. Still cautiously skeptical but I can say I'm a regular user. We launched the svelte MCP and we are working on the new bench. I would've loved to contribute more to svelte core, I'll try to do more next year. 🧡

I'm very hyped about Svelte Bench 2.0...this will help evaluate the MCP so when we change something we know it's helpful, it will help evaluate models so we can suggest the best and it will help improve the MCP because we'll have a clear view on what and how the AI is wrong. Suggest some test pls 🧡

Advent of Svelte 2025 was great 🎉 So many styles, so much diversity. Loved it 🧡 Have a nice end of the year See you next `pnpm i`

It's almost time..but wait, what's that flicker? Server and client discrepancies 😡 that you can now fix with `hydratable`! Even better, you can fetch on the server and NOT refetch on the client! Checkout the last day of Advent of Svelte, thanks for following along! advent.sveltesociety.dev/2025/24

Today's gift is for our future overlords. Help them to write proper Svelte 5 code by installing the Svelte MCP server for them! Even Hal9000 was excited about it! 🧡 advent.sveltesociety.dev/2025/23

Just published v0.1.16 of the Svelte MCP...now the tools are also exposed as JS API if you install it as a package...and the CLI can execute the tools inline! 🧡 npx @sveltejs/mcp svelte-autofixer 'some code' npx @sveltejs/mcp get-documentation 'svelte/$state' Will use this in the official skill 👀

If you want to have an idea of how much I talk about svelte: todays Advent of Svelte host is...my wife! I talked so much about Svelte that she wanted to be a part of AOS! And tbf, she slayed it! Learn how to use createContext directly from her! advent.sveltesociety.dev/2025/21

This was meant to be yesterday Advent of Svelte but we decided to go meta and render it out of order lol Checkout the magic being out of order rendering, how svelte avoid waterfalls (spoiler, we are a compiler MOFOs). 🧡 advent.sveltesociety.dev/2025/20

Just realized Claude can now have a Skill issue

Join me for what will be the quickest episode of This Week In Svelte so far! :sweat_smile: But at least we can say Happy Christmas to each other and part ways til next year (and if you have any questions, we can hang out a bit)! :orange_heart: Live in 8 minutes or so! youtube.com/live/rZIhgN7...

To take advantage of today's Advent of Svelte you just need to update SvelteKit. But you can use this info to show how cool is your framework when you talk with your drunk uncle during Christmas dinner...so that's a win. 🧡 advent.sveltesociety.dev/2025/19

I just cooked a carbonara so bad I legitimately worry about my Italian license. And tbf I would be willing to give that away because I just committed an Italian crime.

Can't wait to binge watch this 🍿

What the fork? How can we start preloading the data if a state change is required for the derived to trigger in async svelte? Let me show you how in today's Advent of Svelte 🧡 advent.sveltesociety.dev/2025/18

We just released a new version of the Svelte MCP server with updated prompt and descriptions...it should hopefully steer the LLM into requesting the documentation pages less and using more the autofixer (which should lead to a decreased usage of tokens). Please try and report in case it goes bad! 🧡

Snag Puru now!

My turn to showcase something about svelte! Join me in today's Advent of Svelte to learn what $state.eager is and when is it useful! advent.sveltesociety.dev/2025/17

@raycast.com wrapped is here 😍

Don't get me wrong, I love the idea of MCP UI and the fact that is used in ChatGPT is awesome...but seeing a lot of people going "Hey I build an MCP app...take a look" [proceed to show an app that doesn't interact with the LLM in any meaningful way] Is making a disservice to how awesome it is.

Optimistic updates are crucial to make your app feel snappy...and is never been easier to do it in SvelteKit...all remote functions come with a method specifically designed for it! Check out with @dummdidumm.bsky.social how to do it in 1, 2, 3! 🧡 advent.sveltesociety.dev/2025/16

I started writing tmcp because the official SDK had some design choices I didn't agree with. I still like tmcp api better but props where is due the official SDK came a long way. They just merged a transport that uses web request and web response. 🤟🏻

I have to be honest: I'm not a fan of the `command` remote function because it only works with JavaScript...but you know, sometimes you do have a situation where it could be useful (not really but who knows). So why not learn it in today Advent of Svelte? 🧡 advent.sveltesociety.dev/2025/15

Just released a v1.19.0 of tmcp: some nice QoL utils to create tool/resource/prompt in a separate module. This also unlock implementing sampling with tools in a nice way...new protocol version is shaping up! 😎 Thanks to @ieedan.bsky.social and @reinhold.is for the idea and the fantastic feedback 🧡

Confirmed...biggest Typescript crime committed. I'll probably have my licence revoked. 😄

Tonight I'm committing typescript crimes

Today Advent of Svelte is all about prerender... it's a sleeper imho. It can unlock rendering prerendered data in a dynamic page 🤯 And it will probably unlock some very cool features in the near future 👀👀👀 Check it out 🧡 advent.sveltesociety.dev/2025/14

I forgot to post last two days so here we come Follow the GOAT, @dummdidumm.bsky.social himself while he dive into remote functions...query and form are the first two steps to make your SvelteKit app as cool as you'll ever see 🧡 advent.sveltesociety.dev/2025/12 advent.sveltesociety.dev/2025/13

Alright I've implemented prompts myself and should get merged soon...then resources. Man, I Just love open source so much

Going live now to talk about the Svelte MCP server at @mcpdevsummit.ai Join in! 🧡 www.youtube.com/watch?v=9XBp...

Had a chitty chat with @kevinak.se @brittneypostma.bsky.social and @reinhold.is about Svelte Custom Renderers API...where we are at, how we approached building it and what it could unlock for svelte...check it out! 🧡

I have to be honest... I'm enjoying Advent of Svelte, but the production quality of these videos is insane: mine are way simpler 🫣 But nothing scares me more than the 404 monster... luckily, I don't have to worry thanks to SvelteKit and this video from @jyc.dev 🧡 advent.sveltesociety.dev/2025/11

Tune in at 18:30 CET for a brand new episode of The Context where our very own @paolo.ricciuti.me will talk about how he lead the development of the Svelte MCP server and the novel techniques used to teach Llama how to Svelte 🙌

Now that opencode supports Auth for MCP server I could almost switch to it as my daily driver...if only it supported resources and prompts 😭 Cc. @thdxr.com @adam.dev

@kenthropic.com become a Svelte Ambassador exactly at the right moment (actually too late but at least before Advent of Svelte) to delight our days with his wonderful videos. Today, a very classy @kenthropic.com teaches you about classes in Svelte 🧡 advent.sveltesociety.dev/2025/10

Tomorrow I'll go live for The Context to show how we built the MCP server for svelte and what novel techniques we are using to get LLMs to finally get svelte 5 🧡

For Christmas gift your codebase a safe net...write more unit tests! Follow Ben for today Advent of Svelte, where it talks about how to write unit tests for svelte 🧡 advent.sveltesociety.dev/2025/9

Follow @fubits.dev on Day 8 to learn how to best setup your editor for Svelte development 🧡 advent.sveltesociety.dev/2025/8