7 ms·

The Architecture Behind Lovable and Bolt

73 points by Mernit 1y ago

WXLCKNO 1y ago
"We’ll be using FastMCP, a lightweight framework for building model-control-plane servers" Article written by AI (and not reviewed by humans) that doesn't know MCP is model context protocol? Or author being intentional for some weird reason?
- owebmaster 1y ago
  Looks like AI slop
  - Mernit 1y ago
    We initially wrote this for a less technical audience (where we spelled out MCP), then edited it to post here - it's not AI, it's just bad editing from my part. Fixed now.
    - arolihas 1y ago
      I'm confused by your explanation. You originally spelled out MCP and then edited it. Did you originally have it as model context protocol and then edited it to model control plane? Or did you originally have it spelled out as model control plane and missed it in editing?
    - deleted 1y ago
      [deleted]
- atleastoptimal 1y ago
  The Model-Context-Protocol/Mode Control Plane mix up seems to come up a lot in AI slop articles. I assume its because most AI models’ training cutoff was before Model context protocol became a big thing. You can see it here too https://www.unleash.so/post/model-control-plane-mcp-for-ai-agents-enabling-modular-scalable-agentic-systems https://www.unleash.so/post/model-control-plane-mcp-for-ai-a...
  - theamk 1y ago
    And soon, articles like that one will be ingested into next generation of models, and they would become a bit more nonsensical...
    - atleastoptimal 1y ago
      AI models are becoming better and better though. Data quality is a known issue and this won’t stop scaling up
tezza 1y ago
Q: Has anyone on HN built anything meaningful with Lovable/Bolt? Something that works as intended? I’ve tried several proof of concepts with Bolt and every time just get into a doom loop where there is a cycle of breakage, each ‘fix’ resurrecting a previous ‘break’
- CodingJeebus 1y ago
  [dead]
- velcrovan 1y ago
  I too have tried them and would like to know this.
- solarkraft 1y ago
  I recently played a little story based game that was hosted on Lovable. It worked reasonably well!
- dustincoates 1y ago
  It depends how you define meaningful. I built a daily newsletter with myself as the only recipient using v0. It hits the Gemini API and returns a short story based on a historical event from that day in the language(s) that I'm learning, along with a translation, transliteration where applicable, vocabulary list from the story, and grammar tips. I've had work in the past where I spent way too long building email templates, so having that all done for me, along with the script for sending the mail, was useful. It took an afternoon project that I probably would have abandoned, into an hour project. With that said, I'm pretty bearish on these platforms, because I think you can't build anything beyond a toy like that. And for toys or short scripts, Claude, Gemini, ChatGPT are usually good enough.
- janpot 1y ago
  was quite impressed after building my label maker application [1] and stylex playground [2]. Had some real world needs and both were built in bolt with 99% of edits made through prompts. My tips would mostly center around: - don't try to fix mistakes, revert and try with an updated prompt. the context seems to get polluted otherwise. - don't treat it as a black box, inspect the generated code and prompt to write specific abstractions. don't just tell it what to build, but also how. this is where experienced programmers will get way more mileage. [1] https://courageous-toffee-e5dd6f.netlify.app/ https://courageous-toffee-e5dd6f.netlify.app/ [2] https://venerable-melomakarona-255f96.netlify.app/ https://venerable-melomakarona-255f96.netlify.app/
transformi 1y ago
Looks like an ad... BTW there are more sandboxes code- here is OSS one: Daytona https://github.com/daytonaio/daytona https://github.com/daytonaio/daytona
- Mernit 1y ago
  The only Beam-specific part are the sandboxes, but those can easily be swapped out for the vendor of your choice. The architecture we described isn't exclusive to our product. Beam is fully OSS BTW: https://github.com/beam-cloud/beta9 https://github.com/beam-cloud/beta9
- handfuloflight 1y ago
  Fighting what you perceive to be an ad... with another ad?
bnchrch 1y ago
Im always hunting for someone whos solved "sandboxing" because setting it up myself is so damn painful. Anyone ever find a good product in this space? Beam seems close, but not quite
- Mernit 1y ago
  what is missing for you?
- nicolaslecomte 1y ago
  Blaxel & E2B use microVMs which is usually the standard for this kind of worloads. E2B feels more ephemeral while Blaxel feels more stateful, depends on what you're looking for. Daytona uses containers, less secure than VMs. I heard Vercel & Cloudflare launched a sandboxes offering too. Haven't tried it yet but i'm naturally wary of the marketing fluff around their annoucements
  - transformi 1y ago
    i see they mostly offer api to run the sandbox on their infra...is there a way to host the sandboxes self hosted?(how much memory/compute needed?)
- jetter 1y ago
  A list of sandboxing techniques and products: https://github.com/restyler/awesome-sandbox https://github.com/restyler/awesome-sandbox
wyxuan 1y ago
Isn't the whole point of Bolt/stackblitz that you can run node js clientside via wasm, so it's more lightweight? Did they migrate away to a more server heavy model?

73 points by Mernit 1y ago

"We’ll be using FastMCP, a lightweight framework for building model-control-plane servers" Article written by AI (and not reviewed by humans) that doesn't know MCP is model context protocol? Or author being intentional for some weird reason?

owebmaster 1y ago
Looks like AI slop
- Mernit 1y ago
  We initially wrote this for a less technical audience (where we spelled out MCP), then edited it to post here - it's not AI, it's just bad editing from my part. Fixed now.
  - arolihas 1y ago
    I'm confused by your explanation. You originally spelled out MCP and then edited it. Did you originally have it as model context protocol and then edited it to model control plane? Or did you originally have it spelled out as model control plane and missed it in editing?
  - deleted 1y ago
    [deleted]
atleastoptimal 1y ago
The Model-Context-Protocol/Mode Control Plane mix up seems to come up a lot in AI slop articles. I assume its because most AI models’ training cutoff was before Model context protocol became a big thing. You can see it here too https://www.unleash.so/post/model-control-plane-mcp-for-ai-agents-enabling-modular-scalable-agentic-systems https://www.unleash.so/post/model-control-plane-mcp-for-ai-a...
- theamk 1y ago
  And soon, articles like that one will be ingested into next generation of models, and they would become a bit more nonsensical...
  - atleastoptimal 1y ago
    AI models are becoming better and better though. Data quality is a known issue and this won’t stop scaling up

tezza 1y ago

Q: Has anyone on HN built anything meaningful with Lovable/Bolt? Something that works as intended? I’ve tried several proof of concepts with Bolt and every time just get into a doom loop where there is a cycle of breakage, each ‘fix’ resurrecting a previous ‘break’

CodingJeebus 1y ago
[dead]
velcrovan 1y ago
I too have tried them and would like to know this.
solarkraft 1y ago
I recently played a little story based game that was hosted on Lovable. It worked reasonably well!
dustincoates 1y ago
It depends how you define meaningful. I built a daily newsletter with myself as the only recipient using v0. It hits the Gemini API and returns a short story based on a historical event from that day in the language(s) that I'm learning, along with a translation, transliteration where applicable, vocabulary list from the story, and grammar tips. I've had work in the past where I spent way too long building email templates, so having that all done for me, along with the script for sending the mail, was useful. It took an afternoon project that I probably would have abandoned, into an hour project. With that said, I'm pretty bearish on these platforms, because I think you can't build anything beyond a toy like that. And for toys or short scripts, Claude, Gemini, ChatGPT are usually good enough.
janpot 1y ago
was quite impressed after building my label maker application [1] and stylex playground [2]. Had some real world needs and both were built in bolt with 99% of edits made through prompts. My tips would mostly center around: - don't try to fix mistakes, revert and try with an updated prompt. the context seems to get polluted otherwise. - don't treat it as a black box, inspect the generated code and prompt to write specific abstractions. don't just tell it what to build, but also how. this is where experienced programmers will get way more mileage. [1] https://courageous-toffee-e5dd6f.netlify.app/ https://courageous-toffee-e5dd6f.netlify.app/ [2] https://venerable-melomakarona-255f96.netlify.app/ https://venerable-melomakarona-255f96.netlify.app/

transformi 1y ago

Looks like an ad... BTW there are more sandboxes code- here is OSS one: Daytona https://github.com/daytonaio/daytona https://github.com/daytonaio/daytona

Mernit 1y ago
The only Beam-specific part are the sandboxes, but those can easily be swapped out for the vendor of your choice. The architecture we described isn't exclusive to our product. Beam is fully OSS BTW: https://github.com/beam-cloud/beta9 https://github.com/beam-cloud/beta9
handfuloflight 1y ago
Fighting what you perceive to be an ad... with another ad?

bnchrch 1y ago

Im always hunting for someone whos solved "sandboxing" because setting it up myself is so damn painful. Anyone ever find a good product in this space? Beam seems close, but not quite

Mernit 1y ago
what is missing for you?
nicolaslecomte 1y ago
Blaxel & E2B use microVMs which is usually the standard for this kind of worloads. E2B feels more ephemeral while Blaxel feels more stateful, depends on what you're looking for. Daytona uses containers, less secure than VMs. I heard Vercel & Cloudflare launched a sandboxes offering too. Haven't tried it yet but i'm naturally wary of the marketing fluff around their annoucements
- transformi 1y ago
  i see they mostly offer api to run the sandbox on their infra...is there a way to host the sandboxes self hosted?(how much memory/compute needed?)
jetter 1y ago
A list of sandboxing techniques and products: https://github.com/restyler/awesome-sandbox https://github.com/restyler/awesome-sandbox

wyxuan 1y ago

Isn't the whole point of Bolt/stackblitz that you can run node js clientside via wasm, so it's more lightweight? Did they migrate away to a more server heavy model?