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serafim
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The most underrated tech podcast right now?
Probably Access.
@hamburger and @alexeheath are casually getting guests like:
Mark Zuckerberg (@finkd) from Meta
Mike Krieger (@mikeyk) from Anthropic
Melanie Perkins (@MelanieCanva) from Canva
Steve Huffman from Reddit
Ivan Zhao (@ivanhzhao) from Notion
And the conversations are actually good too.
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grab it as a starting point or rip out the parts you need.
github.com/21st-dev/21st-…
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built a video editor agent on @21st_dev SDK.
→ real NLE timeline - drag, trim, split, ripple delete, undo/redo
→ chat that edits your timeline live (you drag, agent types, project stays in sync)
→ ffmpeg renders inside the agent - no vendor API, no per-minute fees
→ text overlays, volume mixing, 16:9 / 9:16 / 1:1 output
100% open-source. you can run it in 60 seconds 🧵
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serafim retweetledi
Building a prototype for managing cloud AI agents.
When an agent asks for approval, the next state change has to feel traceable.
After clicking Approve, the card moves from “Waiting approval” to “Running” instead of instantly re-rendering somewhere else.
Motion here isn’t decoration. It explains causality.
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serafim retweetledi
introducing Reelful
from a camera roll to a finished reel in just 10 minutes
live on the App Store now! by the end of the year, all short videos on the internet will be created with Reelful!
the ending is so funny 🤣😀
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A closer look at the Spiral Loader Lottie animation inspired by Notion. I really liked it and wanted it for personal use, but decided to share it as well!
serafim@serafimcloud
Introducing @21st_dev Agent Elements Diffed edits. Plan approvals. Clarifying questions. Sub-agents. Tool cards. The pieces every "agent UI" lib skips. 25 @shadcn /ui components built for the new generation of agents that use your computer. Open-source. Link in thread 🧵
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Agent Elements is the UI layer of @21st_dev's Agent SDK - use the whole stack, or just these components.
📖 Docs: agent-elements.21st.dev
⭐ Github: github.com/21st-dev/agent…
Built by @Ibelick and me (@serafimcloud)
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the system prompt is 40% Lottie cheatsheet.
ty:4 shape layers, ks transforms with a:0/a:1 animation, bezier paths, fl/st for fill + stroke, colors as [r,g,b,a] in 0..1, ip/op frame windows...
hand Claude the schema rules inline and it writes valid Bodymovin v5.7+ first-shot.
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built a Lottie animation generator agent on @21st_dev SDK.
→ prompt → valid Bodymovin JSON (shape layers, keyframed transforms, bezier paths)
→ live preview + scrubbable timeline with hover-scrub
→ copy json or one-click download
→ thinking banner with live phase hints while the agent writes
100% open-source. you can run it in 60 seconds 🧵
serafim@serafimcloud
built a thread generator agent on @21st_dev SDK. → drafts X threads end-to-end → ray.so-style code blocks, 18 themes → matches your voice from a X handle → OG link previews + inline video cards 100% open-source. you can run it in 60 seconds 🧵
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