fx v0.0.14
libfx is now durable out of the box. Same API on local, Vercel and DIY.
- Sessions survive crashes, redeploys & timeouts
- Power cloud agents with ChatGPT & Grok subscriptions
- Custom providers & local model support in libfx
- Run multiple libfx agents in one app
- More control over each libfx session
- TypeScript types for libfx's public APIs
- Ported to Zig 0.17
- Multiple bug fixes & security improvements
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wanted this since we started fx but oh well 🎨
now supports themes.
Bring any VS Code theme or make your own, drop it in ~/.fx/themes and pick it in your settings.
Gemini 4 Argon is live in fx.
50% till Dec 1st via AI Gateway. Try now!
Simpler the better.
Coding CLIs keep getting more complicated. Daemons, 3 layers of TUIs, client-server architectures.
The whole point of a CLI is to deliver intelligence with zero friction, and be unix-like.
💾 Try It's 6mb, starts in milliseconds, model-agnostic. It's tastefully minimal: MCP, Skills, Subagents and ACP built-in.
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So good 🤌🏻
fx v0.0.13
Ultrafast support. Faster launch, shell calls & exits.
• Ultrafast for supported OpenAI models
• Launch up to 23× faster
• Shell calls up to 8.6× faster
• Exits up to 44× faster
• Configurable automatic compaction
• Multiple bug fixes & security improvements
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fx v0.0.12
Faster sessions. Better Markdown. More reliable long running work.
• Session listing up to 560× faster
• Large session stores resume instantly
• Better GitHub-flavored Markdown
• Better scrollback, steering & session recovery
• Improved MCP reliability & security
• Multiple bug fixes & QoL improvements
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fx v0.0.11
Local models. Custom themes. Faster sessions. libfx improvements.
• Connect local models and OpenAI-compatible gateways
• Load custom TUI themes from theme.json
• Resume, file lookup & request handling up to 100× faster
• Long tool-heavy turns use 17× less memory
• libfx adds steering, images, web search & model controls
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New Grok 4.7 landed on try it out for the week 40% off via Vercel AI Gateway.
🚀@vercel's’ fx is a tiny open-source coding agent built to take action directly in a developer’s workspace. This demo extends that idea by giving fx access to the security policies, requirements, and release docs stored in Box.
Using the Box CLI, fx retrieves an approved policy, compares it with local code, edits the files, adds missing test coverage, and prepares release evidence without being told which lines to change. It asks for human approval before uploading anything, then verifies every file after it lands in Box.
Git stays where the code lives. Box stays where the approved docs and release proof live. fx connects the work across both.
Demo below ↓
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New experiment: json-render + jev
The future Generative UI is instant
Your components, your actions, your design system
Rendered in milliseconds
Jev Generative UI has been achieved externally
It's likely that more software will be produced next year than in all of the history of computing. It took Vercel 10 years to get to 1 billion deployments, but then we added another 1.4 billion in the last 10 months alone.
Some of this will be tiny, personal and even disposable software. An HTML file with some javascript ("artifacts"), a report, a pricing calculator, a slide deck, all the way to sophisticated apps, agents and platforms.
Deployment speed is one of our obsessions. We've brought down the time to deploy, upload, assign a domain and globally propagate an artifact to 1 second.
This is quite a feat considering we serve these artifacts with uncompromising performance and security. This sub-second deployments include our global CDN, Firewall, immutable deployments, domain assignment, observability, rollbacks…
And we're not done yet. Follow @melkeydev for more.
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We benchmarked fx auto mode (safety) classifier with @typesafeai's Jev.
tl;dr: ~5-18x faster and more accurate than 𝚐𝚙𝚝-𝟻.𝟼-𝚕𝚞𝚗𝚊, our current top choice
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thank you @Apple
Safari 27 supports JSPI, a magic WebAssembly capability for sync native code to suspend on an async 𝙿𝚛𝚘𝚖𝚒𝚜𝚎.
On libfx uses the built-in browser 𝚏𝚎𝚝𝚌𝚑 stack to make API calls.
As more code goes native, I expect WebAssembly to play a huge role in the future of the web.
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fx v0.0.10
Faster turn handling. Faster request starts.
• Turn processing up to 1.6× faster in longer sessions
• Model requests start up to 2.5× faster
• Better recovery from shell failures
• More reliable session resume & scrollback
• Cleaner rendering across terminal widths
• Stronger secret protection for MCP errors
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This.
You don't get it, I build software to relax
