Building the future @ Blacksmith. Prev @CloudflareDev // https://xitter.cf/t.co/kNlKHcxDHd
United States
Joined December 2012
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I got an email that a GitHub issue I filed on a repo has been fixed. I have no memory of said issue.
Idk how I feel about this
Jacob Hands retweeted
Huge. Blacksmith has helped us reduce the CI time in MSW by x10 times (yes, you read that right). Went from 10m to 1m. An absolutely silly-easy thing to recommend.
@sequoia is leading our Series C at a $1B valuation.
We started Blacksmith in 2024 to make CI faster and less painful. In January we ran 5 million CI jobs a week. Today it's over 90 million and growing, and we’re still early.
ALT Line chart of weekly CI jobs run on Blacksmith, growing from 5.4M in January to 90.5M in October 2026.
It's so fun building the future of code validation, and we're just getting started!
@sequoia is leading our Series C at a $1B valuation.
We started Blacksmith in 2024 to make CI faster and less painful. In January we ran 5 million CI jobs a week. Today it's over 90 million and growing, and we’re still early.
ALT Line chart of weekly CI jobs run on Blacksmith, growing from 5.4M in January to 90.5M in October 2026.
I posted 2 issues to the Effect repo and they were fixed 2 hours later 🤯
github.com/Effect-TS/effect/…
github.com/Effect-TS/effect/…
open source as we knew it may be gone, but it's so motivating to post issues when they get fixed so fast.
I always hated the way the code looked, but I think Effect might actually be the path forward for agent-driven typescript.
If you can’t beat ‘em, join ‘em!
We are excited to announce that Deno is joining Cloudflare!
deno.com/blog/cloudflare
Faster Go builds, so your agents can iterate even faster ⚡
Alchemy is one of my favorite projects - the way they test against real infra in CI is so cool
We were fortunate enough to have our CI accelerated and sponsored by @useblacksmith
Simply swapping to blacksmith accelerated build times by nearly 2x. We then layered on more improvements.
@blankparticle wrote about it here:
alchemy.run/blog/2026-09-24-…
Realized this week I can just fix every bug, layout shift, and nit I come across. Forget the backlog, just fire off an agent to fix it, get a Proof, and ship it.
Whoaaaaa
Introducing Cloudflare Traces
Today we're launching Cloudflare Traces, a way for you to get an unprecedented view into requests going through Cloudflare!
Why was a request blocked?
Why did a request fail?
Why was a request slow?
Find out with Traces!
blog.cloudflare.com/cloudfla…
Jacob Hands retweeted
Last day in the office where @useblacksmith grew up. It saw a lot of highs and some lows over the past year. Next week, we move somewhere with room to match our ambitions. You're all invited once the coffee machine is working.
We're building Proof because we're shipping fast and need to keep quality high - a core value at @useblacksmith and one of my favorite things about working here.
I shipped 35 PRs to [code]smith yesterday and used Proof to validate every change. Saves so much time.
Creativity is still alive - makes me happy
Before it became an anvil head, [code]smith almost ended up as a hammer with eyes, a literal blacksmith, or a clanker robot.
We tried them all.
Here’s the story behind how we designed the character, brought it to life, and made room for some fun personality in a product that takes performance really seriously.
Read more here: blacksmith.sh/blog/does-a-co…
We really just want your CI to be fast!!
Container caching is now on by default for every Blacksmith org. And it’s free.
Every Docker-based CI job pulls the same images over and over: Postgres, Redis, Compose stacks, base images.
On Blacksmith, those pulls disappear. We persist each org’s Docker image store on a sticky disk, so the images are already local when the next runner starts.
No config. No cache keys. No workflow changes.
Across six real CI jobs, this made them 25–89% faster end to end.
More details in the blog soon.
ALT Line chart of six CI jobs showing total job duration dropping 25% to 89% after container caching was enabled.
