Cartesi

We are once again asking you to keep the world computer vision alive with us and to build on Linux, onchain, on Ethereum.

August is wrapping up, but the shipping isn't. GM!

Repost: https://x.com/cartesiproject/status/2058896948762128472

Another week of heads-down building brings us to your Cartesi Weekly, and this one is a little more celebratory 🐧

Linux turned 35 this week, and we couldn't let it pass quietly. We wished a happy birthday to the OS that the Cartesi Machine runs on, and the feed delivered as well. Linus Torvalds launched Linux in 1991 and described it as ‘just a hobby’, but luckily the world disagreed. So many corners of the ecosystem showed up to celebrate, proud to be part of the Linux family:
→ https://x.com/cartesiproject/status/2092292063718973745

On Throwback Thursday: Linux has 35-plus years of battle-tested software behind it, yet DeFi keeps rebuilding what already exists. Our case for why it's time to stop reinventing the wheel and build on Linux instead is worth reading in full on the quoted thread:
→ https://x.com/cartesiproject/status/2092952840671240369

Big credit to Alchemy this week. Cartesian João Garcia put out a shoutout for the report our team submitted on intermittent eth_estimateGas failures on OP Sepolia, repro harness, A/B/C testing, cross-provider comparisons included. Alchemy traced the issue, fixed it, and confirmed the fix was live.
→ https://x.com/joaopdgarcia/status/2092581129765245399

Uttam from Alchemy called their support best-in-class in the industry, and the full thread is a good read on what great developer support actually looks like. And we love to celebrate good practices:
→ https://x.com/uttam_singhk/status/2092653343990857977

That's the week, for which we set the tone from the beginning: Cartesi's infra is built for devs from the ground up, more tools, more libraries, more programmability, more compute, so builders can put it all to work. Short one, worth a look if you scrolled past it:
→ https://x.com/cartesiproject/status/2091874346537251118

Go wish Linux a happy 35th if you haven't, read the full case for why DeFi needs it, and bring your questions to Discord: discord.gg/cartesi.

See you next week directly with the ecosystem updates blog. Have a great weekend.

Repost: https://x.com/cartesiproject/status/2093323347832807597

Throwback Thursday to 'Why DeFi Needs Linux.' Brought onchain by Cartesi. Secured by Ethereum.

Linux now has 35+ years of software development behind it. Yet DeFi keeps rebuilding what already exists.

It’s time to stop reinventing the wheel and start using Linux. Who's with us?

Repost: https://x.com/cartesiproject/status/2067246406763704757

GM from Cartesi, the infra built for devs, from the ground up, with more tools and libraries, more programmability and expressivity, more compute.

Now let's build and put it all to work.

Repost: https://x.com/cartesiproject/status/2091874346537251118

Cartesi Weekly is here, and this week went by fast but was no less eventful 🐧

We got to unpack Cartesi Machine Emulator v0.21.0. The verification game docs got a full rewrite, the CLI can now run entire fraud proof procedures on its own, and the state layer is faster and more durable under the hood. Kudos to Eduardo Bart for shipping it, and if you want to explore in depth, check out the thread we shared:
→ https://x.com/cartesiproject/status/2089698617829597516

And that's not all: Cartesi Rollups Contracts 3.0.0-alpha.9 is out as well. This release includes a fix for the Cartesi Rollups PRT Contracts, improved contract imports, dependency updates, and more reproducible release artifacts. Props to Guilherme Dantas for the work on this! Find the GitHub release here:
→ https://github.com/cartesi/rollups-contracts/releases/tag/v3.0.0-alpha.9

House of Chimera wrote up a deep dive for Cartesi this week, with a Cartesi Machine capabilities showcase, plus DeFi explorations and unique prototypes, a clear walkthrough of how PRT narrows a dispute down to a single RISC-V instruction, honeypot lifecycle and more. Good one to send to anyone to get a glimpse of our tech specs:
→ https://x.com/HouseofChimera/status/2090096426315575745

Also making the rounds: Bhavya on why Linux is beautiful, and if we may add, building with it onchain is even more beautiful. Shoutout for the video:
→ https://x.com/Bhavyaztwt/status/2089733481966559455

Our TikTok is also getting more populated. Check out this throwback, a snippet from Diego Nehab, the creator of Cartesi Machine. And don't be shy about following to help grow the channel:
→ https://www.tiktok.com/@cartesiproject/video/7675021194436955406

We keep building, while our motto from earlier in the week still stands: DeFi is the floor, not the ceiling.
→ https://x.com/cartesiproject/status/2087161705415811160

That's the week. Dig into what's new and bring your questions to Discord: discord.gg/cartesi. Have a great weekend!

Repost: https://x.com/cartesiproject/status/2090786513579913225

Linux is beautiful.
From sleek custom environments to massive computational power, Cartesi brings this full Linux runtime directly onchain for Web3 developers.

Props to Bhavya for the video.

Repost: https://x.com/cartesiproject/status/2090060465745674403

gm.
DeFi is the floor, not the ceiling.
We keep building.

Repost: https://x.com/cartesiproject/status/2089335971733246404

Somewhere on Reddit, someone is arguing about rollup architecture at 2am.
They don’t have to do it alone.
Find Cartesi on Reddit at r/cartesi for tech deep dives, release breakdowns, Q&As, and everything happening across the ecosystem.
And if you spot a conversation we should be part of, tag u/cartesi.

Last week brought us Cartesi Rollups Contracts 3.0.0-alpha.7. Safer deposits, stricter claims, and a lighter toolchain.
Let’s dive into what’s new under the hood in this latest release and why it matters. 🧵↓

1/ Deposit refunds are here. If an app is foreclosed, eligible deposits that haven’t been finalized can now be returned to the sender. This now covers ETH, ERC-20, ERC-721 and ERC-1155 deposits. One less way to lose money by accident.

2/ Deposit finalization is now tracked more explicitly, while fee-on-transfer ERC-20s are rejected. Together, these changes improve accounting around deposits and refunds, helping prevent mismatches that could leave apps underfunded or insolvent.

3/ Claim submissions now run through extra machine checks. That tightens security around the exact step where correctness matters most, catching invalid claims earlier instead of later.

4/ The toolchain just got lighter. We sunset Cannon in alpha.5, and now we've sunset the cartesi/rollups npm package too. rollups-contracts depends on Foundry and POSIX utilities only. Fewer dependencies for integrators to manage, less to break.

5/ Compiled artifacts and deployment addresses are still published on GitHub releases, so you can still grab everything easily. Source still ships through Soldeer: forge soldeer install 'cartesi-rollups-contracts~3.0.0-alpha.7'

6/ Also in this release: type-checked deployment scripts (catch deploy bugs before they hit chain), a smaller curated set of published artifacts (less clutter to sift through), foreclosure now emitted as a single event (easier to track onchain), and a bump to Foundry 1.5.1.

7/ Full changelog: https://github.com/cartesi/rollups-contracts/releases/tag/v3.0.0-alpha.7

So devs, dive into the release on the Rollups channel on Discord, test the changes, and drop any feedback: https://discord.gg/cartesi

Repost: https://x.com/cartesiproject/status/2087161705415811160

Ethereum keeps it secure. Fraud proofs keep it verifiable. Cartesi keeps it possible.

Monday, let's build the part that used to be impossible. GM!

Repost: https://x.com/cartesiproject/status/2086799493459230844

It's a wrap on July, and Cartesi kept building in the open.

The fraud proof system picked up a safety upgrade with PRT claim staging, dev tooling got reorganized, media appearances continued, and our penguin ventured from Kuala Lumpur to ETH birthday.

→ https://cartesi.io/blog/ecosystem-updates-july-2026

Repost: https://x.com/cartesiproject/status/2085711559528157397

What's a DeFi idea you scrapped since it needed real compute, not just more gas?

Complex risk models, ML-driven strategies, oracle-heavy logic: the EVM makes them expensive or nearly impossible. A Linux runtime doesn't.

Tell us what you scrapped. We might already be running it.

Repost: https://x.com/cartesiproject/status/2084988310288826861

Why should Web3 be any different?

GM!

Props to ItsFOSS for the inspo.

Repost: https://x.com/cartesiproject/status/2084263311965872287

Friday again, and this takes us to another Cartesi Weekly for you to catch up on what happened across the ecosystem this week 🐧

A full Linux environment runs inside a Cartesi rollup, which means code isn't squeezed to fit a constrained execution environment. That's the whole unlock, and that's how we started the week:
→ https://x.com/cartesiproject/status/2081726068197867826

Developer advocate Shaheen Ahmed joined Dar Blockchain's X Space to talk through Cartesi's role in DeFi, including why building with mainstream legacy software onchain expands what's possible while making the infrastructure even more secure. Listen to the recording if you missed it:
→ https://x.com/cartesiproject/status/2082483594606329892

Youssef Seghaier put together a solid recap thread if you want a quick scoop:
→ https://x.com/YoussefS721/status/2083010835639578883

Cartesi was on the ground at Malaysia Blockchain Week in Kuala Lumpur this week, walking the venue and talking Linux-powered rollups (or massage lore from previous hackathons) with anyone who stopped by. Web3 in Southeast Asia is clearly still building, and the energy in the room backed that up. See what contributor Cynthia Gliga shared:
→ https://x.com/CryptoCyn/status/2082349659771818269

Ethereum turned 11 this week, and Cartesi marked it in the way it knows best: the penguin walking energetically through the Infinite Garden, bringing more compute power and more design space to Ethereum's security and decentralization:
→ https://x.com/cartesiproject/status/2082813992771416195

To celebrate together with everyone else in the ecosystem, we minted CTSI onto EthLabs' collaborative onchain canvas, an 11x11, 11-color grid that grew square by square as the community drew through each other's links. See it here:
→ https://x.com/cartesiproject/status/2083105082774839536

You can still participate yourself too, let's see what you create:
→ https://x.com/ethlabs_org/status/2082835818130063360

That is all for this week. Now let's all have a good weekend.

Repost: https://x.com/cartesiproject/status/2083175617001042048

Want to learn why complex DeFi applications keep suffering from exploits onchain?

Our developer advocate Shaheen Ahmed is joining Dar Blockchain for a live X Space session tomorrow, July 29th at 4 PM UTC+1.

Tune in to learn about Cartesi's role in DeFi, what it brings to the table, and why building with mainstream legacy software onchain expands the design space while also strengthening security.

Repost: https://x.com/cartesiproject/status/2082087681711120392

GM from Cartesi, where actual Linux runs inside a rollup, bringing full programming languages, battle-tested libraries, and no more EVM limitations. Complex logic, verifiable on Ethereum.

That's the unlock. Now let's build.

Repost: https://x.com/cartesiproject/status/2081726068197867826

With free software, you have freedom.

With Cartesi, you have the freedom to build onchain using the programming languages and software stack of your choice.

Props to ItsFOSS for the inspo.

Repost: https://x.com/cartesiproject/status/2079913353930252761

Throwback Thursday.

Some ideas stand the test of time. In a 2020 video, we made the case for bringing Ethereum's guarantees to real-world computation. The mission still holds.

Rewatch for old times' sake:
→ https://youtu.be/tYBfDe-14hE?si=08NsUCFV4NGkMsUV

Repost: https://x.com/cartesiproject/status/2077733239003996242

GM.
New week, same mission: ship the DeFi infra the EVM can't. Let's get into it 🙌

Repost: https://x.com/cartesiproject/status/2076652643238502667

Shoutout to Joeri Billast for having Dev Advocacy Lead Joao Garcia on the Web3 CMO Stories show.

Tune in to hear how giving builders the legacy Linux tooling the world already trusts can completely reframe DeFi infrastructure instead of forcing developers to reinvent everything onchain. 🐧

Watch the full episode below:
→ https://www.youtube.com/watch?v=slts4Q9fqKo

Repost: https://x.com/cartesiproject/status/2075203611072831589