Co-creator @hamilton_os @burr_framework; @#agentforce; DS/ML+Eng. Former: CEO; Stitch Fix Platform, Nextdoor, Linkedin, Stanford MSCS Grad; Grown in WgtnNZ.

Bay Area, CA
Super excited that this talked dropped so quickly for everyone else to see it. If you're struggling with #MLOps or #LLMOps I'm happy to chat and see if we can help.
Want higher return on investment #ROI for #MLOps or #LLMOps initiatives? Check out @stefkrawczyk's talk from @MLOpsWorld on some lessons learned building in the space that just dropped. piped.video/watch?v=GH51aI3k… 1/3
1
7
2,247
With hindsight, we built Apache Burr for people who know what they're doing, which was admittedly small a few years ago. But now, it's exciting to see that as more people know what they're doing, there's more great stuff being built on Burr. E.g. build the #agentharness specifically for your needs with Burr and help with drug discovery :)
Fun fact: @AstraZeneca uses @TheASF Burr for drug discovery. arxiv.org/abs/2608.12395 Why? Well it's a framework that gets out of your way and handles only the things you decide it should handle - build your own harness the exact way you need to. #drugdiscovery #agentharness
1
6
299
Pro-tip: tell your agent to use pbcopy on Mac and you'll get proper white spacing when using agent output...
6
193
Stefan Krawczyk retweeted
In three days, on August 2, the EU's AI Office can start fining companies up to 3 percent of global revenue, or 15 million euros, for AI systems they cannot explain. The obligations can reach back to violations from August of last year. Most CEOs I talk to are reading that as a compliance problem to survive but I think it is really an upstream design question you either answered years ago or didn’t. If every action your software takes traces back to a requirement a person approved and a test that proves it still holds, the deadline becomes paperwork. One of Software Factory’s defining features is its ability to create the governance and auditability not just of entire systems but down to individual features so this is the case.
107
45
673
175,028
Skills are "dead". "Workflows" and open source models are the future.
1
4
221
Burr is still humming along. Great to see some awesome agents being built on top with it.
Happy Friday! Congrats to Adam Rahman for winning Grand prize @splunk Agentic Ops hackathon with his Kassi agent - built on #apacheburr of course! Read more here - devpost.com/software/kassi-s…
1
5
646
#Mexico vs #England game definitely lived up to the hype. #fifaworldcup
2
417
Stefan Krawczyk retweeted
I was born in Germany, I grew up in Spain, I’ve lived in the US for 15 years, and I’ve been a US citizen for about a year. I never really understood patriotism until I became American. Usually, when people move to other countries they are expats. A German in Spain for example. When people move to America they become American. It’s the greatest country on earth and an experiment worth fighting for. Happy 4th of July. 🎆
912
3,401
43,169
753,400
Meanwhile the rest of the country is 🫠, it's a Happy 4th of July #fogworks situation here in #sanfrancisco. That said the fireworks from the bridge were fun though 🎆🌉 .
3
282
What a game from Cape Verde!
73
User spotlight: SRE Agent, Theodosia mounts a Burr Application as an MCP server — AI agents pick transitions through tool calls, illegal moves are refused with structured errors, and the full Burr observability stack comes free. Clean design by @msradam 👏 github.com/msradam/theodosia
1
1
6
129
Thought: terminal based coding agents are evolving into the terminal wars of old. Bash vs zsh vs ksh etc. It'll also be one thing you customize as a dev like you customize your shell - look, feel, behaviors, plugins, etc. LLM model will be configurable. UX will be stickier than model provider.
1
78
For once I actually agree with the constructive argument here. There are more approaches that allow you to own your own destiny. Memory is just context after all and you can provide that at many places of the agent while loop. Check out @burr_framework and of course @agentforce
2
10
2,596
Rookies... #Superbowl ad and you can't keep your site up...
233
Stefan Krawczyk retweeted
This is the best summary of the personal impact of the California Wealth Tax I've seen. Founders, if you have super voting shares, your tax liability may be substantially higher than your net worth. Private company shareholders, especially those in heavy industries, face a similar risk. Note this tax can apply to founders and shareholders with far less than $1B in net worth as well. As a lifetime Californian, this pains me to say, but founders of any unicorn company or any startup that could become a unicorn this year, really need to start planning a potential move or many will face 30-50%+ wealth taxes and potential bankruptcy. I'm still hopeful that voters will see the serious negative impact on California's tax revenue, services and jobs and will vote this proposition down... but it's so egregiously bad that you need a backup plan. taxfoundation.org/research/a…
47
91
668
341,382
Stefan Krawczyk retweeted
California started with the Gold Rush and might end with the Golden Exit. it has been underreported how much wealth has left CA because of the asset seizure tax being proposed. a private poll was conducted amongst affected individuals a few days ago and 80-90% surveyed said they have already left CA in 2025 or will leave in 2026 if the ballot measure looks likely to pass. $2-2.5T of assets gone, representing about $20B of annual revenue for the state government. and likely hundreds of thousands of jobs now at risk. less reported is the bigger exodus underway from folks who are NOT directly affected but worry (as they should) that this law will quickly transition from billionaires to everyone else... the initiative actually gives CA legislators the right to take anyone's post-tax assets anytime in the future based on a majority vote. this isn't about billionaires. it's a new "tax system" that simply destroys private property rights in America. all private property is now public property. even after paying your taxes, it's not legally your property anymore. it's the government's, you're just borrowing it. legislators will decide what you get to keep and temporarily use each year. countless founders, CEOs, and other business leaders are actively looking to move their companies out of state. not just tech, not just AI, not just billionaires, but the core engine of California's prosperity since 1847 is unraveling. and here is how this initiative risks unraveling America: - ~10 states have explicit or implicit prohibitions against an asset seizure tax... - individuals affected in CA (and other states trying to do the same) will move to these states that endow private property rights. - CA already has a $20-30B annual budget deficit, an unfunded ~$1T pension liability for public employees/unions, and $500B of debt outstanding. the state can not afford to borrow much more and will launch more asset seizures to meet its obligations. - asset seizures will first transition to "millionaires" and eventually to the entire middle class as more asset seizures drive more people to leave the state. - the deficit, debt, and job loss will spiral. the Golden Exit. - no US state has ever declared bankruptcy. in addition to CA, dozens of other states face similar fiscal crises - legislators promised future benefits that can't be paid or theft and waste have been allowed to run rampant and unabated for years. - struggling states will eventually request federal government assistance, as they always have in times of fiscal crisis, effectively "federalizing state debt". - states not in crisis will declare "enough is enough", individuals in those states will refuse to pay their federal taxes (why pay for other people's mistakes?), some states may try to secede from the Union, and a constitutional and civil crisis will erupt. this may seem far-fetched but it is the obvious domino effect of selectively deleting private property rights for some people in some states. i am not a billionaire and this CA bill does not affect me, but i care about the country and the state of CA. i want both to thrive. it's obvious that there are people in CA in desperate need of support and assistance, and inequities may exist that need to be rectified, but eliminating private property rights is the wrong path for everyone. a few alternatives to consider first: 1) with a $350B annual budget, CA can cut programs that result in theft and little-to-no benefit for citizens. $50B per year is likely recoverable. 2) if more taxes are needed, tax loans against unrealized capital gains (very few objections will arise), eliminate tax-free rollover of certain appreciated assets (real estate industry will fight), create a step up in basis on inheritance (some will fight but most will support). likely $10Bs of incremental revenue can be realized. 3) restructure all public retirement programs from Defined Benefit to Defined Contribution. eliminating the unfunded retirement liabilities ($1T+) will be the release valve on the future the state so desperately needs. we must address what ails us without dividing and destroying our state, our nation, our home. ignore the rhetoric, these are the facts.
865
1,524
13,977
2,308,454
Stefan Krawczyk retweeted
Larry and Sergey can’t stay in California since the wealth tax as written would confiscate 50% of their Alphabet shares. Each own ~3% of Alphabet's stock, worth about $120 billion each at today's ~$4 trillion market cap. But because their shares have 10x voting power, the SEIU-UHW California billionaire tax would treat them as owning 30% of Alphabet (3% × 10 = 30%). That means each founder's taxable wealth would be $1.2 trillion. A 5% wealth tax on $1.2 trillion = $60 billion tax bill, each. That's 50% of their actual Alphabet holdings—wiped out by a "5%" tax. Section 50303(c)(3)(C) of the 2026 Billionaire Tax Act states: "For any interests that confer voting or other direct control rights, the percentage of the business entity owned by the taxpayer shall be presumed to be not less than the taxpayer's percentage of the overall voting or other direct control rights." This means if a founder holds shares representing only 3% of economic interest but 30% of voting control (through Class B supervoting shares), the tax would presume their ownership stake is at least 30% for valuation purposes, not 3%. The wealth tax is poorly defined and designed to drive tech innovation out of California.
1,171
2,371
17,116
3,432,512
Stefan Krawczyk retweeted
Starting in November, developers can use #AgentScript to build next-gen, hybrid reasoning agents for the #Agentforce360 Platform! The #AgentforceDX team has pro-code devs covered! Check out this special #DF25 preview of pro-code tools for Agent Script!
1
2
190