Hayley in the Stack (@hayleywitherell) header
Hayley in the Stack (@hayleywitherell) profile picture

Full-Stack Software Engineer | Dev at @FCPEuro | Founder of @nditcommunity | Volunteer at @codethedream | Alum of @turingschool | 👩‍💻

Denver, CO
Joined March 2010
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Hayley in the Stack retweeted
learn to market is the new learn to code
i think we've reached the point where the cracked marketer is more in demand than the cracked engineer
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Hayley in the Stack retweeted
Asked which AI models people use for security work. 100+ replies. what came out of it: Glm came up way more than i expected. Deepseek right behind it. Claude for review, gpt for triage was a common split. Almost nobody uses one model. most stack them: frontier for strategy and review, local or open models for the heavy lifting, another one as the fallback “on the off chance it refuses.” guardrails were the biggest complaint by far. a lot of people run abliterated or “uncensored” models for offsec for that reason. Half a dozen replies were companies offering hosted, unrestricted models. if it’s not running on your own hardware, ask what gets retained, for how long, and who can read it, so you don't send your recon, your targets, your client’s infrastructure and your exploit attempts to a third-party server you know nothing about. Better still for sensitive tasks just go Local.
Cybersecurity people, what models are we using for cyber tasks these days? GPT, Claude, Gemini, DeepSeek or local models? Curious which ones using and are actually worth it m for technical security work?
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Hayley in the Stack retweeted
i went to bed and asked claude to paint an autumn tree overnight. at around 4am, it realised that it didn't have some shades -- so it stopped and titrated its own paint: diluting red, sienna and madder step by step on a second palette, then measuring each pocket from a photo. woke up to this beautiful watercolor painting. 303 brush marks, took about 4.5 hours 🍂 (still working on the speed)
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My cousin @RepNataliePrice just won Michigan's State Senate District 10 seat! 🙌 I'm so proud of her and the work she's done representing her community in the Michigan House, and I'm excited to see her continue that work in the Senate. theroyaloakrecord.com/articl…
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As a @PawsCoTeam foster, I'm proud to announce that I've completed Cat Body Language 101. Looking forward to applying these skills in stakeholder communications.
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Hayley in the Stack retweeted
In 2026, "I built an app" is starting to sound a lot like "I made a PowerPoint."
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Hayley in the Stack retweeted
I’m starting to think there might be more to cybersecurity than just vulnerabilities??
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Hayley in the Stack retweeted
I don't own enough cyber security stocks.
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Hayley in the Stack retweeted
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Hayley in the Stack retweeted
Calling it now. AI is going to usher in a whole new era of software development. I’m calling it Software as a Service. People will want to use these tools but they’ll realize they don’t want to spend the time to maintain and update them over time. This will create a whole new category of businesses and entrepreneurs that can take on that task for businesses that would rather work on their core products. AI is changing everything. This is a whole new paradigm of thinking about the way we interact with software.
i have no time to maintain all my vibe coded tools we need a business model where someone else maintains the code and i just pay a monthly fee
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Hayley in the Stack retweeted
Thanks October, I’m aware enough of cybersecurity now 🥹
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Hayley in the Stack retweeted
a haunted house but every room has a project manager asking for a status update
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Hayley in the Stack retweeted
Everything that can be hacked, will be hacked.
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Hayley in the Stack retweeted
LIST OF EXCHANGES HACKED TODAY - BINANCE - $3.5 BILLION - BYBIT - $1 BILLION - BITGET - $1 BILLION - SWYFTX - $10 MILLION - KuCoin - N/A
Today will go down in history as the crypto hack Super Bowl.
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Hayley in the Stack retweeted
heard in Silicon Valley: Security researchers will soon make more than AI researchers.
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Hayley in the Stack retweeted
Claude, hack Binance Make no mistakes.
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Hayley in the Stack retweeted
JUST IN: Binance says $3,000,000,000 worth of stolen crypto has now been frozen following major hack.
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Hayley in the Stack retweeted
This is not just a crypto hack. It's a warning for the entire web. Banks, governments, hospitals, payment apps.. We've just witnessed firsthand that all of it runs on code that can be exploited. Security is about to become the most important industry in the world.
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Hayley in the Stack retweeted
I spent 48 hours in SF hanging out with billionaires, data labs and AI founders and execs running $1B to $100B companies. My observations: 1. Sooo MANY stories of data brokers making like $2M a WEEK selling company data to labs. I can't tell if it's the beginning or a bubble, and I kept wondering which niches are left. Digging into it actively. 2. At dinner, someone asked the table, "If a new model drops next month, does your company get better or worse?" HALF the table went quiet! I think that's the best question to ask about any AI startup right now. 3. The bar people talk about now is hitting $1B in revenue in 12 months (I guess that's the new unicorn?). What I didn't hear much about is retention. AI revenue can come in fast and leave fast, and I think we're going to see a lot of stories of AI companies with huge revenue and terrible retention. 4. It's pretty clear we're living through the reinvention of the computer. The model is the CPU, the harness is the operating system, and skills and plugins are the apps. Thinking about it that way makes it easier to see where the whitespace is. 5. We're maybe 12 months from an agent that can watch you work for a week and then do your job without any instructions. The screen recording plus agent memory plus local model combination makes this possible right now. 6. Agent harnesses feel like the new GPT wrappers, in a good way, especially vertical ones. The best teams I talked to treat the model as swappable. One founder walked me through routing different models to different jobs: one for taste and visuals, a cheaper one for the everyday stuff, another for text. They use prompts they can move across models over fine-tuning, and A/B test the output on what users actually do with it: do they edit it, export it, share it? A vertical harness is basically four things: the connectors for that industry's data, evals written by people who know the work, rules for what the agent can and can't touch, and a clean screen for a human to review. The model is maybe 20% of it. 7. There's a lot of reverse engineering going on/cloning going on more than I've ever seen. People are decompiling software and rebuilding it with agents, and someone showed a suite of like 10 apps that are worth $5B+ each all that he cloned open source. Me and everyone are still thinking through what it means when software gets this easy to copy. 8. My guess is the value moves to data. If the software can be rebuilt quickly, what's worth paying for in a legacy SaaS company is the years of customer data and workflows inside it. Some SaaS companies are secretly data companies. Gets me thinking about how do you truly value data for this saas companies? Like if we were buying these dying saas companies at 2x ARR before (as example), maybe there is a better metric. Idk, just thinking out loud here. 9. It feels like a good chunk of legacy software won't make it to the agentic era, especially anything built around people clicking through a lot of screens. 10. Every company I talked to wants to pipe its internal data into one place and expose it to agents through MCP. Then they look at the data and realize it's a mess: five versions of the same customer, old Slack channels, PDFs nobody can search. Cleaning that up feels like a big consulting opportunity! 11. A lot of founders are building the basic building blocks for agents: APIs, data layers and tools. Some of the companies I saw barely have a UI because the main user is an agent. I really believe the startups that build primitives to this agentic era will do extremely well. Building blocks is the best way to think about it. 12. Labs can get plenty of training data, but it's harder to get real examples of agents failing inside companies. Whoever has those logs has something valuable. 13. Someone running a big consumer company told me the next fight is over memory. The model that remembers the most about you wins, and the smartest model matters less than people think. 14. Physical AI came up a lot. Astra I think was the first model that got people into AI can actually do CAD, and I think a lot of people are thinking what does vibe manufacturing really look like. The line I keep thinking about came from a robotics founder: the hardest problems in AI are deployment problems now, not research problems. Their robots work on their own, call a human when they get stuck, and every one of those calls becomes training data. 15. Cybersecurity companies are having a moment and are actually cool companies to build now, especially the ones that clean up after a breach. Every agent with access to your systems is a new door into your company, and a lot of those doors were left open. 16. Some startups are worth more dead than alive now. A shutdown company with 5 years of Slack, email and code can get paid for licensing all of it. I wouldn't be surprised if founders start factoring that into when they shut down. 17. People are starting to talk about monetizing the agent web. It feels really early, but when the most popular user of the internet is an agent, what startups should you be building? 18. I think agent insurance is coming. Once an agent makes an expensive mistake, insurers will want audits before they cover anyone. 19. Several people said the hire they want most is someone with taste who can write evals. The models are getting good at generating ideas, so the hard part is judging which ones are good. 20. New trend I observed: startup raises VC, uses venture dollars to become a creator, startup fails, founder falls back on being a full-time creator and incubates other products bootstrapped. 21. Getting SIGNIFICANT distribution is HARD right now. Founders are sponsoring buses, buying billboards like crazy and throwing parties with famous DJs to get noticed. Kinda feels dotcom era in that sense. Attention is what's scarce! The growth guy going viral sharing his UGC strategy from Wispr Flow is a good example. It's the sauce everyone wants, and I truly believe there are probably only 50 people on the planet who know how to scale these types of businesses efficiently in this era. Always good to get that dose of SF. I felt sooo lucky to have such an incredible trip during such an incredible time in building businesses. Surreal in so many ways. Happy to be home and locked in. Until next time!
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Hayley in the Stack retweeted
Check out ticketysplit.melware.art/ if you want free and encrypted voting support! Does your research, cites sources, shows funding comparison graphs, and helps you plan your ballot. Across the US! 🇺🇸
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