automating testing @getlark (YC S25). prev @stripe. climb with me calendly.com/founders-uselar…
Joined August 2025
- Tweets 68
- Following 33
- Followers 68
- Likes 85
15 Photos and videos
Jun 3
Hands down best way to handle agentic memory
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May 30
Am I the only one who thinks Claude Opus 4.8 hasn't really improved over 4.7 wrt coding tasks?
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May 13
Nationalize utility companies
May 13
Nearly 50,000 people in the Lake Tahoe area have been told that their utility will stop providing power to them, because it's redirecting that power to data centers.
NV Energy, the Nevada utility that has supplied most of Lake Tahoe’s electricity for decades, says that next year it will stop servicing homes in the area, and instead direct that electricity to the growing demand from Nevada data centers.
Northern Nevada is one of the fastest-growing data-center corridors in the country.
fortune.com/2026/05/12/lake-…
Community note
NV Energy is ending a wholesale supply contract with Liberty Utilities (the actual retail provider) in May 2027. Liberty is actively seeking replacement power sources and has stated, 'This does not mean the power is shutting off.' sfgate.com/tahoe/article/… calmatters.org/economy/2026/0…
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E2E tests shouldn’t break every time your UI evolves.
Today, one of Lark’s own E2E tests failed after we shipped a UI change. Lark summarized the failure, identified it as a test issue rather than an app bug, and repaired the test automatically.
The test has been passing consistently since.
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Apr 28
AI solving a 60-year-old math problem is impressive. what's more impressive is that most teams can't get their AI to reliably fill out a form. the gap between research demos and production workflows is still enormous.
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Apr 28
the test suite that takes 45 minutes to run is the one nobody fixes broken tests in. speed is a feature, and in CI it's the only feature that affects whether engineers actually trust the output.
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Jack Brown retweeted
Apr 22
Over 100 QA reports generated since launch.
We’re seeing real issues uncovered across SDKs, APIs, and dashboards—helping teams catch and fix problems before users report them.
Fast, structured, reproducible.
Apr 2
We just shipped QA Reports.
Deploy AI agents to test your product, uncover issues, and get back a structured report with reproducible test cases.
We ran it on the Vercel Sandboxes API. It mapped test areas, executed flows, and surfaced real issues in minutes.
Try it: getlark.ai
Example report (Vercel Sandboxes API): tests.getlark.ai/a/kiwi/qa-r…
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Jack Brown retweeted
Apr 15
OpenAI just added support for popular sandbox providers in their Agents SDK — using a “harness separate from compute” model.
At @getlark, we take a different approach: “harness in compute.”
We want agents to behave more like local Claude or Codex — fully embedded, with everything running inside the compute environment.
That’s why we open-sourced runtimeuse.com — an agent-agnostic framework for running long-lived agents in any sandbox.
Works with @e2b, @daytonaio, @vercel, @modal, and more.
Apr 15
Build long-running agents with more control over agent execution.
New capabilities in the Agents SDK:
• Run agents in controlled sandboxes
• Inspect and customize the open-source harness
• Control when memories are created and where they’re stored
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Jack Brown retweeted
Apr 2
We just shipped QA Reports.
Deploy AI agents to test your product, uncover issues, and get back a structured report with reproducible test cases.
We ran it on the Vercel Sandboxes API. It mapped test areas, executed flows, and surfaced real issues in minutes.
Try it: getlark.ai
Example report (Vercel Sandboxes API): tests.getlark.ai/a/kiwi/qa-r…
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Mar 31
The leaked claude code src has a real comment about optimizing launch timing for "sustained Twitter buzz" while being "gentler on soul-gen load"
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Mar 24
We just launched Repairs at Lark.
Ship a UI change. End-to-end tests break. Lark's QA agents automatically fix them.
No more test maintenance bottlenecks. Just turn on auto-repairs and keep shipping.
Try it → getlark.ai
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Jack Brown retweeted
Mar 23
fuck this administration
it does not matter your feelings on immigration at all, this is not how our legal system is intended to work
ICE detain mother at airport—traveling with young daughter.
First reported kidnapping at airport since Trump ordered ICE agents to report—refuse to show ID.
"I don't know who you are!" witness yells.
"You could be someone kidnapping her!"
Agent continue to refuse to show ID until bystanders agree they should call police to report a kidnapping.
Incident occurred at the San Francisco International Airport Gate E2 on March 22, 2026, at 10pm. #DemsUnited
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Jack Brown retweeted
Mar 19
Jimmy Carter had to sell his peanut farm...
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