Forestwalk: A Series
Growing a startup.
How To (Not) Spend $10k/wk on Coding Agents
On too much of a good thing.
Link: Surprise! Pay $1000
My turn writing for the Forestwalk blog:
Now typically, when you try a SaaS product for free without a credit card, and you hit the limit, you get cut off. Also known as “disruption to your service”. Instead, we were invoiced $1000, which was immediately overdue.
Genuinely curious how common this practice is. Just because I was surprised by it, doesn’t mean it’s unheard of.
Link: Test Coverage Won’t Save You
Forestwalk’s CTO Jenn Cooper shares what she’s been learning about tests, after a couple years of increasingly coding with agents:
Most discussions about AI-native development jump from this problem – agents’ tendency to accumulate tech debt – directly to tests. … Tests verify that code does what it did before.
Whether what it did was even the right way to do it is a separate question.
She argues that while agents make it easy to have rigorous traditional test coverage, at best unit tests maintain local code cohesion. At worst, they can actually make it harder to improve what agents are worst at: the wider coherence of the entire codebase.
So far I’ve been impressed with how effective the broader automated checks she describes can be to guard against agentic nonsense.
Launch Now
On trading comfort for speed.
Building Something Big
On the pros and cons of the indie path.
Testing the Untestable
The four phases of automated evals for LLM-powered features.
Starting Forestwalk
A wild startup appears.