Product Development Is Being Rewritten: Coding Agents Shift the Bottleneck from Code to Runtime Signals
As coding agents improve exponentially, the bottleneck in software development shifts from writing code to verifying behavior. The traditional sequential loop—Idea, Product, Design, Engineering, QA, Production—is compressing into a new empirical cycle: Intent, Implementation, Observed Result. This change collapses the roles of product, design, and engineering into one, with the repository no longer capturing the full story of a change. Instead, runtime signals—how the app behaves on device, performance, user journeys—become the critical record. Revyl is building tools to capture this behavioral evidence, predicting that pull requests will soon include runtime proof as standard.
If an agent changes a checkout flow, the repository can tell us which files changed. It cannot tell us whether the keyboard covered the payment button, whether returning users were sent down the wrong path, whether latency increased, or whether the resulting experience still matched the original intent.
- stuartaxelowen
Agree on the changing work interface layer going higher to product capabilities, but not on “the code base is no longer important”. It’s easy to dismiss given how easy it is to ask an agent to generate a bunch of code. But the code base encodes the intersection of the orgs learnings and its arc of product growth as well. Good code bases encode the learnings as checks and abstractions that form the foundation for future growth. It would be a mistake to give up this formal language. Personally, I would bet on better abstractions in code bases, and being able to embed your product description in code, for high leverage and verifiability.
- hypfer
There is no shortage of articles on the HN front page, stating that being "just a code monkey" is likely going to have much less employment options soon-ish.
A likely correct but also at this point rather stale observation.
- bcrosby95
This post seems very concerned about what a product does - and rightly so. However, it doesn't really talk about figuring out what a product doesn't do. This is a blind spot large enough to fly a 747 full of CVEs through.