Rebuilding a $179/month feature in 3 hours with REA tracing and DeepSeek V4.1 Flash
A 19-year-old developer used screen-recording tool REA to trace cursor tracking and auto-zoom behavior, then had DeepSeek V4.1 Flash rebuild and test the code, producing a working prototype in three hours.
it's becoming f*cking dangerous. A 19-year-old dev from Shenzhen just spent 3 hours rebuilding the feature he was paying $179/month to use. He didn't have the source code. He didn't even know how the original was built. At 10 PM, he opened a screen-recording app and pointed REA at it. Then dev connected DeepSeek V4.1-Flash. Here's the insane part: REA traced how the app tracked cursor movements and triggered automatic zooms DeepSeek rebuilt the behavior in a separate codebase A testing loop compared both versions using the same inputs Failed tests went straight back to the model for another pass By 1 AM, he had a working prototype with cursor tracking, automatic zooms, and video export. Not a finished competitor. But the exact feature he'd been paying for. Think about how weird that is. A company spends months figuring out which features people want. A kid sees the finished product, uses AI to understand how one feature behaves, and builds his own version before going to bed. The workflow is worth keeping: REA → trace behavior → DeepSeek → rebuild → test → repeat. And somewhere right now, a developer is still waiting until they're "good enough" to start building.
This post quotes another post: x.com/argona0x/status/2111152998344757333