Penling
Spec-driven-development for product teams
Penling launched on June 17, 2026 with 4 votes, #3,322 of 22,647 launches that month and more than 75% of that year's launches.
What it does
Spec-driven development has the right idea and the wrong timing. Every tool out there - Spec Kit, Kiro, the rest - puts spec-writing in front of one engineer, at the keyboard, right as they're about to build. Penling flips this approach and uses generative AI from the start of your project all the way through the lifecycle to a reviewable PR containing tested work and a fully documented build specification that your whole team agreed on.
Penling is the agentic spec-driven workflow where teams write the spec before the code. Structured goals, shared context, and a build process the whole team can follow — from brief to merged PR.
AI is changing how code gets written. We think it should also change how teams agree on what to build. Penling brings specs out of the CLI and into a shared workspace where designers, PMs, leads, and engineers shape the work before any code gets written, so the reasoning stays attached to what ships. By signing up you agree to the Terms and acknowledge the Privacy Noticefrom penling.app
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