Tessl

Tessl is the AI native development platform pioneering Spec-Driven Development (SDD), shifting focus from writing code to defining reliable software specifications.

Tessl, founded by Guy Podjarny (Snyk creator), redefines software creation with its AI-native platform focused on Spec-Driven Development (SDD). This approach moves beyond code-centric methods: developers define the *what* (specifications) and the AI handles the *how* (implementation). Key products include the Tessl Framework, which guides agents to build with auditable plans, and the Tessl Spec Registry, which provides over 10,000 structured 'tiles' of reusable context for open-source libraries, preventing AI hallucinations. This system ensures agents deliver reliable, maintainable code, transforming developer roles toward architecture and product focus.

https://tessl.io