Built on Grit. Powered by Logic.
The story of 17 days, and a mission to end the Black Box era.
The Story Behind Lár
Lár wasn't built in a sleek Silicon Valley incubator. It was forged between Dublin and India, in the quiet hours between our full-time commitments.
I was balancing retail shifts and a Master’s at DCU in Ireland, writing the core engine. In India, my partner was crafting the product vision and design while working full-time. Lár was built in the "afterhours"—late-night calls, weekend sprints, and stolen moments. We didn't have funding. We didn't have a team.
We were developing complex agents in LangChain and hit a wall. The debugging loops were exhausting, and we felt existing observability tools like LangSmith were paid, opaque and restrictive. We realized that complexity is the enemy.
That necessity gave birth to Lár. We decided to build the framework from scratch. We bought the domain on November 11th. By November 18th, we had crossed the finish line. I authored the core framework in a relentless one-week sprint, while Vinay designed the product identity. Together, we built a deterministic engine significantly faster than the industry standard.
We aim to make Lár the industry standard for auditable agents.
Execution Velocity
A Technical Note
"Is this just a wrapper?" No. Most platforms wrap APIs and call it an 'agent'. Lár is a deterministic engine built from scratch. It uses LiteLLM for universal model support (100+ providers), but the execution graph is pure, debuggable Python designed for total state observability.
Build the Future of Agents.
Lár is now 100% Open Source.
The Glass Box is built by the community, for the community.