Grep open-sources key parts of its agent harness, cutting agent costs with a workflow DSL
garrytan · x · 2026-10-24
Y Combinator CEO Garry Tan highlighted Grep's move to open-source big parts of its agent harness, calling it "a big deal."
- Day 4 of the open-sourcing series brings major improvements to their workflow DSL
- The DSL powers a self-improving loop that turns agentic loops into more deterministic recipes
- With type-safe routing, classification, and workflow composition, agent costs dropped significantly without sacrificing performance
- The learning loop was meant to be open-sourced too, but removing business logic from the codebase still needs work
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