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Jun 2025 (v0.6.0)

Mochi v0.6.0 introduces dataset queries for filtering, joining and grouping lists. Programs can now build analysis pipelines using SQL-like syntax. The release also ships a WebAssembly compiler, notebook integration and new set operations for lists.

Dataset Queries​

let result = from o in orders
             join from c in customers on o.customerId == c.id
             where o.total > 100
             group by c.name into g
             select { name: g.key, total: sum(from r in g select r.total) }

WebAssembly Compiler​

The wasm compiler emits WebAssembly binaries using the Go toolchain or TinyGo so Mochi programs run in the browser.

List Set Operations​

Lists support union, union all, except and intersect operators for combining results.

Other Changes​

  • %%mochi Jupyter cell magic
  • Vector search runtime with a flat index
  • Dataset query support across Go, Python and TypeScript compilers