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affine-types

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Five approaches to building a programming language with every known level of type safety (10 levels, from basic types to homotopy types). An exploration mapping the territory of type safety via five concurrent routes (extend, dyadic, aspect, aggregate, clean-slate) sharing a common test suite and documenting all failures in a stumble journal.

  • Updated Oct 1, 2026
  • Just

Resource-safe, effect-typed programs in syntax you already know. A checked affine core with familiar Faces — JavaScript-, Python-, functional-, and pseudocode-shaped surfaces — compiling to typed WebAssembly.

  • Updated Oct 17, 2026
  • OCaml

Research language whose affine/QTT core is proved sound twice — Coq and Idris2, axiom-free and CI-gated — with the verified usage-checker ported into the Rust compiler. Nested Solo ⊂ Duet ⊂ Ensemble dialects, session-typed concurrency, echo types for loss that isn't erasure. Early alpha.

  • Updated Oct 19, 2026
  • Rust

Reusable AffineScript libraries (design stage): a KYAML (Kubernetes YAML) lexer/AST/parser draft, with jq-style query DSLs, Kubernetes lint rules, data structures and FFI bindings planned. Intended core of kcq.

  • Updated Oct 19, 2026
  • Nickel

A functional language with algebraic effects, a type-and-effect system, refinement types, information-flow security, and cooperative concurrency — single-file reference interpreter.

  • Updated Sep 6, 2026
  • Python

Types, Proofs and Ownership: a free book on type theory, logic and category theory through Rust and Lean 4. Every idea in math, Rust and machine-checked Lean proofs, building to: are Rust's ownership and lifetimes really affine types?

  • Updated Oct 11, 2026
  • Rust

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