# zetzit/zz

🍺🐙  ZetZ a zymbolic verifier and tranzpiler to bare metal C

Repository: https://github.com/zetzit/zz
Canonical: https://ross.abutalabs.com/products/zz
Language: Rust
License: MIT
License Family: permissive
Archived: true
Last push: 2022-06-17T01:37:37+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 2631, "days_push": 1539, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1598, forks 56 (observed 2026-08-28T04:05:09.337849+00:00)

## What it is
ZetZ is a C dialect and transpiler that emits plain ANSI C while formally verifying all code via symbolic execution with an SMT prover at compile time. It targets bare metal MCUs, embedded Linux, and WASM, and produces cross-platform libraries with a clean C ABI.

## Use cases
- write formally verified embedded firmware
- transpile a safe language to plain C
- build cross-platform C libraries without dynamic memory
- verify C code for undefined behavior at compile time
- target arduino or esp32 with a modern language
- integrate verified code into zephyr or freertos projects

## When to choose
- you need C ABI output with compile-time mathematical proof of defined behavior
- you work on heapless embedded systems where C is the standard interface
- you want rust-like ergonomics but must ship plain C to vendor compilers

## When to avoid
- you need garbage collection, coroutines, or stack unwinding
- you want a large ecosystem and active development, as the project has had no releases since 2022
- you need heap allocation as a first-class pattern

## Facets
- artifact type: cli-tool
- maturity: maintenance
- function: compiler, programming-language, security, developer-tools
- domain: programming-languages, compilers, embedded-systems, security, developer-tools
- platform: windows, cli, embedded, wasm, rust
- tags: transpiler, symbolic-execution, formal-verification, c-abi, bare-metal, smt-prover, embedded-firmware, linux, macos

## Member repositories
- zetzit/zz (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:09.337849+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:53:28.654803+00:00, confidence not recorded.
  - readme: https://github.com/zetzit/zz (fetched 2026-08-28T04:05:09.337849+00:00, sha ce7c58fa4d5f)
- Data as of 2026-08-30T08:39:29.467469+00:00.