glycerine/zygomys

Zygo is a Lisp interpreter written in 100% Go. Central use case: dynamically compose Go struct trees in a zygo script, then invoke compiled Go functions on those trees. Makes Go reflection easy. observed · 2026-08-28

github.com/glycerine/zygomys · homepage · Go · BSD-2-Clause (permissive) observed · 2026-08-28

Health v2 · maintenance only

73/100

Activity 90
Release rhythm 35
Longevity 100

Flags: no_releases

How is this computed?

round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-02. Adoption (stars, forks) is never an input.

gap_med: n/a
age_days: 3888
days_rel: n/a
days_push: 64
n_releases_24m: 0

Full methodology

Adoption not part of the score

1787 stars · 85 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Zygomys is an embeddable Lisp interpreter written in pure Go, with an optional infix syntax subset of Go and a standalone REPL called zygo. It is designed for scripting Go applications, using reflection to build trees of native Go structs from scripts and invoke compiled Go functions on them.

Use cases

embed a scripting language in a Go application
create a domain-specific language to drive my Go program
script configuration of complex Go struct trees
make an interactive command-line REPL for my app
run sandboxed user scripts safely
manipulate JSON and msgpack data from a script

When to choose

you need an embeddable, pure-Go scripting/DSL engine with easy Go struct interop via reflection
you want a Lisp with readable infix math syntax and a REPL
you need sandboxed script execution or JSON/msgpack-driven configuration

When to avoid

you need maximum script execution speed of compiled code
your project is not in Go
you need a mainstream scripting language with a large ecosystem like Lua or Python

Facets

library · maturity active

interpreter programming-language cli developer-tools programming-languages developer-tools apis go cross-platform cli lisp embedded-scripting dsl repl reflection msgpack infix-syntax automation

2 sources

readme: https://github.com/glycerine/zygomys · fetched 2026-08-28 · db4466d6d637
homepage: https://github.com/glycerine/zygomys/wiki · fetched 2026-08-29 · 8b30d9d7a30c

Member repositories

Repository	Role	Health v2
glycerine/zygomys	main	73

For agents

markdown · JSON · MCP: product_card(name="glycerine/zygomys")

Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem