# mstrobel/procyon

Procyon is a suite of Java metaprogramming tools, including a rich reflection API, a LINQ-inspired expression tree API for runtime code generation, and a Java decompiler.

Repository: https://github.com/mstrobel/procyon
Canonical: https://ross.abutalabs.com/products/procyon
Language: Java
License: NOASSERTION
License Family: other
Last push: 2022-06-12T17:09:04+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 2502, "days_push": 1543, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1212, forks 136 (observed 2026-08-28T04:04:00.415458+00:00)

## What it is
Procyon is a suite of Java metaprogramming libraries offering a rich reflection API inspired by .NET's System.Reflection, a LINQ-style expression tree API for runtime code generation, and an experimental Java decompiler. It is published on Maven Central as a set of JVM libraries.

## Use cases
- decompile java class files to readable source
- inspect generic types with a rich reflection api
- generate java bytecode at runtime
- build expression trees that compile to callbacks
- analyze compiled java code programmatically

## When to choose
- you need better generics introspection than core Java reflection provides
- you want declarative expression-tree-based runtime code generation on the JVM
- you need a Java decompiler for reverse engineering or analysis

## When to avoid
- you need actively maintained tooling with frequent updates
- you want a stable, non-experimental decompiler for production pipelines
- you are not working on the JVM or with Java bytecode

## Facets
- artifact type: library
- maturity: maintenance
- function: compiler, parser, developer-tools
- domain: developer-tools, programming-languages, compilers
- platform: jvm, cross-platform
- tags: java-decompiler, reflection, expression-trees, code-generation, metaprogramming, bytecode

## Member repositories
- mstrobel/procyon (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:00.415458+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 2026-08-30T06:18:00.786074+00:00, confidence not recorded.
  - readme: https://github.com/mstrobel/procyon (fetched 2026-08-28T04:04:00.415458+00:00, sha d3fdbd1211ff)
- Data as of 2026-08-30T08:39:29.467469+00:00.