# Fody/Fody

Extensible tool for weaving .net assemblies

Repository: https://github.com/Fody/Fody
Canonical: https://ross.abutalabs.com/products/fody
Language: C#
License: NOASSERTION
License Family: other
Last push: 2026-08-19T07:11:09+00:00

## Health v2 (maintenance only)
Score: 75/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 98, release rhythm 32, longevity 100
- inputs: {"age_days": 5171, "days_push": 14, "days_rel": 377, "gap_med": 82.5, "n_releases_24m": 5}
- 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 4541, forks 464 (observed 2026-08-28T04:08:53.130457+00:00)

## What it is
Fody is an extensible tool for weaving .NET assemblies, manipulating IL code as part of the build process. It provides an add-in model that eliminates the plumbing code normally required to integrate MSBuild and Visual Studio APIs for IL manipulation.

## Use cases
- weave IL into .net assemblies at build time
- inject code into assemblies without source changes
- implement aspect-oriented programming in .net
- write custom msbuild il post-processing add-ins
- modify compiled assemblies during build pipeline

## When to choose
- you need to modify .NET assembly IL as part of your build
- you want to add cross-cutting concerns like logging or INotifyPropertyChanged without source changes
- you are building a Fody add-in and need the core weaving engine

## When to avoid
- you only need source-level code generation (use source generators instead)
- your project does not use MSBuild-based .NET tooling
- you cannot accept the project's patron/licensing expectations

## Facets
- artifact type: library
- maturity: active
- function: build-tool, compiler, plugin-system, developer-tools
- domain: developer-tools, programming-languages, compilers
- platform: dotnet, windows, cross-platform, cli
- tags: il-weaving, msbuild, aop, csharp, nuget, assembly-post-processing, automation

## Member repositories
- Fody/Fody (main) score 75

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:53.130457+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 2026-08-29T18:20:09.365281+00:00, confidence not recorded.
  - readme: https://github.com/Fody/Fody (fetched 2026-08-28T04:08:53.130457+00:00, sha 4f50bcc960a0)
- Data as of 2026-08-30T08:39:29.467469+00:00.