# dotnet/extensions

This repository contains a suite of libraries that provide facilities commonly needed when creating production-ready applications.

Repository: https://github.com/dotnet/extensions
Canonical: https://ross.abutalabs.com/products/dotnet-extensions
Language: C#
License: MIT
License Family: permissive
Topics: dotnet
Last push: 2026-08-26T17:14:38+00:00

## Health v2 (maintenance only)
Score: 98/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 97, longevity 100
- inputs: {"age_days": 4215, "days_push": 7, "days_rel": 21, "gap_med": 27.0, "n_releases_24m": 33}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3202, forks 891 (observed 2026-08-28T04:07:48.526860+00:00)

## What it is
A suite of .NET libraries from Microsoft providing production-ready capabilities such as resilience pipelines, telemetry, diagnostics, compliance, and AI abstractions. Originally built to support high-scale services like Microsoft Teams, it is now a core part of the .NET ecosystem.

## Use cases
- add resilience and retry pipelines to .NET services
- enhance logging, metering, and tracing in ASP.NET Core apps
- redact sensitive data from telemetry for privacy compliance
- unit test code that depends on ILogger or TimeProvider
- integrate generative AI models via abstractions and middleware
- run production experiments with contextual options

## When to choose
- building production-grade .NET or ASP.NET Core services needing robustness and observability
- you want Microsoft-supported, MIT-licensed extensions built on Polly
- you need standardized AI abstractions in .NET

## When to avoid
- working outside the .NET ecosystem
- you only need a tiny single-purpose utility rather than a broad library suite
- your project targets legacy .NET Framework versions

## Facets
- artifact type: library
- maturity: active
- function: logging, tracing, monitoring, middleware, testing, configuration-management, error-handling, llm-inference
- domain: backend, developer-tools, apis, large-language-models, monitoring
- platform: dotnet, cross-platform
- tags: resilience, polly, telemetry, aspnetcore, diagnostics, options-pattern, microsoft, web-server

## Member repositories
- dotnet/extensions (main) score 98

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:48.526860+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 2026-08-30T07:24:48.193189+00:00, confidence not recorded.
  - readme: https://github.com/dotnet/extensions (fetched 2026-08-28T04:07:48.526860+00:00, sha 4023e233cb2b)
- Data as of 2026-08-30T08:39:29.467469+00:00.