# dotnet/runtimelab

This repo is for experimentation and exploring new ideas that may or may not make it into the main dotnet/runtime repo.

Repository: https://github.com/dotnet/runtimelab
Canonical: https://ross.abutalabs.com/products/runtimelab
License: MIT
License Family: permissive
Last push: 2026-08-24T05:13:14+00:00

## Health v2 (maintenance only)
Score: 77/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 35, longevity 100
- inputs: {"age_days": 2315, "days_push": 9, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1616, forks 224 (observed 2026-08-28T04:05:11.910007+00:00)

## What it is
dotnet/runtimelab is a sandbox repository for experimenting with new .NET runtime features and ideas that may eventually be upstreamed into the main dotnet/runtime repo. It hosts experimental branches such as Utf8String, NativeAOT-LLVM, ManagedQuic, and a CoreCLR interpreter.

## Use cases
- prototype a new .NET runtime feature before proposing it upstream
- try NativeAOT compilation targeting WebAssembly via LLVM
- experiment with a UTF-8 string type in the runtime
- test a fully managed QUIC implementation
- port the .NET runtime to a new platform like FreeBSD
- run .NET code with a CoreCLR interpreter

## When to choose
- you want to prototype or evaluate experimental .NET runtime changes
- you need a runtime feature not yet available in dotnet/runtime
- you are a runtime contributor validating an idea before upstreaming

## When to avoid
- you need a stable, production-ready .NET runtime
- you want official support or long-term API guarantees
- you are building typical applications rather than runtime tooling

## Facets
- artifact type: library
- maturity: experimental
- function: compiler, interpreter, developer-tools
- domain: programming-languages, compilers, developer-tools, performance
- platform: cross-platform, windows, wasm
- tags: dotnet, runtime, coreclr, mono, nativeaot, experimentation, utf8, quic, llvm, freebsd, linux, macos

## Member repositories
- dotnet/runtimelab (main) score 77

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:11.910007+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 2026-08-30T03:50:03.693292+00:00, confidence not recorded.
  - readme: https://github.com/dotnet/runtimelab (fetched 2026-08-28T04:05:11.910007+00:00, sha 5efc2beb0a79)
- Data as of 2026-08-30T08:39:29.467469+00:00.