> ## Documentation Index
> Fetch the complete documentation index at: https://docs.sifr.sh/llms.txt
> Use this file to discover all available pages before exploring further.

# Stable compatibility

> Supported standalone targets, platform floors, and editor compatibility for Sifr stable.

## Supported standalone targets

Sifr `0.1.0` publishes exactly four standalone targets:

| Target                      | Platform floor |
| --------------------------- | -------------- |
| `aarch64-apple-darwin`      | macOS 15.0     |
| `x86_64-apple-darwin`       | macOS 15.0     |
| `aarch64-unknown-linux-gnu` | glibc 2.39     |
| `x86_64-unknown-linux-gnu`  | glibc 2.39     |

There is no Windows standalone installer in this release. Package-manager
distribution is also outside the stable standalone contract.

## VS Code extension

The qualified VS Code extension is `sifr.sifr-vscode` version `0.2.0`. Extension
and compiler versions are independent. Its advertised compiler range is
`>=0.1.0,<0.2.0`, which includes the current stable compiler and any eligible
`0.1.x` rollback target.

The extension remains a thin client. It starts the installed compiler with
`sifr lsp --stdio`; parsing, type checking, diagnostics, formatting, linting,
and testing remain compiler-owned.

## Rust interop

Stable Rust interop claims come only from
`stable_support_claims.json` and the compatibility matrix. The public
[Rust interop reference](/rust-interop) lists every claim with its exact
category and evidence scope. A `contract-only` row does not claim
runtime-observed support, and future-owned runtime work remains unadvertised.