> ## 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.

# SIFR-RUST-TRUST-0001: Rust interop trust declaration is missing.

> Rust interop trust declaration is missing.

`SIFR-RUST-TRUST-0001` belongs to the **Rust interop trust** diagnostic family. It means: rust interop trust declaration is missing.

## Why It Happens

A Rust interop dependency or item is blocked by trust policy. Declare trust explicitly for the required Rust surface.

<Info>
  Use `sifr --explain SIFR-RUST-TRUST-0001` locally to see the renderer's exact message template and any machine-applicable suggestions for the compiler version you are running.
</Info>

## Details

| Field                  | Value                                                                                                     |
| ---------------------- | --------------------------------------------------------------------------------------------------------- |
| Code                   | `SIFR-RUST-TRUST-0001`                                                                                    |
| Family                 | `RUST-TRUST`                                                                                              |
| Severity               | Error                                                                                                     |
| Stability              | stable                                                                                                    |
| Owner                  | `sifr_driver::build::rust_interop`                                                                        |
| Representative fixture | `crates/sifr_driver/src/build/rust_interop_tests.rs::package_rust_interop_rejects_untrusted_build_script` |

See the [Error Codes index](/diagnostics/error-codes) for the complete catalog.