Code follows the Rust Style Guide

Code in RSB must conform to the official Rust Style Guide, applied through rustfmt at its default configuration. A crate complies when cargo fmt --check reports no changes; any formatting rustfmt would rewrite is non-compliant.

This standard governs formatting and style only — indentation, line width, import layout, brace and expression conventions. It does not cover module and dependency relationships, error handling, API design, or lint configuration; each of those is governed by its own standard as the decision behind it is made.

Rationale

This standard exists because ADR-0001 established that RSB stands on community consensus for the mechanical basics rather than authoring its own. The Rust Style Guide is the community’s settled answer and rustfmt is its mechanical enforcement, so compliance is automatic and machine-verifiable, with no human judgment to drift. The rule is kept deliberately thin: it points at the canonical source instead of restating it, so it cannot fall out of sync with upstream.

References

• The Rust Style Guide — the formatting and style conventions this standard adopts.
• rustfmt — the tool that applies and checks them, plus its configuration reference.