Rust Strict Standard

Security and strictness rules complementing the existing rust-skills (179 rules). These rules are derived from 5 production Rust projects.

CRITICAL: Workspace Lint Configuration

Every Rust project must configure workspace lints. Baseline:

# Cargo.toml (workspace root)
[workspace.lints.rust]
unsafe_code = "deny"              # No unsafe in production code
unused_qualifications = "deny"

[workspace.lints.clippy]
unwrap_used = "deny"              # Force proper error handling
expect_used = "deny"              # Same: use ? or ok_or_else()