Rust Systems & Services

Covers modern application-layer Rust (edition 2024): CLIs, web services, libraries. Not no_std/embedded.

Working rules

• Preserve error variants in libraries and add operational context at application boundaries.
• Distinguish missing configuration from unreadable or invalid files before writing replacements.
• Keep blocking work off async workers, bound queues and spawned work, and define shutdown behavior.
• Trace exported interfaces before treating a change as internal; verify installed runtime capabilities.
• Do not mutate process-wide state in concurrent tests; exercise the real binary and relevant feature combinations.

Unsafe Discipline