Macro dev_log 

macro_rules! dev_log {
    ($Tag:expr, $($Arg:tt)*) => { ... };
}

Log a tagged dev message. Only prints if the tag is enabled via Trace.

In short mode: aliases long paths, deduplicates consecutive identical lines.

Release-mode behaviour: the entire body is gated on cfg!(debug_assertions). Production builds get zero logging by design - LLVM’s dead-code-elimination removes the format!, IsEnabled lookup, file-sink write, and dedup-mutex lock so the hundreds of dev_log! callsites in the IPC hot path don’t tax release builds at all. Type-checking still runs against the format arguments, which catches {} placeholder mismatches without imposing runtime cost.