ccusage Rust

Use this skill for the native Rust CLI under rust/crates/ccusage and rust/crates/ccusage-terminal.

Source Parity

Rust is the production implementation. Preserve existing Rust behavior unless the user explicitly scopes a behavior change. Before implementing or refactoring an agent, inspect the current Rust adapter and the agent source reference docs:

fd . rust/crates/ccusage/src/adapter/<agent>
sed -n '1,220p' rust/crates/ccusage/src/adapter/<agent>/README.md

When porting behavior from the historical TypeScript implementation, first find the relevant commit or tag that still contains apps/ccusage/src/adapter, then compare against that source. Do not assume origin/main still contains the TypeScript adapter.