dashu

Runs formatting/lint/test/semver checks before publishing. This skill should be used when the user asks to "publish dashu", "publish a sub-crate", "do pre-publish checks", "prepare a release", "cut a release", "bump the version", "check before publishing", or mentions publishing/releasing a new version of `dashu` or any sub-crate (`dashu-base`, `dashu-int`, `dashu-float`, `dashu-ratio`, `dashu-macros`).

This skill should be used when the user asks to "support a trait from another crate", "implement a third-party trait", "add an integration for crate X", "add num-traits / serde / rand / ... support", "add a feature flag for a new dependency", "wire up crate X behind a feature", "expose type X for crate Y", or "support a new major version of rand / serde / num-traits / diesel / postgres-types" (e.g. "add rand_v09 alongside rand_v08", "support diesel v3"). It provides the SOP for adding an optional third-party dependency behind the project's versioned-feature-flag policy, placing the trait impls in the right module, forwarding the feature across crates and the meta crate, and keeping the no_std/MSRV/changelog invariants intact.