You MUST use this when writing or substantively editing prose in a project (docs, READMEs, marketing copy) and when asked to audit, score, or clean up negative parallelism, the "it's not just X, it's Y" construction. Not for ordinary factual negation.
Install
The individual skill folder is not confirmed. This command opens the repository’s skill selector; follow the upstream instructions.
skills CLI
npx skills add sentimony/skills