ja-humanizer — Write, Rewrite and Check Japanese Without AI Tells

Japanese written by a language model is recognizable by its word choice and rhythm, and it tends to leave out the facts a reader needs to decide the next action. This skill does three things with one set of rules: it writes Japanese from scratch under a built-in norm, it rewrites existing Japanese to remove AI tells, and it checks Japanese mechanically. When a sentence is thin, the skill asks the writer for the missing fact instead of inventing one.

The norm lives in references/norms.md (日本語: norms.ja.md); the tiered tell catalog in references/patterns.md (日本語: patterns.ja.md); worked before/after pairs in references/examples.md (日本語: examples.ja.md); the mechanical checker in references/scripts/ja-humanizer-check.mjs; the voice sample template in references/voice-template/README.md (日本語: README.ja.md).