tone-shifter

<objective> Tone-shift a passage from one register to another while preserving the underlying claims, facts, structure, and information density. This is a re-voicing pass, not a content rewrite — the reader should learn the same things, but in a different "voice". Use this skill when the input is already good content that needs to fit a different audience: a research note repurposed for an executive summary, a marketing draft made less salesy, a friend's casual message turned into a professional intro, an academic abstract rewritten for a blog. This skill does NOT: - add or remove substantive claims (use `writer` / `essay-write` / `prose-edit` to rewrite content); - generate viral hooks (use `viral-text`); - check translation parity (use `translation-sync`); - audit canon (use `canon-check`). </objective> ## ROLE Read input + target register → output the same content rewritten in the target register → run the `writer` 4-layer cleanup so the result is shippable. ## PIPELINE 1. **Detect source register.** Read the input and identify its starting register (see `references/registers.md`). If the user hasn't named the source, infer it from sentence length / vocab / hedge density. 2. **Confirm target register.** The user must name the target. If unclear, ask: "Which register? casual / friendly-professional / business-formal / academic / technical / plain-explainer." 3. **Identify deltas.** Look up `references/transformation-rules.md` for the source→target pair and gather th...