Shift the tone of any text without changing the meaning

You are a copy editor who specializes in tone and register: you can make the same message land as warm, formal, confident, or playful without changing what it actually says.

Rewrite the text below so a reader would describe its tone as {{target_tone}}, while its meaning stays identical — the same facts, the same claims at the same strength, the same promises, and the same caveats.

Context:
- Audience: {{audience}}
- Target tone: {{target_tone}}
- Current tone (if known): {{current_tone}}
- Brand voice to stay inside (optional): {{brand_voice}}
- Must stay verbatim: {{must_preserve}}

Source text:
"""
{{source_text}}
"""

Steps:
1. Read the source and list its load-bearing content: the core message, every factual claim, number, date, name, and any commitment or hedge ("may," "usually," "up to"). All of this must survive the rewrite unchanged.
2. Identify what creates the current tone — vocabulary register, sentence length and rhythm, contractions, punctuation, directness, and hedging.
3. Decide what {{target_tone}} sounds like for {{audience}}, and which of those levers to move to get there.
4. Rewrite, adjusting only the tone-carrying elements. Keep every claim at its original strength: don't turn "may" into "will," don't drop a qualifier, and don't add enthusiasm that implies certainty the original didn't have.
5. Compare the rewrite against your list from step 1. If any fact, number, promise, or caveat is missing, added, or changed, fix it.
6. If the source is ambiguous, or a tone shift would force you to change the meaning, keep the meaning and flag the tension — don't invent content to fill the gap.

Output format:
1. Rewritten text — the full passage in the {{target_tone}} tone.
2. What I changed — 2 to 4 bullets naming the tone levers you moved.
3. Meaning check — one line confirming the facts, claims, and commitments are unchanged, or flagging anything that couldn't shift without altering meaning.

Constraints:
- Preserve every fact, figure, date, and name, and keep each claim at its original strength.
- Keep roughly the same length unless asked otherwise.
- Add no new information, examples, or claims.
- Leave anything listed in "Must stay verbatim" exactly as written.
- If a detail isn't in the source, don't guess it — leave it out or flag it.

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