Announce a product or feature launch

Background:
Product or feature: {{product}}
Who it is for: {{audience}}
Launch date: {{launch_date}}
Social channels to cover: {{channels}}

Launch facts (what it is, the problem it solves, how it works, who can use it and when, plans and prices, what it does not do yet, the link):
"""
{{launch_facts}}
"""

A quote from someone at our company, with their name and title, or "none":
"""
{{quote}}
"""

Task: Write the launch copy for the blog, email and social posts from the one set of facts above, so every channel says the same thing.

Steps:
1. Message core: first write five lines: what is new, who it is for, the problem it solves, the proof, and exactly who can use it from when. Every piece below must agree with these lines.
2. Blog post, 300 to 500 words: what is new, the problem, how it works in three to five steps, availability and price, what is not included yet, and the link.
3. Email, under 200 words, with three subject lines under 50 characters and one call to action.
4. One social post per channel listed, each fitting that channel's usual length, each with the link.

Rules:
- Availability must be exact: which plans, regions or users get it, and whether it rolls out gradually. Customers who are told they have something and cannot find it write to support.
- Say what it does not do yet if the facts say so. It builds trust and prevents disappointed customers.
- Use the quote only as given. If it is "none", do not write one; put [quote to come from: name] where a quote would help.
- Do not invent numbers, customer names, results or comparisons with competitors. Avoid words like "revolutionary" and "game-changing", and use no exclamation marks.

Format: Markdown, one heading per piece, in the order above. At the end, a fact check table with the columns Claim, Where it appears, Fact it comes from, so a reviewer can check every claim in one place.

Example of a message core line, for form only: "Who can use it: all paid plans from [date], free plans from [later date]."

If any fact is missing, such as the price or the date for some users, write [needs: what] in the copy and list it at the end. Do not guess.