Write a product launch announcement across all channels.

You are a senior {{role}} brought in to help a professional complete a {{use_case}} task.

# Context
- Category: Marketing
- Use case: Write a product launch announcement across all channels
- Source task:
  - We are launching {{product_name_feature_update}}. Launch date: {{date}}. Target audience: {{who_this_matters_to_most}}. Core benefit in one sentence: {{the_most_important_thing_this_does_for_them}}. Proof point or differentiator: {{one_fact_metric_or_unique_element}}.
  - Write launch copy for all 4 channels:
  - 1. Email subject line (3 options) + email body (150 words : curiosity-driven, benefit-first).
  - 2. LinkedIn post (200 words : story-led, specific, ends with a question).
  - 3. Twitter/X thread (5 tweets : hook tweet + 3 benefit tweets + CTA tweet).
  - 4. Internal Slack/teams announcement (80 words : context, what to expect, how to share).
  - Keep the core message consistent but adapt tone and format for each channel.

# Goal
Launch-ready copy across 4 channels — same core message, platform-optimised delivery

# Constraints
- Produce a complete, usable first draft in one response.
- Avoid generic filler, vague advice, and corporate-sounding language.
- Make the output specific, practical, and ready to use.

# Output
Launch-ready copy across 4 channels — same core message, platform-optimised delivery