Start with the user-facing change
Do not start from the commit message. Start from what changed for the user, why it matters, who it helps, and what they can do now that they could not do before.
Rewrite once per channel
X needs a tight hook and concrete detail. LinkedIn needs context and a clearer narrative. Blog needs structure and searchable language. The same update should become different posts, not copied text everywhere.
Use a review queue instead of instant publishing
The safest workflow is draft first, review second, publish third. That keeps the founder in control while still removing most of the repetitive work from content creation.