Social assets

File	What it is	Rebuild
netctl-share-card.png	1200×630 card: the README hero and Open Graph preview	./docs/social/build-social-card.sh
netctl-social-card.html / .jpg	1600×900 (16:9) card for LinkedIn and X: the product story in five steps	same script
netctl-share-card.html	Source for the 1200×630 share card	same script

Needs Google Chrome and macOS sips (already on a Mac); nothing is installed.

Every claim on the social card is already sourced in the project README and docs. Licence wording follows LICENSE: Apache License 2.0.