social-card-gen — Claude Code skill: posts for Twitter/X, LinkedIn

What social-card-gen does

Give the skill a source message and it writes a separate version for each platform. It opens with four intake questions: the core idea, the tone you want, who should read it, and what you want people to do. Skip them and the copy comes out flat everywhere.

Two paths exist. With Node.js you run generate.js and pass input as --text, a file with --file, or a link with --url, sending output to stdout or a folder. Without Node.js the skill writes by hand using built-in rules: 280 characters for a single tweet, the two lines before “See more” on LinkedIn, no hashtags on Reddit. Three modes are available — quick for one platform, standard for all three, deep for variants plus A/B testing guidance.

Once the drafts are done, a self-review table checks the hook, the call to action and whether the tone fits the platform. The weakest variant gets named and explained. Guardrails block the obvious mistakes: identical copy pasted everywhere, and Reddit posts that open with self-promotion. If generate.js is missing, the manual path still produces the same result — automation is optional here.