What is codex-sell-my-saas-skill?

This is a skill (a small add-on) for Codex, an AI coding assistant made by OpenAI. The skill is called "sell-my-saas" and its job is to take the URL of any software product, startup, or landing page and produce ready-to-publish social media posts for three platforms: X/Twitter, LinkedIn, and Reddit. Installing it takes one command in your terminal. Once installed, you tell Codex to use the skill by typing something like "Use sell-my-saas for https://your-product.com". From there the skill reads the page at that URL, figures out what the product does, who it is for, and what the strongest reasons to buy it are. It then writes one post for each of the three platforms, styled to match how real posts look and sound on each site. You can also pass in tone instructions. The example in the README shows an Italian-language constraint, and the skill will write in Italian or English depending on what you ask. The skill is described as actively avoiding fake testimonials, inflated claims, and the kind of generic promotional copy that gets flagged or ignored on Reddit. The package itself is small: a skill definition file, a file of platform-specific writing patterns, a config file for the OpenAI agent, and an install script. There is no web interface and no server to run. It works entirely through Codex once the files are copied into place. This is useful if you are building or launching a software product and want a quick first draft of social posts without writing them from scratch. It is aimed at solo founders or small teams who already use Codex and want to add a marketing-assist step to their workflow.