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Developer builds portrait Bluesky summary cards in Python using Playwright, no APIs

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A developer created a Python script called generate-summary.py to produce 1080×1350 portrait images for Bluesky link previews, replacing the standard 1200×630 landscape format used on other platforms. The tool reads a custom YAML frontmatter block called summary_data from each article, which defines a headline, optional visual elements, and a tagline. Three layout types are supported — a comparison card grid, a pipeline flow, and a stats row — with only one rendered per article depending on which key is present. Playwright Chromium screenshots an inline HTML template at exact pixel dimensions, requiring no external image APIs or third-party services. The script also applies HTML escaping to prevent injection issues, treating highlighted text spans as a controlled exception via regex parsing.

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