Blog Pipeline Fence Corruption: How a Naive Sed Rule Swallowed Markdown Code Blocks

A draft came out of my blog generation pipeline with the frontmatter intact, the title correct, the word count in range, and roughly 1,400 words of prose rendered inside a single syntax-highlighted code block. Everything after the first bash example was gray monospace on a dark background. The build passed. The exit code was 0. One sed expression...