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Dev.to
7/22/2026
The twin is the page

The twin is the page

Short summary

The author consolidated ten hand-written HTML pages to render their prose from a single markdown source at request time, eliminating dual-editing drift. A parity gate caught six real divergences before retirement, replaced by a stricter mutation-tested check that prevents orphaned prose or missing sections. A rendering harness diffed outputs before and after conversion, catching one bug where markdown URL rules turned inert text into a live link.

  • •Ten card-style pages now render from a single markdown twin instead of duplicated HTML
  • •Replaced parity checker with mutation-tested deploy gate that validates prose provenance
  • •Rendering harness caught a bug where markdown URL rules turned inert text into a live link

Generated with AI, which can make mistakes.

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