COSESAI

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Em-dash & Typographic Purifier Field Guide: When AI-Generated Plain ASCII, Markdown Source, and Six Quote and Dash Decisions Decide Whether Your Manuscript Reads as Polished or as 1995

By xiezixing 2026年10月7日

Closing first: the Em-dash & Typographic Purifier is not a spell-checker, and treating it as…

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Font File Inspector Field Guide: When Five Containers, Four Variable Axes, and One OpenType Feature Toggle Decide Whether Your Font Lands as a Brand Asset or a Mystery Box

By xiezixing 2026年9月16日

Most font problems aren't font problems. They're metadata problems, coverage problems, or licensing problems hiding…

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Unicode Bidi Algorithm: Why One Paragraph Reorders Itself Before Your Eyes

By xiezixing 2026年9月14日

A field guide to UAX #9: how X1, N0, L2 reversal, paired brackets and isolate runs turn a single paragraph of mixed Latin and RTL into the visible order on screen.

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Font File Inspector Field Guide: When a 142 KB WOFF2 Hides a 332 KB sfnt, Six Tables Tell the Truth

By xiezixing 2026年9月10日

That 142 KB web font you shipped is hiding a 332 KB sfnt inside it.…

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Underline Text Field Guide: When One Combining Mark (U+0332) Decides Whether Your Emphasis Survives a Plain-Text Copy-Paste

By xiezixing 2026年9月8日

One invisible Unicode mark and every character picks up a line beneath it. The Combining…

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Text Pad & Align Field Guide: When Three Knobs Decide How a Line Sits Inside a Block

By xiezixing 2026年9月4日

Three knobs decide how a line of text sits inside a fixed-width block, and they…

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Sentence Case Converter Field Guide: When Four Heuristics Decide What ‘I’ Becomes

By xiezixing 2026年8月31日

A capital letter is not the same thing as a sentence break. A 1,200-word draft…

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Tiny Text Field Guide: When Two Unicode Blocks Carry Footnotes And Chemical Formulas

By xiezixing 2026年8月30日

Two Unicode blocks — Phonetic Extensions and Superscripts/Subscripts — give you about half the alphabet plus all ten digits. The other half passes through unchanged, which is the catch most people notice on their second paste.

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Cursive Text Field Guide: When Hand-Written Script Beats a Stretched Italic

By xiezixing 2026年8月30日

Every fancy-text tool generates cursive by mapping letters to the Mathematical Script block, then silently…

Underline Text Field Guide: When One Invisible Combining Mark Replaces HTML

By xiezixing 2026年8月28日

Combining low line is a single Unicode codepoint, U+0332, that draws a line under the…