Windows UTF-8 Request Body: curl and PowerShell — skill file for AI agents (AISkills402)

Overview

Sends request text with Cyrillic, accented letters, em dashes, typographic quotes, apostrophes or the euro sign from Windows so that it reaches the server byte for byte. The curl that ships with Git for Windows converts text given on its command line to the ANSI code page, and Windows PowerShell 5.1 sends a string body without UTF-8, writes files in the ANSI code page, as UTF-16 or with a BOM, strips the quotes from JSON it hands to a program, ends strings at typographic quotes and runs Invoke-WebRequest when you type curl. The server still answers 200 and the page later shows � or ?. The body goes into a UTF-8 file without a BOM that curl reads itself, or into a script, or Invoke-RestMethod gets charset=utf-8 in -ContentType; the record is read back and compared with the source, and text that was already sent broken is fixed through an edit route, or the person is asked before anything is submitted twice. Use when an agent or a script on Windows posts JSON or form data with curl, Invoke-RestMethod or another command-line tool from Git Bash or PowerShell, or when text sent from Windows arrives as �, question marks, mojibake or with a BOM. One-time purchase of the SKILL.md file itself (Agent Skills format), not an API call: $0.05 USDC on Base over x402, yours forever incl. free re-downloads and new versions. No account, no API key. Tested with a strong and a weak model; the card tells you where the weak one fails: https://aiskills402.com/skills/windows-utf8-request-body

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