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Why XML Tags Are so Fundamental to Claude

glth · published 1 March 2026

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First cited: 8 Apr 2026
Most recent: 8 Apr 2026
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Links from this post: 8
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Context Engineering: The Skill That Replaced Prompt Engineering Read at the source ↗

8 Apr 2026

Context Engineering: The Skill That Replaced Prompt Engineering Read at the source ↗

8 Apr 2026

Links from this post

Link

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https://glthr.com/page/delimiters-in-languages

glthr.com

First-Order, Second-Order Expressions, and Delimiters in Languages Read at the source ↗

https://platform.claude.com/docs/en/build-with-claude/prompt-engineering/claude-prompting-best-practices

platform.claude.com

https://old.reddit.com/r/ClaudeAI/comments/1psxuv7/anthropics_official_take_on_xmlstructured

old.reddit.com

https://blog.promptlayer.com/prompt-engineering-with-anthropic-claude-5399da57461d

blog.promptlayer.com

Formulaic Delimiters in The Iliad and The Odyssey Read at the source ↗

https://github.com/aws-samples/prompt-engineering-with-anthropic-claude-v-3/blob/main/04_Separating_Data_and_Instructions.ipynb

github.com

LLM Delimiters and Higher-Order Expressions Read at the source ↗