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#context editing

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Claude's memory tool lost its exemption from context editing

Anthropic's memory tool docs used to tell you to exempt memory from context editing. That paragraph was removed between February and August 2026, the cookbook still cites it at a dead anchor, and the surviving combined example ships unprotected in all nine languages.

12 min read254

Context engineering is four mechanisms, not one

Context engineering on the Claude platform is not a setting. It is four mechanisms at four points in the pipeline, and the one everybody enables first pays for context window with prompt cache.

14 min read206