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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.1.83

Memory System Prompt Refinements

The memory guidance system prompt has been significantly rewritten for clarity:

  • MEMORY.md entries are now recommended to be under ~200 characters (up from ~150) with detail moved to topic files
  • Byte-size truncation added alongside line-count truncation for oversized MEMORY.md files
  • New instruction: "If the user says to ignore or not use memory: proceed as if MEMORY.md were empty"
  • HTML comment stripping added when processing MEMORY.md content
Evidence

Memory prompt updates (search for "Keep index entries to one line under ~200 chars")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.83 →