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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.51 ·

LLM-Based Memory Retrieval

Entry
JSON All of v2.1.51
EntryKind: in v2.1.51,
ChangesSection of the release

The memory system has been redesigned to use LLM-based retrieval instead of grep-based keyword search. Previously, memories were found by extracting search terms and grep-matching against markdown files. Now:

  • Memories are listed with filenames and descriptions
  • An LLM selects the most relevant memories (up to 5) based on the user's query
  • Memories already read via the Read tool in the current conversation are filtered out to avoid duplication
  • Memory files support a description frontmatter field for better retrieval
Evidence

Selection prompt "You are selecting relevant memories for a user's query..." and function x8q for deduplication (search for "You are selecting relevant memories")

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

See this entry in the whole of v2.1.51 →

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