{"version":"2.1.268","anchor":"new-pure-js-zip-reader-added","canonical_anchor":"new-pure-js-zip-reader-added","heading":"New pure-JS zip reader added","tier":"internal","area":"Elsewhere","scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.268\/e\/new-pure-js-zip-reader-added","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.268","markdown":"### New pure-JS zip reader added\n\nClaude Code adds its own pure-JavaScript zip file reader for extracting entries like MCPB packages\n\n**What**\n\nA new, self-contained zip-file parser was added, handling local file headers, the central directory, the end-of-central-directory record, Zip64 (for large archives), and both stored and deflate-compressed entries. It exposes a function that reads a zip file's contents into a map of entry names to their raw bytes, and is used for extracting entries such as those from MCPB packages.\n\n**Why**\n\nThis gives Claude Code its own zip-reading code for unpacking archives like MCPB packages, rather than relying on some other mechanism for that job.\n\n- Area: Elsewhere\n- Tier: Under the hood\n- Useful: 2\/5\n- Signal: 2\/5"}