/ Claude Code v2.1.63

Fixed race condition where concurrent config writes could wipe authentication data from ~/.claude.json (search for "See GH #3117")
Improved OAuth callback handling with better error message when the redirect URL is missing the authorization code (search for "Invalid callback URL: missing authorization code")
Fixed "Prompt cancelled by user" error propagation when prompts are cancelled during hook flows (search for "Prompt cancelled by user")
Improved orphaned version cleanup with better error handling for stat failures (search for "Failed to stat orphaned marker")
MCP server .mcp.json writes now use atomic datasync + rename pattern with proper file permission preservation, replacing the previous simpler write approach

The build it came inv2.1.63

28 Feb 2026 · 25 entries, this one is #21.

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Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.