Claude Code aifirst-review

Claude Code 2.1.121 review: PostToolUse hooks can now replace output for all tools

TLDR

In 2.1.120-2.1.121, PostToolUse hooks can replace tool output for all built-in tools, not just MCP tools. MCP servers auto-retry startup 3 times, and unbounded memory growth with images was fixed.

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Source: aifirst-review · Category: Claude Code · Summary is machine-generated; verify against the original.

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Claude Code 2.1.121 review: PostToolUse hooks can now replace output for all tools

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