Claude Code v2.1.121 Arrives with Powerful Upgrades and Critical Memory Leak Fixes

product #agent 📝 Blog|Analyzed: Apr 28, 2026 22:09•

Published: Apr 28, 2026 22:07

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1 min read

Analysis

The latest release of Claude Code is a massive win for developers, delivering crucial optimizations that significantly enhance the Agent experience. By allowing specific MCP servers to load constantly via the new 'alwaysLoad' setting, workflows become incredibly seamless and responsive. Additionally, squashing multiple memory leaks means users can enjoy much longer, uninterrupted sessions without draining system resources.

Key Takeaways

•The new 'alwaysLoad' feature allows developers to bypass tool-search delays and keep essential MCP tools instantly available.
•Three major memory leaks were fixed, including a massive one involving image processing that consumed gigabytes of RSS.
•PostToolUse hooks can now modify and filter outputs for all tools, not just MCP-specific ones, greatly expanding customization options.

Reference / Citation

"alwaysLoad: true を MCP server config に書くと、そのサーバの全ツールが tool-search 経由の遅延読み込みをスキップして即時利用可能になります。"

Q

Qiita AIApr 28, 2026 22:07

* Cited for critical analysis under Article 32.

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Source: Qiita AI