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Sweep 06 Nov 2026 · 01:32Z Build v2.1.319 537 read Stable v2.1.311 Latest v2.1.318 Next v2.1.319 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.275 ·

MCP tool display UI now loads lazily

The UI code for displaying MCP tool results now loads only when actually needed, instead of being bundled eagerly

Group of 2 Under the hood Internal Changes
JSON All of v2.1.275
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
UIArea: what it touches
Internal ChangesKind: in v2.1.275,
Internal ChangesSection of the release

What

The registry of per-tool result renderers was restructured so that several plugin-specific tool UI entries are replaced by a single module that's lazily imported. Specifically, the mcp-display-only tool kind now has a getter-backed entry that only imports its display module (displayOnlyMcpToolUi) when that tool type actually needs to be rendered, rather than bundling it eagerly with everything else.

Why

This reduces the amount of code loaded upfront, since MCP display-only tool UI code is now fetched only when a session actually uses that tool type.

See this entry in the whole of v2.1.275 →

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