Follow Discord
Sweep 10 Nov 2026 · 02:18Z Build v2.1.322 539 read Stable v2.1.311 Latest v2.1.322 Next v2.1.322 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.265 ·

Built-in tool classification gets a special-case exception for one built-in name

One built-in tool now gets a special-case exception in the built-in vs MCP classification logic

Under the hood Internal Changes
JSON All of v2.1.265
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
0Signal: worth watching, 1 to 5
Tooling ArchitectureArea: what it touches
Internal ChangesKind: in v2.1.265,
Internal ChangesSection of the release

Unclear The finding doesn't say which specific tool this exception applies to.

What

The internal logic that classifies a tool as MCP (Model Context Protocol), built-in, or undefined now takes an extra input and adds a special case: if a tool's name matches one particular built-in tool and none of the extra input matches a specific identifier, it's classified as "built-in" even in a situation where it would otherwise have failed the general built-in check.

Why

This fixes a case where that particular tool could be misclassified, ensuring it's consistently recognized as a built-in tool.

How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtThe finding doesn't say which specific tool this exception applies to.

See this entry in the whole of v2.1.265 →

Feedback