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Claude Code v2.1.275 ·

New subscribable signal for host tool-declaration state

Claude Code adds an internal signal tracking whether a connected host has declared its tools

TierUnder the hoodhow much it should matter to you
Useful1my rating, 1 to 5
Signal1worth watching, 1 to 5
AreaElsewherewhat it touches
KindInternal Changesin v2.1.275,
Under the hood

Claude Code adds an internal signal tracking whether a connected host has declared its tools

What

Claude Code now tracks, per connected host, whether that host has 'declared' its tools, using a new reactive flag with helpers to mark a host as declared, mark it as undeclared, and subscribe to changes in that state. This is wired in so that clearing a session marks the host as undeclared again.

Why

This is internal plumbing for tracking tool-declaration state per host; the finding does not describe a user-facing effect.

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 doubtWhat functionality depends on this declared/undeclared signal is not shown by the evidence.

See this entry in the whole of v2.1.275 →