Sweep 19 Sep 2026 · 02:36Z Build v2.1.278 500 read Stable v2.1.267 Latest v2.1.278 Next v2.1.278 Feeds RSS JSON llms.txt Unofficial
Claude Code v2.1.277 ·

SDK bridge re-announce now also reacts to MCP command-list changes

SDK bridge now re-announces its init state when the list of MCP commands changes, not just model or permission settings

TierUnder the hoodhow much it should matter to you
Useful2my rating, 1 to 5
Signal2worth watching, 1 to 5
AreaMCPwhat it touches
KindInternal Changesin v2.1.277,
Under the hood

SDK bridge now re-announces its init state when the list of MCP commands changes, not just model or permission settings

What

The function that decides whether the SDK needs to re-send its 'system/init' bridge announcement now also factors in the sorted list of non-terminal MCP command names, in addition to the model, permission mode, fast-mode, and effort settings it already checked.

Why

This means that if the set of available MCP commands changes during a session, SDK-connected clients are now notified via a fresh announcement, keeping their view of available commands in sync.

See this entry in the whole of v2.1.277 →