Follow Discord
Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial
HomeReleasesv2.1.6entry #7

Claude Code v2.1.6 ·

MCP Logging Infrastructure

Entry
JSON All of v2.1.6
EntryKind: in v2.1.6,
ChangesSection of the release

Added structured logging for MCP (Model Context Protocol) server errors and debug messages.

Details
  • New logMCPError() and logMCPDebug() functions for server-specific logging
  • MCP logs stored separately per server in mcp-logs-{serverName} directories
  • Error log sink initialization with buffering for early errors before sink is ready
Evidence

Lq9() at line 536969 (error log sink initialization, contains logMCPError, logMCPDebug)

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.6 →

Feedback