Claude Code 2.1.274 release notes

Version

2.1.274

Released

17 September 2026

Status

Stable release

What's new in Claude Code 2.1.274

The official notes for Claude Code 2.1.274 list 108 changes: 7 new features, 44 fixes, 1 performance improvement, 1 security change and 55 other changes.

• 7 new features
• 44 fixes
• 1 performance improvement
• 1 security change
• 55 other changes

Highlights

• security change [Claude Code on the web] Fixed commits in cloud sessions occasionally failing with a signing error for a few minutes…
• new feature Added CLAUDE_CODE_MCP_STARTUP_WAIT_MS to bound how long the first non-interactive turn waits for connecting MCP servers (0 = don't wait)
• new feature Added effort attribute to the claude_code.llm_request OpenTelemetry trace span, matching the api_request event
• new feature Added claude_code.managed_settings_resolved OTel event: managed-settings sources and policy helper state; redacted settings and digests with OTEL_LOG_MANAGED_SETTINGS=1
• new feature Added store.connect_timeout_seconds to the Claude apps gateway config to lengthen the Postgres connect timeout (default 5 seconds), and improved the…

Our short summary: changes are counted and classified automatically from the official notes, and highlights are shortened. The complete, authoritative list is in the official release notes on GitHub.

Full release notes on GitHub (Claude Code 2.1.274)

All Claude Code release notes · All releases

Also tracked: Claude news · Claude resets · Claude Code release notes · Blog