Claude Code v2.1.136: MCP Reliability Fixes and hard_deny Auto Mode
Anthropic
Claude Code v2.1.136 adds `settings.autoMode.hard_deny` for unconditional auto-mode classifier rules and `CLAUDE_CODE_ENABLE_FEEDBACK_SURVEY_FOR_OTEL` for enterprise OpenTelemetry users. The release fixes MCP servers disappearing from `.mcp.json`, plugins, and claude.ai connectors after `/clear`; resolves OAuth refresh token loss during concurrent MCP server refreshes; and corrects a 400 API error when extended thinking emitted a redacted thinking block after a tool call.
Why it matters
Hardens enterprise deployment and MCP reliability for Claude Code's fast-growing agent orchestration use cases.
Importance: 2/5
Fixes MCP server disappearance and OAuth refresh race; adds hard_deny auto-mode rules for enterprise policy enforcement.