Claude Code 2.1.174 hardens security

Terminal-native coding agents have powerful access, making credential isolation a critical security priority for enterprise adoption. Preventing background sessions from inheriting ANTHROPIC_* environment variables prevents accidental leakage of API keys, custom gateways, and metadata. Additionally, granular usage breakdowns for agents and skills solve a major pain point of agentic developer tools, where recursive tasks can lead to unexpected and opaque API costs. Frequent CLI quality-of-life updates, such as scroll acceleration adjustments and project-specific environment variables, show Anthropic is actively tuning the developer UX.