Claude Code 2.1.148 adds workflow tool, pinned sessions

Anthropic is pivoting Claude Code from a chat-over-files interface into a programmable agentic platform. The Workflow tool is a massive win for reliability, allowing developers to script deterministic paths for agents that previously felt "vibes-based." This update also introduces inline PR reviews with the /code-review command and brings cost transparency to the plugin marketplace, which now projects token usage before installation. These changes collectively harden the CLI for production-grade engineering workflows.