Today I Learned
read this @SPEC.md and interview me in detail using the AskUserQuestionTool about literally anything: technical implementation, UI & UX, concerns, tradeoffs, etc. but make sure the questions are not obvious
be very in-depth and continue interviewing me continually until it’s complete, then write the spec to the file
https://www.atcyrus.com/stories/claude-code-ask-user-question-tool-guide
MCP-CLI is an experimental approach to MCP tool calling that dramatically reduces token consumption in Claude Code. Instead of loading full tool definitions into the system prompt, MCP-CLI provides Claude with minimal metadata about each server. When Claude needs detailed information about a specific tool, it requests it on-demand rather than consuming context upfront.
This enables on-demand tool information (only consume tokens for tools actually relevant to each session), programmatic output processing (pipe large outputs directly to files or process with jq to keep bulky data out of context), and the ability to scale to more tools without sacrificing context space.
Enable it with ENABLE_EXPERIMENTAL_MCP_CLI=true and share feedback in the GitHub issue.