llm/9b2efe03-4d9e-4db2-a79a-13cee83b17d6/topic-1-52bdd239-e593-4c83-b697-527264765c12-output.json
While context-mode offers significant token savings for built-in tools and CLI wrappers, users have confirmed that it cannot currently intercept or compress MCP tool responses due to the lack of a "PostToolUse" hook in Claude Code. This architectural limitation means MCP data flows directly into the context, leading to "un-eatable" token consumption unless MCP authors manually implement server-side summarization and drill-down tools. Beyond these technical hurdles, some participants express concern that aggressive compression might inadvertently degrade the model's reasoning quality or negate the economic benefits provided by prompt caching. Ultimately, the discussion establishes a clear boundary where context-mode remains highly valuable for subprocesses but requires a more intentional, design-heavy approach for third-party MCP integrations.