The Hidden Cost of Tool I/O: Why Claude Code's Context Explodes

Claude Code users often focus on configuration optimization to save tokens, but accumulated tool I/O—file reads, command outputs, and grep results that serve a one-time purpose—actually consumes 87% of context history. This finding invalidates time-based memory compression approaches, which fail to distinguish ephemeral tool outputs from persistent conversation context. Understanding this distinction could fundamentally improve token efficiency for any developer using Claude Code, shifting focus from time-based to type-based memory management.