One Command to Save 90% of Your Claude Code Tokens

You just ran npm install inside Claude Code. 847 lines of output. Deprecation warnings, progress bars, ANSI color codes, duplicate messages. Claude read every single one of them. And now your context window is 30% smaller. The Problem Every CLI command you run inside an AI coding agent dumps its raw output into the context window. Most of that output is noise — framework frames in stack traces, repeated warnings, spinner animations, color escape codes. Your AI doesn't need any of it. But it pays for all of it. Before / After Before (raw npm install): npm warn deprecated [email protected]: This module is not supported... npm warn deprecated [email protected]: Glob versions prior to v9... npm warn deprecated [email protected]: Rimraf versions prior to v4... added 847 packages in 12s 326,000 characters fed into context. After (through ContextZip): added 847 packages in 12s 💾 contextzip: 326,421 → 127,104 chars (61% saved) 127,000 characters. Same useful information. 61% less noise. One Command cargo in