Run npm install in a medium-sized project. Count the deprecation warnings.
I counted 47 in one project. Each one says something like “This module is not supported and is kept for compatibility.” Claude Code reads all 47. They’re identical in meaning. They cost tokens. They push your actual code out of the context window.
What npm Install Actually Outputs
npm warn deprecated [email protected]: This module is not supported...
npm warn deprecated @humanwhocodes/[email protected]: Use @eslint/config-array
npm warn deprecated [email protected]: Rimraf versions prior to v4 are no longer supported
npm warn deprecated @humanwhocodes/[email protected]: Use @eslint/object-schema
npm warn deprecated [email protected]: Glob versions prior to v9 are no longer supported
npm warn deprecated [email protected]: This version is no longer supported...
⸨████████████████████░░░░░░░░░░░░░░░░░░░░░░░░░░░░⸩ ⠏ reify:core-js-compat: timing reifyNode...
added 1247 packages in 18s
Your AI needs exactly one line from this: added 1247 packages in 18s. Everything else is noise.
After ContextZip
added 1247 packages in 18s
💾 contextzip: 89,241 → 8,102 chars (91% saved)
91% reduction. 47 deprecation warnings → gone. Progress bars → gone. ANSI escape codes → gone. The install result is preserved.
Install
cargo install contextzip
eval "$(contextzip init)"
No config. No per-project setup. It just works as a transparent shell proxy.
GitHub: github.com/contextzip/contextzip
Part of the ContextZip Daily series. Follow for daily tips on optimizing your AI coding workflow.
Install: npx contextzip | GitHub: jee599/contextzip