40 Identical TypeScript Errors? Group Them Into 1

You renamed an interface property. TypeScript reports the error in every file that uses it. 40 files, 40 identical error messages:

src/components/Header.tsx(12,5): error TS2339: Property 'userName' does not exist on type 'User'.
src/components/Sidebar.tsx(8,3): error TS2339: Property 'userName' does not exist on type 'User'.
src/components/Profile.tsx(23,7): error TS2339: Property 'userName' does not exist on type 'User'.
src/pages/Dashboard.tsx(45,11): error TS2339: Property 'userName' does not exist on type 'User'.
src/pages/Settings.tsx(19,5): error TS2339: Property 'userName' does not exist on type 'User'.
... (35 more identical errors)

Claude reads all 40. It understands the problem after the first one. The other 39 just consume context.

After: Grouped by ContextZip

error TS2339: Property 'userName' does not exist on type 'User'.
  → 40 occurrences in: Header.tsx, Sidebar.tsx, Profile.tsx, Dashboard.tsx, Settings.tsx, ... +35 more
💾 contextzip: 3,847 → 198 chars (95% saved)

One error description. A count. A list of affected files. 95% reduction. Your AI gets the same information and has room for your actual code.

How It Works

ContextZip detects repeated patterns in command output. When the same error message appears multiple times with only the file/line differing, it groups them into a single entry with a count and file list.

This works for:

• TypeScript compilation errors
• ESLint warnings repeated across files
• Test failures with the same assertion
• Any repeated pattern in CLI output

cargo install contextzip
eval "$(contextzip init)"

GitHub: github.com/contextzip/contextzip

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Part of the ContextZip Daily series. Follow for daily tips on optimizing your AI coding workflow.

Install: npx contextzip | GitHub: jee599/contextzip