Open Source, MIT License, Fork of RTK — The Full Story

ContextZip exists because I kept running out of context window in Claude Code. Not because my code was too long, but because npm install output was eating 40% of it. The Origin I was using RTK (Reduce Toolkit) — a Rust CLI that strips ANSI codes and deduplicates output. It helped. A 30-50% reduction in CLI noise. But I was still hitting context limits during build-heavy sessions. The problem: RTK treats all output as plain text. It doesn't know that a Python traceback has "framework frames" and "application frames." It doesn't know that 40 TypeScript errors with the same message but different files are semantically identical. It can't distinguish deprecated warnings from security warnings. The Fork I forked RTK and started adding what was missing: Week 1: Language-aware stack trace filtering. Teach the tool to recognize Node.js, Python, Rust, Go, Java, and C# stack traces and strip framework frames. 412 tests. Week 2: Semantic duplicate grouping. Instead of exact-match deduplication, p