Stop Burning Your Context Window – How We Cut MCP Output by 98% in Claude Code
7 hours ago
- #AI Tools
- #Open Source
- #Context Management
- MCP tools dump raw data into Claude Code's context window, consuming significant space (e.g., Playwright snapshot: 56 KB, GitHub issues: 59 KB).
- Context Mode reduces tool output size by 98% (e.g., 315 KB → 5.4 KB), extending session time from ~30 minutes to ~3 hours.
- Sandbox isolates tool executions, capturing only stdout, preventing raw data from entering the context.
- Knowledge Base indexes content with SQLite FTS5, using BM25 ranking and Porter stemming for efficient searches.
- Validated across 11 scenarios with drastic reductions (e.g., access log: 45 KB → 155 B, Git log: 11.6 KB → 107 B).
- Open-source MIT license, available on GitHub, built to address the lack of solutions for compressing tool outputs.