Show HN: Context Mode – 315 KB of MCP output becomes 5.4 KB in Claude Code

Source: Hacker News

Overview

Every MCP tool call dumps raw data into Claude Code’s 200 KB context window. A Playwright snapshot costs 56 KB, 20 GitHub issues cost 59 KB. After 30 minutes, 40 % of your context is gone.

I built an MCP server that sits between Claude Code and these outputs. It processes them in sandboxes and only returns summaries. 315 KB becomes 5.4 KB.

Features

• Supports 10 language runtimes.
• SQLite FTS5 with BM25 ranking for search.
• Batch execution.
• Extends usable session time before slowdown from ~30 min to ~3 hours.

Installation

/plugin marketplace add mksglu/claude-context-mode
/plugin install context-mode@claude-context-mode

Benchmarks & Source

• Benchmarks and source code are available at:

Feedback

I’d love feedback from anyone hitting context limits in Claude Code.

Comments URL: (Points: 11)