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

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Context Mode

The other half of the context problem.

Every MCP tool call in Claude Code dumps raw data into your 200K context window. A Playwright snapshot costs 56 KB. Twenty GitHub issues cost 59 KB. One access log — 45 KB. After 30 minutes, 40% of your context is gone.

Inspired by Cloudflare's Code Mode — which compresses tool definitions from millions of tokens into ~1,000 — we asked: what about the other direction?

Context Mode is an MCP server that sits between Claude Code and these outputs. 315 KB becomes 5.4 KB. 98% reduction.

cc-04.mp4

Install

claude mcp add context-mode -- npx -y context-mode

Restart Claude Code. Done.

Plugin install (includes auto-routing skill + subagent hook) /plugin marketplace add mksglu/claude-context-mode /plugin install context-mode@claude-context-mode Installs the MCP server + a skill that automatically routes large outputs through Context Mode + a PreToolUse hook that injects context-mode routing into subagent prompts. No prompting needed.

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