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

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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