When should I use ctx_execute instead of a standard Bash command?

You should use ctx_execute for any command expected to return more than 20 lines of output, such as test suites, git logs, or cloud infrastructure queries.

Which programming languages are supported in the sandbox?

The sandbox environment supports JavaScript for API/JSON tasks, Python for data analysis and statistics, and Shell for piping and pattern matching.

Is Context Mode compatible with Playwright and browser automation?

Yes, it is specifically designed to handle Playwright snapshots, which can be 135k+ tokens, reducing the actual context footprint to less than 500 bytes.

How does Context Mode reduce token usage?

It saves large command outputs to temporary files and uses specialized tools to process and query that data server-side, preventing raw text from flooding the chat context.

Does this skill interfere with code editing?

No. Context Mode is used for analysis, reading, and querying. You should continue using standard file-editing tools for any write operations.

Context Mode Optimizer

Name: Context Mode Optimizer
Author: mksglu

bymksglu

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7,311

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開発者ツール

Optimizes Claude's context window by sandboxing large tool outputs and providing efficient data analysis tools.

Context Mode is a performance-critical optimization layer for Claude Code designed to prevent context window bloat during complex development tasks. By intercepting large outputs from logs, tests, API responses, and browser snapshots, it routes high-volume data through specialized sandboxed tools like ctx_execute and ctx_execute_file. This approach achieves up to a 98% reduction in token usage, preserving Claude's reasoning capabilities and increasing session speed by keeping the conversation history lean and relevant.

主な機能

01High-efficiency Playwright integration for 99% reduction in snapshot token costs

027,311 GitHub stars

03Automatic sandboxing of large command outputs including logs, tests, and builds

04Intelligent subagent routing via PreToolUse hooks for seamless performance

05Server-side indexing and FTS5 search for external documentation and local files

06Pre-built analysis workflows for JSON, CSV, and complex data structures

ユースケース

01Analyzing multi-megabyte log files or build outputs without hitting token limits

02Indexing and querying large external API documentation or documentation repositories

03Inspecting complex web application states using Playwright snapshots and accessibility trees

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add mksglu/context-mode context-mode

For use in Claude.ai and ChatGPT