Claude-chill: A PTY Proxy Tool to Optimize Claude Code's Terminal Output Performance
By
behnamoh
Pulled from the oven just right. Trustworthy, fact-dense, deeply satisfying.
Summary
Claude-chill is a PTY proxy tool designed to solve performance issues with Claude Code's terminal output. The problem is that Claude Code sends entire screen redraws in atomic sync blocks, causing lag and flicker in terminals when only a small portion of the screen is visible. The solution is claude-chill, which uses VT-based rendering to tame these massive terminal updates by processing and optimizing the output before it reaches the terminal, improving user experience.
Key quotes
· 4 pulledClaude Code uses synchronized output to update the terminal atomically. It wraps output in sync markers (\x1b[?2026h ... \x1b[?2026l) so the terminal renders everything at once without flicker.
The problem: Claude Code sends entire screen redraws in these sync blocks - often thousands of lines. Your terminal receives a 5000-line atomic update when only 20 lines are visible.
This causes lag, flicker, or jitters in the terminal, making for a poor user experience.
claude-chill is a PTY proxy that tames Claude Code's massive terminal updates using VT-based rendering.
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