adamksmith/claude-chill
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Dave Beesley
2026-01-16 22:50:11 -07:00
parent 961fc90313
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@@ -8,6 +8,18 @@ Claude Code uses synchronized output to update the terminal atomically. It wraps
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, and makes scrollback useless since each update clears history.
Analysis of terminal recordings confirms Claude Code wraps 100% of its output in sync blocks - every byte of visible output goes through synchronized updates.
Sync blocks start with one of three patterns (from a 3.5GB recording sample):
| Pattern | Count | Frequency | Avg Size |
|---------|-------|-----------|----------|
| Line clearing (`2K` + `1A` repeated) | 3,544 | 55% | 2.7 KB |
| Full screen clear (`2J` + `3J` + `H`) | 2,891 | 45% | 94.5 KB |
| CRLF + color codes | 1 | <1% | 2.0 KB |
The full screen clears are 35x larger than incremental line clears - these are the real problem.
## The Solution
claude-chill sits between your terminal and Claude Code: