debug: instrument VT pipeline for ANSI display investigation#15
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debug: instrument VT pipeline for ANSI display investigation#15
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…stigation Instrument the VT parse/snapshot/frame pipeline to diagnose the ANSI escape sequence width misalignment that causes line-wrap corruption with colored output (e.g. claude yes/no prompts). Three debug log targets, each enabled by setting the env var to a file path: - PTERM_DEBUG_DAEMON: daemon-side read_pty (n, esc count, cursor, errors), snapshot (len, esc count, size, wrapped rows), send_snapshot, flush_pty, and resize events. - PTERM_DEBUG_FRAMES: bridge-side protocol frame decode (type, len, esc count) and final stdout batch writes (len, esc count). - PTERM_DEBUG_OUTPUT: raw bytes written to Neovim stdout (pre-existing). Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Summary
追加したログ
PTERM_DEBUG_DAEMONread_ptyのパーサ状態（n, ESC数, cursor, errors）、snapshotの統計（len, ESC数, wrapped行）、send_snapshot/flush_pty/resizePTERM_DEBUG_FRAMESPTERM_DEBUG_OUTPUT使い方
PTERM_DEBUG_DAEMON=/tmp/pterm_daemon.log \ PTERM_DEBUG_FRAMES=/tmp/pterm_frames.log \ PTERM_DEBUG_OUTPUT=/tmp/pterm_output.bin \ nix run .#test-nvim調査後はこのブランチを削除またはログコードをstrip予定。
Test plan
nix run .#test-nvimでNeovimが起動するclaude yes）PTERM_DEBUG_DAEMONログで[snapshot] wrapped=に異常な行がないか確認[read_pty] errors=でvt100パーサエラーが出ていないか確認PTERM_DEBUG_FRAMESログでOUTPUT/SCROLLBACKのESC数を比較🤖 Generated with Claude Code