Bug Description

The ZSH widget displays raw ANSI escape codes instead of rendering colored text.

Observed Behavior

When typing in the shell, the suggestion appears with literal escape sequences:

➜  /tmp claude --dangerously-skip-permissions --resume^[[90m ^[[0m

The ^[[90m (gray) and ^[[0m (reset) codes are shown as text instead of being interpreted.

Expected Behavior

The suggestion text should appear in gray without visible escape codes.

Root Cause

In the zsh-widget output, the code uses:

POSTDISPLAY=$'\e[90m'"$POSTDISPLAY"$'\e[0m'

ZSH's POSTDISPLAY does not interpret ANSI escape sequences in all terminal/configuration contexts.

Suggested Fix

Use ZSH prompt expansion syntax instead of ANSI escapes:

POSTDISPLAY="%F{240}${POSTDISPLAY}%f"

Or use zle region highlighting:

region_highlight=("$#BUFFER $((#BUFFER + #POSTDISPLAY)) fg=gray")

Environment

• aprender-shell 0.1.0
• ZSH with oh-my-zsh (Powerlevel10k theme suspected)
• Linux

Reproduction

1. cargo install aprender-shell
2. aprender-shell train
3. aprender-shell zsh-widget >> ~/.zshrc
4. source ~/.zshrc
5. Start typing a command