What: Interactive command history search similar to bash's reverse-i-search
How to use:
# In the interactive prompt, press Ctrl+R
# Type your search query - matches appear from command history
# Press Ctrl+R again to cycle through matches
# Press Enter to execute, Escape/Tab to accept without executingDetails:
- Displays "bck-i-search: " prompt when active
- Shows "failing bck-i-search: " when no matches found
- Searches through full command history including pasted content
- Ctrl+C cancels and restores previous input
- Evidence:
YNB() at line 429227,ZW5() at line 429311