- Tab/Enter confirms the selected completion item - Up/Down arrows navigate the completion menu - Escape dismisses the menu (via existing dismiss_lsp_overlays) - Editor intercepts keys via completion_intercept_keys flag when menu is showing - Add AGENTS.md with LLM-powered predictive autocomplete idea Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>