fix(cli): add loading indicators for slow slash commands#882
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Replaces head-only stdout capture with a two-buffer approach (40% head, 60% tail rolling window) so scripts that print() their final results at the end never lose them. Adds truncation notice between sections. Cherry-picked from PR #755, conflict resolved (test file additions). 3 new tests for short output, head+tail preservation, and notice format.
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Summary
Cherry-pick and rebase of PR #714 by @vilkasdev onto current main. Shows loading indicators for slow slash commands so the CLI doesn't appear frozen.
What it does
/skills search|browse|inspect|installand/reload-mcpwith a_busy_command()context manager⏳ Searching skills...(etc.) status messageChanges from original PR
get_hint_text()had a duplicate return block inside the_clarify_freetextbranch that made the "↑/↓ to select" hint unreachable for multi-choice clarify prompts_normalize_model_for_provider,_on_thinking,/rollback,/skincommands)UX pitfalls verified
\033[KANSI escapes (would leak as?[Kunder prompt_toolkit's patch_stdout)_invalidate()uses the existing throttled repaint mechanismFixes #636
Tests
Co-authored-by: vilkasdev vilkasdev@users.noreply.github.com