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Highlander pattern — one view at each level, clean transitions: Level 1 - Run List: - Active runs (live, with progress bars) - Recent runs (in-memory session runs) - History from DB (all saved runs, click to drill down) Level 2 - Pipeline Detail (click any DB run): - Breadcrumb nav: Monitor → mode #id - Header card with mode, models, timestamp, full prompt - Step timeline with dot indicators on a vertical line - Each step shows: model, role tag, character count, token estimate - Green dots for completed, red for errors Level 3 - Response Text (click any step): - Accordion expand/collapse on click - Full response text in monospace scrollable container - Smooth max-height transition Architecture ready for Level 4 (future AI comparison): - Responses are individually addressable by step index - Role-based grouping visible in timeline - Side-by-side view can be added per-step Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>