Three spikes gating the implementation plan: - Spike 1: pane mode capability (tmux split + cleanup) - Spike 2: data source stability (SQLite fields + JSONL event names) - Spike 3: inline fallback safety (scroll region + terminal cleanup) Each spike has goal, verification method, pass criteria, and fallback decisions. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>