10 tasks: kebab-core types, store breakdowns/index_bytes helpers, extended CountSummary + Stats wire mirror, HybridRetriever search_with_trace, App SearchResponse.trace threading, CLI --trace flag, integration tests, MCP SearchInput.trace, TUI TracePopup, docs (wire schema + README + SMOKE + INDEX + SKILL). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>