Update progress log with Phase 2 deliverables, mark Phase 2 complete in TODO/CHANGELOG/README, fix stale Solid.js reference in findings, update task_plan status to BUILDING, add v2 key paths to CLAUDE.md.
Architecture decision: Tauri 2.x + Svelte 5 + Claude Agent SDK (Node.js sidecar). Includes research on Agent SDK streaming, xterm.js performance, WebKit2GTK limitations, and adversarial review corrections (two-tier observation, Svelte 5 over Solid.js, SDK abstraction layer). Six implementation phases defined, MVP = Phases 1-4.
