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.
Move Phase 1 to completed in TODO.md, update README.md v2 status, and add scaffolding entries to CHANGELOG.md.
Add TODO.md, CHANGELOG.md, .claude/CLAUDE.md behavioral guide. Update README.md with v2 planning notice and docs links. Fix .gitignore to scope CLAUDE.md exclusion to root only.