- Implement tito benchmark baseline and capstone commands
- Add SPEC-style normalization for baseline benchmarks
- Implement tito community join, update, leave, stats, profile commands
- Use project-local storage (.tinytorch/) for user data
- Add privacy-by-design with explicit consent prompts
- Update site documentation for community and benchmark features
- Add Marimo integration for online notebooks
- Clean up redundant milestone setup exploration docs
- Finalize baseline design: fast setup validation (~1 second) with normalized results
