- Revised architecture alignment in README.md to reference JSON package format.
- Enhanced SUMMARY.md with detailed specifications for workflow, collaboration, and integration systems.
- Updated package_system.tla to include JSON package format and manifest path.
- Modified validate-specs.sh to include package_system.tla in validation checks.
- Added `package_system.tla` to model the schema-driven package system, including multi-source loading, validation, dependency resolution, and permission filtering.
- Created `package_system.cfg` for TLC model checker configuration, defining constants and invariants for bounded model checking.
- Updated `metabuilder.tla` to reflect the core specification of MetaBuilder, emphasizing the package lifecycle and related specifications.
