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metastatic

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Cross-language code meta-model library using unified MetaAST representation. Parse, transform, and translate code across Python, Elixir, Ruby, Erlang, Haskell, and more via a shared three-tuple AST format.

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CHANGELOG.md 

# Changelog



All notable changes to this project will be documented in this file.



The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),

and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).



## [Unreleased]



### Added

- M2.2s Structural/Organizational Layer - New meta-model layer for cross-language structural constructs

  - `container` type for modules/classes/namespaces with visibility-aware member tracking

  - `function_def` type for function/method definitions with guards, visibility, and pattern parameters

  - `attribute_access` type for field/property access on objects

  - `augmented_assignment` type for compound assignment operators (+=, -=, etc.)

  - `property` type for property declarations with getters/setters

- Full support for M2.2s types across all analysis modules:

  - Duplication fingerprinting (Type I/II clone detection)

  - Cyclomatic complexity analysis

  - Cognitive complexity analysis

  - Nesting depth tracking

  - Halstead metrics (operators/operands)

  - Function metrics (statements, returns)

  - Lines of code (LoC) counting

- Comprehensive test coverage: 143 new tests for structural types (1,149 total tests passing)

- Helper functions: `container_name/1`, `function_name/1`, `function_visibility/1`, `has_state?/1`



### Documentation

- Added `STRUCTURAL_LAYER_RESEARCH.md` - Theory and cross-language analysis of structural constructs

- Added `STRUCTURAL_LAYER_DESIGN.md` - Implementation design decisions and rationale

- Updated `README.md` with M2.2s layer description

- Enhanced `@typedoc` for all structural types with M1 instances and examples



## [0.1.0] - 2026-01-21



MVP



## Notes



This project follows a rigorous theoretical foundation based on:

- OMG Meta Object Facility (MOF) Specification

- Eclipse Modeling Framework (EMF)

- Formal meta-modeling theory



See `THEORETICAL_FOUNDATIONS.md` for the complete formal treatment with proofs.