Programmatic complexity analysis API.

Provides access to comprehensive code complexity metrics that work uniformly across all supported languages by operating on the unified MetaAST representation.

Delegates to Metastatic.Analysis.Complexity for the actual analysis, giving MetaCredo a stable API surface for downstream consumers (e.g., Ragex) that do not need to depend on Metastatic directly.

Metrics

• Cyclomatic Complexity -- McCabe metric, decision points + 1
• Cognitive Complexity -- Structural complexity with nesting penalties
• Nesting Depth -- Maximum nesting level
• Halstead Metrics -- Volume, difficulty, effort
• Lines of Code -- Physical, logical, comments
• Function Metrics -- Statements, returns, variables

Usage

alias Metastatic.Document
alias MetaCredo.Analysis.Complexity

doc = Document.new(ast, :elixir)
{:ok, result} = Complexity.analyze(doc)

result.cyclomatic       # => 2
result.cognitive        # => 1
result.max_nesting      # => 1