Module structured_read 

Functions

extract_json_structure

JSON structure: key-tree with types, depth 3, max 20 keys per level. Reuses logic from patterns::json_schema but produces a read-mode output.

extract_lock_summary

Lock file summary: package count + direct dependency names.

extract_markdown_outline

Markdown outline: heading tree + fenced code block boundaries.

extract_toml_structure

TOML structure: [section] headers + top-level key=value pairs.

extract_yaml_structure

YAML structure: indent-based key extraction with nested structure.