json_yaml_toml_parserlisted

# json_yaml_toml_parser Structured config parsers. ## Operations - `cfg.read(path)` — detects format by extension. - `cfg.write(path, obj, format?)` — preserves comments for YAML/TOML where possible. - `cfg.validate(obj, schema)` — JSON Schema. - `cfg.transform(path, patch)` — path-based updates; preserves shape. - `cfg.merge(a, b, strategy=deep|shallow)`. ## I/O Contract ```yaml io_contract: input: { op, path_or_obj, args } output: { obj_or_ok } idempotent: for_same_inputs side_effects: ["fs?"] ``` ## Safety - Schema validation before write when a schema is available. - Refuses to write if the result would be malformed.