v0.4.0

Added

• Backward scalar, mapping, and sequence anchors and aliases with document scoping and recursion checks.
• Mapping merge keys from aliases, inline alias lists, and flow mappings with YAML merge precedence.
• %YAML and %TAG directives, scalar tag syntax, and explicit scalar mapping keys.
• --type inspection for core scalar types while preserving text output.
• An advanced conformance fixture plus explicit rejection tests for every documented boundary.

Fixed

• Reject undefined, forward, recursive, and non-mapping merge aliases with actionable errors.
• Reject duplicate keys and ambiguous flattened query paths instead of returning competing values.
• Reject unknown directives, collection-valued complex keys, block merge lists, and multiline flow collections instead of misparsing them.

Changed

• Buffer parser records so merge precedence and explicit overrides are deterministic.
• Replace the blanket feature disclaimer with a tested support contract and precise intentional limitations.
• Update GitHub Actions checkout to v7 and bound CI jobs to ten minutes.