PureYAML/CHANGELOG.md

Changelog

All notable changes to PureYAML are documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[Unreleased]

Added

• Bootstrap PureYAML as a root Swift package with no external dependencies.
• Add the first pure-Swift YAML model, parser, and dumper milestone.
• Add tests for block mappings, block sequences, common scalars, comments, and dump/parse round trips.
• Add path-aware YAML validation with duplicate-key checks, custom rules, and warning collection.
• Add the internal parse event model with marks, scalar styles, collection styles, alias events, anchor/tag metadata, and golden event tests for current parser behavior.
• Add the internal UTF-8 reader and scanner token layer with tests for comments, indentation, block entries, mapping indicators, flow delimiters, quoted scalars, block scalar headers, anchors, aliases, tags, and source marks.
• Add the internal scanner-token event parser for block collections, flow collections, aliases, anchors, tags, and line/column parser failures.
• Add the internal event composer and wire public parsing through scanner-token events into PureYAML.Model.Value, including flow collections, block scalars, anchors, aliases, and duplicate-key validation coverage.
• Add YAML directive and document-marker scanning, tag-handle expansion, and explicit built-in scalar tag composition for strings, integers, floats, booleans, and nulls.
• Expand tests into focused parsing, dumping, model, validation, and parse-error suites.
• Add macOS, Linux, and WASM verification gates and CI jobs, plus a local Linux check that can run through Claw Mini's Lima VM.
• Add a single full local verification script and wire pre-push through the macOS, Claw Mini Linux, and WASM gate sequence.
• Harden the changelog gate so local verification also sees unstaged source edits, not only committed or staged changes.
• Add emitter options with a selectable scalar policy for quoted strings or conservative plain-string output.
• Add opt-in literal block scalar emission for safe multiline strings, including |- parsing support for stripped final newlines.
• Add opt-in flow collection emission for compact mapping and sequence output.
• Add emitter corpus tests and document the current emitter policy.
• Add Yams and CYaml attribution without copying their implementation into Sources/.
• Add validation-rule predicates, a boolean validation-rule initializer, and validator authoring rules.
• Add scalar typed Decodable and Encodable conversion APIs with exact path-aware errors.
• Add unambiguous bracket-quoted validation paths for punctuation-heavy keys.
• Add keyed typed Decodable and Encodable conversion for mapping-backed structs.
• Validate YAML values before typed decoding so duplicate keys are rejected deterministically.
• Add unkeyed typed Decodable and Encodable conversion for sequences, including nested sequences and sequence properties on keyed structs.
• Add a fixture-backed sequence typed-conversion test corpus and a forbidden-pattern verification gate for package, source, and test contracts.
• Add broader Codable compatibility coverage for dynamic mapping keys, nested container round trips, keyed super coders, default super coders, and deterministic unsupported-shape errors.
• Add an explicit research-compatibility rule requiring parser, emitter, validation, and typed conversion work to start from PureYAMLResearch behavior without copying implementation code.

Changed

• Lower the package tools version to Swift 6.1 for hosted macOS CI compatibility and install Linux Swift toolchain prerequisites for the WASM CI job.
• Harden duplicate-key validation to use set membership while preserving exact diagnostics.
• Make validation rules immutable after construction.
• Preserve keyed super-encoder field order even when delayed child encoders are written in a different order than they were requested.
• Make keyed default superEncoder() and superDecoder() use the standard super mapping key instead of the current mapping.