Legacy implementation changelog

These notes belong to the predecessor openapi-client-codegen implementation. They are preserved for migration history, not as published openapi-chain versions.

UnreleasedCopy Anchor Link

• Split the exact-wire serializer into the opt-in /strict entry so the default schema-free client stays tiny.
• Added a hard 2048-byte transitive gzip regression gate for the default core bundle.
• Added operation-derived per-call extensions for path, query, querystring, header, cookie, body, response, and final-request customization.
• Hardened dynamic path typing, operation-level parameter overrides, $path() arguments, media/body correlation, and dynamic throwOnError overloads.
• Corrected response typing for exact status, nXX, default, and empty-content responses.
• Added optional branded compiled OpenAPI runtime metadata through the separate /metadata entry.
• Added OpenAPI path/query/header/cookie serialization, Parameter content, form-urlencoded and multipart Encoding Object handling.
• Added OpenAPI 3.2 QUERY, in: querystring, and style: cookie support with fail-closed handling for unsupported advanced multipart/custom methods.
• Expanded type, metadata, runtime conformance, CI, and package-consumer verification.
• Made body extensions whole-request-only, preventing strict multipart/form internals from violating operation-derived body types.
• Made response extensions return status-correlated { status, data } pairs and added runtime status validation.
• Fixed tiny-core URL joining when baseUrl already contains a query or fragment.
• Made strict cookie serialization fail closed for compound legacy style: form values; use OpenAPI 3.2 style: cookie, Parameter content, or an operation cookie extension.

0.2.0Copy Anchor Link

• Reworked path typing into a recursive shared-prefix tree.
• Added typed $path() for chain-unsafe OpenAPI templates.
• Added path/query/header/cookie/request-body inference and media-aware request bodies.
• Added typed success/error result utilities and configurable non-2xx behavior.
• Added Fetch transport, middleware, serializers, parsers, and structured HttpError.
• Added ESM/CommonJS declaration routing and package-consumer verification tooling.