Changelog

Changes relative to the 2026-08-12 release.

Added#

• Migration guidance for consumers that resolve or cache schemas by $id.
• A closed HTTP problem-type registry, WebSocket error-code registry, discovery declarations for supported errors, and a machine-readable HTTP problem schema.
• Requirements that implementation-owned schema $id values equal their advertised URLs and use origins controlled by the implementation.

Changed#

• Canonical JSON Schema identifiers now use the production specification origin https://spec.pmh.codes/ instead of the reserved example origin.
• Protocol objects and implementation-owned schemas now reject undeclared object properties throughout their complete referenced schema graphs.
• Implementation-owned schemas use JSON Schema Draft 2020-12 and must be retrievable without resource credentials.
• Shared-token authentication scheme matching is explicitly case-insensitive as required by HTTP.

Deprecated#

• None.

Removed#

• Canonical identifiers under https://spec.rostack.example/.
• Implementation-defined HTTP problem types and WebSocket error codes.
• Implementation-owned schema identifiers under the specification origin.

Fixed#

• Canonical schema identifiers now resolve under the project documentation domain.
• Error behavior is now finite and discoverable before an operation is attempted.