Every non-entity GET read became a document from its latest initial
recording, bounded only by writes under related roots, so GET /api/me
read before and after POST /api/orders published the post-write value
as initial state (entities already leave such a type recorded). A
document whose value changed between two of its line's reads across
any recorded write is now recorded as fields-differ; an unchanged
value is still a document.
MCP hints treated OPTIONS and TRACE as non-idempotent writes, so a CORS
preflight tool fell to the destructive default. The RFC 9110 safe
methods (GET, HEAD, OPTIONS, TRACE) are read-only and idempotent.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
