forked from 1b-agent/opencadstudio-upstream
A single self-contained reference for external client developers: conventions and units, the four transports, session/state, the full symbolic error catalogue with the retryable set, the complete operation catalogue (documents and identity, entity create/modify/query with where filters, block lifecycle, layouts and plotting, metadata and sysvars, groups and selection sets, embedded vs linked images, commands and batches), the REST endpoint table, worked examples and the versioning policy. Names only open formats and protocols.