Create a landing page display

Required beside every supplied tracking_config, including new page creation. Version 1 declares that the writer preserves same-name channel bindings, initialization markers, legacy_document_only, legacy_document_server_only, parameter_variants and additional event metadata. It is a request capability, separate from tracking_config.schema_version. Missing or unsupported versions return 409; update the client and reload the current editor response before retrying. Omit for legacy-only writes.

Required with tracking_config for an existing owner. Use the current editor response revision and tracking_config_write_version; stale edits or unsupported writers are rejected with 409. Asset and trigger changes are atomic.

Complete authored HTML source for HTML Mode. A non-whitespace value is authoritative and replaces all legacy html_code, css_code, js_code and additional_head_code inputs for rendering. Null, empty and whitespace-only values on legacy records use the legacy source. Reading and validation do not persist migration. Existing clients may continue sending html_code, css_code and js_code instead of html_document, including after a previous version used unified source. Send all three fields for a complete legacy snapshot, using empty strings for intentionally blank sections. Include additional_head_code when needed; omitted snapshot sections are empty. Legacy snapshots are automatically assembled into a document on every HTML Mode content save. Settings-only version writes preserve the preceding source. Clearing an already migrated document returns 422; save <!doctype html><html><head></head><body></body></html> for a deliberately blank page. Platform runtime, tokens, analytics and public data are injected only when rendered and must not be included in this field. External scripts, stylesheets, import maps and document attributes are retained. Dependencies still require directive-specific permission in csp_policy. CSP meta tags are retained in source but ignored at execution with a validation warning.

Public runtime capability present only with a saved tracking_config, including an explicitly empty configuration. Absent for unmigrated displays and editor-only resolved defaults. A compatible runtime copies this value into checkout metadata, then waits for the accepted order's same-named acknowledgment before suppressing direct native server sends.

Authoring revision from the editor response. Send it with tracking_config when creating the next display version; stale edits are rejected with 409. Asset and trigger changes are atomic. Public runtime responses may return null; do not use those responses as an editing revision.

An actionable compatibility-resolution problem. An unresolved owner remains unmigrated.

Complete authored HTML source for HTML Mode. A non-whitespace value is authoritative and replaces all legacy html_code, css_code, js_code and additional_head_code inputs for rendering. Null, empty and whitespace-only values on legacy records use the legacy source. Reading and validation do not persist migration. Existing clients may continue sending html_code, css_code and js_code instead of html_document, including after a previous version used unified source. Send all three fields for a complete legacy snapshot, using empty strings for intentionally blank sections. Include additional_head_code when needed; omitted snapshot sections are empty. Legacy snapshots are automatically assembled into a document on every HTML Mode content save. Settings-only version writes preserve the preceding source. Clearing an already migrated document returns 422; save <!doctype html><html><head></head><body></body></html> for a deliberately blank page. Platform runtime, tokens, analytics and public data are injected only when rendered and must not be included in this field. External scripts, stylesheets, import maps and document attributes are retained. Dependencies still require directive-specific permission in csp_policy. CSP meta tags are retained in source but ignored at execution with a validation warning.