Datex Studio — Runtime Semantics & Execution Model

This skill is a library, not a workflow. The Datex Studio component-creator skills cite the files here via relative paths (e.g. ../datex-studio-runtime/calling-conventions.md). It exists as its own skill so that npx skills / skills.sh install it alongside its consumers — sibling non-skill directories are not copied by those tools.

When this skill is relevant

You're following a Datex Studio component-creator skill and it points you here. Read only the specific reference file the parent skill named — do not preload the whole tree.

If you're asked a runtime question that isn't already scoped to a more specific skill (e.g. "can an action call a function?", "what's the tier rule for datasources?", "what's $utils.isDefined semantics?", "what fields does codeBoxConfig have?"), use the index below to find the right file.

Reference index

runtime-globals.md — Platform-injected globals reference table (every $... global the platform exposes inside flow code, with shape and tier restrictions) and the $utils helper notable semantics (isDefined is collection-aware; isDefinedTrimmed is whitespace-aware).
calling-conventions.md — The three execution tiers (functions / actions / UI components), the caller→callee allow/deny matrix per tier, datasource tier rule, storage tier rule ($db is function-tier only), the generic CRUD action set (crud_create_entity / crud_update_entity / crud_delete_entity in the Utilities package).
control-types.md — controlConfig.type values across forms / editors / hub filters / grid cells; sibling-config-blocks-stay-null rule; declarative-string-slot encoding via cross-link to ../datex-studio-conventions/file-format.md; dynamic mutation via flow code on the $<container>.fields.<id>.control.<prop> surface; detailed codeBox section plus stubs for textBox, numberBox, dateBox, checkBox, selectBox, button, label, text, image, draw, progressBar, matrix.

Notes for skill authors

When a Datex Studio creator skill needs to reference content here: