Gated Capabilities

wf:variable, wf:rive, and wf:animate-rive are authorable. Call data_interactions_tool action guide for their shapes. They are not in the table below.

Two different reasons are collapsed into one behavior, and the distinction matters for what you tell the user.

Not in the default capability set

Registered in the Designer, and refused by the write path for every caller.

Fragment for triggers and actions: is not in the Designer's default capability set

The MCP tool layer emits its own variant of that message before the guard runs, so the exact wording differs by surface. See rejects-index.md.

Navbar and dropdown, for when they land

Recorded here so this file stays useful at GA rather than being rewritten. Do not author against it yet.

Both are standalone. Their roles are open and close: each supplied timeline needs one of the two and they must be unique, but the guard does not require the pair, so a single open timeline is valid. Do not add a second timeline purely to satisfy validation.

The playback editor is hidden, but the panel still writes control: 'play' and findGroupedTriggerControlError requires it once the interaction has two or more grouped timelines. They are deliberately excluded from NO_PLAYBACK_CONTROL_TYPES for exactly that reason: rejecting the field would make the two guards contradict each other.

Send a target. The panel supplies one through ComponentTriggerTarget, which writes a wf:inst target for the navbar or dropdown instance. Validation does not demand it, but bindTrigger only resolves elements when a target is present, so a targetless navbar interaction saves and never fires. This is the same trap as mouse-move, described in trigger-mouse-move.md.

Conditions

CONDITIONS_DEFAULT_ON is false, so findConditionsCapabilityError refuses trigger-level conditionalLogic outright and wins over any deeper outcome-shape message — in the host.

Through MCP the argument schema runs first, so an incomplete conditionalLogic never reaches the capability check. Measured: config: {conditionalLogic: {conditions: []}} returns triggers.0.config.conditionalLogic.ifTrue: Required. Do not read that as “supply ifTrue and this will work” — it is a shape error in front of a closed door, and completing the shape only moves you to the capability refusal. The capability is off either way.

This is only about trigger conditionalLogic. Interaction-level conditionalPlayback is a separate field and is authorable — see conditional-playback.md. Do not conflate them.

No Designer schema at all

Runtime-only trigger keys with no addTriggerSchema registration. Unlike the gated set, there is no plan that makes these authorable.

They are deliberately kept out of the default-on set so the DE, MCP, and code-views lanes all refuse to author them.

Why the generated table cannot tell these apart

capabilities.generated.md marks both groups simply as not authorable. The set that distinguishes them (FLAG_GATED_TRIGGER_KEYS) is private to designerInvariants.ts, and it was not exported merely to improve a docs table. That is why this file exists.