Add, edit, and delete Figma component properties (TEXT, BOOLEAN, INSTANCE_SWAP, VARIANT) on a COMPONENT or COMPONENT_SET, and instantiate a component then set its instance properties. Use when authoring or wiring up a component's API in Figma — triggers: 'add a component property', 'add a boolean prop to this component', 'make this text a component property', 'add an instance-swap slot', 'create a variant property', 'rename/delete a component property', 'place an instance of this component', 'i…
Add, edit, and delete Figma component properties (TEXT, BOOLEAN, INSTANCE_SWAP, VARIANT) on a COMPONENT or COMPONENT_SET, and instantiate a component then set its instance properties.
Use when authoring or wiring up a component's API in Figma — triggers: 'add a component property', 'add a boolean prop to this component', 'make this text a component property', 'add an instance-swap slot', 'create a variant property', 'rename/delete a component property', 'place an instance of this component', 'instantiate this component and set its label/state', 'set properties on this instance'.
Properties must be added to the parent COMPONENT_SET, not individual variants.
NOT covered by the native MCP's read-only get_design_context/get_metadata.
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SKILL.md
component-properties-figma — define a component's API + instantiate it
Two related jobs:
Author the component's property API — add/edit/delete TEXT, BOOLEAN, INSTANCE_SWAP, and
VARIANT properties so the component exposes the right knobs (the Figma equivalent of a React component's props).
Use the component — create an instance and set its properties (label text, boolean toggles,
variant selection, swapped sub-instances).
Skill boundaries
use_figma rules — load the official figma-use skill first; it is the full Figma Plugin API reference. Essentials these scripts rely on: plain JS with top-level await + return (no IIFE, no figma.closePlugin(); console.log is not returned), inputs inlined as const at the top of each script, colors in 0–1 range, load fonts before any text op, await figma.getNodeByIdAsync(...), and atomic errors (a failed script applies nothing — read the error, fix, retry).
Reading a component's existing property definitions / state machine →
use analyze-component-set-figma or deep-component-figma.
These are design-system authoring writes the native MCP's getdesigncontext /
get_metadata (read-only) do not cover.
Property types
Type
What it controls
defaultValue
Notes
TEXT
A text-layer string override
"Label"
Bind in UI to a text node's characters
BOOLEAN
Show/hide a layer
true/false
Bind to a layer's visibility
INSTANCE_SWAP
Which sub-component fills a slot
a component key
Pass preferredValues to populate the picker
VARIANT
A variant axis (Size, State…)
one option string
Only meaningful on a COMPONENT_SET
Workflow — authoring properties
Target the COMPONENT_SET (or standalone COMPONENT). You cannot add properties to an
individual variant — the script errors and tells you to use the parent set.
Add with [scripts/add-property.js](scripts/add-property.js) (use_figma,
skillNames: "component-properties-figma"). Set NODEID, PROPERTYNAME, PROPERTYTYPE, DEFAULTVALUE. addComponentProperty returns a name with a #id suffix — capture it.
Edit / delete by reusing the same script's editComponentProperty(name, {...}) /
deleteComponentProperty(name) calls (commented variants are in the script). Use the suffixed name returned at creation for edits/deletes of non-variant props.
Verify by re-reading node.componentPropertyDefinitions (the script returns it).
Workflow — instantiate + set instance properties
Get a component identity. A published library componentKey (preferred) and/or a local
nodeId. Pass both when you have them — the script tries the library import first, then the local node.
Run [scripts/instantiate-and-set.js](scripts/instantiate-and-set.js). Set COMPONENT_KEY /
Set properties on an existing instance with the same script's setProperties path — it loads
the main component, then matches plain names andName#id-suffixed names automatically.
Notes
Instance property keys carry #nodeId suffixes for TEXT/BOOLEAN/INSTANCE_SWAP
("Label#12:3"); VARIANT props use the bare name. The instantiate script resolves both, so you can pass the human name (Label) and it finds the suffixed key.
Direct text editing of an instance's text layer fails silently — always go through
setProperties / instance properties, never set .characters on a nested instance text node.
componentKey only works for published components. For local/unpublished ones use nodeId.
