Create a new attribute

Category this attribute belongs to. Omitted or null means Uncategorized.

Explicit slot within the category. Omitted, the row is appended after the current maximum. Capped at 500000, well below the column's int4 ceiling, so no single write can exhaust the scope's append space.

Icon name for this tag, from the Nebula icon set. Null defers to the icon on the category this attribute belongs to, then to the default tag glyph. Not validated against the icon set — an unknown name falls back the same way.

Tag colour as a hex string, #RGB or #RRGGBB. Null defers to the colour on the category this attribute belongs to, then to a neutral tile. Stored verbatim, so compare against a preset case-insensitively.

Pins the attribute organization-wide, so it always renders first in a tag row and survives truncation. At most 5 per organization; pinning a sixth answers 409 PIN_LIMIT_EXCEEDED. Pinning an already-pinned attribute is a no-op.

The name to show: label when the organization set one (never translated), else the Standard Tag's default name in the Content-Language of the response (resolved from Accept-Language, falling back to en_US, then to standardKey).