Add or remove ids on one of a character's multi-link fields

Name of the element.

Any kind of details about the element.

The top level category to which the element belongs.

The sub level category through which the element is further classified.

URL to an image representing the element.

The character's visible physical features and body attributes.

The character's mindset, emotional tone, and style of thinking.

History, upbringing, or formative experiences of the character.

Core desires, goals, or values that drive the character's choices and behavior.

Brief summary of the character's current condition, role, or predicament.

The character's approximate or exact height, in the world's length unit (World length_unit).

The character's approximate or exact weight, in the world's mass unit (World mass_unit).

Moment of birth, expressed in the world's TIME units.

Ability to attract, inspire, and influence others.

Capacity to dominate, intimidate, or apply force to shape outcomes.

Skill in planning, understanding, and managing complex systems or situations.

Willingness to empathize with and care for others.

Ability to generate novel ideas, perspectives, or solutions.

Readiness to face danger, risk, or adversity.

Progression rank of the character in a game system.

Total health available to the character.

Physical force and carrying capacity.

Agility, coordination, and reflexes.

Endurance and resistance to strain.

Reasoning, memory, and learning.

Intuition, awareness, and judgment.

Persuasiveness and personal magnetism.

Location where the character was born. A Location's id.

The character's present physical location. A Location's id.

The world change sequence at this element's last write.

The world membership that created this element, or null when the world's owner did.

The world membership that last changed this element, or null when the world's owner (or the server) did, or no write has touched it since doors were recorded.

The door of the last change: seat (an agent seat), mcp (the MCP server), declared (the request sent an X-OW-Agent header), api, v1, sync (the mobile app's sync) or server (the server, on its own behalf). The first three mean an agent made it. Null: no write since doors were recorded.

Present, and true, only on an element this reader knows of but does not see whole: a guest or player reaches it only because its own Character's sheet links to it (one step out). Such a row keeps id, type, name, description, supertype, subtype, image_url, created_at, updated_at and change_seq, and its type's public fields (for a character: physicality, height, weight, species, reputation; a link among them still names only what the reader sees); every other field reads as unset (text "", numbers and single links null, multi links [], created_by, changed_by and changed_via null, no extension fields), its files are 404, and search matches only what it keeps. Absent: the element is whole. Any other grant (it names the reader's Character, the reader knows it, it is on the roster, the reader made it) makes it whole; a hidden element is never even a stub, whatever its public fields. Read-only: a write carrying known_of is refused (known_of_not_writable).