tmux_schema:field_metadata/0

Generated field contract. stable is a versioned portable identity; wire is the JSON key. required controls construction and nullable permits known absence. format is present only for directly observed tmux fields; derived fields omit it. capture_codec identifies an admitted batched source encoding; its absence selects isolated reads for that entity. minimum tightens an integer field's lower bound. Field names themselves are the keys returned by fields/1, not this map's wire or stable values.