fleetd/node/packages/contracts/src/attachment.ts

function connection(input: unknown): Result<Record<string, string>> {
    if (!input || typeof input !== 'object' || Array.isArray(input) || Object.keys(input).length > 8)
        return failure('invalid', 'Invalid runtime attachment data');
    const fields: Record<string, string> = {};
    for (const [key, value] of Object.entries(input)) {
        const field = check.text(64)(key), content = check.text(4096)(value);
        if (!field.ok)
            return field;
        if (!content.ok)
            return content;
        Object.defineProperty(fields, key, { value: content.value, enumerable: true, writable: true, configurable: true });
    }
    return success(fields);
}

attachment = check.object({ runtime: check.name, sessionId: check.text(200), workspace: check.text(4096), connection })