diff --git a/.jazzy.yaml b/.jazzy.yaml
index c096dabcc..5d062f35e 100644
--- a/.jazzy.yaml
+++ b/.jazzy.yaml
@@ -13,6 +13,8 @@ documentation: rule_docs/*.md
 hide_unlisted_documentation: true
 custom_categories_unlisted_prefix: ''
 exclude:
+  # TODO: Document extensions
+  - Source/SwiftLintFramework/Extensions/*.swift
   - Source/SwiftLintFramework/Rules/**/*.swift
 custom_categories:
   - name: Rules
diff --git a/Source/SwiftLintFramework/Extensions/Array+SwiftLint.swift b/Source/SwiftLintFramework/Extensions/Array+SwiftLint.swift
index 64ed8dae3..9cb038d9b 100644
--- a/Source/SwiftLintFramework/Extensions/Array+SwiftLint.swift
+++ b/Source/SwiftLintFramework/Extensions/Array+SwiftLint.swift
@@ -1,6 +1,6 @@
 import Dispatch
 
-extension Array where Element: Equatable {
+public extension Array where Element: Equatable {
     /// The elements in this array, discarding duplicates after the first one.
     /// Order-preserving.
     var unique: [Element] {
@@ -12,7 +12,7 @@ extension Array where Element: Equatable {
     }
 }
 
-extension Array where Element: Hashable {
+public extension Array where Element: Hashable {
     /// Produces an array containing the passed `obj` value.
     /// If `obj` is an array already, return it.
     /// If `obj` is a set, copy its elements to a new array.
@@ -33,7 +33,7 @@ extension Array where Element: Hashable {
     }
 }
 
-extension Array {
+public extension Array {
     /// Produces an array containing the passed `obj` value.
     /// If `obj` is an array already, return it.
     /// If `obj` is a value of type `Element`, return a single-item array containing it.
@@ -67,8 +67,7 @@ extension Array {
     ///
     /// - returns: The elements failing the `belongsInSecondPartition` test, followed by the elements passing the
     ///            `belongsInSecondPartition` test.
-    @_spi(TestHelper)
-    public func partitioned(by belongsInSecondPartition: (Element) throws -> Bool) rethrows ->
+    func partitioned(by belongsInSecondPartition: (Element) throws -> Bool) rethrows ->
         (first: ArraySlice<Element>, second: ArraySlice<Element>) {
             var copy = self
             let pivot = try copy.partition(by: belongsInSecondPartition)
@@ -80,8 +79,7 @@ extension Array {
     /// - parameter transform: The transformation to apply to each element.
     ///
     /// - returns: The result of applying `transform` on every element and flattening the results.
-    @_spi(TestHelper)
-    public func parallelFlatMap<T>(transform: (Element) -> [T]) -> [T] {
+    func parallelFlatMap<T>(transform: (Element) -> [T]) -> [T] {
         return parallelMap(transform: transform).flatMap { $0 }
     }
 
@@ -110,10 +108,9 @@ extension Array {
     }
 }
 
-extension Collection {
+public extension Collection {
     /// Whether this collection has one or more element.
-    @_spi(TestHelper)
-    public var isNotEmpty: Bool {
+    var isNotEmpty: Bool {
         return !isEmpty
     }
 
diff --git a/Source/SwiftLintFramework/Extensions/ByteCount+SwiftSyntax.swift b/Source/SwiftLintFramework/Extensions/ByteCount+SwiftSyntax.swift
index 0b7d950d7..d027c5a2b 100644
--- a/Source/SwiftLintFramework/Extensions/ByteCount+SwiftSyntax.swift
+++ b/Source/SwiftLintFramework/Extensions/ByteCount+SwiftSyntax.swift
@@ -1,7 +1,7 @@
 import SourceKittenFramework
 import SwiftSyntax
 
-extension ByteCount {
+public extension ByteCount {
     /// Converts a SwiftSyntax `AbsolutePosition` to a SourceKitten `ByteCount`.
     ///
     /// - parameter position: The SwiftSyntax position to convert.
diff --git a/Source/SwiftLintFramework/Extensions/Dictionary+SwiftLint.swift b/Source/SwiftLintFramework/Extensions/Dictionary+SwiftLint.swift
index e753e7335..dad6606e6 100644
--- a/Source/SwiftLintFramework/Extensions/Dictionary+SwiftLint.swift
+++ b/Source/SwiftLintFramework/Extensions/Dictionary+SwiftLint.swift
@@ -21,7 +21,7 @@ public struct SourceKittenDictionary {
     /// Creates a SourceKitten dictionary given a `Dictionary<String, SourceKitRepresentable>` input.
     ///
     /// - parameter value: The input dictionary/
-    init(_ value: [String: SourceKitRepresentable]) {
+    public init(_ value: [String: SourceKitRepresentable]) {
         self.value = value
 
         let substructure = value["key.substructure"] as? [SourceKitRepresentable] ?? []
@@ -37,123 +37,123 @@ public struct SourceKittenDictionary {
     }
 
     /// Body length
-    var bodyLength: ByteCount? {
+    public var bodyLength: ByteCount? {
         return (value["key.bodylength"] as? Int64).map(ByteCount.init)
     }
 
     /// Body offset.
-    var bodyOffset: ByteCount? {
+    public var bodyOffset: ByteCount? {
         return (value["key.bodyoffset"] as? Int64).map(ByteCount.init)
     }
 
     /// Body byte range.
-    var bodyByteRange: ByteRange? {
+    public var bodyByteRange: ByteRange? {
         guard let offset = bodyOffset, let length = bodyLength else { return nil }
         return ByteRange(location: offset, length: length)
     }
 
     /// Kind.
-    var kind: String? {
+    public var kind: String? {
         return value["key.kind"] as? String
     }
 
     /// Length.
-    var length: ByteCount? {
+    public var length: ByteCount? {
         return (value["key.length"] as? Int64).map(ByteCount.init)
     }
     /// Name.
-    var name: String? {
+    public var name: String? {
         return value["key.name"] as? String
     }
 
     /// Name length.
-    var nameLength: ByteCount? {
+    public var nameLength: ByteCount? {
         return (value["key.namelength"] as? Int64).map(ByteCount.init)
     }
 
     /// Name offset.
-    var nameOffset: ByteCount? {
+    public var nameOffset: ByteCount? {
         return (value["key.nameoffset"] as? Int64).map(ByteCount.init)
     }
 
     /// Byte range of name.
-    var nameByteRange: ByteRange? {
+    public var nameByteRange: ByteRange? {
         guard let offset = nameOffset, let length = nameLength else { return nil }
         return ByteRange(location: offset, length: length)
     }
 
     /// Offset.
-    var offset: ByteCount? {
+    public var offset: ByteCount? {
         return (value["key.offset"] as? Int64).map(ByteCount.init)
     }
 
     /// Returns byte range starting from `offset` with `length` bytes
-    var byteRange: ByteRange? {
+    public var byteRange: ByteRange? {
         guard let offset, let length else { return nil }
         return ByteRange(location: offset, length: length)
     }
 
     /// Setter accessibility.
-    var setterAccessibility: String? {
+    public var setterAccessibility: String? {
         return value["key.setter_accessibility"] as? String
     }
 
     /// Type name.
-    var typeName: String? {
+    public var typeName: String? {
         return value["key.typename"] as? String
     }
 
     /// Documentation length.
-    var docLength: ByteCount? {
+    public var docLength: ByteCount? {
         return (value["key.doclength"] as? Int64).flatMap(ByteCount.init)
     }
 
     /// The attribute for this dictionary, as returned by SourceKit.
-    var attribute: String? {
+    public var attribute: String? {
         return value["key.attribute"] as? String
     }
 
     /// Module name in `@import` expressions.
-    var moduleName: String? {
+    public var moduleName: String? {
         return value["key.modulename"] as? String
     }
 
     /// The line number for this declaration.
-    var line: Int64? {
+    public var line: Int64? {
         return value["key.line"] as? Int64
     }
 
     /// The column number for this declaration.
-    var column: Int64? {
+    public var column: Int64? {
         return value["key.column"] as? Int64
     }
 
     /// The `SwiftDeclarationAttributeKind` values associated with this dictionary.
-    var enclosedSwiftAttributes: [SwiftDeclarationAttributeKind] {
+    public var enclosedSwiftAttributes: [SwiftDeclarationAttributeKind] {
         return swiftAttributes.compactMap { $0.attribute }
             .compactMap(SwiftDeclarationAttributeKind.init(rawValue:))
     }
 
     /// The fully preserved SourceKitten dictionaries for all the attributes associated with this dictionary.
-    var swiftAttributes: [SourceKittenDictionary] {
+    public var swiftAttributes: [SourceKittenDictionary] {
         let array = value["key.attributes"] as? [SourceKitRepresentable] ?? []
         return array.compactMap { $0 as? [String: SourceKitRepresentable] }
             .map(Self.init)
     }
 
-    var elements: [SourceKittenDictionary] {
+    public var elements: [SourceKittenDictionary] {
         let elements = value["key.elements"] as? [SourceKitRepresentable] ?? []
         return elements.compactMap { $0 as? [String: SourceKitRepresentable] }
         .map(Self.init)
     }
 
-    var entities: [SourceKittenDictionary] {
+    public var entities: [SourceKittenDictionary] {
         let entities = value["key.entities"] as? [SourceKitRepresentable] ?? []
         return entities.compactMap { $0 as? [String: SourceKitRepresentable] }
             .map(Self.init)
     }
 
-    var enclosedVarParameters: [SourceKittenDictionary] {
+    public var enclosedVarParameters: [SourceKittenDictionary] {
         return substructure.flatMap { subDict -> [SourceKittenDictionary] in
             if subDict.declarationKind == .varParameter {
                 return [subDict]
@@ -166,7 +166,7 @@ public struct SourceKittenDictionary {
         }
     }
 
-    var enclosedArguments: [SourceKittenDictionary] {
+    public var enclosedArguments: [SourceKittenDictionary] {
         return substructure.flatMap { subDict -> [SourceKittenDictionary] in
             guard subDict.expressionKind == .argument else {
                 return []
@@ -176,7 +176,7 @@ public struct SourceKittenDictionary {
         }
     }
 
-    var inheritedTypes: [String] {
+    public var inheritedTypes: [String] {
         let array = value["key.inheritedtypes"] as? [SourceKitRepresentable] ?? []
         return array.compactMap { ($0 as? [String: String]).flatMap { $0["key.name"] } }
     }
@@ -189,7 +189,7 @@ extension SourceKittenDictionary {
     /// - parameter traverseBlock: block that will be called for each substructure in the dictionary.
     ///
     /// - returns: The list of substructure dictionaries with updated values from the traverse block.
-    func traverseDepthFirst<T>(traverseBlock: (SourceKittenDictionary) -> [T]?) -> [T] {
+    public func traverseDepthFirst<T>(traverseBlock: (SourceKittenDictionary) -> [T]?) -> [T] {
         var result: [T] = []
         traverseDepthFirst(collectingValuesInto: &result, traverseBlock: traverseBlock)
         return result
@@ -212,7 +212,7 @@ extension SourceKittenDictionary {
     /// - parameter traverseBlock: block that will be called for each entity in the dictionary.
     ///
     /// - returns: The list of entity dictionaries with updated values from the traverse block.
-    func traverseEntitiesDepthFirst<T>(traverseBlock: (SourceKittenDictionary) -> T?) -> [T] {
+    public func traverseEntitiesDepthFirst<T>(traverseBlock: (SourceKittenDictionary) -> T?) -> [T] {
         var result: [T] = []
         traverseEntitiesDepthFirst(collectingValuesInto: &result, traverseBlock: traverseBlock)
         return result
@@ -230,7 +230,7 @@ extension SourceKittenDictionary {
     }
 }
 
-extension Dictionary where Key == Example {
+public extension Dictionary where Key == Example {
     /// Returns a dictionary with SwiftLint violation markers (↓) removed from keys.
     ///
     /// - returns: A new `Dictionary`.
diff --git a/Source/SwiftLintFramework/Extensions/NSRegularExpression+SwiftLint.swift b/Source/SwiftLintFramework/Extensions/NSRegularExpression+SwiftLint.swift
index 4fb73efb8..14a833038 100644
--- a/Source/SwiftLintFramework/Extensions/NSRegularExpression+SwiftLint.swift
+++ b/Source/SwiftLintFramework/Extensions/NSRegularExpression+SwiftLint.swift
@@ -14,8 +14,8 @@ private struct RegexCacheKey: Hashable {
     }
 }
 
-extension NSRegularExpression {
-    internal static func cached(pattern: String, options: Options? = nil) throws -> NSRegularExpression {
+public extension NSRegularExpression {
+    static func cached(pattern: String, options: Options? = nil) throws -> NSRegularExpression {
         let options = options ?? [.anchorsMatchLines, .dotMatchesLineSeparators]
         let key = RegexCacheKey(pattern: pattern, options: options)
         regexCacheLock.lock()
@@ -29,19 +29,19 @@ extension NSRegularExpression {
         return result
     }
 
-    internal func matches(in stringView: StringView,
-                          options: NSRegularExpression.MatchingOptions = []) -> [NSTextCheckingResult] {
+    func matches(in stringView: StringView,
+                 options: NSRegularExpression.MatchingOptions = []) -> [NSTextCheckingResult] {
         return matches(in: stringView.string, options: options, range: stringView.range)
     }
 
-    internal func matches(in stringView: StringView,
-                          options: NSRegularExpression.MatchingOptions = [],
-                          range: NSRange) -> [NSTextCheckingResult] {
+    func matches(in stringView: StringView,
+                 options: NSRegularExpression.MatchingOptions = [],
+                 range: NSRange) -> [NSTextCheckingResult] {
         return matches(in: stringView.string, options: options, range: range)
     }
 
-    internal func matches(in file: SwiftLintFile,
-                          options: NSRegularExpression.MatchingOptions = []) -> [NSTextCheckingResult] {
+    func matches(in file: SwiftLintFile,
+                 options: NSRegularExpression.MatchingOptions = []) -> [NSTextCheckingResult] {
         return matches(in: file.stringView.string, options: options, range: file.stringView.range)
     }
 }
diff --git a/Source/SwiftLintFramework/Extensions/RandomAccessCollection+Swiftlint.swift b/Source/SwiftLintFramework/Extensions/RandomAccessCollection+Swiftlint.swift
index 7e7126771..1678cb8f3 100644
--- a/Source/SwiftLintFramework/Extensions/RandomAccessCollection+Swiftlint.swift
+++ b/Source/SwiftLintFramework/Extensions/RandomAccessCollection+Swiftlint.swift
@@ -1,4 +1,4 @@
-extension RandomAccessCollection where Index == Int {
+public extension RandomAccessCollection where Index == Int {
     /// Returns the first index in which an element of the collection satisfies the given predicate.
     /// The collection assumed to be sorted. If collection is not have sorted values the result is undefined.
     ///
diff --git a/Source/SwiftLintFramework/Extensions/Request+SwiftLint.swift b/Source/SwiftLintFramework/Extensions/Request+SwiftLint.swift
index 7f0e9e6ed..1ecf370f7 100644
--- a/Source/SwiftLintFramework/Extensions/Request+SwiftLint.swift
+++ b/Source/SwiftLintFramework/Extensions/Request+SwiftLint.swift
@@ -1,7 +1,7 @@
 import Foundation
 import SourceKittenFramework
 
-extension Request {
+public extension Request {
     static let disableSourceKit = ProcessInfo.processInfo.environment["SWIFTLINT_DISABLE_SOURCEKIT"] != nil
 
     func sendIfNotDisabled() throws -> [String: SourceKitRepresentable] {
diff --git a/Source/SwiftLintFramework/Extensions/SourceKittenDictionary+Swiftlint.swift b/Source/SwiftLintFramework/Extensions/SourceKittenDictionary+Swiftlint.swift
index c430ad277..dff42f5f2 100644
--- a/Source/SwiftLintFramework/Extensions/SourceKittenDictionary+Swiftlint.swift
+++ b/Source/SwiftLintFramework/Extensions/SourceKittenDictionary+Swiftlint.swift
@@ -1,13 +1,13 @@
 import SourceKittenFramework
 
-extension SourceKittenDictionary {
+public extension SourceKittenDictionary {
     /// Returns array of tuples containing "key.kind" and "byteRange" from Structure
     /// that contains the byte offset. Returns all kinds if no parameter specified.
     ///
     /// - parameter byteOffset: Int?
     ///
     /// - returns: The kinds and byte ranges.
-    internal func kinds(forByteOffset byteOffset: ByteCount? = nil)
+    func kinds(forByteOffset byteOffset: ByteCount? = nil)
         -> [(kind: String, byteRange: ByteRange)] {
         var results = [(kind: String, byteRange: ByteRange)]()
 
@@ -27,7 +27,7 @@ extension SourceKittenDictionary {
         return results
     }
 
-    internal func structures(forByteOffset byteOffset: ByteCount) -> [SourceKittenDictionary] {
+    func structures(forByteOffset byteOffset: ByteCount) -> [SourceKittenDictionary] {
         var results = [SourceKittenDictionary]()
 
         func parse(_ dictionary: SourceKittenDictionary) {
diff --git a/Source/SwiftLintFramework/Extensions/SourceRange+SwiftLint.swift b/Source/SwiftLintFramework/Extensions/SourceRange+SwiftLint.swift
index 6e07af717..5c099e82d 100644
--- a/Source/SwiftLintFramework/Extensions/SourceRange+SwiftLint.swift
+++ b/Source/SwiftLintFramework/Extensions/SourceRange+SwiftLint.swift
@@ -1,6 +1,6 @@
 import SwiftSyntax
 
-extension SourceRange {
+public extension SourceRange {
     /// Check if a position is contained within this range.
     ///
     /// - parameter position:          The position to check.
diff --git a/Source/SwiftLintFramework/Extensions/String+SwiftLint.swift b/Source/SwiftLintFramework/Extensions/String+SwiftLint.swift
index 038798e01..be6ac71ab 100644
--- a/Source/SwiftLintFramework/Extensions/String+SwiftLint.swift
+++ b/Source/SwiftLintFramework/Extensions/String+SwiftLint.swift
@@ -1,8 +1,8 @@
 import Foundation
 import SourceKittenFramework
 
-extension String {
-    internal func hasTrailingWhitespace() -> Bool {
+public extension String {
+    func hasTrailingWhitespace() -> Bool {
         if isEmpty {
             return false
         }
@@ -14,22 +14,14 @@ extension String {
         return false
     }
 
-    internal func isUppercase() -> Bool {
+    func isUppercase() -> Bool {
         return self == uppercased()
     }
 
-    internal func isLowercase() -> Bool {
+    func isLowercase() -> Bool {
         return self == lowercased()
     }
 
-    internal func nameStrippingLeadingUnderscoreIfPrivate(_ dict: SourceKittenDictionary) -> String {
-        if let acl = dict.accessibility,
-            acl.isPrivate && first == "_" {
-            return String(self[index(after: startIndex)...])
-        }
-        return self
-    }
-
     private subscript (range: Range<Int>) -> String {
         let nsrange = NSRange(location: range.lowerBound,
                               length: range.upperBound - range.lowerBound)
@@ -39,21 +31,21 @@ extension String {
         queuedFatalError("invalid range")
     }
 
-    internal func substring(from: Int, length: Int? = nil) -> String {
+    func substring(from: Int, length: Int? = nil) -> String {
         if let length {
             return self[from..<from + length]
         }
         return String(self[index(startIndex, offsetBy: from, limitedBy: endIndex)!...])
     }
 
-    internal func lastIndex(of search: String) -> Int? {
+    func lastIndex(of search: String) -> Int? {
         if let range = range(of: search, options: [.literal, .backwards]) {
             return distance(from: startIndex, to: range.lowerBound)
         }
         return nil
     }
 
-    internal func nsrangeToIndexRange(_ nsrange: NSRange) -> Range<Index>? {
+    func nsrangeToIndexRange(_ nsrange: NSRange) -> Range<Index>? {
         guard nsrange.location != NSNotFound else {
             return nil
         }
@@ -70,18 +62,18 @@ extension String {
         return fromIndex..<toIndex
     }
 
-    internal var fullNSRange: NSRange {
+    var fullNSRange: NSRange {
         return NSRange(location: 0, length: utf16.count)
     }
 
     /// Returns a new string, converting the path to a canonical absolute path.
     ///
     /// - returns: A new `String`.
-    public func absolutePathStandardized() -> String {
+    func absolutePathStandardized() -> String {
         return bridge().absolutePathRepresentation().bridge().standardizingPath
     }
 
-    internal var isFile: Bool {
+    var isFile: Bool {
         if self.isEmpty {
             return false
         }
@@ -95,14 +87,14 @@ extension String {
     /// Count the number of occurrences of the given character in `self`
     /// - Parameter character: Character to count
     /// - Returns: Number of times `character` occurs in `self`
-    public func countOccurrences(of character: Character) -> Int {
+    func countOccurrences(of character: Character) -> Int {
         return self.reduce(0, {
             $1 == character ? $0 + 1 : $0
         })
     }
 
     /// If self is a path, this method can be used to get a path expression relative to a root directory
-    public func path(relativeTo rootDirectory: String) -> String {
+    func path(relativeTo rootDirectory: String) -> String {
         let normalizedRootDir = rootDirectory.bridge().standardizingPath
         let normalizedSelf = bridge().standardizingPath
         if normalizedRootDir.isEmpty {
@@ -123,7 +115,7 @@ extension String {
         }
     }
 
-    internal func deletingPrefix(_ prefix: String) -> String {
+    func deletingPrefix(_ prefix: String) -> String {
         guard hasPrefix(prefix) else { return self }
         return String(dropFirst(prefix.count))
     }
diff --git a/Source/SwiftLintFramework/Extensions/StringView+SwiftLint.swift b/Source/SwiftLintFramework/Extensions/StringView+SwiftLint.swift
index 46d6d5272..bf1ded721 100644
--- a/Source/SwiftLintFramework/Extensions/StringView+SwiftLint.swift
+++ b/Source/SwiftLintFramework/Extensions/StringView+SwiftLint.swift
@@ -1,6 +1,6 @@
 import SourceKittenFramework
 
-extension StringView {
+public extension StringView {
     /// Converts a line and column position in a code snippet to a byte offset.
     /// - Parameters:
     ///   - line: Line in code snippet
diff --git a/Source/SwiftLintFramework/Extensions/StringView+SwiftSyntax.swift b/Source/SwiftLintFramework/Extensions/StringView+SwiftSyntax.swift
index d869ec068..efee3d87d 100644
--- a/Source/SwiftLintFramework/Extensions/StringView+SwiftSyntax.swift
+++ b/Source/SwiftLintFramework/Extensions/StringView+SwiftSyntax.swift
@@ -2,7 +2,7 @@ import Foundation
 import SourceKittenFramework
 import SwiftSyntax
 
-extension StringView {
+public extension StringView {
     /// Converts two absolute positions from SwiftSyntax to a valid `NSRange` if possible.
     ///
     /// - parameter start: Starting position.
diff --git a/Source/SwiftLintFramework/Extensions/SwiftDeclarationAttributeKind+Swiftlint.swift b/Source/SwiftLintFramework/Extensions/SwiftDeclarationAttributeKind+Swiftlint.swift
index 3571092e4..ace97f9a2 100644
--- a/Source/SwiftLintFramework/Extensions/SwiftDeclarationAttributeKind+Swiftlint.swift
+++ b/Source/SwiftLintFramework/Extensions/SwiftDeclarationAttributeKind+Swiftlint.swift
@@ -1,6 +1,6 @@
 import SourceKittenFramework
 
-extension SwiftDeclarationAttributeKind {
+public extension SwiftDeclarationAttributeKind {
     static var attributesRequiringFoundation: Set<SwiftDeclarationAttributeKind> {
         return [
             .objc,
@@ -24,7 +24,7 @@ extension SwiftDeclarationAttributeKind {
         case `dynamic`
         case atPrefixed
 
-        init?(rawAttribute: String) {
+        public init?(rawAttribute: String) {
             let allModifierGroups: Set<SwiftDeclarationAttributeKind.ModifierGroup> = [
                 .acl, .setterACL, .mutators, .override, .owned, .atPrefixed, .dynamic, .final, .typeMethods,
                 .required, .convenience, .lazy
@@ -40,7 +40,7 @@ extension SwiftDeclarationAttributeKind {
             }
         }
 
-        var swiftDeclarationAttributeKinds: Set<SwiftDeclarationAttributeKind> {
+        public var swiftDeclarationAttributeKinds: Set<SwiftDeclarationAttributeKind> {
             switch self {
             case .acl:
                 return [
@@ -94,7 +94,7 @@ extension SwiftDeclarationAttributeKind {
             }
         }
 
-        var debugDescription: String {
+        public var debugDescription: String {
             return self.rawValue
         }
     }
diff --git a/Source/SwiftLintFramework/Extensions/SwiftDeclarationKind+SwiftLint.swift b/Source/SwiftLintFramework/Extensions/SwiftDeclarationKind+SwiftLint.swift
index 892368069..8bf1ae85c 100644
--- a/Source/SwiftLintFramework/Extensions/SwiftDeclarationKind+SwiftLint.swift
+++ b/Source/SwiftLintFramework/Extensions/SwiftDeclarationKind+SwiftLint.swift
@@ -1,7 +1,7 @@
 import SourceKittenFramework
 
-extension SwiftDeclarationKind {
-    internal static let variableKinds: Set<SwiftDeclarationKind> = [
+public extension SwiftDeclarationKind {
+    static let variableKinds: Set<SwiftDeclarationKind> = [
         .varClass,
         .varGlobal,
         .varInstance,
@@ -10,7 +10,7 @@ extension SwiftDeclarationKind {
         .varStatic
     ]
 
-    internal static let functionKinds: Set<SwiftDeclarationKind> = [
+    static let functionKinds: Set<SwiftDeclarationKind> = [
         .functionAccessorAddress,
         .functionAccessorDidset,
         .functionAccessorGetter,
@@ -27,7 +27,7 @@ extension SwiftDeclarationKind {
         .functionSubscript
     ]
 
-    internal static let typeKinds: Set<SwiftDeclarationKind> = [
+    static let typeKinds: Set<SwiftDeclarationKind> = [
         .class,
         .struct,
         .typealias,
@@ -35,7 +35,7 @@ extension SwiftDeclarationKind {
         .enum
     ]
 
-    internal static let extensionKinds: Set<SwiftDeclarationKind> = [
+    static let extensionKinds: Set<SwiftDeclarationKind> = [
         .extension,
         .extensionClass,
         .extensionEnum,
diff --git a/Source/SwiftLintFramework/Extensions/SwiftLintFile+BodyLineCount.swift b/Source/SwiftLintFramework/Extensions/SwiftLintFile+BodyLineCount.swift
index 9c90827bf..dc9af042a 100644
--- a/Source/SwiftLintFramework/Extensions/SwiftLintFile+BodyLineCount.swift
+++ b/Source/SwiftLintFramework/Extensions/SwiftLintFile+BodyLineCount.swift
@@ -1,6 +1,6 @@
 import SwiftSyntax
 
-extension SwiftLintFile {
+public extension SwiftLintFile {
     /// This function determines if given a scope with a left/right brace, such as a function, closure, type, etc, how
     /// many lines the "body" spans when you ignore lines only containing comments and/or whitespace.
     ///
diff --git a/Source/SwiftLintFramework/Extensions/SwiftLintFile+Cache.swift b/Source/SwiftLintFramework/Extensions/SwiftLintFile+Cache.swift
index 4c7ef4818..256a19753 100644
--- a/Source/SwiftLintFramework/Extensions/SwiftLintFile+Cache.swift
+++ b/Source/SwiftLintFramework/Extensions/SwiftLintFile+Cache.swift
@@ -101,7 +101,7 @@ extension SwiftLintFile {
         return id
     }
 
-    internal var sourcekitdFailed: Bool {
+    public var sourcekitdFailed: Bool {
         get {
             return responseCache.get(self) == nil
         }
@@ -123,7 +123,7 @@ extension SwiftLintFile {
         }
     }
 
-    internal var parserDiagnostics: [String]? {
+    public var parserDiagnostics: [String]? {
         if parserDiagnosticsDisabledForTests {
             return nil
         }
@@ -133,9 +133,9 @@ extension SwiftLintFile {
             .map(\.message)
     }
 
-    internal var linesWithTokens: Set<Int> { linesWithTokensCache.get(self) }
+    public var linesWithTokens: Set<Int> { linesWithTokensCache.get(self) }
 
-    internal var structureDictionary: SourceKittenDictionary {
+    public var structureDictionary: SourceKittenDictionary {
         guard let structureDictionary = structureDictionaryCache.get(self) else {
             if let handler = assertHandler {
                 handler()
@@ -146,9 +146,9 @@ extension SwiftLintFile {
         return structureDictionary
     }
 
-    internal var syntaxClassifications: SyntaxClassifications { syntaxClassificationsCache.get(self) }
+    public var syntaxClassifications: SyntaxClassifications { syntaxClassificationsCache.get(self) }
 
-    internal var syntaxMap: SwiftLintSyntaxMap {
+    public var syntaxMap: SwiftLintSyntaxMap {
         guard let syntaxMap = syntaxMapCache.get(self) else {
             if let handler = assertHandler {
                 handler()
@@ -159,16 +159,17 @@ extension SwiftLintFile {
         return syntaxMap
     }
 
-    internal var syntaxTree: SourceFileSyntax { syntaxTreeCache.get(self) }
+    public var syntaxTree: SourceFileSyntax { syntaxTreeCache.get(self) }
 
-    internal var foldedSyntaxTree: SourceFileSyntax? { foldedSyntaxTreeCache.get(self) }
+    public var foldedSyntaxTree: SourceFileSyntax? { foldedSyntaxTreeCache.get(self) }
 
-    internal var locationConverter: SourceLocationConverter { locationConverterCache.get(self) }
+    public var locationConverter: SourceLocationConverter { locationConverterCache.get(self) }
 
-    internal var commands: [Command] { commandsCache.get(self).filter { $0.isValid } }
-    internal var invalidCommands: [Command] { commandsCache.get(self).filter { !$0.isValid } }
+    public var commands: [Command] { commandsCache.get(self).filter { $0.isValid } }
 
-    internal var syntaxTokensByLines: [[SwiftLintSyntaxToken]] {
+    public var invalidCommands: [Command] { commandsCache.get(self).filter { !$0.isValid } }
+
+    public var syntaxTokensByLines: [[SwiftLintSyntaxToken]] {
         guard let syntaxTokensByLines = syntaxTokensByLinesCache.get(self) else {
             if let handler = assertHandler {
                 handler()
@@ -179,7 +180,7 @@ extension SwiftLintFile {
         return syntaxTokensByLines
     }
 
-    internal var syntaxKindsByLines: [[SourceKittenFramework.SyntaxKind]] {
+    public var syntaxKindsByLines: [[SourceKittenFramework.SyntaxKind]] {
         guard let syntaxKindsByLines = syntaxKindsByLinesCache.get(self) else {
             if let handler = assertHandler {
                 handler()
diff --git a/Source/SwiftLintFramework/Extensions/SwiftLintFile+Regex.swift b/Source/SwiftLintFramework/Extensions/SwiftLintFile+Regex.swift
index b7747a55e..b99bd7e0d 100644
--- a/Source/SwiftLintFramework/Extensions/SwiftLintFile+Regex.swift
+++ b/Source/SwiftLintFramework/Extensions/SwiftLintFile+Regex.swift
@@ -1,8 +1,8 @@
 import Foundation
 import SourceKittenFramework
 
-internal func regex(_ pattern: String,
-                    options: NSRegularExpression.Options? = nil) -> NSRegularExpression {
+public func regex(_ pattern: String,
+                  options: NSRegularExpression.Options? = nil) -> NSRegularExpression {
     // all patterns used for regular expressions in SwiftLint are string literals which have been
     // confirmed to work, so it's ok to force-try here.
 
@@ -12,7 +12,7 @@ internal func regex(_ pattern: String,
 }
 
 extension SwiftLintFile {
-    internal func regions(restrictingRuleIdentifiers: Set<RuleIdentifier>? = nil) -> [Region] {
+    public func regions(restrictingRuleIdentifiers: Set<RuleIdentifier>? = nil) -> [Region] {
         var regions = [Region]()
         var disabledRules = Set<RuleIdentifier>()
         let commands: [Command]
@@ -57,7 +57,7 @@ extension SwiftLintFile {
         return regions
     }
 
-    internal func commands(in range: NSRange? = nil) -> [Command] {
+    public func commands(in range: NSRange? = nil) -> [Command] {
         guard let range else {
             return commands
                 .flatMap { $0.expand() }
@@ -93,14 +93,14 @@ extension SwiftLintFile {
         return Location(file: path, line: nextLine, character: nextCharacter)
     }
 
-    internal func match(pattern: String, with syntaxKinds: [SyntaxKind], range: NSRange? = nil) -> [NSRange] {
+    public func match(pattern: String, with syntaxKinds: [SyntaxKind], range: NSRange? = nil) -> [NSRange] {
         return match(pattern: pattern, range: range)
             .filter { $0.1 == syntaxKinds }
             .map { $0.0 }
     }
 
-    internal func matchesAndTokens(matching pattern: String,
-                                   range: NSRange? = nil) -> [(NSTextCheckingResult, [SwiftLintSyntaxToken])] {
+    public func matchesAndTokens(matching pattern: String,
+                                 range: NSRange? = nil) -> [(NSTextCheckingResult, [SwiftLintSyntaxToken])] {
         let contents = stringView
         let range = range ?? contents.range
         let syntax = syntaxMap
@@ -110,25 +110,25 @@ extension SwiftLintFile {
         }
     }
 
-    internal func matchesAndSyntaxKinds(matching pattern: String,
-                                        range: NSRange? = nil) -> [(NSTextCheckingResult, [SyntaxKind])] {
+    public func matchesAndSyntaxKinds(matching pattern: String,
+                                      range: NSRange? = nil) -> [(NSTextCheckingResult, [SyntaxKind])] {
         return matchesAndTokens(matching: pattern, range: range).map { textCheckingResult, tokens in
             (textCheckingResult, tokens.kinds)
         }
     }
 
-    internal func rangesAndTokens(matching pattern: String,
-                                  range: NSRange? = nil) -> [(NSRange, [SwiftLintSyntaxToken])] {
+    public func rangesAndTokens(matching pattern: String,
+                                range: NSRange? = nil) -> [(NSRange, [SwiftLintSyntaxToken])] {
         return matchesAndTokens(matching: pattern, range: range).map { ($0.0.range, $0.1) }
     }
 
-    internal func match(pattern: String, range: NSRange? = nil, captureGroup: Int = 0) -> [(NSRange, [SyntaxKind])] {
+    public func match(pattern: String, range: NSRange? = nil, captureGroup: Int = 0) -> [(NSRange, [SyntaxKind])] {
         return matchesAndSyntaxKinds(matching: pattern, range: range).map { textCheckingResult, syntaxKinds in
             (textCheckingResult.range(at: captureGroup), syntaxKinds)
         }
     }
 
-    internal func swiftDeclarationKindsByLine() -> [[SwiftDeclarationKind]]? {
+    public func swiftDeclarationKindsByLine() -> [[SwiftDeclarationKind]]? {
         if sourcekitdFailed {
             return nil
         }
@@ -151,7 +151,7 @@ extension SwiftLintFile {
         return results
     }
 
-    internal func syntaxTokensByLine() -> [[SwiftLintSyntaxToken]]? {
+    public func syntaxTokensByLine() -> [[SwiftLintSyntaxToken]]? {
         if sourcekitdFailed {
             return nil
         }
@@ -180,7 +180,7 @@ extension SwiftLintFile {
         return results
     }
 
-    internal func syntaxKindsByLine() -> [[SyntaxKind]]? {
+    public func syntaxKindsByLine() -> [[SyntaxKind]]? {
         guard !sourcekitdFailed, let tokens = syntaxTokensByLine() else {
             return nil
         }
@@ -199,22 +199,22 @@ extension SwiftLintFile {
      - returns: An array of [NSRange] objects consisting of regex matches inside
      file contents.
      */
-    internal func match(pattern: String,
-                        excludingSyntaxKinds syntaxKinds: Set<SyntaxKind>,
-                        range: NSRange? = nil,
-                        captureGroup: Int = 0) -> [NSRange] {
+    public func match(pattern: String,
+                      excludingSyntaxKinds syntaxKinds: Set<SyntaxKind>,
+                      range: NSRange? = nil,
+                      captureGroup: Int = 0) -> [NSRange] {
         return match(pattern: pattern, range: range, captureGroup: captureGroup)
             .filter { syntaxKinds.isDisjoint(with: $0.1) }
             .map { $0.0 }
     }
 
-    internal typealias MatchMapping = (NSTextCheckingResult) -> NSRange
+    public typealias MatchMapping = (NSTextCheckingResult) -> NSRange
 
-    internal func match(pattern: String,
-                        range: NSRange? = nil,
-                        excludingSyntaxKinds: Set<SyntaxKind>,
-                        excludingPattern: String,
-                        exclusionMapping: MatchMapping = { $0.range }) -> [NSRange] {
+    public func match(pattern: String,
+                      range: NSRange? = nil,
+                      excludingSyntaxKinds: Set<SyntaxKind>,
+                      excludingPattern: String,
+                      exclusionMapping: MatchMapping = { $0.range }) -> [NSRange] {
         let matches = match(pattern: pattern, excludingSyntaxKinds: excludingSyntaxKinds)
         if matches.isEmpty {
             return []
@@ -225,7 +225,7 @@ extension SwiftLintFile {
         return matches.filter { !$0.intersects(exclusionRanges) }
     }
 
-    internal func append(_ string: String) {
+    public func append(_ string: String) {
         guard string.isNotEmpty else {
             return
         }
@@ -245,7 +245,7 @@ extension SwiftLintFile {
         invalidateCache()
     }
 
-    internal func write<S: StringProtocol>(_ string: S) {
+    public func write<S: StringProtocol>(_ string: S) {
         guard string != contents else {
             return
         }
@@ -267,7 +267,7 @@ extension SwiftLintFile {
         invalidateCache()
     }
 
-    internal func ruleEnabled(violatingRanges: [NSRange], for rule: Rule) -> [NSRange] {
+    public func ruleEnabled(violatingRanges: [NSRange], for rule: Rule) -> [NSRange] {
         let fileRegions = regions()
         if fileRegions.isEmpty { return violatingRanges }
         return violatingRanges.filter { range in
@@ -278,11 +278,11 @@ extension SwiftLintFile {
         }
     }
 
-    internal func ruleEnabled(violatingRange: NSRange, for rule: Rule) -> NSRange? {
+    public func ruleEnabled(violatingRange: NSRange, for rule: Rule) -> NSRange? {
         return ruleEnabled(violatingRanges: [violatingRange], for: rule).first
     }
 
-    internal func isACL(token: SwiftLintSyntaxToken) -> Bool {
+    public func isACL(token: SwiftLintSyntaxToken) -> Bool {
         guard token.kind == .attributeBuiltin else {
             return false
         }
@@ -291,7 +291,7 @@ extension SwiftLintFile {
         return aclString.flatMap(AccessControlLevel.init(description:)) != nil
     }
 
-    internal func contents(for token: SwiftLintSyntaxToken) -> String? {
+    public func contents(for token: SwiftLintSyntaxToken) -> String? {
         return stringView.substringWithByteRange(token.range)
     }
 }
diff --git a/Source/SwiftLintFramework/Extensions/SwiftSyntax+SwiftLint.swift b/Source/SwiftLintFramework/Extensions/SwiftSyntax+SwiftLint.swift
index a63ca77c3..fe591fc46 100644
--- a/Source/SwiftLintFramework/Extensions/SwiftSyntax+SwiftLint.swift
+++ b/Source/SwiftLintFramework/Extensions/SwiftSyntax+SwiftLint.swift
@@ -3,10 +3,10 @@ import SourceKittenFramework
 import SwiftSyntax
 
 // workaround for https://bugs.swift.org/browse/SR-10121 so we can use `Self` in a closure
-protocol SwiftLintSyntaxVisitor: SyntaxVisitor {}
+public protocol SwiftLintSyntaxVisitor: SyntaxVisitor {}
 extension SyntaxVisitor: SwiftLintSyntaxVisitor {}
 
-extension SwiftLintSyntaxVisitor {
+public extension SwiftLintSyntaxVisitor {
     func walk<T, SyntaxType: SyntaxProtocol>(tree: SyntaxType, handler: (Self) -> T) -> T {
 #if DEBUG
         // workaround for stack overflow when running in debug
@@ -44,7 +44,7 @@ extension SwiftLintSyntaxVisitor {
     }
 }
 
-extension SyntaxProtocol {
+public extension SyntaxProtocol {
     func windowsOfThreeTokens() -> [(TokenSyntax, TokenSyntax, TokenSyntax)] {
         Array(tokens(viewMode: .sourceAccurate))
             .windows(ofCount: 3)
@@ -61,7 +61,7 @@ extension SyntaxProtocol {
     }
 }
 
-extension AbsolutePosition {
+public extension AbsolutePosition {
     func isContainedIn(regions: [SourceRange], locationConverter: SourceLocationConverter) -> Bool {
         regions.contains { region in
             region.contains(self, locationConverter: locationConverter)
@@ -69,13 +69,13 @@ extension AbsolutePosition {
     }
 }
 
-extension ByteSourceRange {
+public extension ByteSourceRange {
     func toSourceKittenByteRange() -> ByteRange {
         ByteRange(location: ByteCount(offset), length: ByteCount(length))
     }
 }
 
-extension ClassDeclSyntax {
+public extension ClassDeclSyntax {
     func isXCTestCase(_ testParentClasses: Set<String>) -> Bool {
         guard let inheritanceList = inheritanceClause?.inheritedTypeCollection else {
             return false
@@ -85,7 +85,7 @@ extension ClassDeclSyntax {
     }
 }
 
-extension ExprSyntax {
+public extension ExprSyntax {
     var asFunctionCall: FunctionCallExprSyntax? {
         if let functionCall = self.as(FunctionCallExprSyntax.self) {
             return functionCall
@@ -99,19 +99,19 @@ extension ExprSyntax {
     }
 }
 
-extension StringLiteralExprSyntax {
+public extension StringLiteralExprSyntax {
     var isEmptyString: Bool {
         segments.onlyElement?.contentLength == .zero
     }
 }
 
-extension TokenKind {
+public extension TokenKind {
     var isEqualityComparison: Bool {
         self == .binaryOperator("==") || self == .binaryOperator("!=")
     }
 }
 
-extension ModifierListSyntax? {
+public extension ModifierListSyntax? {
     var containsLazy: Bool {
         contains(tokenKind: .keyword(.lazy))
     }
@@ -160,26 +160,26 @@ extension ModifierListSyntax? {
     }
 }
 
-extension AttributeSyntax {
+public extension AttributeSyntax {
     var attributeNameText: String {
         attributeName.as(SimpleTypeIdentifierSyntax.self)?.name.text ??
             attributeName.description
     }
 }
 
-extension AttributeListSyntax? {
+public extension AttributeListSyntax? {
     func contains(attributeNamed attributeName: String) -> Bool {
         self?.contains { $0.as(AttributeSyntax.self)?.attributeNameText == attributeName } == true
     }
 }
 
-extension TokenKind {
+public extension TokenKind {
     var isUnavailableKeyword: Bool {
         self == .keyword(.unavailable) || self == .identifier("unavailable")
     }
 }
 
-extension VariableDeclSyntax {
+public extension VariableDeclSyntax {
     var isIBOutlet: Bool {
         attributes.contains(attributeNamed: "IBOutlet")
     }
@@ -220,7 +220,7 @@ public extension EnumDeclSyntax {
     }
 }
 
-extension FunctionDeclSyntax {
+public extension FunctionDeclSyntax {
     var isIBAction: Bool {
         attributes.contains(attributeNamed: "IBAction")
     }
@@ -251,7 +251,7 @@ extension FunctionDeclSyntax {
     }
 }
 
-extension AccessorBlockSyntax {
+public extension AccessorBlockSyntax {
     var getAccessor: AccessorDeclSyntax? {
         accessors.first { accessor in
             accessor.accessorKind.tokenKind == .keyword(.get)
@@ -273,7 +273,7 @@ extension AccessorBlockSyntax {
     }
 }
 
-extension TypeInheritanceClauseSyntax? {
+public extension TypeInheritanceClauseSyntax? {
     func containsInheritedType(inheritedTypes: Set<String>) -> Bool {
         self?.inheritedTypeCollection.contains { elem in
             guard let simpleType = elem.typeName.as(SimpleTypeIdentifierSyntax.self) else {
@@ -285,7 +285,7 @@ extension TypeInheritanceClauseSyntax? {
     }
 }
 
-extension Trivia {
+public extension Trivia {
     func containsNewlines() -> Bool {
         contains { piece in
             if case .newlines = piece {
@@ -312,7 +312,7 @@ extension Trivia {
     }
 }
 
-extension TriviaPiece {
+public extension TriviaPiece {
     var isHorizontalWhitespace: Bool {
         switch self {
         case .spaces, .tabs:
@@ -323,7 +323,7 @@ extension TriviaPiece {
     }
 }
 
-extension IntegerLiteralExprSyntax {
+public extension IntegerLiteralExprSyntax {
     var isZero: Bool {
         guard case let .integerLiteral(number) = digits.tokenKind else {
             return false
@@ -333,7 +333,7 @@ extension IntegerLiteralExprSyntax {
     }
 }
 
-extension FloatLiteralExprSyntax {
+public extension FloatLiteralExprSyntax {
     var isZero: Bool {
         guard case let .floatingLiteral(number) = floatingDigits.tokenKind else {
             return false
diff --git a/Source/SwiftLintFramework/Extensions/SyntaxClassification+isComment.swift b/Source/SwiftLintFramework/Extensions/SyntaxClassification+isComment.swift
index 26211d7fc..0507e0dd3 100644
--- a/Source/SwiftLintFramework/Extensions/SyntaxClassification+isComment.swift
+++ b/Source/SwiftLintFramework/Extensions/SyntaxClassification+isComment.swift
@@ -1,6 +1,6 @@
 import IDEUtils
 
-extension SyntaxClassification {
+public extension SyntaxClassification {
     // True if it is any kind of comment.
     var isComment: Bool {
         switch self {
diff --git a/Source/SwiftLintFramework/Extensions/SyntaxKind+SwiftLint.swift b/Source/SwiftLintFramework/Extensions/SyntaxKind+SwiftLint.swift
index ab78c9a6d..55ae676ee 100644
--- a/Source/SwiftLintFramework/Extensions/SyntaxKind+SwiftLint.swift
+++ b/Source/SwiftLintFramework/Extensions/SyntaxKind+SwiftLint.swift
@@ -1,6 +1,6 @@
 import SourceKittenFramework
 
-extension SyntaxKind {
+public extension SyntaxKind {
     init(shortName: Swift.String) throws {
         let prefix = "source.lang.swift.syntaxtype."
         guard let kind = SyntaxKind(rawValue: prefix + shortName.lowercased()) else {
diff --git a/Source/SwiftLintFramework/Helpers/Stack.swift b/Source/SwiftLintFramework/Helpers/Stack.swift
index f4d126f25..0f1d1a69b 100644
--- a/Source/SwiftLintFramework/Helpers/Stack.swift
+++ b/Source/SwiftLintFramework/Helpers/Stack.swift
@@ -1,31 +1,43 @@
 /// A basic stack type implementing the LIFO principle - only the last inserted element can be accessed and removed.
-struct Stack<Element> {
+public struct Stack<Element> {
     private var elements = [Element]()
 
-    var isEmpty: Bool {
+    /// Creates an empty `Stack`.
+    public init() {}
+
+    /// True if the stack has no elements. False otherwise.
+    public var isEmpty: Bool {
         elements.isEmpty
     }
 
-    var count: Int {
+    /// The number of elements in this stack.
+    public var count: Int {
         elements.count
     }
 
-    mutating func push(_ element: Element) {
+    /// Pushes (appends) an element onto the stack.
+    ///
+    /// - parameter element: The element to push onto the stack.
+    public mutating func push(_ element: Element) {
         elements.append(element)
     }
 
+    /// Removes and returns the last element of the stack.
+    ///
+    /// - returns: The last element of the stack if the stack is not empty; otherwise, nil.
     @discardableResult
-    mutating func pop() -> Element? {
+    public mutating func pop() -> Element? {
         elements.popLast()
     }
 
-    func peek() -> Element? {
+    /// Returns the last element of the stack if the stack is not empty; otherwise, nil.
+    public func peek() -> Element? {
         elements.last
     }
 }
 
 extension Stack: CustomDebugStringConvertible where Element == CustomDebugStringConvertible {
-    var debugDescription: String {
+    public var debugDescription: String {
         let intermediateElements = count > 1 ? elements[1 ..< count - 1] : []
         return """
             Stack with \(count) elements:
diff --git a/Source/SwiftLintFramework/Models/AccessControlLevel.swift b/Source/SwiftLintFramework/Models/AccessControlLevel.swift
index 91bea2865..5e23aca58 100644
--- a/Source/SwiftLintFramework/Models/AccessControlLevel.swift
+++ b/Source/SwiftLintFramework/Models/AccessControlLevel.swift
@@ -16,7 +16,7 @@ public enum AccessControlLevel: String, CustomStringConvertible {
     /// Initializes an access control level by its Swift source keyword value.
     ///
     /// - parameter value: The value used to describe this level in Swift source code.
-    internal init?(description value: String) {
+    public init?(description value: String) {
         switch value {
         case "private": self = .private
         case "fileprivate": self = .fileprivate
@@ -45,7 +45,7 @@ public enum AccessControlLevel: String, CustomStringConvertible {
     }
 
     /// Returns true if is `private` or `fileprivate`
-    var isPrivate: Bool {
+    public var isPrivate: Bool {
         return self == .private || self == .fileprivate
     }
 }
diff --git a/Source/SwiftLintFramework/Models/Command.swift b/Source/SwiftLintFramework/Models/Command.swift
index e3c547537..d9efb2ac6 100644
--- a/Source/SwiftLintFramework/Models/Command.swift
+++ b/Source/SwiftLintFramework/Models/Command.swift
@@ -46,15 +46,15 @@ public struct Command: Equatable {
     }
 
     /// The action (verb) that SwiftLint should perform when interpreting this command.
-    internal let action: Action
+    public let action: Action
     /// The identifiers for the rules associated with this command.
-    internal let ruleIdentifiers: Set<RuleIdentifier>
+    public let ruleIdentifiers: Set<RuleIdentifier>
     /// The line in the source file where this command is defined.
-    internal let line: Int
+    public let line: Int
     /// The character offset within the line in the source file where this command is defined.
-    internal let character: Int?
+    public let character: Int?
     /// This command's modifier, if any.
-    internal let modifier: Modifier?
+    public let modifier: Modifier?
     /// The comment following this command's `-` delimiter, if any.
     internal let trailingComment: String?
 
diff --git a/Source/SwiftLintFramework/Models/Example.swift b/Source/SwiftLintFramework/Models/Example.swift
index 1bb9addc3..455bf8195 100644
--- a/Source/SwiftLintFramework/Models/Example.swift
+++ b/Source/SwiftLintFramework/Models/Example.swift
@@ -147,7 +147,7 @@ extension Example: Comparable {
     }
 }
 
-extension Array where Element == Example {
+public extension Array where Element == Example {
     /// Make these examples skip wrapping in comment tests.
     func skipWrappingInCommentTests() -> Self {
         map { $0.skipWrappingInCommentTest() }
diff --git a/Source/SwiftLintFramework/Models/SwiftLintFile.swift b/Source/SwiftLintFramework/Models/SwiftLintFile.swift
index d626da1e1..f70a31227 100644
--- a/Source/SwiftLintFramework/Models/SwiftLintFile.swift
+++ b/Source/SwiftLintFramework/Models/SwiftLintFile.swift
@@ -4,10 +4,10 @@ import SourceKittenFramework
 /// A unit of Swift source code, either on disk or in memory.
 public final class SwiftLintFile {
     /// The underlying SourceKitten file.
-    let file: File
+    public let file: File
     let id: UUID
     /// Whether or not this is a file generated for testing purposes.
-    private(set) var isTestFile = false
+    public private(set) var isTestFile = false
     /// A file is virtual if it is not backed by a filesystem path.
     private(set) var isVirtual = false
 
diff --git a/Source/SwiftLintFramework/Models/SwiftLintSyntaxMap.swift b/Source/SwiftLintFramework/Models/SwiftLintSyntaxMap.swift
index 31f2e89f3..13f122ea3 100644
--- a/Source/SwiftLintFramework/Models/SwiftLintSyntaxMap.swift
+++ b/Source/SwiftLintFramework/Models/SwiftLintSyntaxMap.swift
@@ -21,7 +21,7 @@ public struct SwiftLintSyntaxMap {
     /// - parameter byteRange: Byte-based NSRange.
     ///
     /// - returns: The array of syntax tokens intersecting with byte range.
-    internal func tokens(inByteRange byteRange: ByteRange) -> [SwiftLintSyntaxToken] {
+    public func tokens(inByteRange byteRange: ByteRange) -> [SwiftLintSyntaxToken] {
         func intersect(_ token: SwiftLintSyntaxToken) -> Bool {
             return token.range.intersects(byteRange)
         }
@@ -48,7 +48,7 @@ public struct SwiftLintSyntaxMap {
     /// - parameter byteRange: Byte range.
     ///
     /// - returns: The syntax kinds in the specified byte range.
-    internal func kinds(inByteRange byteRange: ByteRange) -> [SyntaxKind] {
+    public func kinds(inByteRange byteRange: ByteRange) -> [SyntaxKind] {
         return tokens(inByteRange: byteRange).compactMap { $0.kind }
     }
 }
diff --git a/Source/SwiftLintFramework/Models/SwiftLintSyntaxToken.swift b/Source/SwiftLintFramework/Models/SwiftLintSyntaxToken.swift
index 3d48c4796..9266e39f9 100644
--- a/Source/SwiftLintFramework/Models/SwiftLintSyntaxToken.swift
+++ b/Source/SwiftLintFramework/Models/SwiftLintSyntaxToken.swift
@@ -32,7 +32,7 @@ public struct SwiftLintSyntaxToken {
     }
 }
 
-extension Array where Element == SwiftLintSyntaxToken {
+public extension Array where Element == SwiftLintSyntaxToken {
     /// The kinds for these tokens.
     var kinds: [SyntaxKind] {
         return compactMap { $0.kind }
diff --git a/Source/SwiftLintFramework/Protocols/CacheDescriptionProvider.swift b/Source/SwiftLintFramework/Protocols/CacheDescriptionProvider.swift
index 349b3e8bf..01c3b4585 100644
--- a/Source/SwiftLintFramework/Protocols/CacheDescriptionProvider.swift
+++ b/Source/SwiftLintFramework/Protocols/CacheDescriptionProvider.swift
@@ -1,5 +1,5 @@
 /// Interface providing access to a cache description.
-internal protocol CacheDescriptionProvider {
+public protocol CacheDescriptionProvider {
     /// The cache description which will be used to determine if a previous
     /// cached value is still valid given the new cache value.
     var cacheDescription: String { get }
diff --git a/Source/SwiftLintFramework/Protocols/Rule.swift b/Source/SwiftLintFramework/Protocols/Rule.swift
index 17928de3f..b13db3941 100644
--- a/Source/SwiftLintFramework/Protocols/Rule.swift
+++ b/Source/SwiftLintFramework/Protocols/Rule.swift
@@ -63,27 +63,27 @@ public protocol Rule {
     func validate(file: SwiftLintFile, using storage: RuleStorage, compilerArguments: [String]) -> [StyleViolation]
 }
 
-extension Rule {
-    public func validate(file: SwiftLintFile, using storage: RuleStorage,
-                         compilerArguments: [String]) -> [StyleViolation] {
+public extension Rule {
+    func validate(file: SwiftLintFile, using storage: RuleStorage,
+                  compilerArguments: [String]) -> [StyleViolation] {
         return validate(file: file, compilerArguments: compilerArguments)
     }
 
-    public func validate(file: SwiftLintFile, compilerArguments: [String]) -> [StyleViolation] {
+    func validate(file: SwiftLintFile, compilerArguments: [String]) -> [StyleViolation] {
         return validate(file: file)
     }
 
-    public func isEqualTo(_ rule: Rule) -> Bool {
+    func isEqualTo(_ rule: Rule) -> Bool {
         return Self.description == type(of: rule).description
     }
 
-    public func collectInfo(for file: SwiftLintFile, into storage: RuleStorage, compilerArguments: [String]) {
+    func collectInfo(for file: SwiftLintFile, into storage: RuleStorage, compilerArguments: [String]) {
         // no-op: only CollectingRules mutate their storage
     }
 
     /// The cache description which will be used to determine if a previous
     /// cached value is still valid given the new cache value.
-    internal var cacheDescription: String {
+    var cacheDescription: String {
         return (self as? CacheDescriptionProvider)?.cacheDescription ?? configurationDescription
     }
 }
@@ -130,7 +130,6 @@ public protocol CorrectableRule: Rule {
     func correct(file: SwiftLintFile, using storage: RuleStorage, compilerArguments: [String]) -> [Correction]
 }
 
-@_spi(TestHelper)
 public extension CorrectableRule {
     func correct(file: SwiftLintFile, compilerArguments: [String]) -> [Correction] {
         return correct(file: file)
@@ -142,7 +141,6 @@ public extension CorrectableRule {
 
 /// A correctable rule that can apply its corrections by replacing the content of ranges in the offending file with
 /// updated content.
-@_spi(TestHelper)
 public protocol SubstitutionCorrectableRule: CorrectableRule {
     /// Returns the NSString-based `NSRange`s to be replaced in the specified file.
     ///
@@ -160,7 +158,6 @@ public protocol SubstitutionCorrectableRule: CorrectableRule {
     func substitution(for violationRange: NSRange, in file: SwiftLintFile) -> (NSRange, String)?
 }
 
-@_spi(TestHelper)
 public extension SubstitutionCorrectableRule {
     func correct(file: SwiftLintFile) -> [Correction] {
         let violatingRanges = file.ruleEnabled(violatingRanges: violationRanges(in: file), for: self)
@@ -184,7 +181,6 @@ public extension SubstitutionCorrectableRule {
 }
 
 /// A `SubstitutionCorrectableRule` that is also an `ASTRule`.
-@_spi(TestHelper)
 public protocol SubstitutionCorrectableASTRule: SubstitutionCorrectableRule, ASTRule {
     /// Returns the NSString-based `NSRange`s to be replaced in the specified file.
     ///
@@ -220,7 +216,6 @@ public extension AnalyzerRule {
 }
 
 /// :nodoc:
-@_spi(TestHelper)
 public extension AnalyzerRule where Self: CorrectableRule {
     func correct(file: SwiftLintFile) -> [Correction] {
         queuedFatalError("Must call `correct(file:compilerArguments:)` for AnalyzerRule")
diff --git a/Source/SwiftLintFramework/Protocols/SwiftSyntaxCorrectableRule.swift b/Source/SwiftLintFramework/Protocols/SwiftSyntaxCorrectableRule.swift
index 77006568d..1f9ef51e9 100644
--- a/Source/SwiftLintFramework/Protocols/SwiftSyntaxCorrectableRule.swift
+++ b/Source/SwiftLintFramework/Protocols/SwiftSyntaxCorrectableRule.swift
@@ -1,7 +1,6 @@
 import SwiftSyntax
 
 /// A SwiftLint CorrectableRule that performs its corrections using a SwiftSyntax `SyntaxRewriter`.
-@_spi(TestHelper)
 public protocol SwiftSyntaxCorrectableRule: SwiftSyntaxRule, CorrectableRule {
     /// Produce a `ViolationsSyntaxRewriter` for the given file.
     ///
@@ -11,7 +10,6 @@ public protocol SwiftSyntaxCorrectableRule: SwiftSyntaxRule, CorrectableRule {
     func makeRewriter(file: SwiftLintFile) -> ViolationsSyntaxRewriter?
 }
 
-@_spi(TestHelper)
 public extension SwiftSyntaxCorrectableRule {
     func correct(file: SwiftLintFile) -> [Correction] {
         guard let rewriter = makeRewriter(file: file),
diff --git a/Source/SwiftLintFramework/Protocols/SwiftSyntaxRule.swift b/Source/SwiftLintFramework/Protocols/SwiftSyntaxRule.swift
index 7a187aa91..23c32c0a4 100644
--- a/Source/SwiftLintFramework/Protocols/SwiftSyntaxRule.swift
+++ b/Source/SwiftLintFramework/Protocols/SwiftSyntaxRule.swift
@@ -112,7 +112,7 @@ public struct ReasonedRuleViolation: Comparable {
 
 /// Extension for arrays of `ReasonedRuleViolation`s that provides the automatic conversion of
 /// `AbsolutePosition`s into `ReasonedRuleViolation`s (without a specific reason).
-extension Array where Element == ReasonedRuleViolation {
+public extension Array where Element == ReasonedRuleViolation {
     /// Append a minimal violation for the specified position.
     ///
     /// - parameter position: The position for the violation to append.
@@ -131,9 +131,9 @@ extension Array where Element == ReasonedRuleViolation {
 /// A SwiftSyntax `SyntaxVisitor` that produces absolute positions where violations should be reported.
 open class ViolationsSyntaxVisitor: SyntaxVisitor {
     /// Positions in a source file where violations should be reported.
-    internal var violations: [ReasonedRuleViolation] = []
+    public var violations: [ReasonedRuleViolation] = []
     /// List of declaration types that shall be skipped while traversing the AST.
-    internal var skippableDeclarations: [DeclSyntaxProtocol.Type] { [] }
+    open var skippableDeclarations: [DeclSyntaxProtocol.Type] { [] }
 
     override open func visit(_ node: ActorDeclSyntax) -> SyntaxVisitorContinueKind {
         skippableDeclarations.contains { $0 == ActorDeclSyntax.self } ? .skipChildren : .visitChildren
@@ -172,7 +172,7 @@ open class ViolationsSyntaxVisitor: SyntaxVisitor {
     }
 }
 
-extension Array where Element == DeclSyntaxProtocol.Type {
+public extension Array where Element == DeclSyntaxProtocol.Type {
     /// All visitable declaration syntax types.
     static let all: Self = [
         ActorDeclSyntax.self,
diff --git a/Source/SwiftLintFramework/Rules/RuleConfigurations/RegexConfiguration.swift b/Source/SwiftLintFramework/Rules/RuleConfigurations/RegexConfiguration.swift
index 1a6ec9713..087008c23 100644
--- a/Source/SwiftLintFramework/Rules/RuleConfigurations/RegexConfiguration.swift
+++ b/Source/SwiftLintFramework/Rules/RuleConfigurations/RegexConfiguration.swift
@@ -26,7 +26,7 @@ public struct RegexConfiguration: SeverityBasedRuleConfiguration, Hashable, Cach
         return "\(severity.rawValue): \(regex.pattern)"
     }
 
-    internal var cacheDescription: String {
+    public var cacheDescription: String {
         let jsonObject: [String] = [
             identifier,
             name ?? "",
diff --git a/Source/SwiftLintFramework/Rules/RuleConfigurations/SeverityLevelsConfiguration.swift b/Source/SwiftLintFramework/Rules/RuleConfigurations/SeverityLevelsConfiguration.swift
index 54380a6d2..ce4d464a8 100644
--- a/Source/SwiftLintFramework/Rules/RuleConfigurations/SeverityLevelsConfiguration.swift
+++ b/Source/SwiftLintFramework/Rules/RuleConfigurations/SeverityLevelsConfiguration.swift
@@ -19,21 +19,21 @@ public struct SeverityLevelsConfiguration: RuleConfiguration, Equatable {
     }
 
     /// The threshold for a violation to be a warning.
-    var warning: Int
+    public var warning: Int
     /// The threshold for a violation to be an error.
-    var error: Int?
+    public var error: Int?
 
     /// Create a `SeverityLevelsConfiguration` based on the sepecified `warning` and `error` thresholds.
     ///
     /// - parameter warning: The threshold for a violation to be a warning.
     /// - parameter error:   The threshold for a violation to be an error.
-    init(warning: Int, error: Int? = nil) {
+    public init(warning: Int, error: Int? = nil) {
         self.warning = warning
         self.error = error
     }
 
     /// The rule parameters that define the thresholds that should map to each severity.
-    var params: [RuleParameter<Int>] {
+    public var params: [RuleParameter<Int>] {
         if let error {
             return [RuleParameter(severity: .error, value: error),
                     RuleParameter(severity: .warning, value: warning)]
diff --git a/Source/SwiftLintFramework/Rules/Style/IdentifierNameRule.swift b/Source/SwiftLintFramework/Rules/Style/IdentifierNameRule.swift
index 74d512641..a6ec2face 100644
--- a/Source/SwiftLintFramework/Rules/Style/IdentifierNameRule.swift
+++ b/Source/SwiftLintFramework/Rules/Style/IdentifierNameRule.swift
@@ -142,4 +142,12 @@ private extension String {
         let operators = ["/", "=", "-", "+", "!", "*", "|", "^", "~", "?", ".", "%", "<", ">", "&"]
         return operators.contains(where: hasPrefix)
     }
+
+    func nameStrippingLeadingUnderscoreIfPrivate(_ dict: SourceKittenDictionary) -> String {
+        if let acl = dict.accessibility,
+            acl.isPrivate && first == "_" {
+            return String(self[index(after: startIndex)...])
+        }
+        return self
+    }
 }