swift-format!
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@@ -14,7 +14,8 @@ struct LLMError: Error {
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/// Load and return the model and tokenizer
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public func load(
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hub: HubApi = HubApi(), configuration: ModelConfiguration, progressHandler: @escaping (Progress) -> Void = { _ in }
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hub: HubApi = HubApi(), configuration: ModelConfiguration,
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progressHandler: @escaping (Progress) -> Void = { _ in }
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) async throws -> (LLMModel, Tokenizer) {
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// note: this doesn't have a way to pass the HubApi
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let tokenizer = try await loadTokenizer(configuration: configuration)
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@@ -10,35 +10,37 @@ import Foundation
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/// implementation, if needed.
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public struct ModelConfiguration {
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public let id: String
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/// overrides for TokenizerModel/knownTokenizers -- useful before swift-transformers is updated
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public let overrideTokenizer: String?
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/// custom preparation logic for the prompt. custom tokenizers provide more capability, but this
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/// allows some minor formtting changes, e.g. wrapping the user input in the expected prompt
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/// format
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private let preparePrompt: ((String) -> String)?
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public init(id: String, overrideTokenizer: String? = nil, preparePrompt: ((String) -> String)? = nil) {
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public init(
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id: String, overrideTokenizer: String? = nil, preparePrompt: ((String) -> String)? = nil
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) {
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self.id = id
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self.overrideTokenizer = overrideTokenizer
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self.preparePrompt = preparePrompt
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}
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public func prepare(prompt: String) -> String {
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preparePrompt?(prompt) ?? prompt
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}
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public static var registry = [String:ModelConfiguration]()
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public static var registry = [String: ModelConfiguration]()
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public static func register(configurations: [ModelConfiguration]) {
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bootstrap()
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for c in configurations {
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registry[c.id] = c
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}
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}
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public static func configuration(id: String) -> ModelConfiguration {
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bootstrap()
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@@ -51,40 +53,39 @@ public struct ModelConfiguration {
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}
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extension ModelConfiguration {
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static let mistral7B4bit = ModelConfiguration(id: "mlx-community/Mistral-7B-v0.1-hf-4bit-mlx")
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static let codeLlama13b4bit = ModelConfiguration(
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id: "mlx-community/CodeLlama-13b-Instruct-hf-4bit-MLX",
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overrideTokenizer: "PreTrainedTokenizer")
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{ prompt in
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overrideTokenizer: "PreTrainedTokenizer"
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) { prompt in
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// given the prompt: func sortArray(_ array: [Int]) -> String { <FILL_ME> }
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// the python code produces this (via its custom tokenizer):
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// <PRE> func sortArray(_ array: [Int]) -> String { <SUF> } <MID>
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"<PRE> " +
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prompt.replacingOccurrences(of: "<FILL_ME>", with: "<SUF>") +
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" <MID>"
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"<PRE> " + prompt.replacingOccurrences(of: "<FILL_ME>", with: "<SUF>") + " <MID>"
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}
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static let phi4bit = ModelConfiguration(id: "mlx-community/phi-2-hf-4bit-mlx") { prompt in
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"Instruct: \(prompt). Output: "
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}
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static let gemma2bQuantized = ModelConfiguration(
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id: "mlx-community/quantized-gemma-2b-it",
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overrideTokenizer: "PreTrainedTokenizer") { prompt in
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"<start_of_turn>user \(prompt)<end_of_turn><start_of_turn>model"
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}
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overrideTokenizer: "PreTrainedTokenizer"
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) { prompt in
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"<start_of_turn>user \(prompt)<end_of_turn><start_of_turn>model"
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}
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private enum BootstrapState {
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case idle
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case bootstrapping
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case bootstrapped
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}
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static private var bootstrapState = BootstrapState.idle
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static func bootstrap() {
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switch bootstrapState {
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case .idle:
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@@ -99,7 +100,7 @@ extension ModelConfiguration {
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case .bootstrapping:
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break
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case .bootstrapped:
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break
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}
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@@ -42,7 +42,7 @@ struct SyncGenerator: AsyncParsableCommand {
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let modelConfiguration = ModelConfiguration.configuration(id: model)
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let (model, tokenizer) = try await load(configuration: modelConfiguration)
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let prompt = modelConfiguration.prepare(prompt: self.prompt)
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let promptTokens = tokenizer.encode(text: prompt)
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@@ -57,7 +57,8 @@ struct SyncGenerator: AsyncParsableCommand {
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var tokens = [Int]()
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var printed = 0
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for token in TokenIterator(prompt: MLXArray(promptTokens), model: model, temp: temperature) {
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for token in TokenIterator(prompt: MLXArray(promptTokens), model: model, temp: temperature)
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{
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if tokens.isEmpty {
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eval(token)
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let now = Date.timeIntervalSinceReferenceDate
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@@ -130,7 +131,7 @@ struct AsyncGenerator: AsyncParsableCommand {
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let modelConfiguration = ModelConfiguration.configuration(id: model)
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let (model, tokenizer) = try await load(configuration: modelConfiguration)
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let prompt = modelConfiguration.prepare(prompt: self.prompt)
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let promptTokens = tokenizer.encode(text: prompt)
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@@ -145,7 +146,8 @@ struct AsyncGenerator: AsyncParsableCommand {
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var tokens = [Int]()
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var printed = 0
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let (task, channel) = generate(prompt: MLXArray(promptTokens), model: model, temp: temperature)
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let (task, channel) = generate(
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prompt: MLXArray(promptTokens), model: model, temp: temperature)
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for await token in channel {
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if tokens.isEmpty {
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