AI & ML Developer Guide

Every capability on this page is part of the standard library — no pip, no npm, no third-party packages. Import the bundle, compile with the flag, and go. See the API reference for full class documentation.

Authentication

Cloud APIs use API keys stored in plain text files in your working directory.

OpenAI

Create openai_api_key.dat containing your key, then read it at startup:

use API.OpenAI, System.IO.Filesystem;

token := FileReader->ReadFile("openai_api_key.dat")->Trim();

Gemini

Create gemini_api_key.dat and use the built-in helper:

use API.Google.Gemini;

token := EndPoint->GetApiKey();   # reads gemini_api_key.dat

Ollama

No key required. Start the daemon and pull a model:

ollama serve
ollama pull llama3.2

OpenAI

Chat & Text

use API.OpenAI, System.IO.Filesystem;

class ChatExample {
  function : Main(args : String[]) ~ Nil {
    token := FileReader->ReadFile("openai_api_key.dat")->Trim();

    # single-turn
    response := Response->Respond("gpt-4o-mini",
      Pair->New("user", "Explain JIT compilation in one sentence."),
      token);
    response->GetText()->PrintLine();

    # multi-turn conversation
    messages := Vector->New()>;
    messages->AddBack(Pair->New("system", "You are a concise coding assistant."));
    messages->AddBack(Pair->New("user",   "What is a closure?"));
    messages->AddBack(Pair->New("assistant", "A closure captures its enclosing scope."));
    messages->AddBack(Pair->New("user",   "Show me one in Objeck."));

    response := Response->Respond("gpt-4o-mini", messages, token);
    response->GetText()->PrintLine();
  }
}

> obc -src chat.obs -lib net,net_server,json,cipher,misc,openai
> obr chat

Vision

use API.OpenAI, System.IO.Filesystem;

bytes   := FileReader->ReadBinaryFile("photo.jpg");
image   := ImageQuery->New("What is in this image?", bytes, ImageQuery->MimeType->JPEG);
query   := Pair->New("user", image);
response := Response->Respond("gpt-4o", query, token);
response->GetText()->PrintLine();

Embeddings

use API.OpenAI;

values := Embedding->Create("Objeck is a JIT-compiled language",
  "text-embedding-3-small", token);
if(values <> Nil) {
  "Dimensions: {$values->Size()}"->PrintLine();   # 1536
};

Moderation

Per-category safety flags and confidence scores:

use API.OpenAI;

result := Moderation->Check("I want to hurt someone.", token);
if(result <> Nil) {
  "Flagged: {$result->IsFlagged()}"->PrintLine();
  if(result->IsFlagged()) {
    "violence score: {$result->GetScore("violence")}"->PrintLine();
  };
};

Categories: harassment, hate, self-harm, sexual, violence (and /threatening, /graphic, /instructions, /intent variants).

Batch Processing

Up to 50,000 requests at 50% cost. Results within 24 hours.

use API.OpenAI, System.IO.Filesystem;

# 1. upload request file
data := FileReader->ReadBinaryFile("requests.jsonl");
file := File->Create("requests.jsonl", "batch", data, token);

# 2. submit
job := Batch->Create(file->GetId(), "/v1/chat/completions", token);
"Batch ID: {$job->GetId()}"->PrintLine();

# 3. poll for completion
job := Batch->Get(job->GetId(), token);
if(job->IsComplete()) {
  "Output file: {$job->GetOutputFileId()}"->PrintLine();
};

Request format — one JSON object per line in requests.jsonl:

{"custom_id":"r1","method":"POST","url":"/v1/chat/completions","body":{"model":"gpt-4o-mini","messages":[{"role":"user","content":"Hello"}]}}

Realtime Audio

Text or audio over WebSocket; returns transcript and PCM audio. Requires -lib sdl2 for playback.

use API.OpenAI, Game.SDL2;

response := Realtime->Respond("What time is it in Tokyo?",
  "gpt-4o-realtime-preview", token);
if(response <> Nil) {
  response->GetFirst()->PrintLine();                      # transcript
  audio := response->GetSecond();
  Mixer->PlayPcm(audio->Get(), 24000,
    AudioFormat->SDL_AUDIO_S16LSB, 1);                   # 24 kHz mono PCM
};

Gemini

Chat & Vision

use API.Google.Gemini;

class GeminiChat {
  function : Main(args : String[]) ~ Nil {
    token := EndPoint->GetApiKey();

    # single-turn text
    content := Content->New("user")
      ->AddPart(TextPart->New("Why is the sky blue?"));
    candidates := Model->GenerateContent("models/gemini-2.0-flash", content, token);
    if(candidates <> Nil & <>candidates->IsEmpty()) {
      candidates->First()->GetAllText()->PrintLine();
    };

    # image + text
    bytes := System.IO.Filesystem.FileReader->ReadBinaryFile("chart.png");
    content := Content->New("user")
      ->AddPart(TextPart->New("Summarize this chart."))
      ->AddPart(BinaryPart->New(bytes, "image/png"));
    candidates := Model->GenerateContent("models/gemini-2.0-flash", content, token);
    if(candidates <> Nil & <>candidates->IsEmpty()) {
      candidates->First()->GetAllText()->PrintLine();
    };

    # multi-turn with system instruction
    chat := Chat->New("models/gemini-2.0-flash", token);
    chat->SetSystemInstruction(
      Content->New("system")->AddPart(TextPart->New("You are a coding assistant.")));
    chat->SendPart(TextPart->New("What is a closure?"), "user")->GetAllText()->PrintLine();
    chat->SendPart(TextPart->New("Show me one in Objeck."), "user")->GetAllText()->PrintLine();
  }
}

Search Grounding

Anchor responses in live Google Search results for up-to-date answers:

use API.Google.Gemini;

content := Content->New("user")
  ->AddPart(TextPart->New("What major AI models were released this month?"));

candidates := Model->GenerateContentWithGrounding(
  "models/gemini-2.0-flash", content, token);
if(candidates <> Nil & <>candidates->IsEmpty()) {
  candidates->First()->GetAllText()->PrintLine();
};

Files API

Upload once, reference across many requests without re-uploading:

use API.Google.Gemini, System.IO.Filesystem;

# upload
data := FileReader->ReadBinaryFile("report.pdf");
file := FileManager->Upload("Q1 Report", data, "application/pdf", token);
if(file <> Nil & file->IsActive()) {
  "URI: {$file->GetUri()}"->PrintLine();
};

# list active files
files := FileManager->List(token);
each(f in files) {
  "{$f->GetName()}: {$f->GetState()}"->PrintLine();
};

# delete
FileManager->Delete("files/abc123", token);

Context Caching

Cache large reused content server-side to avoid re-tokenization cost on every request:

use API.Google.Gemini, System.IO.Filesystem;

large_context := FileReader->ReadFile("legal_document.txt");
content := Content->New("user")->AddPart(TextPart->New(large_context));

# cache for 5 minutes (300 seconds)
item := CachedContent->Create(
  "models/gemini-1.5-pro-001", content, 300, "legal-doc-cache", token);
if(item <> Nil) {
  "Tokens cached: {$item->GetTokenCount()}"->PrintLine();
  "Expires: {$item->GetExpireTime()}"->PrintLine();
};

CachedContent->Delete("cachedContents/abc123", token);

Embeddings

use API.Google.Gemini;

# single embedding (768 dimensions)
content := Content->New("user")->AddPart(TextPart->New("machine learning"));
values := Model->EmbedContent(content, token);
"Dimensions: {$values->Size()}"->PrintLine();

# batch — multiple texts in one round-trip
texts := Vector->New();
texts->AddBack("Objeck is JIT-compiled");
texts->AddBack("Python uses an interpreter");
texts->AddBack("Rust is memory-safe");

embeddings := Model->BatchEmbedContent("models/text-embedding-004", texts, token);
each(i : embeddings) {
  "  [{$i}] dim={$embeddings->Get(i)->Size()}"->PrintLine();
};

Ollama (Local LLMs)

Run open-source models locally. No API key, no data leaves your machine. Install Ollama, start the daemon, then pull a model:

ollama serve && ollama pull llama3.2

use API.Ollama;

class LocalChat {
  function : Main(args : String[]) ~ Nil {
    # one-shot generation
    Completion->Generate("llama3.2", "What is 2 + 2?")->PrintLine();

    # with temperature control
    opts := Options->New()->SetTemperature(0.2);
    Completion->Generate("llama3.2", "List 3 capitals of Europe.", opts)->PrintLine();

    # multi-turn — context maintained automatically
    chat := Chat->New("llama3.2");
    chat->Send("My name is Alice.");
    chat->Send("What is my name?")->PrintLine();   # "Your name is Alice."

    # vision (multimodal models)
    image := System.IO.Filesystem.File->New("photo.jpg");
    Completion->Generate("llava", "Describe this image.", image)->PrintLine();

    # local embeddings
    values := Model->Embeddings("nomic-embed-text", "machine learning");
    "Dimensions: {$values->Size()}"->PrintLine();
  }
}

> obc -src local_chat.obs -lib net,json,cipher,misc,ollama
> obr local_chat

Machine Learning

Pure Objeck ML routines backed by the Eigen C++ library — no Python, no external frameworks. Covers linear algebra, regression, neural networks, clustering, and model evaluation.

Matrix Operations

Matrix2D provides the foundational matrix math used by all other ML classes, plus activation functions used in neural architectures:

use System.ML;

class MatrixExample {
  function : Main(args : String[]) ~ Nil {
    a := [[1.0, 2.0], [3.0, 4.0]];
    b := [[5.0, 6.0], [7.0, 8.0]];

    # matrix dot product: [[19,22],[43,50]]
    c := Matrix2D->DotProduct(a, b);
    rows := c->Size();
    each(r : rows) {
      each(col : c[r]->Size()) {
        "{$c[r,col]} "->Print();
      };
      '\n'->Print();
    };

    # activation functions (element-wise)
    x := [[0.5, -0.3], [1.2, -0.8]];
    Matrix2D->ReLU(x);       # max(0, x): [[0.5,0.0],[1.2,0.0]]
    Matrix2D->Sigmoid(x);    # 1/(1+e^-x)
    Matrix2D->Tanh(x);       # hyperbolic tangent
    Matrix2D->Softmax(x);    # probability distribution over rows

    # statistical helpers
    "Row 0 avg: {$Matrix2D->AverageRow(0, a)}"->PrintLine();  # 1.5
    "Col 1 sum: {$Matrix2D->SumColumn(1, a)}"->PrintLine();   # 6.0
    "Std dev:   {$Matrix2D->StdDevColumn(0, a)}"->PrintLine();

    # random matrices for weight initialization
    weights := Matrix2D->Random(3, 4);          # uniform [0,1]
    weights := Matrix2D->RandomNormal(0.0, 0.1, 3, 4);  # Gaussian
  }
}

Regression

Linear Regression — least-squares fit for continuous target prediction:

use System.ML;

class RegressionExample {
  function : Main(args : String[]) ~ Nil {
    # features: [size_sqft, rooms]  →  price
    X := [[800.0, 2.0], [1200.0, 3.0], [1600.0, 4.0], [2000.0, 5.0]];
    y := [[150000.0], [220000.0], [300000.0], [380000.0]];

    model := LinearRegression->New();
    if(model->Fit(X, y)) {
      preds := model->Predict([[1400.0, 3.0]]);
      "Predicted price: {$preds[0,0]}"->PrintLine();
      "R²: {$model->GetRSquared()}"->PrintLine();

      coefficients := model->GetCoefficients();
      each(i : coefficients->Size()) {
        "w[{$i}] = {$coefficients[i]}"->PrintLine();
      };
    };
  }
}

Logistic Regression — gradient descent binary classifier with sigmoid activation:

use System.ML;

class ClassifierExample {
  function : Main(args : String[]) ~ Nil {
    # features: [hours_studied, prev_score]  →  pass/fail
    X := [[2.0, 55.0], [3.0, 60.0], [7.0, 80.0], [9.0, 90.0]];
    y := [[0.0], [0.0], [1.0], [1.0]];

    model := LogisticRegression->New(0.01, 2000);
    if(model->Fit(X, y)) {
      probs   := model->Predict([[5.0, 72.0]]);
      classes := model->PredictClass([[5.0, 72.0]]);
      "Probability: {$probs[0]}"->PrintLine();
      "Predicted pass: {$classes[0]}"->PrintLine();
    };
  }
}

Neural Networks

Configurable multi-layer network trained with backpropagation. Models can be saved and reloaded:

use System.ML, Collection;

class XorNet {
  function : Main(args : String[]) ~ Nil {
    # XOR training data
    inputs  := Vector->New();
    targets := Vector->New();

    inputs->AddBack(FloatMatrixRef->New([[0.0, 0.0]])); targets->AddBack(FloatMatrixRef->New([[0.0]]));
    inputs->AddBack(FloatMatrixRef->New([[0.0, 1.0]])); targets->AddBack(FloatMatrixRef->New([[1.0]]));
    inputs->AddBack(FloatMatrixRef->New([[1.0, 0.0]])); targets->AddBack(FloatMatrixRef->New([[1.0]]));
    inputs->AddBack(FloatMatrixRef->New([[1.0, 1.0]])); targets->AddBack(FloatMatrixRef->New([[0.0]]));

    # Train: 2 inputs → 3 hidden (factor) → 1 output
    net := NeuralNetwork->Train(2, inputs, 3, 1, targets, 0.3, 10000);
    if(net <> Nil) {
      query := FloatMatrixRef->New([[1.0, 0.0]]);
      "1 XOR 0 — confidence: {$net->Confidence(query)}"->PrintLine();  # ~1.0
      "1 XOR 0 — activated:  {$net->Query(query)}"->PrintLine();       # true
      net->Store("xor.dat");
    };
  }
}

Load CSV training data with the built-in reader — it splits inputs and targets automatically:

use System.ML, Collection;

# LoadSplitMatrices: filename, target column offset, train%, line ending
splits := MatrixReader->LoadSplitMatrices("iris.csv", 4, 0.8, "\n");

# splits[0]=train_inputs  splits[1]=train_targets
# splits[2]=test_inputs   splits[3]=test_targets
train_inputs  := splits[0];
train_targets := splits[1];

net := NeuralNetwork->Train(4, train_inputs, 6, 3, train_targets, 0.05, 5000);

> obc -src xor_net.obs -lib ml
> obr xor_net

Clustering & Classification

K-Nearest Neighbors — instance-based classification over float feature vectors:

use System.ML;

class KNNExample {
  function : Main(args : String[]) ~ Nil {
    # training: [height_cm, weight_kg] with size labels
    data   := [[162.0, 55.0], [175.0, 75.0], [185.0, 90.0], [155.0, 48.0]];
    labels := ["S", "M", "L", "XS"];

    knn := KNearestNeighbors->New(data, labels);
    neighbors := knn->Query(3, [170.0, 68.0]);

    each(n in neighbors) {
      "{$n->GetCategory()}: distance={$n->GetDistance()}"->PrintLine();
    };
  }
}

K-Means Clustering — unsupervised grouping with Dunn index quality score:

use System.ML, Collection;

class ClusterExample {
  function : Main(args : String[]) ~ Nil {
    records := Vector->New();
    records->AddBack(FloatArrayRef->New([1.0, 1.5]));
    records->AddBack(FloatArrayRef->New([1.2, 1.3]));
    records->AddBack(FloatArrayRef->New([8.0, 8.5]));
    records->AddBack(FloatArrayRef->New([7.8, 8.2]));
    records->AddBack(FloatArrayRef->New([4.5, 4.0]));

    groups   := ["low", "high"];
    grouping := KMeans->Group(groups, records, 2, 0.0, 10.0);

    "Dunn Index: {$grouping->GetDunnIndex()}"->PrintLine();
    each(i : grouping->Size()) {
      g := grouping->Get(i);
      "Group '{$g->GetName()}': {$g->Size()} members"->PrintLine();
    };
  }
}

Naive Bayes — probabilistic text classification (spam detection, sentiment, etc.):

use System.ML;

class SpamFilter {
  function : Main(args : String[]) ~ Nil {
    # "ham" group (index 0)
    ham := BayesGroup->New(0.6);
    ham->AddEntry(BayesEntry->New("meeting",  15));
    ham->AddEntry(BayesEntry->New("report",   12));
    ham->AddEntry(BayesEntry->New("project",  18));

    # "spam" group (index 1)
    spam := BayesGroup->New(0.4);
    spam->AddEntry(BayesEntry->New("buy",   30));
    spam->AddEntry(BayesEntry->New("free",  25));
    spam->AddEntry(BayesEntry->New("click", 20));

    classifier := NaiveBayes->New(ham, spam);

    result := classifier->Query(["buy", "free"]);
    if(result = 1) {
      "Spam"->PrintLine();
    } else {
      "Ham"->PrintLine();
    };
  }
}

Evaluation & Preprocessing

FeatureScaler normalizes inputs before training; Metrics evaluates classifier performance:

use System.ML;

class EvalExample {
  function : Main(args : String[]) ~ Nil {
    # ── Feature scaling ──────────────────────────────
    raw := [[10.0, 200.0], [20.0, 400.0], [30.0, 600.0]];

    scaled  := FeatureScaler->MinMaxScaler(raw);    # [0, 1]
    z_score := FeatureScaler->StandardScaler(raw);  # mean=0, std=1
    l2_norm := FeatureScaler->Normalize(raw);       # L2 row normalization

    # ── Metrics ──────────────────────────────────────
    predictions := [true,  false, true,  true,  false];
    actuals     := [true,  true,  false, true,  false];

    "Accuracy:  {$Metrics->Accuracy(predictions, actuals)}"->PrintLine();
    "Precision: {$Metrics->Precision(predictions, actuals)}"->PrintLine();
    "Recall:    {$Metrics->Recall(predictions, actuals)}"->PrintLine();
    "F1 Score:  {$Metrics->F1Score(predictions, actuals)}"->PrintLine();
    "MCC:       {$Metrics->MCC(predictions, actuals)}"->PrintLine();

    cm := Metrics->ConfusionMatrix(predictions, actuals);
    Metrics->PrintConfusionMatrix(cm);

    # ── Train/test split ─────────────────────────────
    data   := [[1.0, 2.0], [3.0, 4.0], [5.0, 6.0], [7.0, 8.0], [9.0, 10.0]];
    splits := CrossValidation->TrainTestSplit(data, 0.2);  # 80/20
    train  := splits[0]->Get();
    test   := splits[1]->Get();
    "Train rows: {$train->Size()}, Test rows: {$test->Size()}"->PrintLine();
  }
}

> obc -src eval.obs -lib ml
> obr eval

ONNX Local Inference

Run ONNX models locally with hardware acceleration: DirectML (Windows), CUDA (Linux), CoreML (macOS). CPU inference requires no GPU. Models load from local files — no internet at runtime.

Face Recognition

Uses InsightFace buffalo_l: SCRFD 10G-KPS detector + ArcFace R50 512-dim embeddings.

curl -L -o buffalo_l.zip https://github.com/deepinsight/insightface/releases/download/v0.7/buffalo_l.zip
unzip buffalo_l.zip   # det_10g.onnx and w600k_r50.onnx

use API.Onnx, System.IO.Filesystem;

session := FaceSession->New("det_10g.onnx", "w600k_r50.onnx");

img1 := FileReader->ReadBinaryFile("person_a.jpg");
img2 := FileReader->ReadBinaryFile("person_b.jpg");

r1 := session->Recognize(img1, 0.5);
r2 := session->Recognize(img2, 0.5);

if(r1->GetSize() > 0 & r2->GetSize() > 0) {
  emb1 := r1->GetResults()[0]->GetEmbedding();
  emb2 := r2->GetResults()[0]->GetEmbedding();
  sim  := FaceSession->Compare(emb1, emb2);
  "Similarity: {$sim}"->PrintLine();
  "Same person: {$(sim > 0.35)}"->PrintLine();
};
session->Close();

Object Detection (YOLO)

use API.Onnx, System.IO.Filesystem;

labels := String->New[80];   # COCO class labels
labels[0] := "person"; labels[1] := "bicycle"; # ... fill all 80

session := YoloSession->New("yolov11n.onnx");
img     := FileReader->ReadBinaryFile("street.jpg");
result  := session->Inference(img, 640, 640, 0.5, labels);

each(d in result->GetClassifications()) {
  "{$d->GetLabel()}: {$d->GetConfidence()}"->PrintLine();
};
session->Close();

Phi-3 Mini (Local SLM)

Run Microsoft's Phi-3 Mini locally — no internet at inference time. (~2 GB model)

huggingface-cli download microsoft/Phi-3-mini-4k-instruct-onnx \
  --include "directml/directml-int4-awq-block-128/*"

use API.Onnx, System.IO.Filesystem;

tokenizer := Phi3Tokenizer->New("tokenizer.json");
session   := Phi3Session->New("phi3-mini-4k-instruct.onnx");

prompt    := "<|user|>\nWhat is the capital of France?<|end|>\n<|assistant|>\n";
token_ids := tokenizer->Encode(prompt);
eos       := Int->New[1]; eos[0] := 32007;

result    := session->Generate(token_ids, 200, 0.7, eos);
tokenizer->Decode(result->GetTokenIds())->PrintLine();
session->Close();

Computer Vision (OpenCV)

use API.OpenCV;

class VisionExample {
  function : Main(args : String[]) ~ Nil {
    # load, process, save
    image   := Image->New("photo.jpg");
    gray    := image->ToGray();
    blurred := gray->GaussianBlur(5, 5);
    edges   := blurred->Canny(50, 150);
    edges->Save("edges.jpg");

    # face detection via Haar cascade
    detector := FaceDetector->New("haarcascade_frontalface_default.xml");
    faces    := detector->Detect(image);
    "Faces detected: {$faces->Size()}"->PrintLine();

    # resize and color space conversion
    resized := image->Resize(320, 240);
    resized->ToHsv()->Save("hsv_output.jpg");
  }
}

Natural Language Processing

Built-in NLP primitives — no model download required. Pure Objeck bytecode.

use API.ML.NLP;

class NLPExample {
  function : Main(args : String[]) ~ Nil {
    # sentiment
    SentimentAnalyzer->Classify("This product is absolutely wonderful!")->PrintLine();  # "positive"

    # TF-IDF vectorization
    docs := String->New[3];
    docs[0] := "cats are pets";
    docs[1] := "dogs are pets";
    docs[2] := "birds can fly";

    tfidf := TF_IDF->New();
    tfidf->Fit(docs);
    vector := tfidf->Transform("cats and dogs");
    each(v in vector) { v->PrintLine(); };

    # cosine similarity
    sim := TextSimilarity->Cosine("hello world", "hello there");
    "Similarity: {$sim}"->PrintLine();

    # tokenization
    tokens := Tokenizer->Tokenize("The quick brown fox");
    each(t in tokens) { t->PrintLine(); };
  }
}

> obc -src nlp.obs -lib gen_collect,nlp
> obr nlp

Quick Reference

Capability	Class	Library flag	Key
Chat / text	Response	openai	OpenAI
Vision (image input)	Response + ImageQuery	openai	OpenAI
Realtime audio	Realtime	openai,sdl2	OpenAI
Text embeddings	Embedding	openai	OpenAI
Content moderation	Moderation	openai	OpenAI
Batch processing	Batch	openai	OpenAI
Gemini chat / vision	Model::GenerateContent	gemini	Gemini
Search grounding	Model::GenerateContentWithGrounding	gemini	Gemini
File upload	FileManager	gemini	Gemini
Context caching	CachedContent	gemini	Gemini
Gemini embeddings	Model::EmbedContent / BatchEmbedContent	gemini	Gemini
Local chat / generation	Completion, Chat	ollama	None
Local embeddings	Model::Embeddings	ollama	None
Matrix algebra	Matrix2D	ml	None
Linear regression	LinearRegression	ml	None
Logistic regression	LogisticRegression	ml	None
Neural network	NeuralNetwork	ml	None
K-nearest neighbors	KNearestNeighbors	ml	None
K-means clustering	KMeans	ml	None
Naive Bayes	NaiveBayes	ml	None
Feature scaling	FeatureScaler	ml	None
Model evaluation	Metrics, CrossValidation	ml	None
Face recognition	FaceSession	onnx	None
Object detection	YoloSession	onnx	None
Local SLM	Phi3Session	onnx	None
Computer vision	Image, FaceDetector	opencv	None
Sentiment / TF-IDF	SentimentAnalyzer, TF_IDF	nlp	None

Model Recommendations

Task	OpenAI	Gemini	Ollama (local)
General chat	gpt-4o-mini	gemini-2.0-flash	llama3.2
Reasoning	o3-mini	gemini-2.5-pro	qwen2.5
Vision	gpt-4o	gemini-2.0-flash	llava
Realtime audio	gpt-4o-realtime-preview	—	—
Text embeddings	text-embedding-3-small	text-embedding-004	nomic-embed-text
Fast & cheap	gpt-4o-mini	gemini-2.5-flash	phi3

Example Programs

Full working examples in programs/frameworks/: