core

Core Samples

These samples cover the foundational operations of the LayerLens Python SDK. They address the core problem every AI team faces: how to systematically trace, evaluate, and improve LLM interactions across your application. Start here to build familiarity with the SDK before exploring domain-specific or advanced patterns.

Prerequisites

pip install layerlens --index-url https://sdk.layerlens.ai/package
export LAYERLENS_STRATIX_API_KEY=your-api-key

Quick Start

Run quickstart.py for a minimal end-to-end walkthrough that creates a trace, defines a judge, and runs an evaluation in under 30 lines of code:

python quickstart.py

Expected output: a trace ID, judge ID, and evaluation summary printed to the console.

Samples

File	Scenario	Description
quickstart.py	First-time setup	Minimal end-to-end example covering trace creation, judge setup, and evaluation in a single script.
basic_trace.py	Observability engineers instrumenting LLM calls	Create, retrieve, and manage trace records for individual LLM interactions.
run_evaluation.py	QA leads running scheduled quality checks	Execute a full evaluation lifecycle: configure judges, submit traces, and collect scored results.
create_judge.py	Platform teams defining quality standards	CRUD operations for judge resources -- create, read, update, and delete evaluation judges.
trace_evaluation.py	Developers validating prompt changes	Evaluate traced LLM interactions against one or more judges to detect regressions.
benchmark_evaluation.py	ML teams comparing model performance	Run a model against a benchmark, wait for completion, retrieve and analyze scored results.
judge_optimization.py	ML engineers tuning evaluation criteria	Programmatically refine judge configurations to improve scoring precision and recall.
compare_evaluations.py	Teams comparing prompt or model variants	Compare scored results across multiple evaluation runs to identify the best-performing configuration.
async_workflow.py	High-throughput pipelines	Asynchronous SDK usage for non-blocking trace uploads and evaluation submissions.
model_benchmark_management.py	Platform teams cataloging models	Register models and benchmarks, then query benchmark results for reporting.
integration_management.py	Teams managing LayerLens integrations	List, inspect, and test configured integrations using the client.integrations API.
custom_model.py	Teams using private or fine-tuned models	Register and manage custom model definitions within the LayerLens model catalog.
custom_benchmark.py	Teams defining proprietary test suites	Create and run custom benchmarks tailored to your application's specific quality criteria.
trace_investigation.py	On-call engineers debugging production issues	Investigate traces for errors, high latency, and anomalous token usage patterns.
evaluation_pipeline.py	CI/CD and batch workflows	Orchestrate a multi-step evaluation pipeline combining judges, traces, and result aggregation.
evaluation_filtering.py	Analysts querying evaluation history	Filter and paginate evaluation results by status, date range, judge, or score threshold.
paginated_results.py	Large-scale data retrieval	Demonstrate cursor-based pagination for traces, evaluations, and judge listings.
public_catalog.py	Teams exploring built-in judges	Browse and query the public judge and model catalog provided by LayerLens.
judge_creation_and_test.py	Compliance teams building PII detectors	Create a custom PII judge, run it against sample traces, and verify detection accuracy.
async_results.py	Polling for long-running evaluations	Submit evaluations asynchronously and poll for completion with timeout handling.

Expected Behavior

Each sample prints its results to stdout. Trace and evaluation IDs are generated server-side and will differ between runs. Samples that create resources (judges, evaluations) will persist those resources in your LayerLens workspace unless explicitly deleted.