openllmetry: Instructions file for Claude Code

OpenLLMetry Repository Guide

Repository Structure

This repository contains multiple PyPI-publishable packages organized and orchestrated using Nx workspace management.

Nx Workspace Commands

# Run tests across all packages
nx run-many -t test

# Run linting across all packages
nx run-many -t lint

# Update lock files across all packages
nx run-many -t lock

# Run specific targets on specific packages
nx run <package-name>:test
nx run <package-name>:lint

# Show project graph
nx graph

# Show what's affected by changes
nx affected:test
nx affected:lint

Package Management

All packages use uv as the package manager. Always execute commands through uv:

uv run <command>

Testing with VCR Cassettes

Tests utilize VCR cassettes for API calls.

Commands

# Run tests normally (uses existing cassettes)
uv run pytest tests/

# Re-record all cassettes (requires API keys)
uv run pytest tests/ --record-mode=all

# Record only new test episodes
uv run pytest tests/ --record-mode=new_episodes

# Record cassettes once (if they don't exist)
uv run pytest tests/ --record-mode=once

# Run tests without recording (fails if cassettes missing)
uv run pytest tests/ --record-mode=none

# Run specific test files
uv run pytest tests/test_agents.py --record-mode=once

Guidance

Re-record cassettes when API interactions change to ensure test accuracy. Never commit secrets or PII. Scrub them using VCR filters (e.g., filter_headers, before_record) or your test framework's equivalent. Store API keys only in environment variables/secure vaults; never in code or cassettes. Typical record modes you may use: once, new_episodes, all, none (choose per test needs). Creating new cassettes requires valid API keys (OpenAI, Anthropic, etc.); ask the user to provide them if needed.

Debugging with Console Span Exporter

For debugging OpenTelemetry spans and hierarchy issues, use the console exporter:

from opentelemetry.sdk.trace.export import ConsoleSpanExporter
from traceloop.sdk import Traceloop

Traceloop.init(
    app_name="debug-app",
    exporter=ConsoleSpanExporter(),
    # other config...
)