Turn GitHub Actions runs into HTML, Chromium, Speedscope, and OpenTelemetry traces to quickly find bottlenecks, slow steps, and flaky tests.

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Meziantou.GitHubActionsTracing is a .NET global tool that converts GitHub Actions workflow runs into timeline-based trace data. It exports to multiple formats including interactive HTML, Chromium trace JSON, Speedscope JSON, and OpenTelemetry. The tool helps diagnose slow or flaky CI pipelines by visualizing job/step durations, MSBuild targets, and test results as flamegraphs and swimlanes. It supports filtering noisy spans, offline reuse of downloaded run data, automated trace export via workflow_run triggers, and a webhook receiver server for continuous automated processing.

Visualize GitHub Actions runs with Meziantou.GitHubActionsTracing

# Why GitHub Actions runs are hard to diagnose

# What Meziantou.GitHubActionsTracing exports

# Quick start: export a run to a timeline

# Automate trace export when a workflow completes

# Optional: process runs automatically with the webhook receiver