Hey Rustaceans!

I built CILens, a CLI tool for analyzing GitLab CI/CD pipelines, written in Rust!

I've been using it at my company and it's given me really interesting insights into our CI/CD pipelines—particularly useful for DevOps, platform, and infra engineers who need to optimize build times and identify reliability issues.

What it does:

• Fetches pipeline & job data from GitLab's GraphQL API
• Groups pipelines by job signature (smart clustering)
• Shows P50/P95/P99 duration percentiles instead of misleading averages
• Detects flaky jobs (intermittent failures)
• Calculates time-to-feedback per job (actual dev wait times)
• Outputs human-readable summaries or JSON for programmatic use

The Rust bits I'm proud of:

• Async/await with Tokio - 500 concurrent requests with backpressure
• Intelligent caching (~90% cache hit rate on reruns)
• Type-safe GraphQL client (graphql_client)
• Zero-copy deserialization with serde
• 181 unit tests, zero clippy warnings (pedantic mode)
• Cross-platform builds (cargo-dist)

Currently supports GitLab only, but the architecture is designed to support integrations with other CI/CD providers (GitHub Actions, Jenkins, CircleCI, etc.).

Feedback welcome! Especially interested in hearing from folks who've built similar analysis tools or worked with large-scale API fetching.

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