# What's new in May 2025 | Checkly Changelog

> Checkly changelog: Checkly AI: Playwright Impact Analysis and Error Explainer in beta, Playwright Check Suites alpha, 1-second API check frequency, A sidebar that scales

Source: https://www.checklyhq.com/changelog/whats-new-in-may-2025/

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# What's new in May 2025

Published May 7, 2025

## Checkly AI: Playwright Impact Analysis and Error Explainer in beta

Our first two AI-assisted features are in beta. Impact Analysis generates a concise summary for every failing Playwright test focused on end-user impact; if a failed test has a trace file, an Analyze with AI button kicks off the analysis. The Explain Error button above every Playwright error message explains why a script failed and how to fix it, with example code and links to relevant documentation. Both features are free for all users during the beta.

## Playwright Check Suites alpha

Promote Playwright tests to synthetic monitors straight from your codebase. Use `pwTags` and `pwProjects` to pick the tests you care about, set custom `Frequency` and `Locations` in your `checkly.config.ts`, and they run globally as often as you need. Includes custom code dependencies read from your `package.json`, multiple browsers and viewports, dependencies between tests or projects, and support for npm, pnpm, and yarn.

[Try it →](https://app.checklyhq.com/checks/playwright/create)

## 1-second API check frequency

You can now run API checks every second, useful for APIs with strict SLOs or high availability requirements. Available upon request to Enterprise customers.

## A sidebar that scales

We rebuilt the sidebar with a developer-first layout, logical groupings, and cleaner information architecture, making it faster to locate product sections, create new resources, and configure your setup.

## Also shipped

- **Runtime:** [Runtime 2025.04 is generally available with Playwright 1.51.1 and Node.js v22.11.0. Checkly agent 6.0.0 ships with both runtime 2024.09 and 2025.04.](https://www.checklyhq.com/docs/runtimes/specs/)
- **Analytics API:** [The `/v1/analytics/*` endpoints now expose retry data per check: `totalCheckRuns`, `checkRunsWithRetries`, and `checksWithRetriesPercentage`.](https://www.checklyhq.com/docs/analytics/)
- **Editors:** Several code editors in the app, like the webhook alert channel editor, are now resizable by dragging the corner.
- **Private locations:** Checkly agent v5.0.0 adds the `USE_OS_DNS_RESOLVER` env var so TCP checks can resolve DNS via `getaddrinfo`, enabling resolution of internal services such as those in the same Kubernetes cluster.
- **Alerting:** Degraded-check notifications now respect your alert configuration instead of firing on the first degradation.
- **Failover:** If a private location becomes unavailable, assigned checks are paused instead of falling back to a public location, avoiding false alerts.