# Manual Testing > Run a manual test of the current change end-to-end and output reproducible test instructions for the PR "Test instructions" section. - Skill: `datadog/manual-testing` (Agent Skill) - Install (CLI): `npx skillmds@latest add datadog/manual-testing` - Raw SKILL.md: https://api.skillmd.com/api/skills/datadog/manual-testing/raw - Safety review: pending - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Coding & Dev Tools - Author: datadog (https://skillmd.com/u/datadog) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/datadog/manual-testing --- ## Step 1: Understand the change If you don't have the PR changes in memory, review all commits in the PR to identify what SDK behavior changed and what events/fields need to be verified. ## Step 2: Start the dev server The dev server serves the `sandbox/` directory and proxies intake requests locally. Use `yarn dev-server --help` to list all available commands. ```bash yarn dev-server start ``` ## Step 3: Create a temporary sandbox page Create `sandbox/test-.html`. See `sandbox/index.html` for a minimal example. Include only the elements needed to exercise the change. Always use `proxy: '/proxy'`. ```bash cat > sandbox/test-.html << 'EOF' Test <topic> EOF ``` ## Step 4: Run the test flow Get the dev server URL from `yarn dev-server status`. Clear any previous intake data, open the page, interact with it using CSS selectors, flush events by opening a new tab or reloading, then inspect the intake: ```bash yarn dev-server intake clear agent-browser open /test-.html agent-browser click '#...' agent-browser tab new yarn dev-server intake | jq '' ``` Use `yarn dev-server intake --help` to find the right selector. To evaluate JavaScript on the page (e.g. to inspect `window` state set by `beforeSend`), switch focus back to tab 0 first, then use `agent-browser eval`: ```bash agent-browser tab 0 agent-browser eval 'window.someValue' ``` ## Step 5: Verify the output matches expectations, then present the test instructions Output a self-contained bash snippet with the exact commands run and the expected output. This goes directly into the PR "Test instructions" section. ## Step 6: Clean up ```bash yarn dev-server stop rm sandbox/test-.html ```