Skill: playwright

What I do

I provide expertise in Playwright browser automation via the Playwright MCP server. This includes navigation, form interaction, state snapshots, and debugging for reliable browser-based automation and testing.

When to use me

• Automating browser-based workflows (navigation, filling forms, clicking)
• Taking page snapshots and screenshots for visual verification
• Interacting with complex web applications (dialogs, file uploads, drag-and-drop)
• Debugging browser state via console logs and network requests
• Managing browser tabs and resizing viewports

Core principles

1. Snapshot-first workflow - Always take a snapshot (browser_snapshot) before interacting to get stable element references.
2. Actionable references - Prefer using element IDs or stable selectors from snapshots over brittle CSS paths.
3. Wait for state - Use browser_wait_for instead of arbitrary delays to ensure the UI is ready for interaction.
4. Deterministic interaction - Perform one action at a time and verify the result via a new snapshot or assertion.
5. Clean cleanup - Always close the browser session (browser_close) when the task is complete.

Patterns & examples

Stable interaction flow:

// 1. Navigate to target
await skill_mcp(mcp_name="playwright", tool_name="browser_navigate", arguments={ url: "https://example.com/login" });

// 2. Take snapshot to find element IDs
const snapshot = await skill_mcp(mcp_name="playwright", tool_name="browser_snapshot");

// 3. Fill form using IDs from snapshot
await skill_mcp(mcp_name="playwright", tool_name="browser_fill_form", arguments={ selector: "#email", value: "[email protected]" });
await skill_mcp(mcp_name="playwright", tool_name="browser_fill_form", arguments={ selector: "#password", value: "secret123" });
await skill_mcp(mcp_name="playwright", tool_name="browser_click", arguments={ selector: "button[type='submit']" });

Waiting for results:

// Wait for specific element to appear after action
await skill_mcp(mcp_name="playwright", tool_name="browser_wait_for", arguments={ selector: ".dashboard-ready" });

// Verify state via console check or snapshot
const logs = await skill_mcp(mcp_name="playwright", tool_name="browser_console_messages");

Anti-patterns to avoid

• ❌ Arbitrary time-based sleeps (use browser_wait_for instead)
• ❌ Interacting without a fresh snapshot (risks stale element references)
• ❌ Using brittle CSS/XPath selectors (prefer IDs or stable roles from snapshots)
• ❌ Leaving browser sessions open (always browser_close to save resources)
• ❌ Ignoring console errors or failed network requests when debugging

KB Reference

~/vaults/baphled/3. Resources/Knowledge Base/AI Development System/Skills/Testing-BDD/Playwright.md

Related skills

• javascript - Core language for complex evaluation scripts
• cypress - Alternative browser testing framework
• e2e-testing - General end-to-end testing patterns
• bdd-workflow - Driving browser automation from behaviour specs