How I Migrated 90 Cypress Tests to Playwright With Claude Code in 4 Days

7.5 relevance

Detailed migration guide using Claude Code; highly actionable and relevant to AI-assisted dev.

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Why It Matters

For a Solutions Architect focused on AI agent orchestration and developer experience, this demonstrates a practical pattern for using LLM agents to automate high-volume, pattern-heavy migration tasks, reducing estimated effort from sprints to days.

Key Takeaways

Build a rulebook from a single manual translation, then batch-process remaining specs with an AI agent, verifying each with repeated runs and screenshot diffs.

How I Migrated 90 Cypress Tests to Playwright With Claude Code in 4 Days

Summary

A developer migrated 90 Cypress specs to Playwright in four days using Claude Code v2.1.x on Node.js 22 with Playwright 1.54. The process began with hand-translating one checkout spec to extract 14 rules into MIGRATION_RULES.md, then running the agent in batches of five specs per session, each spec run three times before acceptance. A screenshot-diff gate caught silent behavior drift, while two traps—mapping custom Cypress commands to Playwright fixtures and converting cy.intercept globs to page.route minimatch—cost a day.

Author

yureki_lab