This repository contains the native TypeScript compiler and language server. The source directories of interest that we have are: Most compiler development takes place in tsc/internal, and most behaviors can be tested via compiler tests. Most development on the codebase is in Go. Standard Go commands and practices apply, but we primarily use a tool called hereby to build, run tests, and other tasks. Run npx hereby --tasks to see all available commands. Always make sure code is formatted, linted,…
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How to write, run, and debug compiler tests and fourslash (LSP) tests in the TypeScript repository. Covers test file formats, directives, markers, baseline management, and the fourslash verification API.
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Are you doing security research on this repo? This document covers what guarantees and non-guarantees are provided. Consult this document before reporting a security issue or conducting security research.
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These rules apply to all public contributions and interactions, no matter how they're done. The entity operating or authorizing the contributions and interactions is responsible for them. AI assistance does not relieve contributors of responsibility for their work. "The AI did it" is not an excuse. Violations may result in contributions being closed without further comment. Cases of deception, evasion, or repeat violations may result in account bans. Allowed: - All AI usage that remains non-public (e.g. questions, reviews, local…
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playwright-chromium, playwright-firefox, playwright-webkit — per-browser distributions. playwright-browser-chromium, playwright-browser-firefox, playwright-browser-webkit — binary packages. Assume watch is running and code is up to date. Generated files (types, channels, validators) are produced by watch automatically. Runs all lint checks in parallel: eslint, tsc, doclint, check-deps, generate_channels, generate_types, lint-tests, test-types, lint-packages, code-snippet linting, check-dependency-age (every version in package-lock.json must be at least 7 days old). Run flint only before you upload a PR, and only after npm run build. Do not run it before…
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Produce the "Playwright 1.xx API Review" artifact for a range of commits - the public API additions and the breaking or behavior changes that affect existing users since the last API review or since the last release, ordered by impact, each with links, before/after snippets and a documentation check. Covers microsoft/playwright (Node.js) and the Python, Java and .NET ports. Use when asked for an API review, to review API changes, or to check what changed in the public API since a release or since the last review.
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Roll the runtime dependencies that npm audit flags with a moderate or higher advisory to safe versions that are at least 8 days old, and commit them with a table of every package the lock file change touched (old and new version, publish date, weekly downloads). Use when asked to fix audit findings, bump vulnerable or outdated runtime dependencies, or update package-lock.json for an advisory.
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Cherry-pick a commit or PR from main into a release branch (release-<version>) and retitle it as cherry-pick(#<pr>): <original title>. Use when asked to cherry-pick, backport, or port a change into a release.
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Write the release notes for a Playwright release - the Node.js notes in docs/src/release-notes-js.md together with the Python, Java and .NET translations, and the GitHub markdown for each language's release. Use when asked to write, translate or publish release notes.
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Query Playwright CI test results from the aggregated DuckDB database. Answers questions about flaky tests, failure rates, slow tests, and per-run/SHA/PR results without hunting through GitHub artifacts.
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Triage and fix one microsoft/playwright issue, or do a maintainer's task, unattended inside the Issue triage GitHub Actions workflow (.github/workflows/triage.yml), which a needs-triage, needs-triage-mac or needs-triage-win label starts, or a maintainer starts by hand with an issue, a task or both. Reproduces the issue on the runner, then leaves a verified fix proposal for the workflow to open as a draft PR, a test that covers a scenario that did not reproduce, an investigation note for it to post on the issue, or a browser bug report for it to file in microsoft/playwright-browsers or for a maintainer to file at crbug.com. Only for that workflow.
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Set up component testing with Playwright using a story gallery — scaffold stories and a gallery dev page driven by the built-in mount fixture, no dedicated component-testing runtime. Use when asked to test React or Vue components in isolation with Playwright, or to migrate off @playwright/experimental-ct-react / -vue.
3 projects use a version of this
100k16d agoReviewMountCreate a free account to mount
Plain text files in a repository that tell a coding agent how the project works: commands to run, conventions to follow and things to avoid. CLAUDE.md, AGENTS.md, cursor rules and skills are the common kinds.
CLAUDE.md or AGENTS.md?
CLAUDE.md is read by Claude Code. AGENTS.md is an open format that Codex, Cursor and other agents read. Many projects keep one and point the other at it.
What is a skill?
A folder with a SKILL.md that describes one capability, such as filling PDFs or reviewing code. The agent loads it only when the task calls for it.
Can I search my own team's files too?
Your agents already can, over MCP, limited to the files you're allowed to read. Searching them from this page is coming.