50 skills
The JavaScript / Wasm runtime that powers Cloudflare Workers
checked 4d ago
Ship a risky change behind a feature gate
Walks through adding an autogate to workerd—registering the enum, mapping the string, wiring usage, and writing tests—so you can roll out safely and revert fast.
·★8.3k↓0
checked 4d ago
Locate and run a test in workerd
Navigates the workerd test hierarchy (wd-test, kj_test targets, bazel patterns) and runs the right test for your change — including parent-project integration tests when needed.
·★8.3k↓0
checked 4d ago
Keep your bug hunt organized and searchable
Creates a structured investigation log that grows with you through a bug hunt—capturing what you've checked, dead ends, and partial findings so you don't re-derive the same conclusions or lose the thread.
·★8.3k↓0
checked 4d ago
Uncover skills from linked projects
Detects when your work spans multiple repos or projects and surfaces relevant skills from parent projects, reducing context-switching and duplication.
·★8.3k↓0
checked 4d ago
Give feedback on code without sounding harsh
Structures a PR review with suggested edits, tone guardrails, and templates so feedback lands as helpful rather than critical. Works with GitHub CLI.
·★8.3k↓0
checked 4d ago
Catch Rust safety issues in workerd code
Reviews Rust code for unsafe patterns, CXX FFI correctness, JSG resource leaks, and error handling. Runs through a domain-specific checklist tuned for workerd's C++ interop.
·★8.3k↓0
checked 4d ago
Update V8 in workerd without breaking the build
Walks through the full sequence for bumping V8: rebasing patches, updating hashes, verifying integrity, and testing. Catches the order-dependent steps that break silently.
·★8.3k↓0
checked 4d ago
Set up commit categories for your changelog
Defines which file paths and commit messages map to which changelog sections (Features, Bugfixes, Docs, etc.). Load this once, then reference it in changelog generation.
·★8.3k↓0
checked 4d ago
Verify the fix actually works before shipping
Runs the relevant test suite, build steps, or integration checks and confirms output against the original problem statement before allowing a "done" claim.
·★8.3k↓0
checked 4d ago
Add a compatibility flag to workerd
Walks through the full checklist: schema changes, C++ wiring, test coverage, and docs. Catches the easy mistakes that block a PR.
·★8.3k↓0
checked 4d ago
Run bazel tests without hidden false passes
Enforces hygiene rules before bazel test runs—clears caches, validates filter flags, and catches partial test matches that silently pass. Prevents confident bugs from stale results.
·★8.3k↓0
checked 4d ago
Know who you are before reviewing code
Detects your GitHub identity and git commits so code-review findings can reference your own prior comments and approvals — avoiding duplicate feedback and spotting patterns only you'd notice.
·★8.3k↓0
checked 4d ago
Draft copy that pastes cleanly into any platform
Formats drafts as markdown so bold, lists, code blocks, and links stay intact when you copy them into GitHub, Jira, Notion, or your wiki — no reformatting after paste.
·★8.3k↓0
checked 4d ago
Debug module-registry issues in workerd
Helps engineers navigate workerd's module registry, troubleshoot resolution and compilation errors, and review registration code against the three reference specs.
·★8.3k↓0
checked 4d ago
Pressure-test code review feedback before you act
Takes a reviewer's comment and checks it for logical consistency, testing implications, and hidden assumptions — surfaces when feedback is vague, contradicts the codebase, or misses context.
·★8.3k↓0
checked 4d ago
Find a bug by writing a test for it
Guides you to write a minimal, failing test that reproduces the bug, then narrows the cause by toggling code until the test passes. Faster than reading logs.
·★8.3k↓0
checked 4d ago
Review C++ code against workerd style rules
Applies Cloudflare's C++ style guidelines (naming, memory management, error handling, constness) to pull requests or code snippets in the workerd codebase.
·★8.3k↓0
checked 4d ago
Review workerd code for perf and web-standard fit
Examines workerd API patches for performance regressions, web-standards compliance, security gaps, and compatibility flags. Flags tcmalloc tradeoffs and autogates misalignment.
·★8.3k↓0
checked 4d ago
Spot memory and thread bugs in C++ code
Reviews C++ for unsafe lifetime patterns, V8/KJ boundary hazards, cross-thread access, and coroutine pitfalls—catches the subtle errors human review often misses in workerd-style systems code.
·★8.3k↓0
Vite plugin that reimplements the Next.js API surface — deploy anywhere
Build and deploy AI Agents on Cloudflare
checked 4d ago
Map out how to hunt down a bug
Takes a vague "the feature is broken" report and produces a step-by-step investigation checklist—what to check first, which logs matter, how to reproduce it.
·★5k↓0
checked 4d ago
Turn a changelog into customer-ready release notes
Takes a list of commits, issues, or PRs and writes short, benefit-focused release notes that help customers understand what changed and why.
·★5k↓0
checked 4d ago
Write a test plan before shipping
Takes a feature description or PRD snippet and produces a structured test plan: happy path, edge cases, and a checklist QA can follow to sign off.
·★5k↓0
Cloudflare’s documentation
checked 4d ago
Explain jargon to anyone in plain language
Strips technical terms down to metaphors and analogies that stick. Shows the before (confusing jargon) and after (what it actually means) side by side with concrete examples.
·★4.8k↓0
checked 4d ago
Consolidate code review feedback into one list
Merges automated linter output, bot findings, and human comments on a pull request into a deduplicated, prioritized list grouped by severity and area.
·★4.8k↓0
checked 4d ago
Catch style violations before merging docs
Scans changed MDX files in a pull request and flags tone, formatting, and structure mismatches against your style guide with line-by-line suggestions.
·★4.8k↓0
checked 4d ago
Publish a polished product changelog entry
Turns a feature brief into a properly formatted MDX changelog entry with frontmatter, consistent tone, and links—ready to merge into your docs site.
·★4.8k↓0
checked 4d ago
Catch docs quality issues before merge
Reviews a docs PR for frontmatter, MDX syntax, component usage, style-guide fit, and accuracy. Posts line-by-line suggestions directly to GitHub.
·★4.8k↓0
checked 4d ago
Assess whether a dependency update breaks your docs
Reviews a Dependabot PR, finds what actually changed in each bumped package, maps those changes to your codebase, and predicts real breakage risk before you merge.
·★4.8k↓0
checked 4d ago
Draft a pull request for docs changes
Writes a PR title and body that follow Cloudflare's conventions, fills the docs checklist, and formats commits so they land cleanly without back-and-forth.
·★4.8k↓0
checked 4d ago
Flag spam and off-topic GitHub issues
Reads a GitHub issue or PR and flags whether it's spam, off-topic, or a legitimate request for the docs repo—with a reason you can paste in a comment.
·★4.8k↓0
⛅️ Home to Wrangler, the CLI for Cloudflare Workers®
Cloudflare's component library for building modern web applications.
Skills for teaching agents how to build on Cloudflare.
checked 4d ago
Scaffold a stateful backend on Cloudflare
Generates Durable Objects boilerplate for real-time coordination: chat rooms, multiplayer sync, booking systems. Includes SQLite schema, WebSocket handlers, and wrangler config.
·★1.7k↓0
checked 4d ago
Catch Cloudflare Workers pitfalls before production
Reviews your Workers code and wrangler config against production gotchas: floating promises, global state, secrets exposure, streaming edge cases. Flags anti-patterns with fixes.
·★1.7k↓0
checked 4d ago
Deploy and configure Cloudflare infrastructure
Helps you set up Workers, Pages, KV storage, D1 databases, WAF rules, tunnels, and AI features. Writes Terraform or Pulumi code and troubleshoots config issues.
·★1.7k↓0
checked 4d ago
Deploy serverless code to Cloudflare Workers
Runs wrangler commands to deploy, configure, and manage Workers projects — handles KV storage, R2 buckets, databases, and secrets with correct syntax and best practices baked in.
·★1.7k↓0
checked 4d ago
Run untrusted code without crashing your app
Wraps code execution in isolated sandboxes so a user's script can't access your database, leak secrets, or fork bomb your servers. Handles file I/O, previews, and lifecycle.
·★1.7k↓0
Run sandboxed code environments on Cloudflare's edge network
checked 4d ago
Wire up structured logging in your codebase
Shows how to inject a Logger, create child loggers scoped to a module, configure via environment variables, and mock logs in tests without boilerplate.
·★1k↓0
checked 4d ago
Debug shell commands and session state
Walks through session.ts logic, command handlers, and stdout/stderr streams to spot why a shell invocation hangs, fails silently, or returns garbled output.
·★1k↓0
checked 4d ago
Ship code changes without breaking version sync
Guides your team through the changeset format, release-notes language, and version-bump automation so npm and Docker tags stay in sync and users see what changed.
·★1k↓0
checked 4d ago
Debug a local dev example or add a new one
Helps you spin up, troubleshoot, and extend example projects in the examples/ directory using wrangler dev and Docker. Explains EXPOSE directives and the local dev loop.
·★1k↓0
checked 4d ago
Learn how a request flows through the system
Explains the three-layer architecture, client pattern, and container lifecycle—where a request enters, which services touch it, and where to add new logic for a new capability.
·★1k↓0
checked 4d ago
Review TypeScript code against house rules
Checks a code review or new PR against your team's TypeScript conventions: type discipline, naming style, comment etiquette. Catches style drift before merge.
·★1k↓0
checked 4d ago
Test code against a live Sandbox without wrangler
Connects to a running Sandbox deployment and runs HTTP requests against it—no local dev server needed. Validates SDK changes, reproduces bugs, or explores the API in a live environment.
·★1k↓0
checked 4d ago
Write tests that match your codebase style
Learns your project's test conventions—where files live, what you mock, unit vs E2E patterns—then generates new tests that fit seamlessly into your existing suite.
·★1k↓0
ArtifactFS is a filesystem driver designed to mount large git repos as quickly as possible, hydrating file contents on-the-fly instead of blocking on the initial clone. It's ideal for agents, sandboxes, containers and other use-cases where startup time is critical.
OpenAPI 3 and 3.1 schema generator and validator for Hono, itty-router and more!
Export Cloudflare metrics to Prometheus. Built on Cloudflare Workers with Durable Objects for stateful metric accumulation.
Astro integration for localization and automated AI translation of content