Design, implement, and review XState v5 state machines and @xstate/react integrations in TypeScript. Use when modeling finite workflows, async actors, statecharts, guarded transitions, delayed transitions, actor systems, or machine-driven React behavior.
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See how to installReview the instructions the agent will receive before you install.
Use XState when the domain has meaningful modes, transitions, async lifecycle, cancellation, guards, delays, or actor boundaries. The goal is not "state management"; the goal is to make the process explicit, typed, inspectable, and hard to misuse.
setup({ types, actors, actions, guards, delays }).createMachine(...) for typed machines with named implementations.invoke.input.matches, hasTag, can, and selected context.input.setup(...); replace runtime implementations with .provide(...).Read only the references needed for the task:
fromPromise, request input, output, errors, abort signals.sendBack, receive, cleanup.invoke, spawn, spawnChild, child ownership, inspection.@xstate/react, .provide(...), actor input, selectors.waitFor, provided implementations, timing.No reviews yet. Tell others what you thought.
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Automates browser interactions for web testing, form filling, screenshots, and data extraction. Use when the user needs to navigate websites, interact with web pages, fill forms, take screenshots, test web applications, or extract information from web pages.
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A scoring scale for evaluating how well a CLI is designed for AI agents, based on the "Rewrite Your CLI for AI Agents" principles.
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Score a repository's agentic legibility from repo-visible evidence only. Use when Codex needs to audit how easy a codebase is for coding agents to discover, bootstrap, validate, and navigate, especially for harness-engineering reviews, developer-experience audits, repo cleanup, or before/after comparisons after improving docs, tooling, or architectural constraints.
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Expert in Astro framework with static generation and partial hydration patterns
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Babysit a GitHub pull request after creation by continuously polling review comments, CI checks/workflow runs, and mergeability state until the PR is merged/closed or user help is required. Diagnose failures, retry likely flaky failures up to 3 times, auto-fix/push branch-related issues when appropriate, and keep watching open PRs so fresh review feedback is surfaced promptly. Use when the user asks Codex to monitor a PR, watch CI, handle review comments, or keep an eye on failures and feedback on an open PR.
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Adopt better-result in an existing TypeScript codebase. Use when replacing try/catch, Promise rejection handling, null sentinels, or thrown domain exceptions with typed Result workflows.
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