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Debug async/await errors, unhandled promise rejections, and event loop blocking. Do not use for synchronous logic bugs or race conditions in concurrent systems.
Codex または Claude でインストール この Prompt をコピーして Codex、Claude、または他のアシスタントに貼り付けると、Skill ページを確認してインストールできます。
SOC 職業分類に基づく
Use to implement a REST or GraphQL API endpoint from a specification or description, including request validation, error handling, and accompanying tests. Activate for building a new API route, resolver, or handler end-to-end. Do NOT use for API design/contract creation, documentation generation, or frontend API consumption.
Use to implement background job processing with a queue, worker, retry with exponential backoff, dead letter queue, and monitoring. Activate when the request involves offloading work from the request cycle (emails, reports, data processing). Do NOT use for real-time event streaming, webhook handling, or scheduled cron jobs.
Use to scaffold a new project from scratch — generating directory structure, configuration files, entry points, and a README skeleton. Activate when starting a new project, service, or package and needing a production-ready starting point. Do NOT use for adding features to existing projects, generating tests, or CI/CD configuration.
Use to design and implement a caching layer for data that is expensive to compute or fetch. Activate for cache-aside, write-through, or write-behind patterns, TTL strategy, and cache invalidation logic. Do NOT use for database query optimization, CDN configuration, or HTTP response caching headers.
Use to generate a CI/CD pipeline configuration for building, testing, and deploying an application. Activate for GitHub Actions, GitLab CI, CircleCI, or similar pipeline tools for any tech stack. Do NOT use for infrastructure provisioning, Dockerfile creation, or deployment strategy design.
Use to generate production-ready code for a new feature, function, class, or module from a description. Activate for writing new code from scratch with error handling, inline documentation, and a self-review checklist. Do NOT use for refactoring existing code, code review, or test generation.
| name | async-await-error-tracing |
| description | Debug async/await errors, unhandled promise rejections, and event loop blocking. Do not use for synchronous logic bugs or race conditions in concurrent systems. |
| version | 1.1.0 |
| time_saved | Manual: 1–2 hours | With skill: 10–20 minutes |
| license | Proprietary — Personal Use Only |
| category | debugging |
| complexity | Intermediate |
| tokens | ~3500 |
| tags | ["async","await","promise","unhandled-rejection","event-loop","debugging"] |
| author | vheins |
Trace and fix async errors including unhandled rejections, missing awaits, and event loop blocking.
| Variable | Type | Req | Description |
|---|---|---|---|
tech_stack | string | Yes | e.g., "Node.js + Express" |
error_message | string | Yes | e.g., "UnhandledPromiseRejection" |
code | string | Yes | Async logic section |
context | string | Yes | Op flow and error expectations |
try/catch.--async-stack-traces).expect(...).rejects.toThrow()).| Case | Strategy |
|---|---|
Async in forEach | Recommend Promise.all(array.map(...)) for sequential/parallel handling. |
| Event Loop Block | Recommend worker threads or setImmediate for heavy computation. |
| Intermittent Race | Add diagnostic logs around promise settlement points. |
flowchart TD
A[Parse inputs] --> B{Code available?}
B -- No --> C[Describe async execution model]
C --> D[Provide diagnostic template + tracing tools]
B -- Yes --> E[Classify Async Error Type]
E --> F[Trace Error Flow]
F --> G[Apply Fix: try/catch + propagation + logging]
G --> H[Improve async stack trace config]
H --> I[Write test verifying error propagation]
D --> J[Output: Diagnostic Path]
I --> K[Output: 5-Section Report + Test Snippet]
@upstash/context7-mcp: Library documentation and examples.@modelcontextprotocol/server-sequential-thinking: Complex reasoning.| Version | Date | Description |
|---|---|---|
| 1.1.0 | 2026-03-20 | Restructured: examples/references separated, added fields |
| 1.0.0 | 2026-03-20 | Initial release |