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(triggers: **\u002F*.service.ts, **\u002F*.handler.ts, **\u002F*.controller.ts, **\u002F*.go, **\u002F*.java, **\u002F*.kt, **\u002F*.py, error handling, exception, try catch, error boundary, error response, error code, throw)","ComeOnOliver\u002Fskillshub","ComeOnOliver","https:\u002F\u002Favatars.githubusercontent.com\u002Fu\u002F43215937?v=4","01M6E5JNFECJAAVFE0W7SMWWD2","Haoran Shu","01M6E5JNNDQS7AJZDYFQ8TPZCK",67,"MIT","https:\u002F\u002Fgithub.com\u002FComeOnOliver\u002Fskillshub\u002Fblob\u002Fmain\u002Fskills\u002FHoangNguyen0403\u002Fagent-skills-standard\u002Fcommon-error-handling\u002FSKILL.md",[],[19,20,21,22,23,24,25,26,27,28,29,30,31,32],"error handling","common","error","common error handling","design","go","code","java","controller","boundary","standards","service","triggers","codes","2026-11-10 10:12:30",false,"---\nname: common-error-handling\ndescription: \"Cross-cutting standards for error design, response shapes, error codes, and boundary placement. (triggers: **\u002F*.service.ts, **\u002F*.handler.ts, **\u002F*.controller.ts, **\u002F*.go, **\u002F*.java, **\u002F*.kt, **\u002F*.py, error handling, exception, try catch, error boundary, error response, error code, throw)\"\n---\n\n# Error Handling Standards\n\n## **Priority: P1 (OPERATIONAL)**\n\n## ? Error Architecture\n\n- **API Layer**: Map domain errors to HTTP responses globally.\n- **Domain Layer**: Throw pure business errors. NO HTTP status codes here.\n- **Infra Layer**: Wrap 3rd-party exceptions. Do NOT leak raw DB errors to API.\n- **Standard Shape**: APIs must return a standardized JSON envelope (`code`, `message`, `traceId`).\n\n## ? Error Mechanics\n\n- **Wrap**: Add context (`fmt.Errorf(\"process: %w\", err)`, `new Error('msg', { cause })`).\n- **Replace**: Only when original error leaks sensitive details.\n- **Error Codes**: Use `SCREAMING_SNAKE_CASE` IDs (`ORDER_PAYMENT_FAILED`).\n\n## ? Anti-Patterns\n\n- **Swallowing Errors**: Never `catch(e) {}` without logging or re-throwing.\n- **Stack Traces**: Never expose stack traces in API responses.\n- **Generic 500s**: Use `400` with specific details for validation instead of 500.\n\n## References\n- [API Error Contract](references\u002Fapi-error-contract.md)\n\n","# Error Handling Standards\n\n## **Priority: P1 (OPERATIONAL)**\n\n## ? Error Architecture\n\n- **API Layer**: Map domain errors to HTTP responses globally.\n- **Domain Layer**: Throw pure business errors. NO HTTP status codes here.\n- **Infra Layer**: Wrap 3rd-party exceptions. Do NOT leak raw DB errors to API.\n- **Standard Shape**: APIs must return a standardized JSON envelope (`code`, `message`, `traceId`).\n\n## ? Error Mechanics\n\n- **Wrap**: Add context (`fmt.Errorf(\"process: %w\", err)`, `new Error('msg', { cause })`).\n- **Replace**: Only when original error leaks sensitive details.\n- **Error Codes**: Use `SCREAMING_SNAKE_CASE` IDs (`ORDER_PAYMENT_FAILED`).\n\n## ? Anti-Patterns\n\n- **Swallowing Errors**: Never `catch(e) {}` without logging or re-throwing.\n- **Stack Traces**: Never expose stack traces in API responses.\n- **Generic 500s**: Use `400` with specific details for validation instead of 500.\n\n## References\n- [API Error Contract](references\u002Fapi-error-contract.md)\n\n",{"name":5,"description":7},"main","def8531e65114c0fca8fb8551c1871ee0eed705c","skills\u002FHoangNguyen0403\u002Fagent-skills-standard\u002Fcommon-error-handling",24,"https:\u002F\u002Fgithub.com\u002FComeOnOliver\u002Fskillshub","https:\u002F\u002Fskillshub.wtf","https:\u002F\u002Fgithub.com\u002FComeOnOliver","AI & Blockchain Engineer\r\n","2026-06-24 22:07:19",{"source":8,"skillName":5,"commands":48,"prompt":58,"zipAvailable":59},[49,52,55],{"tool":50,"command":51},"npx","npx skills add ComeOnOliver\u002Fskillshub --skill common-error-handling",{"tool":53,"command":54},"bunx","bunx skills add ComeOnOliver\u002Fskillshub --skill 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