[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"skill:01M71MT37W015EGE0EB82JQYAM":3,"skill-same:01M71MT37W015EGE0EB82JQYAM":65},{"skillNo":4,"name":5,"nameZh":6,"description":7,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":12,"repositoryNo":13,"starsCount":14,"licenseSpdxId":15,"licenseFileUrl":6,"sourceHtmlUrl":16,"categories":17,"keywords":18,"publishedAt":29,"linkOnly":30,"markdownContent":31,"markdownBody":32,"frontMatter":33,"refName":38,"commitSha":39,"skillDirectory":40,"forksCount":14,"repositoryHtmlUrl":41,"repositoryHomepageUrl":6,"ownerHtmlUrl":42,"ownerBlogUrl":43,"ownerDescription":44,"updatedAt":45,"install":46,"resources":58},"01M71MT37W015EGE0EB82JQYAM","typescript-best-practices",null,"TypeScript best practices. Use when reading or editing any .ts or .tsx file.","bbishdotdev\u002Fai-tools","bbishdotdev","https:\u002F\u002Favatars.githubusercontent.com\u002Fu\u002F5323528?v=4","01M71MHYW2Q0DVZA22Q79M8KER","Brenden Bishop","01M71MHYWSMQWFPGA8CBJYQANH",0,"MIT","https:\u002F\u002Fgithub.com\u002Fbbishdotdev\u002Fai-tools\u002Fblob\u002Fmain\u002Fbstack\u002Fupstream\u002Fpstack\u002Fskills\u002Ftypescript-best-practices\u002FSKILL.md",[],[19,20,21,22,23,24,25,26,27,28],"typescript best practices","best practices","typescript","reading","true","tsx","use","when","editing","file","2026-11-10 10:56:23",false,"---\nname: typescript-best-practices\ndescription: TypeScript best practices. Use when reading or editing any .ts or .tsx file.\npaths: [\"**\u002F*.ts\", \"**\u002F*.tsx\"]\ndisable-model-invocation: true\n---\n\n# TypeScript best practices\n\nApply the **type-system-discipline** principle skill first.\n\n| Rule | Summary |\n|------|---------|\n| Discriminated unions | Model variants with a `kind` literal discriminant so impossible states can't be represented. No optional-field bags. |\n| Branded types | Brand primitives with `& { readonly __brand: \"X\" }` so they can't be mixed up. Validate once at the boundary. |\n| Constructive modeling | Build the shape so the illegal value can't be constructed. `[T, ...T[]]` for non-empty, `[T, T][]` for even length, `start` plus `duration` for a range. Not a runtime guard, not a wish for refinement types. |\n| Simplest total type | Keep `T[]` while every operation on it stays total. Strengthen to `NonEmpty\u003CT>` only where the loose type forces `!`, a cast, or a \"should never happen\" throw. |\n| `unknown` over `any` | External data is `unknown`. |\n| Schemas before guards | Before hand-writing a property-by-property type guard, use the repository's runtime schema library and infer the type from the schema, such as `z.infer`. |\n| No `as` casts | Every `as` is a runtime crash waiting. Cast only after validation. |\n| Narrowing hierarchy | Discriminant switch > `in` operator > `typeof`\u002F`instanceof` > user-defined type guard > `as`. |\n| Type guards | Must verify the claim. A lying guard is worse than `as` because the bug hides behind a name that says it's safe. Name them `isX` or `hasX`. |\n| Exhaustiveness | Inline `const _exhaustive: never = x;` in default arms so the compiler errors when a new variant is added. |\n| `satisfies` over `as` | Validates the value without widening literal types. |\n| Boundary validation | Parse where data crosses in, into a named domain type. `Record\u003Cstring, unknown>` (however spelled) stops at that parse. Trust types inside. See the **boundary-discipline** principle skill. |\n| Schema-derived types | Reach for `Pick`\u002F`Omit`\u002F`Parameters`\u002F`ReturnType`\u002F`Awaited`\u002F`typeof` before declaring a new interface. |\n| Object args | Pass objects, not positional, so argument order is self-documenting. Skip on hot paths (per-frame render, tokenizers, parsers). |\n| Real tests | Don't mock what you can run. Prefer the framework's real test primitives with leak\u002Fdisposable checks, and verify UI in a running build. Mock only what you can't run locally. |\n| Structured telemetry | Prefer structured logger diagnostics with enough context to debug from an id. No `console.log` in shipped code. |\n\nExamples: `references\u002Fpatterns.md`.\n","# TypeScript best practices\n\nApply the **type-system-discipline** principle skill first.\n\n| Rule | Summary |\n|------|---------|\n| Discriminated unions | Model variants with a `kind` literal discriminant so impossible states can't be represented. No optional-field bags. |\n| Branded types | Brand primitives with `& { readonly __brand: \"X\" }` so they can't be mixed up. Validate once at the boundary. |\n| Constructive modeling | Build the shape so the illegal value can't be constructed. `[T, ...T[]]` for non-empty, `[T, T][]` for even length, `start` plus `duration` for a range. Not a runtime guard, not a wish for refinement types. |\n| Simplest total type | Keep `T[]` while every operation on it stays total. Strengthen to `NonEmpty\u003CT>` only where the loose type forces `!`, a cast, or a \"should never happen\" throw. |\n| `unknown` over `any` | External data is `unknown`. |\n| Schemas before guards | Before hand-writing a property-by-property type guard, use the repository's runtime schema library and infer the type from the schema, such as `z.infer`. |\n| No `as` casts | Every `as` is a runtime crash waiting. Cast only after validation. |\n| Narrowing hierarchy | Discriminant switch > `in` operator > `typeof`\u002F`instanceof` > user-defined type guard > `as`. |\n| Type guards | Must verify the claim. A lying guard is worse than `as` because the bug hides behind a name that says it's safe. Name them `isX` or `hasX`. |\n| Exhaustiveness | Inline `const _exhaustive: never = x;` in default arms so the compiler errors when a new variant is added. |\n| `satisfies` over `as` | Validates the value without widening literal types. |\n| Boundary validation | Parse where data crosses in, into a named domain type. `Record\u003Cstring, unknown>` (however spelled) stops at that parse. Trust types inside. See the **boundary-discipline** principle skill. |\n| Schema-derived types | Reach for `Pick`\u002F`Omit`\u002F`Parameters`\u002F`ReturnType`\u002F`Awaited`\u002F`typeof` before declaring a new interface. |\n| Object args | Pass objects, not positional, so argument order is self-documenting. Skip on hot paths (per-frame render, tokenizers, parsers). |\n| Real tests | Don't mock what you can run. Prefer the framework's real test primitives with leak\u002Fdisposable checks, and verify UI in a running build. Mock only what you can't run locally. |\n| Structured telemetry | Prefer structured logger diagnostics with enough context to debug from an id. No `console.log` in shipped code. |\n\nExamples: `references\u002Fpatterns.md`.\n",{"name":5,"paths":34,"description":7,"disable-model-invocation":37},[35,36],"**\u002F*.ts","**\u002F*.tsx",true,"main","e7c8126d1ad4df934236dba12521dcbe7fcd9d74","bstack\u002Fupstream\u002Fpstack\u002Fskills\u002Ftypescript-best-practices","https:\u002F\u002Fgithub.com\u002Fbbishdotdev\u002Fai-tools","https:\u002F\u002Fgithub.com\u002Fbbishdotdev","bbish.dev","Husband | Father | Technologist\r\nEngineering leader helping product and delivery teams use AI to build better systems, habits, and tools.","2026-11-11 11:13:39",{"source":8,"skillName":5,"commands":47,"prompt":57,"zipAvailable":37},[48,51,54],{"tool":49,"command":50},"npx","npx skills add bbishdotdev\u002Fai-tools --skill typescript-best-practices",{"tool":52,"command":53},"bunx","bunx skills add bbishdotdev\u002Fai-tools --skill typescript-best-practices",{"tool":55,"command":56},"pnpm","pnpm dlx skills add bbishdotdev\u002Fai-tools --skill typescript-best-practices","安装技能，技能地址：https:\u002F\u002Fgithub.com\u002Fbbishdotdev\u002Fai-tools\u002Fblob\u002Fmain\u002Fbstack\u002Fupstream\u002Fpstack\u002Fskills\u002Ftypescript-best-practices\u002FSKILL.md",[59],{"path":60,"resourceType":61,"resourceTypeDesc":62,"sizeBytes":63,"sourceHtmlUrl":64},"references\u002Fpatterns.md","REFERENCE","参考文档",8860,"https:\u002F\u002Fgithub.com\u002Fbbishdotdev\u002Fai-tools\u002Fblob\u002Fmain\u002Fbstack\u002Fupstream\u002Fpstack\u002Fskills\u002Ftypescript-best-practices\u002Freferences\u002Fpatterns.md",[66,97,108,141,164,182],{"skillNo":67,"name":68,"nameZh":6,"description":69,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":12,"repositoryNo":13,"starsCount":14,"licenseSpdxId":15,"licenseFileUrl":6,"sourceHtmlUrl":70,"categories":71,"keywords":77,"publishedAt":29},"01M71MT5NBY3RY660EA06K9CA1","why","Use for 'why does X work this way', 'why we picked Y', design rationale, regressions, postmortems, or data-backed thresholds. Discovers available MCPs and queries each evidence category (source control, issue tracker, long-form docs, real-time chat, infrastructure observability, error tracking, product analytics warehouse) in parallel, then returns a cited read on decisions and tradeoffs. Use how for runtime behavior.","https:\u002F\u002Fgithub.com\u002Fbbishdotdev\u002Fai-tools\u002Fblob\u002Fmain\u002Fbstack\u002Fupstream\u002Fpstack\u002Fskills\u002Fwhy\u002FSKILL.md",[72],{"categoryNo":73,"categoryName":74,"taxonomyType":75,"taxonomyTypeDesc":76},"01JBSEEDCAT000000000000033","数据分析师","PROFESSION","适用职业",[68,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96],"how","parallel","observability","warehouse","returns","infrastructure","source","analytics","data","issue","read","tracker","product","work","design","product analytics","time","error tracking","error",{"skillNo":98,"name":99,"nameZh":6,"description":100,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":12,"repositoryNo":13,"starsCount":14,"licenseSpdxId":15,"licenseFileUrl":6,"sourceHtmlUrl":101,"categories":102,"keywords":103,"publishedAt":29},"01M71MT4CFF7AK4TRV40P7ZZ30","unslop","Cut AI tells from any writing. Must always apply.","https:\u002F\u002Fgithub.com\u002Fbbishdotdev\u002Fai-tools\u002Fblob\u002Fmain\u002Fbstack\u002Fupstream\u002Fpstack\u002Fskills\u002Funslop\u002FSKILL.md",[],[99,104,105,106,107,23],"ai tells","cut","apply","writing",{"skillNo":109,"name":110,"nameZh":6,"description":111,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":12,"repositoryNo":13,"starsCount":14,"licenseSpdxId":15,"licenseFileUrl":6,"sourceHtmlUrl":112,"categories":113,"keywords":125,"publishedAt":29},"01M71MT1092N34HQMGECW170JP","technical-writing","Layered technical-writing standard: Diátaxis structure, Google developer style sentences, STE instruction rules, Global English syntax. Use for \u002Ftechnical-writing or when writing or reviewing docs, RFCs, readmes, PR descriptions, or commit messages.","https:\u002F\u002Fgithub.com\u002Fbbishdotdev\u002Fai-tools\u002Fblob\u002Fmain\u002Fbstack\u002Fupstream\u002Fpstack\u002Fskills\u002Ftechnical-writing\u002FSKILL.md",[114,119,122],{"categoryNo":115,"categoryName":116,"taxonomyType":117,"taxonomyTypeDesc":118},"01JBSEEDCAT000000000000018","写作与文案","SCENARIO","使用场景",{"categoryNo":120,"categoryName":121,"taxonomyType":75,"taxonomyTypeDesc":76},"01JBSEEDCAT000000000000030","开发工程师",{"categoryNo":123,"categoryName":124,"taxonomyType":75,"taxonomyTypeDesc":76},"01JBSEEDCAT000000000000036","内容创作者",[107,126,127,128,129,130,131,132,133,134,135,136,137,26,138,25,23,139,110,140],"technical","technical writing","standard","commit messages","google","syntax","style","structure","layered","english","pr","commit","Rules","messages","for",{"skillNo":142,"name":143,"nameZh":6,"description":144,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":12,"repositoryNo":13,"starsCount":14,"licenseSpdxId":15,"licenseFileUrl":6,"sourceHtmlUrl":145,"categories":146,"keywords":150,"publishedAt":29},"01M71MSYRMT7KZPQFY7A2ZHGMB","teach","Explain a body of work plainly so a person actually understands it. Runs the `how` and `why` skills and weaves what they find into one clear explanation. Use for 'teach me this', 'help me really understand X', 'explain this change or subsystem to me'.","https:\u002F\u002Fgithub.com\u002Fbbishdotdev\u002Fai-tools\u002Fblob\u002Fmain\u002Fbstack\u002Fupstream\u002Fpstack\u002Fskills\u002Fteach\u002FSKILL.md",[147],{"categoryNo":148,"categoryName":149,"taxonomyType":75,"taxonomyTypeDesc":76},"01JBSEEDCAT000000000000039","教师与教育",[143,151,152,153,154,25,155,156,23,157,158,68,159,160,140,78,161,162,163,91],"it","help","one","body","teach me","understand","clear","person","find","explain","me","explanation","change",{"skillNo":165,"name":166,"nameZh":6,"description":167,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":12,"repositoryNo":13,"starsCount":14,"licenseSpdxId":15,"licenseFileUrl":6,"sourceHtmlUrl":168,"categories":169,"keywords":170,"publishedAt":29},"01M71MSWTVAEVMZAG7SMWFE1FE","tdd","Use only when the user explicitly asks for TDD, a failing test, or a regression test, OR when the bug has an obvious cheap local test target. Skip when the test path is unclear, expensive, integration-heavy, or not requested.","https:\u002F\u002Fgithub.com\u002Fbbishdotdev\u002Fai-tools\u002Fblob\u002Fmain\u002Fbstack\u002Fupstream\u002Fpstack\u002Fskills\u002Ftdd\u002FSKILL.md",[],[166,171,23,172,173,174,175,176,140,177,178,25,179,180,181,26],"only","local","failing","bug","integration","regression","target","test","path","user","regression test",{"skillNo":183,"name":184,"nameZh":6,"description":185,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":12,"repositoryNo":13,"starsCount":14,"licenseSpdxId":15,"licenseFileUrl":6,"sourceHtmlUrl":186,"categories":187,"keywords":188,"publishedAt":29},"01M71MSVGH8V70VHAJH5RF4V4G","swarm","Fan out N parallel workers, drain them, and return one report. Use for \u002Fswarm, 'swarm this', or parallel coverage, races, gauntlets, and exploration.","https:\u002F\u002Fgithub.com\u002Fbbishdotdev\u002Fai-tools\u002Fblob\u002Fmain\u002Fbstack\u002Fupstream\u002Fpstack\u002Fskills\u002Fswarm\u002FSKILL.md",[],[184,153,189,190,25,23,191,140,192,79,193,194],"fan out","workers","report","exploration","drain","coverage"]