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typescript-best-practices from cursor/plugins is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
TypeScript best practices. Use when reading or editing any .ts or .tsx file.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# TypeScript best practices
Apply the **type-system-discipline** principle skill first.
| Rule | Summary |
|------|---------|
| Discriminated unions | Model variants with a `kind` literal discriminant so impossible states can't be represented. No optional-field bags. |
| Branded types | Brand primitives with `& { readonly __brand: "X" }` so they can't be mixed up. Validate once at the boundary. A brand comes from a verifying type guard (`input is AgentId`), never from `as`. |
| 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. |
| Simplest total type | Keep `T[]` while every operation on it stays total. Strengthen to `NonEmpty<T>` only where the loose type forces `!`, a cast, or a "should never happen" throw. |
| `unknown` over `any` | External data is `unknown`. |
| 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`. |
…
The line at the top of this page pins the label git:20261017.0317eb8, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
GET https://markdownregistry.com/api/v1/artifacts/art_zysjwhgcb6ij5tu6
GET https://markdownregistry.com/api/v1/resolve?ref=cursor/plugins/typescript-best-practices
GET https://markdownregistry.com/api/v1/blob/ec1dac086d3708e5940d45d250c30a37dd953b4e3cb2ca0692f5851d7a039e27
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
cursor/plugins · advisor/skills/advisor/SKILL.md · Advisor mode. Consult a stronger (or different) model at key checkpoints: before major decisions, when stuck on an…
cursor/plugins · agent-compatibility/skills/check-agent-compatibility/SKILL.md · Run the full repository compatibility pass: scanner score, startup path, validation loop, and docs reliability.
cursor/plugins · cli-for-agent/skills/cli-for-agents/SKILL.md · Designs or reviews CLIs so coding agents can run them reliably: non-interactive flags, layered --help with examples…
cursor/plugins · create-plugin/skills/create-plugin-scaffold/SKILL.md · Create a new Cursor plugin scaffold with a valid manifest, component directories, and marketplace wiring. Use when…
cursor/plugins · create-plugin/skills/review-plugin-submission/SKILL.md · Audit a Cursor plugin for marketplace readiness. Use when validating manifests, component metadata, discovery paths…
cursor/plugins · cursor-sdk/skills/cursor-sdk/SKILL.md · Guide users building apps, scripts, CI pipelines, or automations on top of the Cursor TypeScript SDK (`@cursor/sdk`)…
cursor/plugins · cursor-team-kit/skills/control-cli/SKILL.md · Build or adapt a local harness to drive, inspect, and profile an interactive CLI or TUI without external services. Use…
cursor/plugins · cursor-team-kit/skills/control-ui/SKILL.md · Build or adapt a local browser/CDP harness to drive and inspect a web, IDE, or Electron UI. Use for local UI…
michael-denyer/pstack-claude · plugins/pstack/skills/typescript-best-practices/SKILL.md · TypeScript best practices. Use when reading or editing any .ts or .tsx file.
hoangnguyen0403/agent-skills-standard · .claude/skills/typescript/typescript-best-practices/SKILL.md · Write idiomatic TypeScript patterns for clean, maintainable code. Use when writing or refactoring TypeScript classes…
hoangnguyen0403/agent-skills-standard · .agents/skills/typescript/typescript-best-practices/SKILL.md · Write idiomatic TypeScript patterns for clean, maintainable code. Use when writing or refactoring TypeScript classes…
aiskillstore/marketplace · skills/0xbigboss/typescript-best-practices/SKILL.md · Use when reading or writing TypeScript or JavaScript files (.ts, .tsx, .js, tsconfig.json).
j-star-films-studios/vibecode-protocol-suite · assets/.agent/skills/web-dev-standards/typescript-standards/SKILL.md · TypeScript best practices. Use when reading or editing any .ts or .tsx file.
