📄 CodeRabbit inference engine (.cursor/rules/coding-guidelines.mdc)

**/*.{ts,tsx}: Always use import type for type-only imports
Separate type imports from value imports
Avoid overzealous object destructuring; prefer direct property access
Object destructuring is acceptable when a variable is used 3+ times
Prefer array destructuring
Avoid sparse array destructuring
Never destructure in function parameter declarations
Avoid destructuring potentially nullish nested properties
Maximum 3 parameters per function; use options objects when more
Type parameter names must match /^(T|$)(A-Z)?[0-9]*$/
Prefix unused variables, parameters, and caught errors with _
Prefer namespace imports for validation libraries and large modules (e.g., import * as z from 'zod', import * as React from 'react')
Follow import order: test helpers, tRPC test imports, third-party, then relative
Never import from @trpc/*/src; import from the package root instead
Do not use Symbol.dispose or Symbol.asyncDispose; use makeResource()/makeAsyncResource()
Always use await using for resource cleanup
Prefer makeResource()/makeAsyncResource() over manual disposal logic
Avoid non-null assertions (!)
Use proper type guards and optional chaining instead of non-null assertions
Switch statements must be exhaustive for union types
Rely on TypeScript inference; avoid unnecessary explicit return/output types
Use explicit types at public API boundaries, for complex generic constraints, or when inference is insufficient/ambiguous
Use the satisfies operator to retain inference while enforcing shapes
Use as const for literal type inference when appropriate
Prefer explicit typing over any
Use type assertions sparingly
Leverage TypeScript strict mode features

Files:

• packages/server/src/unstable-core-do-not-import/router.ts

📄 CodeRabbit inference engine (.cursor/rules/coding-guidelines.mdc)

Use camelCase for file names (with exceptions like TRPC/RPC/HTTP/JSON acronyms, .config.js, .d.ts, and tests)

Files:

• packages/server/src/unstable-core-do-not-import/router.ts

📄 CodeRabbit inference engine (.cursor/rules/coding-guidelines.mdc)

No console.log in packages; use proper logging instead

Files:

• packages/server/src/unstable-core-do-not-import/router.ts

Learnt from: CR
Repo: trpc/trpc PR: 0
File: .cursor/rules/test-patterns.mdc:0-0
Timestamp: 2025-09-05T15:16:48.745Z
Learning: Applies to **/*.test.ts : NEVER use the deprecated `routerToServerAndClientNew()` in tests

Applied to files:

• packages/server/src/unstable-core-do-not-import/router.ts