anyUnknownInErrorContext

Detects 'any' or 'unknown' types in Effect error or requirements channels

Property	Value
Category	Correctness
Default severity	off
Fixable	No
Effect versions	v3, v4
Diagnostic codes	TS377030
Language Service name	anyUnknownInErrorContext
Oxlint name	effecttsgo/any-unknown-in-error-context

Preview

import { Effect } from "effect"

export const preview = Effect.gen(function*() {
/**
             ^^^^^^^ effecttsgo(any-unknown-in-error-context): This has unknown in the requirements channel and any in the error channel which is not recommended. Only service identifiers should appear in the requirements channel. Having an unknown or any error type is not useful. Consider instead using specific error types baked by Data.TaggedError for example.
*/
  yield* Effect.context<unknown>()
/**
         ^^^^^^^^^^^^^^^^^^^^^^^^^ effecttsgo(any-unknown-in-error-context): This has unknown in the requirements channel which is not recommended. Only service identifiers should appear in the requirements channel.
*/
  return yield* Effect.fail<any>("boom")
/**
                ^^^^^^^^^^^^^^^^^^^^^^^^ effecttsgo(any-unknown-in-error-context): This has any in the error channel which is not recommended. Having an unknown or any error type is not useful. Consider instead using specific error types baked by Data.TaggedError for example.
*/
})

Language Service Configuration

See the Language Service setup guide for installation instructions.

{
  "$schema": "./node_modules/@effect/tsgo/schema.json",
  "compilerOptions": {
    "plugins": [
      {
        "name": "@effect/language-service",
        "diagnosticSeverity": {
          "anyUnknownInErrorContext": "warning"
        }
      }
    ]
  }
}

Oxlint Configuration

See the Oxlint setup guide for installation and patching instructions.

{
  "$schema": "./node_modules/@effect/tsgo/oxlint-schema.json",
  "options": {
    "typeAware": true
  },
  "plugins": ["effecttsgo"],
  "rules": {
    "effecttsgo/any-unknown-in-error-context": "warn"
  }
}