missing-effect-context.md

missingEffectContext

Detects Effect values with unhandled context requirements

Property	Value
Category	Correctness
Default severity	error
Fixable	No
Effect versions	v3, v4
Diagnostic codes	TS377004
Language Service name	missingEffectContext
Oxlint name	effecttsgo/missing-effect-context

Preview

import { Effect, Context } from "effect"

class Db extends Context.Service<Db>()("Db", { make: Effect.succeed({}) }) {}

// @ts-expect-error
export const preview: Effect.Effect<void> = Db.pipe(Effect.asVoid)
/**
             ^^^^^^^ effecttsgo(missing-effect-context): This Effect requires a service that is missing from the expected Effect context: `Db`.
*/

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": {
          "missingEffectContext": "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/missing-effect-context": "warn"
  }
}