output.txt

AiError: AnthropicLanguageModel.generateText: An error occurred
    at cause (/Users/mattiamanzati/Desktop/timmeee/node_modules/.pnpm/@[email protected]_@[email protected]_@[email protected]_@effect+platf_ec8b015952fd411ff0df445882568c36/node_modules/@effect/ai-anthropic/src/AnthropicLanguageModel.ts:187:37)
    at cause (/Users/mattiamanzati/Desktop/timmeee/node_modules/.pnpm/[email protected]/node_modules/effect/src/internal/core.ts:910:24)
    at <anonymous> (/Users/mattiamanzati/Desktop/timmeee/node_modules/.pnpm/[email protected]/node_modules/effect/src/internal/fiberRuntime.ts:1186:44)
    at body (/Users/mattiamanzati/Desktop/timmeee/node_modules/.pnpm/[email protected]/node_modules/effect/src/Utils.ts:786:14)
    at FiberRuntime.Failure (/Users/mattiamanzati/Desktop/timmeee/node_modules/.pnpm/[email protected]/node_modules/effect/src/internal/fiberRuntime.ts:1186:20)
    at <anonymous> (/Users/mattiamanzati/Desktop/timmeee/node_modules/.pnpm/[email protected]/node_modules/effect/src/internal/fiberRuntime.ts:1380:53)
    at f (/Users/mattiamanzati/Desktop/timmeee/node_modules/.pnpm/[email protected]/node_modules/effect/src/internal/tracer.ts:101:19)
    at runLoop (/Users/mattiamanzati/Desktop/timmeee/node_modules/.pnpm/[email protected]/node_modules/effect/src/internal/fiberRuntime.ts:1370:34)
    at evaluateEffect (/Users/mattiamanzati/Desktop/timmeee/node_modules/.pnpm/[email protected]/node_modules/effect/src/internal/fiberRuntime.ts:936:27)
    at evaluateMessageWhileSuspended (/Users/mattiamanzati/Desktop/timmeee/node_modules/.pnpm/[email protected]/node_modules/effect/src/internal/fiberRuntime.ts:904:14)
    at AiLanguageModel.generateText {
  name: '(FiberFailure) AiError',
  [Symbol(effect/Runtime/FiberFailure)]: Symbol(effect/Runtime/FiberFailure),
  [Symbol(effect/Runtime/FiberFailure/Cause)]: {
    _tag: 'Fail',
    error: AiError: AnthropicLanguageModel.generateText: An error occurred
        at cause (/Users/mattiamanzati/Desktop/timmeee/node_modules/.pnpm/@[email protected]_@[email protected]_@[email protected]_@effect+platf_ec8b015952fd411ff0df445882568c36/node_modules/@effect/ai-anthropic/src/AnthropicLanguageModel.ts:187:37)
        at cause (/Users/mattiamanzati/Desktop/timmeee/node_modules/.pnpm/[email protected]/node_modules/effect/src/internal/core.ts:910:24)
        at <anonymous> (/Users/mattiamanzati/Desktop/timmeee/node_modules/.pnpm/[email protected]/node_modules/effect/src/internal/fiberRuntime.ts:1186:44)
        at body (/Users/mattiamanzati/Desktop/timmeee/node_modules/.pnpm/[email protected]/node_modules/effect/src/Utils.ts:786:14)
        at FiberRuntime.Failure (/Users/mattiamanzati/Desktop/timmeee/node_modules/.pnpm/[email protected]/node_modules/effect/src/internal/fiberRuntime.ts:1186:20)
        at <anonymous> (/Users/mattiamanzati/Desktop/timmeee/node_modules/.pnpm/[email protected]/node_modules/effect/src/internal/fiberRuntime.ts:1380:53)
        at f (/Users/mattiamanzati/Desktop/timmeee/node_modules/.pnpm/[email protected]/node_modules/effect/src/internal/tracer.ts:101:19)
        at runLoop (/Users/mattiamanzati/Desktop/timmeee/node_modules/.pnpm/[email protected]/node_modules/effect/src/internal/fiberRuntime.ts:1370:34)
        at evaluateEffect (/Users/mattiamanzati/Desktop/timmeee/node_modules/.pnpm/[email protected]/node_modules/effect/src/internal/fiberRuntime.ts:936:27)
        at evaluateMessageWhileSuspended (/Users/mattiamanzati/Desktop/timmeee/node_modules/.pnpm/[email protected]/node_modules/effect/src/internal/fiberRuntime.ts:904:14) {
      module: 'AnthropicLanguageModel',
      method: 'generateText',
      description: 'An error occurred',
      _tag: 'AiError',
      [Symbol(@effect/ai/AiError)]: Symbol(@effect/ai/AiError),
      [cause]: ParseError: (Message (Encoded side) <-> Message)
      └─ Encoded side transformation failure
         └─ Message (Encoded side)
            └─ ["usage"]
               └─ { readonly cache_creation_input_tokens: Int & greaterThanOrEqualTo(0) | null | null; readonly cache_read_input_tokens: Int & greaterThanOrEqualTo(0) | null | null; readonly input_tokens: Int & greaterThanOrEqualTo(0); readonly output_tokens: Int & greaterThanOrEqualTo(0); readonly server_tool_use: { readonly web_search_requests: Int & greaterThanOrEqualTo(0) } | null | null; readonly service_tier: "standard" | "priority" | "batch" | null | null }
                  └─ ["server_tool_use"]
                     └─ is missing
          at issue (/Users/mattiamanzati/Desktop/timmeee/node_modules/.pnpm/[email protected]/node_modules/effect/src/ParseResult.ts:266:62)
          at <anonymous> (/Users/mattiamanzati/Desktop/timmeee/node_modules/.pnpm/[email protected]/node_modules/effect/src/Either.ts:439:25)
          at Module.<anonymous> (/Users/mattiamanzati/Desktop/timmeee/node_modules/.pnpm/[email protected]/node_modules/effect/src/Function.ts:245:18)
          at <anonymous> (/Users/mattiamanzati/Desktop/timmeee/node_modules/.pnpm/[email protected]/node_modules/effect/src/ParseResult.ts:374:12)
          at Module.<anonymous> (/Users/mattiamanzati/Desktop/timmeee/node_modules/.pnpm/[email protected]/node_modules/effect/src/Function.ts:245:18)
          at EffectPrimitive.effect_instruction_i1 (/Users/mattiamanzati/Desktop/timmeee/node_modules/.pnpm/[email protected]/node_modules/effect/src/Schema.ts:565:17)
          at <anonymous> (/Users/mattiamanzati/Desktop/timmeee/node_modules/.pnpm/[email protected]/node_modules/effect/src/internal/fiberRuntime.ts:152:36)
          at body (/Users/mattiamanzati/Desktop/timmeee/node_modules/.pnpm/[email protected]/node_modules/effect/src/Utils.ts:786:14)
          at Object.OnSuccess (/Users/mattiamanzati/Desktop/timmeee/node_modules/.pnpm/[email protected]/node_modules/effect/src/internal/fiberRuntime.ts:152:12)
          at FiberRuntime.Success (/Users/mattiamanzati/Desktop/timmeee/node_modules/.pnpm/[email protected]/node_modules/effect/src/internal/fiberRuntime.ts:1171:37) {
        issue: Transformation {
          ast: Transformation {
            from: [TypeLiteral],
            to: [Declaration],
            transformation: [FinalTransformation],
            annotations: [Object],
            _tag: 'Transformation'
          },
          actual: {
            id: 'msg_01XzLyzpxfY7nWZLkWuPBX2E',
            type: 'message',
            role: 'assistant',
            model: 'claude-sonnet-4-20250514',
            content: [Array],
            stop_reason: 'tool_use',
            stop_sequence: null,
            usage: [Object]
          },
          kind: 'Encoded',
          issue: Composite {
            ast: [TypeLiteral],
            actual: [Object],
            issues: [Pointer],
            output: [Object],
            _tag: 'Composite'
          },
          _tag: 'Transformation'
        },
        _tag: 'ParseError',
        [Symbol(effect/Schema/ParseErrorTypeId)]: Symbol(effect/Schema/ParseErrorTypeId)
      }
    }
  }
}

script.ts

import { AiLanguageModel, AiTool, AiToolkit } from "@effect/ai"
import { AnthropicClient, AnthropicLanguageModel } from "@effect/ai-anthropic"
import { HttpClient, HttpClientRequest, HttpClientResponse } from "@effect/platform"
import { NodeHttpClient } from "@effect/platform-node"
import { Array, Console, Effect, Layer, Redacted, Schema } from "effect"

class DadJoke extends Schema.Class<DadJoke>("DadJoke")({
  id: Schema.String,
  joke: Schema.String
}) {}

class SearchResponse extends Schema.Class<SearchResponse>("SearchResponse")({
  results: Schema.Array(DadJoke)
}) {}

class ICanHazDadJoke extends Effect.Service<ICanHazDadJoke>()("ICanHazDadJoke", {
  dependencies: [NodeHttpClient.layerUndici],
  effect: Effect.gen(function*() {
    const httpClient = yield* HttpClient.HttpClient
    const httpClientOk = httpClient.pipe(
      HttpClient.filterStatusOk,
      HttpClient.mapRequest(HttpClientRequest.prependUrl("https://icanhazdadjoke.com"))
    )

    const search = Effect.fn("ICanHazDadJoke.search")(
      function*(searchTerm: string) {
        return yield* httpClientOk.get("/search", {
          acceptJson: true,
          urlParams: { searchTerm }
        }).pipe(
          Effect.flatMap(HttpClientResponse.schemaBodyJson(SearchResponse)),
          Effect.flatMap(({ results }) => Array.head(results)),
          Effect.map((joke) => joke.joke),
          Effect.scoped,
          Effect.orDie
        )
      }
    )

    return {
      search
    } as const
  })
}) {}

class DadJokeTools extends AiToolkit.make(
  AiTool.make("GetDadJoke", {
    description: "Get a hilarious dad joke from the ICanHazDadJoke API",
    success: Schema.String,
    failure: Schema.Never,
    parameters: {
      searchTerm: Schema.String.annotations({
        description: "The search term to use to find dad jokes"
      })
    }
  })
) {}

const DadJokeToolHandlers = DadJokeTools.toLayer(
  Effect.gen(function*() {
    const icanhazdadjoke = yield* ICanHazDadJoke
    return {
      GetDadJoke: ({ searchTerm }) => icanhazdadjoke.search(searchTerm)
    }
  })
).pipe(Layer.provide(ICanHazDadJoke.Default))

const program = AiLanguageModel.generateText({
  prompt: "Generate a dad joke about pirates",
  toolkit: DadJokeTools
}).pipe(
  Effect.flatMap((response) => Console.log(response.text)),
  Effect.provide(AnthropicLanguageModel.model("claude-4-sonnet-20250514"))
)

const OpenAi = AnthropicClient.layer({
  apiKey: Redacted.make(
    "---------"
  )
}).pipe(Layer.provide(NodeHttpClient.layerUndici))

program.pipe(
  Effect.provide([OpenAi, DadJokeToolHandlers]),
  Effect.runPromise
)