deepseek-ai/deepseek-harness · error · WebError

WEB_DUPLICATE_PROVIDER

WEB_DUPLICATE_PROVIDER

Error message

a web provider with id "${provider.id}" is already registered

What it means

Error "a web provider with id "${provider.id}" is already registered" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/web/web/src/index.ts:120

   */
  registerSearchProvider(provider: WebSearchProvider): () => void {
    return this.registerProvider(this.searchProviders, provider)
  }

  /**
   * Register a fetch provider. Throws {@link WebError} `WEB_DUPLICATE_PROVIDER`
   * if its id is already registered for fetch. Returns a disposer; disposed
   * with the calling fiber.
   * @param provider - the provider; its `id` is the registry key.
   * @returns the disposer that unregisters the provider.
   */
  registerFetchProvider(provider: WebFetchProvider): () => void {
    return this.registerProvider(this.fetchProviders, provider)
  }

  private registerProvider<P extends { readonly id: string }>(store: Map<string, P>, provider: P): () => void {
    if (store.has(provider.id)) {
      throw new WebError(`a web provider with id "${provider.id}" is already registered`, 'WEB_DUPLICATE_PROVIDER')
    }
    const dispose = this.ctx.effect(function* () {
      store.set(provider.id, provider)
      yield () => store.delete(provider.id)
    }, 'web.registerProvider()')
    // ctx.effect's disposer returns Promise<void>; our disposer API is
    // synchronous fire-and-forget — discard the (always-resolved) promise.
    return () => void dispose()
  }

  /**
   * Run one search through the selected provider. Resolves the provider at call
   * time with the selection rules above; throws {@link WebError} when the
   * capability cannot run. The seam enforces `request.maxResults` on the result:
   * if the provider over-returns, `sources[]` is truncated and `truncated` set.
   * @param request - the query and optional result limit.
   * @param signal - optional cancellation signal forwarded to the provider.
   * @returns the provider's results, capped to `request.maxResults`.

View on GitHub (pinned to b150a551b8)

Solutions

1. Pick a unique id for the provider you are registering, or remove the earlier registration of the same id from your cordis.yml composition.
2. If the replacement is intentional, unregister the existing provider first and then register the new one.

When it happens

Trigger: Thrown at packages/web/web/src/index.ts:120 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of deepseek-ai/deepseek-harness@b150a551b8 (2026-08-24). Data as JSON: /api/errors/8f781f1e5dc0766c. Report an issue: GitHub.