chore(deps): bump @slack/web-api from 7.16.0 to 8.0.0

[dependabot]

Bumps @slack/web-api from 7.16.0 to 8.0.0.

Release notes

Sourced from @​slack/web-api's releases.

@​slack/web-api@​8.0.0

Major Changes

• fc98c8c: Drop Node.js 18 support. The minimum supported Node.js version is now 20.

• fc98c8c: Redesigned error handling to use proper Error subclasses instead of plain objects with a code property.

  Migration: Replace if (error.code === ErrorCode.PlatformError) with if (error instanceof WebAPIPlatformError). All error classes extend a common SlackError base class (which extends Error), so you can also catch all SDK errors with if (error instanceof SlackError).

  New error class hierarchy:

  • SlackError (abstract base)
    • WebAPIPlatformError — Slack API returned ok: false
    • WebAPIRequestError — Network/transport failure (original error in cause)
    • WebAPIHTTPError — Non-200 HTTP status from Slack
    • WebAPIRateLimitedError — HTTP 429 with retryAfter seconds
    • WebAPIFileUploadInvalidArgumentsError — Invalid file upload arguments
    • WebAPIFileUploadReadFileDataError — Failed to read file data for upload

  Removed factory functions (these were internal but exported — use new with the corresponding class instead):

  • errorWithCode()
  • platformErrorFromResult() → new WebAPIPlatformError(...)
  • requestErrorWithOriginal() → new WebAPIRequestError(...)
  • httpErrorFromResponse() → new WebAPIHTTPError(...)
  • rateLimitedErrorWithDelay() → new WebAPIRateLimitedError(...)

  Other breaking type changes:

  • WebAPIHTTPError.headers type changed from IncomingHttpHeaders to Record<string, string>.
  • The CodedError interface is deprecated — use instanceof checks with specific error classes instead.
  • Error .name values changed from generic 'Error' to descriptive class names (e.g., 'WebAPIPlatformError').

• fc98c8c: Replaced axios with the standard Fetch API for all HTTP transport. The following options and types have been removed from WebClientOptions:

  • agent — Use the new fetch option to provide a custom fetch implementation with proxy or keep-alive support. For proxies, prefer the built-in http.setGlobalProxyFromEnv() or NODE_USE_ENV_PROXY=1 (Node.js 24+). For advanced use cases:

    import { fetch, Agent } from "undici";
    const client = new WebClient(token, {
      fetch: (url, init) =>
        fetch(url, {
          ...init,
          dispatcher: new Agent({ keepAliveTimeout: 60_000 }),
        }),
    });

  • tls and TLSOptions — Configure TLS via a custom fetch implementation with an undici Agent, or use the NODE_EXTRA_CA_CERTS environment variable.
  • requestInterceptor and RequestInterceptor type — Wrap the fetch function to intercept or modify requests before they are sent.
  • adapter and AdapterConfig type — Use the fetch option instead.
  • RequestConfig type (was an alias for Axios' InternalAxiosRequestConfig) — Removed entirely.
  • attachOriginalToWebAPIRequestError option — Removed. The original error is now always available via the standard cause property on WebAPIRequestError.

... (truncated)

Commits

• 70e15b8 chore: release (#2653)
• fc98c8c feat: Node Slack SDK major version release candidate (#2603)
• c37b47e docs: updates webhook page to match readme (#2658)
• bb49d99 fix(web-api): redact response body in debug logs (#2652)
• 2b6a0ce chore: release (#2650)
• a2f6e77 feat(webhook): add opt-in retries to IncomingWebhook and WebhookTrigger (#2641)
• a5bd5c8 feat(webhook): add WebhookTrigger class for Workflow Builder triggers (#2615)
• b0e335b chore: release (#2649)
• a795b86 feat: expand app manifest types for agent apps (#2648)
• 12b94a2 chore: release (#2642)
• Additional commits viewable in compare view

[nearform-lastlight]

This is a major version bump (@slack/web-api 7.x → 8.x) and cannot be auto-merged — it carries breaking changes that need a human review before landing.

Breaking changes in v8.0.0 relevant to this codebase:

• Error handling redesigned. Error objects are now proper Error subclasses (WebAPIPlatformError, WebAPIRequestError, etc.) instead of plain objects with a .code property. Any catch blocks checking error.code === ErrorCode.* must be migrated to instanceof checks.
• axios removed; replaced by native Fetch API. All WebClientOptions that relied on axios internals are gone: agent, tls/TLSOptions, requestInterceptor/RequestInterceptor, adapter/AdapterConfig, RequestConfig, and attachOriginalToWebAPIRequestError.
• Node.js minimum raised from 18 to 20. If any environment runs Node 18, this upgrade will break at startup.
• WebAPIHTTPError.headers type changed from IncomingHttpHeaders to Record<string, string>.

Recommended actions before merging:

1. Search the server code for error.code checks against ErrorCode.* and update to instanceof WebAPIPlatformError (or the appropriate subclass).
2. Check whether WebClient is instantiated with any of the removed options (agent, tls, requestInterceptor, adapter).
3. Confirm all deployment targets run Node.js ≥ 20.