Files
vercel__workflow/packages/web-shared/README.md
Mitul Shah 8393716687 Fix trace detail panel Input/Output flicker (selection-driven state machine) (#2637)
* Add selection-driven span-detail primitives

Extract the run/step/hook/sleep fetch+hydrate core out of useWorkflowResourceData
into a plain async fetchSpanDetailResource (no React state), and add a
selection-driven state machine in web-shared:

- deriveSpanDetailView / resourceNeedsFetchedDetail: pure view-model deriver
  whose status (idle/loading/ready/error) is a function of (selection, fetched
  detail), so it can never lag the selection.
- useSelectedSpanDetail: fetches a selected span's detail directly with a
  request-token to drop stale/out-of-order responses.

* Drive trace detail panel from the span-detail state machine

Replace the cross-package selection round-trip (EntityDetailPanel useEffect ->
onSpanSelect -> page spanSelection state -> useWorkflowResourceData -> context)
with a single injected fetchSpanDetail capability:

- EntityDetailPanel consumes useSelectedSpanDetail; its loading state now stays
  in phase with the selected span, so Input/Output no longer vanish and pop back
  in while navigating.
- SidebarDataContext drops spanDetailData/Loading/Error + onSpanSelect for a
  single fetchSpanDetail; RunDetailView injects it and drops the duplicate
  spanSelection state.
- WorkflowTraceViewer / RunTraceView take fetchSpanDetail too.

* Test span-detail view-model transitions; add changeset

Cover deriveSpanDetailView (idle/loading/ready/error, stale-detail rejection,
hooks ready inline) and resourceNeedsFetchedDetail.

* Trim redundant/narrative comments in span-detail state machine

Comment-only cleanup: drop PR-narration and cross-file duplication from the
deriveSpanDetailView / useSelectedSpanDetail / EntityDetailPanel / fetchSpanDetail
doc comments, keeping the non-obvious intent (request-token, error scoping,
decrypt closure).

* delete pointless coments

---------

Co-authored-by: Cursor Agent <cursoragent@cursor.com>
2026-06-26 16:42:47 -04:00

1.6 KiB

@workflow/web-shared

Workflow Observability UI primitives. See Workflow SDK for more information.

Usage

This package contains:

  • pre-styled, prop-driven UI components (no data fetching)

If you want a full observability experience with server actions already wired, take a look at @workflow/web instead.

It comes with pre-styled UI components that accept data + callbacks:

import { WorkflowTraceViewer } from '@workflow/web-shared';

export default function MyRunDetailView({ run, events, fetchSpanDetail }) {
  return (
    <WorkflowTraceViewer
      run={run}
      events={events}
      fetchSpanDetail={fetchSpanDetail}
    />
  );
}

Server actions and data fetching are intentionally not part of web-shared. Implement those in your app and pass data + callbacks into these components. If you need world run helpers, use @workflow/core/runtime.

Security notice: If you implement server-side data fetching using @workflow/world-vercel or similar backends, ensure that user-supplied IDs (runId, stepId, etc.) are validated before passing them to world functions. The server actions in @workflow/web do not include authentication — see that package's README for details on securing self-hosted deployments.

Styling

In order for tailwind classes to be picked up correctly, you might need to configure your NextJS app to use the correct CSS processor. E.g. if you're using PostCSS with TailwindCSS, you can do the following:

// postcss.config.mjs in your NextJS app
const config = {
  plugins: ['@tailwindcss/postcss'],
};

export default config;