Background Job Toasts — OpenClaw Control UI

Real-time bottom-right toast bar that shows running / complete / error status for all background processes in the OpenClaw Control UI: cron jobs, memory compaction, knowledge extraction, and any consumer that pushes to backgroundJobToasts.

Status: ✅ Active

Architecture

Data Type (ui/src/ui/app-view-state.ts)

export type BackgroundJobToast = {
  jobId: string;        // Unique identifier (use "cmp-" prefix for compaction)
  jobName: string;      // Human-readable label shown in the toast
  status: "running" | "complete" | "error";
  startedAt: number;    // Date.now()
  completedAt: number | null;
  errorMsg?: string;
};

backgroundJobToasts: BackgroundJobToast[] is a LitElement @state() property on OpenClawApp (app.ts). Assigning to it directly triggers an automatic re-render — no requestUpdate() needed for the toast array itself.

Toast Rendering (ui/src/ui/app-render.ts)

renderBackgroundJobToasts(state) renders the .bg-job-toasts container at the bottom of the app shell (called in the root render() function). It maps each toast to a .bg-job-toast--{status} div with an icon, name, and label.

Status indicators:

• running → spinner icon (CSS animation compaction-spin), blue tint, "running..."
• complete → checkmark icon, green tint, "done"
• error → X icon, red tint, "failed"

Styles (ui/src/styles/components.css)

.bg-job-toasts   { position: fixed; bottom: 24px; right: 24px; z-index: 9000; … }
.bg-job-toast    { border-radius: var(--radius-lg); background: var(--panel-strong); … }
.bg-job-toast--running  { color: var(--info); … }
.bg-job-toast--complete { color: var(--ok); … }
.bg-job-toast--error    { color: var(--danger); … }

Entry animation: bg-job-toast-in (0.2s, slide up from 6px).

Gateway Cron Event Enrichment (src/gateway/server-cron.ts)

The gateway's onEvent callback enriches cron events with the job name before broadcasting, so the UI can display a meaningful label even when the Cron tab hasn't been opened yet (and thus cronJobs isn't loaded):

onEvent: (evt) => {
  const jobForName = cron.getJob(evt.jobId);
  const enriched = jobForName?.name ? { ...evt, name: jobForName.name } : evt;
  params.broadcast("cron", enriched, { dropIfSlow: true });
  // ... rest of webhook handling
}

UI Cron Event Handler (ui/src/ui/app-gateway.ts)

const cronPayload = evt.payload as {
  jobId?: string;
  name?: string;       // ← enriched by gateway
  action?: string;
  status?: string;
  error?: string;
};
// Priority: event.name > loaded cronJobs list > fallback
const jobName = cronPayload.name ?? matchedJob?.name ?? "Background job";

Context Gauge + Compaction Button (ui/src/ui/app-render.helpers.ts)

The renderContextGauge(state) function renders a circular SVG ring in the chat toolbar. When compaction is running:

• The gauge ring is replaced by a spinning ⟳ icon
• A compactState.phase overlay modal appears with live status

Phase variables must be defined before the template:

const phaseLabel =
  compactState.phase === "running"
    ? "Summarizing your conversation…"
    : compactState.phase === "complete"
      ? "Done! Context has been reduced."
      : compactState.phase === "error"
        ? "Something went wrong."
        : "";
const isWorking = compactState.phase === "running";

compactState is read from (state as unknown as Record\x3Cstring, unknown>).__compactState — a plain property (not @state()), so app.requestUpdate() must be called explicitly after mutations.

Compaction flow:

1. Button click → __compactState = { active: true, phase: "running" } + push "running" toast → requestUpdate()
2. RPC sessions.compact resolves → update toast to "complete" with token counts → __compactState = {} → requestUpdate()
3. Auto-dismiss toast after 5 seconds

Files Modified

How to Push a Custom Toast from Anywhere

Any code with access to the OpenClawApp instance can push a toast:

const app = state as unknown as OpenClawApp;
const jobId = "my-job-" + Date.now();

// Start
app.backgroundJobToasts = [
  ...(app.backgroundJobToasts ?? []).filter(t => t.jobId !== jobId),
  { jobId, jobName: "My Task", status: "running", startedAt: Date.now(), completedAt: null },
];

// Complete (with auto-dismiss)
app.backgroundJobToasts = [
  ...(app.backgroundJobToasts ?? []).filter(t => t.jobId !== jobId),
  { jobId, jobName: "My Task done", status: "complete", startedAt: Date.now(), completedAt: Date.now() },
];
window.setTimeout(() => {
  app.backgroundJobToasts = (app.backgroundJobToasts ?? []).filter(t => t.jobId !== jobId);
}, 5000);

Prefix convention: Use "cmp-" for compaction jobs (filtered when a new compaction starts). Use a unique domain prefix for other job types.

Known Gotchas

• phaseLabel/isWorking must be defined before the template literal — referencing them without defining them compiles fine (TypeScript doesn't catch undeclared variables inside template literals) but renders as undefined at runtime, producing a blank modal with no text and no progress bar.
• __compactState is not @state() — always call app.requestUpdate() after mutating it, or the UI won't re-render.
• Cron job name fallback order matters — the name field in the event payload (gateway-enriched) must be checked before the local cronJobs list, because the list is only loaded when the Cron tab is open.
• backgroundJobToasts IS @state() — assigning the array triggers a re-render automatically; no requestUpdate() needed specifically for that.

Reference

See references/source-snapshot.md for a snapshot of the key code sections at time of writing.