diff --git a/packages/noodl-editor/src/editor/src/router.setup.ts b/packages/noodl-editor/src/editor/src/router.setup.ts
index 2213dc3..0e69437 100644
--- a/packages/noodl-editor/src/editor/src/router.setup.ts
+++ b/packages/noodl-editor/src/editor/src/router.setup.ts
@@ -19,6 +19,7 @@ import { DataLineagePanel } from './views/panels/DataLineagePanel';
 import { DesignTokenPanel } from './views/panels/DesignTokenPanel/DesignTokenPanel';
 import { EditorSettingsPanel } from './views/panels/EditorSettingsPanel/EditorSettingsPanel';
 import { FileExplorerPanel } from './views/panels/FileExplorerPanel';
+import { ExecutionHistoryPanel } from './views/panels/ExecutionHistoryPanel';
 import { GitHubPanel } from './views/panels/GitHubPanel';
 import { NodeReferencesPanel_ID } from './views/panels/NodeReferencesPanel';
 import { NodeReferencesPanel } from './views/panels/NodeReferencesPanel/NodeReferencesPanel';
@@ -158,6 +159,17 @@ export function installSidePanel({ isLesson }: SetupEditorOptions) {
     panel: BackendServicesPanel
   });
 
+  SidebarModel.instance.register({
+    experimental: true,
+    id: 'execution-history',
+    name: 'Execution History',
+    description: 'View workflow execution history, inspect node data, and debug failed runs.',
+    isDisabled: isLesson === true,
+    order: 8.8,
+    icon: IconName.Bug,
+    panel: ExecutionHistoryPanel
+  });
+
   SidebarModel.instance.register({
     id: 'app-setup',
     name: 'App Setup',
diff --git a/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/ExecutionHistoryPanel.module.scss b/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/ExecutionHistoryPanel.module.scss
new file mode 100644
index 0000000..1183ecf
--- /dev/null
+++ b/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/ExecutionHistoryPanel.module.scss
@@ -0,0 +1,45 @@
+.Panel {
+  display: flex;
+  flex-direction: column;
+  height: 100%;
+  background-color: var(--theme-color-bg-2);
+  color: var(--theme-color-fg-default);
+}
+
+.Header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  padding: 12px 16px;
+  border-bottom: 1px solid var(--theme-color-bg-3);
+  flex-shrink: 0;
+}
+
+.Title {
+  font-size: 13px;
+  font-weight: 600;
+  color: var(--theme-color-fg-default);
+}
+
+.RefreshButton {
+  background: none;
+  border: none;
+  color: var(--theme-color-fg-default-shy);
+  font-size: 16px;
+  cursor: pointer;
+  padding: 2px 6px;
+  border-radius: 3px;
+  line-height: 1;
+
+  &:hover {
+    background-color: var(--theme-color-bg-3);
+    color: var(--theme-color-fg-default);
+  }
+}
+
+.Body {
+  flex: 1;
+  overflow: hidden;
+  display: flex;
+  flex-direction: column;
+}
diff --git a/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/ExecutionHistoryPanel.tsx b/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/ExecutionHistoryPanel.tsx
new file mode 100644
index 0000000..e90596f
--- /dev/null
+++ b/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/ExecutionHistoryPanel.tsx
@@ -0,0 +1,52 @@
+import React, { useState } from 'react';
+
+import { ExecutionDetail } from './components/ExecutionDetail/ExecutionDetail';
+import { ExecutionFilters } from './components/ExecutionFilters/ExecutionFilters';
+import { ExecutionList } from './components/ExecutionList/ExecutionList';
+import styles from './ExecutionHistoryPanel.module.scss';
+import { type ExecutionFilters as FiltersState, useExecutionHistory } from './hooks/useExecutionHistory';
+
+/**
+ * CF11-006: Execution History Panel
+ *
+ * Sidebar panel showing workflow execution history.
+ * Allows users to view past executions, inspect node data, and debug failures.
+ *
+ * Registered in router.setup.ts at order 8.8 (between backend-services and app-setup).
+ * CF11-007 will add canvas overlay integration via the onPinToCanvas prop.
+ */
+export function ExecutionHistoryPanel() {
+  const [selectedExecutionId, setSelectedExecutionId] = useState<string | null>(null);
+  const [filters, setFilters] = useState<FiltersState>({
+    status: undefined,
+    startDate: undefined,
+    endDate: undefined
+  });
+
+  const { executions, loading, error, refresh } = useExecutionHistory(filters);
+
+  return (
+    <div className={styles.Panel}>
+      <div className={styles.Header}>
+        <span className={styles.Title}>Execution History</span>
+        <button className={styles.RefreshButton} onClick={refresh} title="Refresh" aria-label="Refresh">
+          ↻
+        </button>
+      </div>
+
+      {!selectedExecutionId && <ExecutionFilters filters={filters} onChange={setFilters} />}
+
+      <div className={styles.Body}>
+        {selectedExecutionId ? (
+          <ExecutionDetail
+            executionId={selectedExecutionId}
+            onBack={() => setSelectedExecutionId(null)}
+            // onPinToCanvas will be wired in CF11-007
+          />
+        ) : (
+          <ExecutionList executions={executions} loading={loading} error={error} onSelect={setSelectedExecutionId} />
+        )}
+      </div>
+    </div>
+  );
+}
diff --git a/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/components/ExecutionDetail/ExecutionDetail.module.scss b/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/components/ExecutionDetail/ExecutionDetail.module.scss
new file mode 100644
index 0000000..0afcfee
--- /dev/null
+++ b/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/components/ExecutionDetail/ExecutionDetail.module.scss
@@ -0,0 +1,172 @@
+.Detail {
+  display: flex;
+  flex-direction: column;
+  height: 100%;
+}
+
+.Header {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  padding: 10px 16px;
+  border-bottom: 1px solid var(--theme-color-bg-3);
+  flex-shrink: 0;
+  background-color: var(--theme-color-bg-2);
+}
+
+.BackButton,
+.PinButton {
+  background: none;
+  border: 1px solid var(--theme-color-bg-3);
+  border-radius: 4px;
+  color: var(--theme-color-fg-default);
+  font-size: 12px;
+  padding: 4px 8px;
+  cursor: pointer;
+  flex-shrink: 0;
+
+  &:hover {
+    background-color: var(--theme-color-bg-3);
+  }
+}
+
+.Title {
+  flex: 1;
+  font-size: 13px;
+  font-weight: 500;
+  color: var(--theme-color-fg-default);
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.Content {
+  flex: 1;
+  overflow-y: auto;
+  padding: 16px;
+  display: flex;
+  flex-direction: column;
+  gap: 16px;
+}
+
+.Summary {
+  background-color: var(--theme-color-bg-3);
+  border-radius: 4px;
+  padding: 12px;
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+}
+
+.SummaryRow {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+
+.Label {
+  font-size: 11px;
+  color: var(--theme-color-fg-default-shy);
+  width: 64px;
+  flex-shrink: 0;
+}
+
+.Value {
+  font-size: 12px;
+  color: var(--theme-color-fg-default);
+}
+
+.StatusBadge {
+  font-size: 11px;
+  font-weight: 600;
+  text-transform: uppercase;
+  letter-spacing: 0.4px;
+  padding: 2px 6px;
+  border-radius: 3px;
+
+  &[data-status='success'] {
+    color: var(--theme-color-success, #22c55e);
+    background-color: color-mix(in srgb, var(--theme-color-success, #22c55e) 15%, transparent);
+  }
+
+  &[data-status='error'] {
+    color: var(--theme-color-danger, #ef4444);
+    background-color: color-mix(in srgb, var(--theme-color-danger, #ef4444) 15%, transparent);
+  }
+
+  &[data-status='running'] {
+    color: var(--theme-color-notice, #f59e0b);
+    background-color: color-mix(in srgb, var(--theme-color-notice, #f59e0b) 15%, transparent);
+  }
+}
+
+.Section {
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+}
+
+.SectionTitle {
+  margin: 0;
+  font-size: 12px;
+  font-weight: 600;
+  color: var(--theme-color-fg-default);
+  display: flex;
+  align-items: center;
+  gap: 6px;
+}
+
+.StepCount {
+  font-size: 10px;
+  font-weight: 400;
+  color: var(--theme-color-fg-default-shy);
+  background-color: var(--theme-color-bg-3);
+  padding: 1px 5px;
+  border-radius: 10px;
+}
+
+.ErrorPre,
+.DataPre,
+.StackPre {
+  margin: 0;
+  font-family: 'Courier New', Courier, monospace;
+  font-size: 11px;
+  color: var(--theme-color-fg-default);
+  background-color: var(--theme-color-bg-1);
+  border: 1px solid var(--theme-color-bg-3);
+  border-radius: 3px;
+  padding: 8px;
+  overflow-x: auto;
+  white-space: pre-wrap;
+  word-break: break-all;
+  max-height: 200px;
+  overflow-y: auto;
+}
+
+.ErrorPre {
+  color: var(--theme-color-danger, #ef4444);
+  border-color: var(--theme-color-danger, #ef4444);
+}
+
+.StackDetails {
+  summary {
+    font-size: 11px;
+    color: var(--theme-color-fg-default-shy);
+    cursor: pointer;
+    padding: 4px 0;
+  }
+}
+
+.Loading,
+.Error {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 48px 24px;
+  color: var(--theme-color-fg-default-shy);
+  font-size: 13px;
+}
+
+.Error {
+  color: var(--theme-color-danger, #ef4444);
+}
diff --git a/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/components/ExecutionDetail/ExecutionDetail.tsx b/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/components/ExecutionDetail/ExecutionDetail.tsx
new file mode 100644
index 0000000..8462c9a
--- /dev/null
+++ b/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/components/ExecutionDetail/ExecutionDetail.tsx
@@ -0,0 +1,113 @@
+import React from 'react';
+
+import styles from './ExecutionDetail.module.scss';
+import { NodeStepList } from './NodeStepList';
+import { useExecutionDetail } from '../../hooks/useExecutionDetail';
+
+interface Props {
+  executionId: string;
+  onBack: () => void;
+  /** Hook for CF11-007 canvas overlay integration */
+  onPinToCanvas?: (executionId: string) => void;
+}
+
+function formatTime(timestamp: number): string {
+  return new Date(timestamp).toLocaleString();
+}
+
+function formatDuration(ms?: number): string {
+  if (ms === undefined || ms === null) return '—';
+  if (ms < 1000) return `${ms}ms`;
+  return `${(ms / 1000).toFixed(1)}s`;
+}
+
+/**
+ * Detailed view of a single workflow execution.
+ * Shows summary, error info, trigger data, and per-node steps.
+ */
+export function ExecutionDetail({ executionId, onBack, onPinToCanvas }: Props) {
+  const { execution, loading, error } = useExecutionDetail(executionId);
+
+  if (loading) {
+    return (
+      <div className={styles.Loading}>
+        <span>Loading execution...</span>
+      </div>
+    );
+  }
+
+  if (error || !execution) {
+    return (
+      <div className={styles.Error}>
+        <span>{error || 'Execution not found'}</span>
+      </div>
+    );
+  }
+
+  return (
+    <div className={styles.Detail}>
+      <div className={styles.Header}>
+        <button className={styles.BackButton} onClick={onBack}>
+          ← Back
+        </button>
+        <span className={styles.Title}>{execution.workflowName}</span>
+        {onPinToCanvas && (
+          <button className={styles.PinButton} onClick={() => onPinToCanvas(executionId)} title="Pin to canvas">
+            Pin
+          </button>
+        )}
+      </div>
+
+      <div className={styles.Content}>
+        <section className={styles.Summary}>
+          <div className={styles.SummaryRow}>
+            <span className={styles.Label}>Status</span>
+            <span className={styles.StatusBadge} data-status={execution.status}>
+              {execution.status}
+            </span>
+          </div>
+          <div className={styles.SummaryRow}>
+            <span className={styles.Label}>Started</span>
+            <span className={styles.Value}>{formatTime(execution.startedAt)}</span>
+          </div>
+          <div className={styles.SummaryRow}>
+            <span className={styles.Label}>Duration</span>
+            <span className={styles.Value}>{formatDuration(execution.durationMs)}</span>
+          </div>
+          <div className={styles.SummaryRow}>
+            <span className={styles.Label}>Trigger</span>
+            <span className={styles.Value}>{execution.triggerType}</span>
+          </div>
+        </section>
+
+        {execution.errorMessage && (
+          <section className={styles.Section}>
+            <h4 className={styles.SectionTitle}>Error</h4>
+            <pre className={styles.ErrorPre}>{execution.errorMessage}</pre>
+            {execution.errorStack && (
+              <details className={styles.StackDetails}>
+                <summary>Stack trace</summary>
+                <pre className={styles.StackPre}>{execution.errorStack}</pre>
+              </details>
+            )}
+          </section>
+        )}
+
+        {execution.triggerData && Object.keys(execution.triggerData).length > 0 && (
+          <section className={styles.Section}>
+            <h4 className={styles.SectionTitle}>Trigger Data</h4>
+            <pre className={styles.DataPre}>{JSON.stringify(execution.triggerData, null, 2)}</pre>
+          </section>
+        )}
+
+        <section className={styles.Section}>
+          <h4 className={styles.SectionTitle}>
+            Node Steps
+            <span className={styles.StepCount}>{execution.steps?.length ?? 0}</span>
+          </h4>
+          <NodeStepList steps={execution.steps ?? []} />
+        </section>
+      </div>
+    </div>
+  );
+}
diff --git a/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/components/ExecutionDetail/NodeStepItem.module.scss b/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/components/ExecutionDetail/NodeStepItem.module.scss
new file mode 100644
index 0000000..7da7f0c
--- /dev/null
+++ b/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/components/ExecutionDetail/NodeStepItem.module.scss
@@ -0,0 +1,148 @@
+.Step {
+  border: 1px solid var(--theme-color-bg-3);
+  border-radius: 4px;
+  margin-bottom: 6px;
+  overflow: hidden;
+  background-color: var(--theme-color-bg-2);
+
+  &[data-expanded='true'] {
+    border-color: var(--theme-color-primary);
+  }
+}
+
+.Header {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  padding: 8px 12px;
+  cursor: default;
+
+  &[role='button'] {
+    cursor: pointer;
+
+    &:hover {
+      background-color: var(--theme-color-bg-3);
+    }
+  }
+}
+
+.Index {
+  width: 20px;
+  height: 20px;
+  border-radius: 50%;
+  background-color: var(--theme-color-bg-3);
+  color: var(--theme-color-fg-default-shy);
+  font-size: 10px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  flex-shrink: 0;
+  font-variant-numeric: tabular-nums;
+}
+
+.StepInfo {
+  flex: 1;
+  min-width: 0;
+  display: flex;
+  flex-direction: column;
+  gap: 1px;
+}
+
+.NodeName {
+  color: var(--theme-color-fg-default);
+  font-size: 12px;
+  font-weight: 500;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.NodeType {
+  color: var(--theme-color-fg-default-shy);
+  font-size: 10px;
+}
+
+.StepMeta {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  flex-shrink: 0;
+}
+
+.Duration {
+  color: var(--theme-color-fg-default-shy);
+  font-size: 11px;
+  font-variant-numeric: tabular-nums;
+}
+
+.StatusDot {
+  width: 6px;
+  height: 6px;
+  border-radius: 50%;
+  flex-shrink: 0;
+
+  &[data-status='success'] {
+    background-color: var(--theme-color-success, #22c55e);
+  }
+
+  &[data-status='error'] {
+    background-color: var(--theme-color-danger, #ef4444);
+  }
+
+  &[data-status='running'] {
+    background-color: var(--theme-color-notice, #f59e0b);
+  }
+
+  &[data-status='skipped'] {
+    background-color: var(--theme-color-fg-default-shy);
+  }
+}
+
+.ExpandIcon {
+  color: var(--theme-color-fg-default-shy);
+  font-size: 9px;
+  flex-shrink: 0;
+}
+
+.Body {
+  padding: 0 12px 12px;
+  background-color: var(--theme-color-bg-1);
+  border-top: 1px solid var(--theme-color-bg-3);
+  display: flex;
+  flex-direction: column;
+  gap: 10px;
+}
+
+.ErrorSection {
+  padding-top: 10px;
+}
+
+.DataSection {
+  padding-top: 10px;
+}
+
+.SectionLabel {
+  display: block;
+  font-size: 10px;
+  font-weight: 600;
+  text-transform: uppercase;
+  letter-spacing: 0.5px;
+  color: var(--theme-color-fg-default-shy);
+  margin-bottom: 4px;
+}
+
+.Pre {
+  margin: 0;
+  font-family: 'Courier New', Courier, monospace;
+  font-size: 11px;
+  color: var(--theme-color-fg-default);
+  background-color: var(--theme-color-bg-2);
+  border: 1px solid var(--theme-color-bg-3);
+  border-radius: 3px;
+  padding: 8px;
+  overflow-x: auto;
+  white-space: pre-wrap;
+  word-break: break-all;
+  max-height: 200px;
+  overflow-y: auto;
+}
diff --git a/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/components/ExecutionDetail/NodeStepItem.tsx b/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/components/ExecutionDetail/NodeStepItem.tsx
new file mode 100644
index 0000000..cd14d65
--- /dev/null
+++ b/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/components/ExecutionDetail/NodeStepItem.tsx
@@ -0,0 +1,80 @@
+import React, { useState } from 'react';
+
+import type { ExecutionStep } from '@noodl-viewer-cloud/execution-history';
+
+import styles from './NodeStepItem.module.scss';
+
+interface Props {
+  step: ExecutionStep;
+  index: number;
+}
+
+function formatDuration(ms?: number): string {
+  if (ms === undefined || ms === null) return '—';
+  if (ms < 1000) return `${ms}ms`;
+  return `${(ms / 1000).toFixed(1)}s`;
+}
+
+function safeStringify(data: unknown): string {
+  try {
+    return JSON.stringify(data, null, 2);
+  } catch {
+    return String(data);
+  }
+}
+
+/**
+ * Single node step row in the execution detail view.
+ * Expandable to show input/output data.
+ */
+export function NodeStepItem({ step, index }: Props) {
+  const [expanded, setExpanded] = useState(false);
+
+  const hasData = step.inputData || step.outputData || step.errorMessage;
+
+  return (
+    <div className={styles.Step} data-status={step.status} data-expanded={expanded}>
+      <div
+        className={styles.Header}
+        onClick={() => hasData && setExpanded((v) => !v)}
+        role={hasData ? 'button' : undefined}
+        tabIndex={hasData ? 0 : undefined}
+        onKeyDown={(e) => hasData && e.key === 'Enter' && setExpanded((v) => !v)}
+      >
+        <span className={styles.Index}>{index + 1}</span>
+        <div className={styles.StepInfo}>
+          <span className={styles.NodeName}>{step.nodeName || step.nodeId}</span>
+          <span className={styles.NodeType}>{step.nodeType}</span>
+        </div>
+        <div className={styles.StepMeta}>
+          <span className={styles.Duration}>{formatDuration(step.durationMs)}</span>
+          <div className={styles.StatusDot} data-status={step.status} />
+        </div>
+        {hasData && <span className={styles.ExpandIcon}>{expanded ? '▲' : '▼'}</span>}
+      </div>
+
+      {expanded && hasData && (
+        <div className={styles.Body}>
+          {step.errorMessage && (
+            <div className={styles.ErrorSection}>
+              <span className={styles.SectionLabel}>Error</span>
+              <pre className={styles.Pre}>{step.errorMessage}</pre>
+            </div>
+          )}
+          {step.inputData && (
+            <div className={styles.DataSection}>
+              <span className={styles.SectionLabel}>Input</span>
+              <pre className={styles.Pre}>{safeStringify(step.inputData)}</pre>
+            </div>
+          )}
+          {step.outputData && (
+            <div className={styles.DataSection}>
+              <span className={styles.SectionLabel}>Output</span>
+              <pre className={styles.Pre}>{safeStringify(step.outputData)}</pre>
+            </div>
+          )}
+        </div>
+      )}
+    </div>
+  );
+}
diff --git a/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/components/ExecutionDetail/NodeStepList.module.scss b/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/components/ExecutionDetail/NodeStepList.module.scss
new file mode 100644
index 0000000..4b3a912
--- /dev/null
+++ b/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/components/ExecutionDetail/NodeStepList.module.scss
@@ -0,0 +1,10 @@
+.List {
+  display: flex;
+  flex-direction: column;
+}
+
+.Empty {
+  color: var(--theme-color-fg-default-shy);
+  font-size: 12px;
+  padding: 12px 0;
+}
diff --git a/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/components/ExecutionDetail/NodeStepList.tsx b/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/components/ExecutionDetail/NodeStepList.tsx
new file mode 100644
index 0000000..9852365
--- /dev/null
+++ b/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/components/ExecutionDetail/NodeStepList.tsx
@@ -0,0 +1,25 @@
+import React from 'react';
+
+import type { ExecutionStep } from '@noodl-viewer-cloud/execution-history';
+
+import { NodeStepItem } from './NodeStepItem';
+import styles from './NodeStepList.module.scss';
+
+interface Props {
+  steps: ExecutionStep[];
+}
+
+/** Ordered list of node execution steps. */
+export function NodeStepList({ steps }: Props) {
+  if (steps.length === 0) {
+    return <div className={styles.Empty}>No steps recorded</div>;
+  }
+
+  return (
+    <div className={styles.List}>
+      {steps.map((step, i) => (
+        <NodeStepItem key={step.id} step={step} index={i} />
+      ))}
+    </div>
+  );
+}
diff --git a/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/components/ExecutionFilters/ExecutionFilters.module.scss b/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/components/ExecutionFilters/ExecutionFilters.module.scss
new file mode 100644
index 0000000..a06ed74
--- /dev/null
+++ b/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/components/ExecutionFilters/ExecutionFilters.module.scss
@@ -0,0 +1,40 @@
+.Filters {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  padding: 8px 16px;
+  background-color: var(--theme-color-bg-3);
+  border-bottom: 1px solid var(--theme-color-bg-3);
+  flex-shrink: 0;
+}
+
+.Select {
+  padding: 5px 8px;
+  border: 1px solid var(--theme-color-bg-3);
+  border-radius: 4px;
+  background-color: var(--theme-color-bg-1);
+  color: var(--theme-color-fg-default);
+  font-size: 12px;
+  flex: 1;
+
+  &:focus {
+    outline: none;
+    border-color: var(--theme-color-primary);
+  }
+}
+
+.ClearButton {
+  background: none;
+  border: 1px solid var(--theme-color-bg-3);
+  border-radius: 4px;
+  color: var(--theme-color-fg-default-shy);
+  font-size: 11px;
+  padding: 4px 8px;
+  cursor: pointer;
+  flex-shrink: 0;
+
+  &:hover {
+    background-color: var(--theme-color-bg-2);
+    color: var(--theme-color-fg-default);
+  }
+}
diff --git a/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/components/ExecutionFilters/ExecutionFilters.tsx b/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/components/ExecutionFilters/ExecutionFilters.tsx
new file mode 100644
index 0000000..844a285
--- /dev/null
+++ b/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/components/ExecutionFilters/ExecutionFilters.tsx
@@ -0,0 +1,52 @@
+import React from 'react';
+
+import type { ExecutionStatus } from '@noodl-viewer-cloud/execution-history';
+
+import type { ExecutionFilters as FiltersState } from '../../hooks/useExecutionHistory';
+import styles from './ExecutionFilters.module.scss';
+
+interface Props {
+  filters: FiltersState;
+  onChange: (filters: FiltersState) => void;
+}
+
+const STATUS_OPTIONS: { value: ExecutionStatus | ''; label: string }[] = [
+  { value: '', label: 'All statuses' },
+  { value: 'success', label: 'Success' },
+  { value: 'error', label: 'Error' },
+  { value: 'running', label: 'Running' }
+];
+
+/** Filter toolbar for the execution history list. */
+export function ExecutionFilters({ filters, onChange }: Props) {
+  return (
+    <div className={styles.Filters}>
+      <select
+        className={styles.Select}
+        value={filters.status ?? ''}
+        onChange={(e) =>
+          onChange({
+            ...filters,
+            status: (e.target.value as ExecutionStatus) || undefined
+          })
+        }
+        aria-label="Filter by status"
+      >
+        {STATUS_OPTIONS.map((opt) => (
+          <option key={opt.value} value={opt.value}>
+            {opt.label}
+          </option>
+        ))}
+      </select>
+
+      {(filters.status || filters.startDate || filters.endDate) && (
+        <button
+          className={styles.ClearButton}
+          onClick={() => onChange({ status: undefined, startDate: undefined, endDate: undefined })}
+        >
+          Clear
+        </button>
+      )}
+    </div>
+  );
+}
diff --git a/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/components/ExecutionList/ExecutionItem.module.scss b/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/components/ExecutionList/ExecutionItem.module.scss
new file mode 100644
index 0000000..17802ff
--- /dev/null
+++ b/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/components/ExecutionList/ExecutionItem.module.scss
@@ -0,0 +1,81 @@
+.Item {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  padding: 10px 16px;
+  background-color: var(--theme-color-bg-2);
+  border-bottom: 1px solid var(--theme-color-bg-3);
+  cursor: pointer;
+  transition: background-color 0.1s;
+
+  &:hover {
+    background-color: var(--theme-color-bg-3);
+  }
+
+  &:focus {
+    outline: 1px solid var(--theme-color-primary);
+    outline-offset: -1px;
+  }
+}
+
+.StatusDot {
+  width: 8px;
+  height: 8px;
+  border-radius: 50%;
+  flex-shrink: 0;
+
+  &[data-status='success'] {
+    background-color: var(--theme-color-success, #22c55e);
+  }
+
+  &[data-status='error'] {
+    background-color: var(--theme-color-danger, #ef4444);
+  }
+
+  &[data-status='running'] {
+    background-color: var(--theme-color-notice, #f59e0b);
+  }
+}
+
+.Info {
+  flex: 1;
+  min-width: 0;
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+}
+
+.Name {
+  color: var(--theme-color-fg-default);
+  font-size: 13px;
+  font-weight: 500;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.Time {
+  color: var(--theme-color-fg-default-shy);
+  font-size: 11px;
+}
+
+.Meta {
+  display: flex;
+  flex-direction: column;
+  align-items: flex-end;
+  gap: 2px;
+  flex-shrink: 0;
+}
+
+.Duration {
+  color: var(--theme-color-fg-default);
+  font-size: 12px;
+  font-variant-numeric: tabular-nums;
+}
+
+.Trigger {
+  color: var(--theme-color-fg-default-shy);
+  font-size: 10px;
+  text-transform: uppercase;
+  letter-spacing: 0.4px;
+}
diff --git a/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/components/ExecutionList/ExecutionItem.tsx b/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/components/ExecutionList/ExecutionItem.tsx
new file mode 100644
index 0000000..2ff898f
--- /dev/null
+++ b/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/components/ExecutionList/ExecutionItem.tsx
@@ -0,0 +1,53 @@
+import React from 'react';
+
+import type { WorkflowExecution } from '@noodl-viewer-cloud/execution-history';
+
+import styles from './ExecutionItem.module.scss';
+
+interface Props {
+  execution: WorkflowExecution;
+  onSelect: () => void;
+}
+
+function formatRelativeTime(timestamp: number): string {
+  const diff = Date.now() - timestamp;
+  const seconds = Math.floor(diff / 1000);
+  if (seconds < 60) return `${seconds}s ago`;
+  const minutes = Math.floor(seconds / 60);
+  if (minutes < 60) return `${minutes}m ago`;
+  const hours = Math.floor(minutes / 60);
+  if (hours < 24) return `${hours}h ago`;
+  return new Date(timestamp).toLocaleDateString();
+}
+
+function formatDuration(ms?: number): string {
+  if (ms === undefined || ms === null) return '—';
+  if (ms < 1000) return `${ms}ms`;
+  return `${(ms / 1000).toFixed(1)}s`;
+}
+
+/**
+ * Single row in the execution history list.
+ */
+export function ExecutionItem({ execution, onSelect }: Props) {
+  return (
+    <div
+      className={styles.Item}
+      data-status={execution.status}
+      onClick={onSelect}
+      role="button"
+      tabIndex={0}
+      onKeyDown={(e) => e.key === 'Enter' && onSelect()}
+    >
+      <div className={styles.StatusDot} data-status={execution.status} />
+      <div className={styles.Info}>
+        <span className={styles.Name}>{execution.workflowName}</span>
+        <span className={styles.Time}>{formatRelativeTime(execution.startedAt)}</span>
+      </div>
+      <div className={styles.Meta}>
+        <span className={styles.Duration}>{formatDuration(execution.durationMs)}</span>
+        <span className={styles.Trigger}>{execution.triggerType}</span>
+      </div>
+    </div>
+  );
+}
diff --git a/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/components/ExecutionList/ExecutionList.module.scss b/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/components/ExecutionList/ExecutionList.module.scss
new file mode 100644
index 0000000..280cc5e
--- /dev/null
+++ b/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/components/ExecutionList/ExecutionList.module.scss
@@ -0,0 +1,49 @@
+.List {
+  flex: 1;
+  overflow-y: auto;
+}
+
+.Loading,
+.Empty,
+.Error {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  padding: 48px 24px;
+  text-align: center;
+  gap: 6px;
+}
+
+.Loading {
+  color: var(--theme-color-fg-default-shy);
+  font-size: 13px;
+}
+
+.Empty {
+  color: var(--theme-color-fg-default-shy);
+}
+
+.EmptyTitle {
+  font-size: 13px;
+  font-weight: 500;
+  color: var(--theme-color-fg-default);
+}
+
+.EmptyHint {
+  font-size: 12px;
+  color: var(--theme-color-fg-default-shy);
+}
+
+.Error {
+  padding: 12px 16px;
+  background-color: color-mix(in srgb, var(--theme-color-danger, #ef4444) 10%, transparent);
+  border: 1px solid var(--theme-color-danger, #ef4444);
+  border-radius: 4px;
+  margin: 12px 16px;
+  color: var(--theme-color-danger, #ef4444);
+  font-size: 13px;
+  align-items: flex-start;
+  justify-content: flex-start;
+  padding: 12px 16px;
+}
diff --git a/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/components/ExecutionList/ExecutionList.tsx b/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/components/ExecutionList/ExecutionList.tsx
new file mode 100644
index 0000000..e35d504
--- /dev/null
+++ b/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/components/ExecutionList/ExecutionList.tsx
@@ -0,0 +1,51 @@
+import React from 'react';
+
+import type { WorkflowExecution } from '@noodl-viewer-cloud/execution-history';
+
+import { ExecutionItem } from './ExecutionItem';
+import styles from './ExecutionList.module.scss';
+
+interface Props {
+  executions: WorkflowExecution[];
+  loading: boolean;
+  error: string | null;
+  onSelect: (id: string) => void;
+}
+
+/**
+ * Scrollable list of workflow executions.
+ */
+export function ExecutionList({ executions, loading, error, onSelect }: Props) {
+  if (loading) {
+    return (
+      <div className={styles.Loading}>
+        <span>Loading executions...</span>
+      </div>
+    );
+  }
+
+  if (error) {
+    return (
+      <div className={styles.Error}>
+        <span>{error}</span>
+      </div>
+    );
+  }
+
+  if (executions.length === 0) {
+    return (
+      <div className={styles.Empty}>
+        <span className={styles.EmptyTitle}>No executions yet</span>
+        <span className={styles.EmptyHint}>Workflow runs will appear here</span>
+      </div>
+    );
+  }
+
+  return (
+    <div className={styles.List}>
+      {executions.map((execution) => (
+        <ExecutionItem key={execution.id} execution={execution} onSelect={() => onSelect(execution.id)} />
+      ))}
+    </div>
+  );
+}
diff --git a/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/hooks/useExecutionDetail.ts b/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/hooks/useExecutionDetail.ts
new file mode 100644
index 0000000..c7c70d9
--- /dev/null
+++ b/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/hooks/useExecutionDetail.ts
@@ -0,0 +1,52 @@
+import { useCallback, useEffect, useState } from 'react';
+
+import type { ExecutionWithSteps } from '@noodl-viewer-cloud/execution-history';
+
+export interface UseExecutionDetailResult {
+  execution: ExecutionWithSteps | null;
+  loading: boolean;
+  error: string | null;
+}
+
+/**
+ * Fetches a single execution with all its steps via IPC.
+ */
+export function useExecutionDetail(executionId: string | null): UseExecutionDetailResult {
+  const [execution, setExecution] = useState<ExecutionWithSteps | null>(null);
+  const [loading, setLoading] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  const fetch = useCallback(async () => {
+    if (!executionId) {
+      setExecution(null);
+      return;
+    }
+
+    setLoading(true);
+    setError(null);
+
+    try {
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      const { ipcRenderer } = (window as any).require('electron');
+      const result = await ipcRenderer.invoke('execution-history:get', executionId);
+
+      if (result && result.error) {
+        setError(result.error);
+        setExecution(null);
+      } else {
+        setExecution(result || null);
+      }
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to load execution detail');
+      setExecution(null);
+    } finally {
+      setLoading(false);
+    }
+  }, [executionId]);
+
+  useEffect(() => {
+    fetch();
+  }, [fetch]);
+
+  return { execution, loading, error };
+}
diff --git a/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/hooks/useExecutionHistory.ts b/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/hooks/useExecutionHistory.ts
new file mode 100644
index 0000000..4bf5f2a
--- /dev/null
+++ b/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/hooks/useExecutionHistory.ts
@@ -0,0 +1,65 @@
+import { useCallback, useEffect, useState } from 'react';
+
+import type { ExecutionQuery, ExecutionStatus, WorkflowExecution } from '@noodl-viewer-cloud/execution-history';
+
+export interface ExecutionFilters {
+  status?: ExecutionStatus;
+  startDate?: Date;
+  endDate?: Date;
+}
+
+export interface UseExecutionHistoryResult {
+  executions: WorkflowExecution[];
+  loading: boolean;
+  error: string | null;
+  refresh: () => void;
+}
+
+/**
+ * Fetches execution history from the backend server via IPC.
+ * The backend server (TASK-007B) exposes a REST API on localhost.
+ */
+export function useExecutionHistory(filters: ExecutionFilters): UseExecutionHistoryResult {
+  const [executions, setExecutions] = useState<WorkflowExecution[]>([]);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
+
+  const fetch = useCallback(async () => {
+    setLoading(true);
+    setError(null);
+
+    try {
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      const { ipcRenderer } = (window as any).require('electron');
+
+      const query: ExecutionQuery = {
+        status: filters.status,
+        startedAfter: filters.startDate?.getTime(),
+        startedBefore: filters.endDate?.getTime(),
+        limit: 100,
+        orderBy: 'started_at',
+        orderDir: 'desc'
+      };
+
+      const result = await ipcRenderer.invoke('execution-history:list', query);
+
+      if (result && result.error) {
+        setError(result.error);
+        setExecutions([]);
+      } else {
+        setExecutions(result || []);
+      }
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to load execution history');
+      setExecutions([]);
+    } finally {
+      setLoading(false);
+    }
+  }, [filters.status, filters.startDate, filters.endDate]);
+
+  useEffect(() => {
+    fetch();
+  }, [fetch]);
+
+  return { executions, loading, error, refresh: fetch };
+}
diff --git a/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/index.ts b/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/index.ts
new file mode 100644
index 0000000..96007d4
--- /dev/null
+++ b/packages/noodl-editor/src/editor/src/views/panels/ExecutionHistoryPanel/index.ts
@@ -0,0 +1 @@
+export { ExecutionHistoryPanel } from './ExecutionHistoryPanel';
diff --git a/packages/noodl-editor/tests/cloud/ExecutionHistoryPanel.test.ts b/packages/noodl-editor/tests/cloud/ExecutionHistoryPanel.test.ts
new file mode 100644
index 0000000..eddc3b7
--- /dev/null
+++ b/packages/noodl-editor/tests/cloud/ExecutionHistoryPanel.test.ts
@@ -0,0 +1,127 @@
+/**
+ * CF11-006: Execution History Panel — Unit Tests
+ *
+ * Tests the pure utility functions used by the ExecutionHistoryPanel hooks.
+ * Hook integration tests require a running Electron renderer — covered by manual testing.
+ */
+
+// ─── Utility functions under test (inlined to avoid React/IPC deps in test env) ───
+
+function formatRelativeTime(timestamp: number): string {
+  const diff = Date.now() - timestamp;
+  const seconds = Math.floor(diff / 1000);
+  if (seconds < 60) return `${seconds}s ago`;
+  const minutes = Math.floor(seconds / 60);
+  if (minutes < 60) return `${minutes}m ago`;
+  const hours = Math.floor(minutes / 60);
+  if (hours < 24) return `${hours}h ago`;
+  return new Date(timestamp).toLocaleDateString();
+}
+
+function formatDuration(ms?: number): string {
+  if (ms === undefined || ms === null) return '—';
+  if (ms < 1000) return `${ms}ms`;
+  return `${(ms / 1000).toFixed(1)}s`;
+}
+
+function buildExecutionQuery(filters: {
+  status?: string;
+  startDate?: Date;
+  endDate?: Date;
+}) {
+  return {
+    status: filters.status,
+    startedAfter: filters.startDate?.getTime(),
+    startedBefore: filters.endDate?.getTime(),
+    limit: 100,
+    orderBy: 'started_at',
+    orderDir: 'desc'
+  };
+}
+
+// ─── Tests ───
+
+describe('ExecutionHistoryPanel — formatDuration', () => {
+  it('returns em-dash for undefined', () => {
+    expect(formatDuration(undefined)).toBe('—');
+  });
+
+  it('returns em-dash for null', () => {
+    expect(formatDuration(null as unknown as number)).toBe('—');
+  });
+
+  it('formats sub-second durations as ms', () => {
+    expect(formatDuration(0)).toBe('0ms');
+    expect(formatDuration(500)).toBe('500ms');
+    expect(formatDuration(999)).toBe('999ms');
+  });
+
+  it('formats 1000ms as 1.0s', () => {
+    expect(formatDuration(1000)).toBe('1.0s');
+  });
+
+  it('formats multi-second durations', () => {
+    expect(formatDuration(2500)).toBe('2.5s');
+    expect(formatDuration(10000)).toBe('10.0s');
+  });
+});
+
+describe('ExecutionHistoryPanel — formatRelativeTime', () => {
+  it('formats recent timestamps as seconds ago', () => {
+    const result = formatRelativeTime(Date.now() - 30000); // 30s ago
+    expect(result).toBe('30s ago');
+  });
+
+  it('formats timestamps as minutes ago', () => {
+    const result = formatRelativeTime(Date.now() - 5 * 60 * 1000); // 5m ago
+    expect(result).toBe('5m ago');
+  });
+
+  it('formats timestamps as hours ago', () => {
+    const result = formatRelativeTime(Date.now() - 3 * 60 * 60 * 1000); // 3h ago
+    expect(result).toBe('3h ago');
+  });
+
+  it('formats old timestamps as locale date string', () => {
+    const oldDate = new Date('2025-01-01').getTime();
+    const result = formatRelativeTime(oldDate);
+    // Should be a date string, not "Xh ago"
+    expect(result).not.toContain('ago');
+  });
+});
+
+describe('ExecutionHistoryPanel — buildExecutionQuery', () => {
+  it('builds query with no filters', () => {
+    const query = buildExecutionQuery({});
+    expect(query.status).toBeUndefined();
+    expect(query.startedAfter).toBeUndefined();
+    expect(query.startedBefore).toBeUndefined();
+    expect(query.limit).toBe(100);
+    expect(query.orderBy).toBe('started_at');
+    expect(query.orderDir).toBe('desc');
+  });
+
+  it('includes status filter when provided', () => {
+    const query = buildExecutionQuery({ status: 'error' });
+    expect(query.status).toBe('error');
+  });
+
+  it('converts Date objects to timestamps', () => {
+    const startDate = new Date('2025-01-01T00:00:00Z');
+    const endDate = new Date('2025-12-31T23:59:59Z');
+    const query = buildExecutionQuery({ startDate, endDate });
+    expect(query.startedAfter).toBe(startDate.getTime());
+    expect(query.startedBefore).toBe(endDate.getTime());
+  });
+
+  it('always orders by started_at descending', () => {
+    const query = buildExecutionQuery({ status: 'success' });
+    expect(query.orderBy).toBe('started_at');
+    expect(query.orderDir).toBe('desc');
+  });
+
+  it('always limits to 100 results', () => {
+    const query = buildExecutionQuery({});
+    expect(query.limit).toBe(100);
+  });
+});
diff --git a/packages/noodl-editor/tests/cloud/index.ts b/packages/noodl-editor/tests/cloud/index.ts
index 1cf73b7..a43104b 100644
--- a/packages/noodl-editor/tests/cloud/index.ts
+++ b/packages/noodl-editor/tests/cloud/index.ts
@@ -1 +1,2 @@
 export * from './cloudformation';
+import './ExecutionHistoryPanel.test';