diff --git a/src/app/panel-layout.ts b/src/app/panel-layout.ts
index 59c698fac..80fb129ff 100644
--- a/src/app/panel-layout.ts
+++ b/src/app/panel-layout.ts
@@ -780,7 +780,16 @@ export class PanelLayoutManager implements AppModule {
 
     this.createPanel('trade-policy', () => new TradePolicyPanel());
     this.createPanel('sanctions-pressure', () => new SanctionsPressurePanel());
-    this.createPanel('supply-chain', () => new SupplyChainPanel());
+    const supplyChainPanel = this.createPanel('supply-chain', () => new SupplyChainPanel());
+    if (supplyChainPanel) {
+      supplyChainPanel.setOnScenarioActivate((id, result) => {
+        this.ctx.map?.activateScenario(id, result);
+      });
+      supplyChainPanel.setOnDismissScenario(() => {
+        this.ctx.map?.deactivateScenario();
+      });
+      this.ctx.map?.setSupplyChainPanel(supplyChainPanel);
+    }
 
     this.createNewsPanel('africa', 'panels.africa');
     this.createNewsPanel('latam', 'panels.latam');
diff --git a/src/components/DeckGLMap.ts b/src/components/DeckGLMap.ts
index 10eb3b2f4..a86ec4f3f 100644
--- a/src/components/DeckGLMap.ts
+++ b/src/components/DeckGLMap.ts
@@ -401,6 +401,7 @@ export class DeckGLMap {
   private tradeRouteSegments: TradeRouteSegment[] = resolveTradeRouteSegments();
   private storedChokepointData: GetChokepointStatusResponse | null = null;
   private scenarioState: ScenarioVisualState | null = null;
+  private affectedIso2Set: Set<string> = new Set();
   private positiveEvents: PositiveGeoEvent[] = [];
   private kindnessPoints: KindnessPoint[] = [];
   private imageryScenes: ImageryScene[] = [];
@@ -1744,6 +1745,9 @@ export class DeckGLMap {
       const sanctionsLayer = this.createSanctionsChoroplethLayer();
       if (sanctionsLayer) layers.push(sanctionsLayer);
     }
+    // Scenario heat layer (affected countries tint)
+    const scenarioHeat = this.scenarioState ? this.createScenarioHeatLayer() : null;
+    if (scenarioHeat) layers.push(scenarioHeat);
     // Phase 8: Species recovery zones
     if (mapLayers.speciesRecovery && this.speciesRecoveryZones.length > 0) {
       layers.push(this.createSpeciesRecoveryLayer());
@@ -3526,6 +3530,23 @@ export class DeckGLMap {
     });
   }
 
+  private createScenarioHeatLayer(): GeoJsonLayer | null {
+    if (!this.affectedIso2Set.size || !this.countriesGeoJsonData) return null;
+    return new GeoJsonLayer({
+      id: 'scenario-heat-layer',
+      data: this.countriesGeoJsonData,
+      stroked: false,
+      filled: true,
+      extruded: false,
+      pickable: false,
+      getFillColor: (feature: { properties?: Record<string, unknown> }) => {
+        const code = feature.properties?.['ISO3166-1-Alpha-2'] as string | undefined;
+        return (code && this.affectedIso2Set.has(code) ? [220, 60, 40, 80] : [0, 0, 0, 0]) as [number, number, number, number];
+      },
+      updateTriggers: { getFillColor: [this.scenarioState?.scenarioId ?? null] },
+    });
+  }
+
   private createSpeciesRecoveryLayer(): ScatterplotLayer {
     return new ScatterplotLayer({
       id: 'species-recovery-layer',
@@ -5434,6 +5455,7 @@ export class DeckGLMap {
    */
   public setScenarioState(state: ScenarioVisualState | null): void {
     this.scenarioState = state;
+    this.affectedIso2Set = new Set(state?.affectedIso2s ?? []);
     this.render();
   }
 
diff --git a/src/components/GlobeMap.ts b/src/components/GlobeMap.ts
index da5dede32..a99437a3a 100644
--- a/src/components/GlobeMap.ts
+++ b/src/components/GlobeMap.ts
@@ -51,6 +51,7 @@ import { pinWebcam, isPinned } from '@/services/webcams/pinned-store';
 import type { WebcamEntry, WebcamCluster } from '@/generated/client/worldmonitor/webcam/v1/service_client';
 import type { TrafficAnomaly as ProtoTrafficAnomaly, DdosLocationHit } from '@/generated/client/worldmonitor/infrastructure/v1/service_client';
 import type { RadiationObservation } from '@/services/radiation';
+import type { ScenarioVisualState } from '@/config/scenario-templates';
 
 const SAT_COUNTRY_COLORS: Record<string, string> = { CN: '#ff2020', RU: '#ff8800', US: '#4488ff', EU: '#44cc44', KR: '#aa66ff', IN: '#ff66aa', TR: '#ff4466', OTHER: '#ccccff' };
 const SAT_TYPE_EMOJI: Record<string, string> = { sar: '\u{1F4E1}', optical: '\u{1F4F7}', military: '\u{1F396}', sigint: '\u{1F4FB}' };
@@ -396,7 +397,7 @@ interface GlobePath {
 interface GlobePolygon {
   coords: number[][][];
   name: string;
-  _kind: 'cii' | 'conflict' | 'imageryFootprint' | 'forecastCone';
+  _kind: 'cii' | 'conflict' | 'imageryFootprint' | 'forecastCone' | 'scenario';
   level?: string;
   score?: number;
 
@@ -526,6 +527,7 @@ export class GlobeMap {
   private cableDegradedIds = new Set<string>();
   private ciiScoresMap: Map<string, { score: number; level: string }> = new Map();
   private countriesGeoData: FeatureCollection<Geometry> | null = null;
+  private scenarioPolygons: GlobePolygon[] = [];
 
   // Current layers state
   private layers: MapLayers;
@@ -828,6 +830,7 @@ export class GlobeMap {
         if (d._kind === 'conflict') return GlobeMap.CONFLICT_CAP[d.intensity!] ?? GlobeMap.CONFLICT_CAP.low;
         if (d._kind === 'imageryFootprint') return 'rgba(0,0,0,0)';
         if (d._kind === 'forecastCone') return 'rgba(255,140,60,0.2)';
+        if (d._kind === 'scenario') return 'rgba(220,60,40,0.3)';
         return 'rgba(255,60,60,0.15)';
       })
       .polygonSideColor((d: GlobePolygon) => {
@@ -835,6 +838,7 @@ export class GlobeMap {
         if (d._kind === 'conflict') return GlobeMap.CONFLICT_SIDE[d.intensity!] ?? GlobeMap.CONFLICT_SIDE.low;
         if (d._kind === 'imageryFootprint') return 'rgba(0,0,0,0)';
         if (d._kind === 'forecastCone') return 'rgba(255,140,60,0.1)';
+        if (d._kind === 'scenario') return 'rgba(0,0,0,0)';
         return 'rgba(255,60,60,0.08)';
       })
       .polygonStrokeColor((d: GlobePolygon) => {
@@ -842,6 +846,7 @@ export class GlobeMap {
         if (d._kind === 'conflict') return GlobeMap.CONFLICT_STROKE[d.intensity!] ?? GlobeMap.CONFLICT_STROKE.low;
         if (d._kind === 'imageryFootprint') return '#00b4ff';
         if (d._kind === 'forecastCone') return 'rgba(255,140,60,0.5)';
+        if (d._kind === 'scenario') return 'transparent';
         return '#ff4444';
       })
       .polygonAltitude((d: GlobePolygon) => {
@@ -2088,11 +2093,33 @@ export class GlobeMap {
       polys.push(...this.stormConePolygons);
     }
 
+    if (this.scenarioPolygons.length) {
+      polys.push(...this.scenarioPolygons);
+    }
+
     (this.globe as any).polygonsData(polys);
   }
 
   // ─── Public data setters ──────────────────────────────────────────────────
 
+  public setScenarioState(state: ScenarioVisualState | null): void {
+    this.scenarioPolygons = [];
+    if (state?.affectedIso2s?.length && this.countriesGeoData) {
+      const affected = new Set(state.affectedIso2s);
+      for (const feat of this.countriesGeoData.features) {
+        const code = feat.properties?.['ISO3166-1-Alpha-2'] as string | undefined;
+        if (!code || !affected.has(code)) continue;
+        const geom = feat.geometry;
+        if (!geom) continue;
+        const rings = geom.type === 'Polygon' ? [geom.coordinates] : geom.type === 'MultiPolygon' ? geom.coordinates : [];
+        for (const ring of rings) {
+          this.scenarioPolygons.push({ coords: ring as number[][][], name: code, _kind: 'scenario' });
+        }
+      }
+    }
+    this.flushPolygons();
+  }
+
   public setCIIScores(scores: Array<{ code: string; score: number; level: string }>): void {
     this.ciiScoresMap = new Map(scores.map(s => [s.code, { score: s.score, level: s.level }]));
     this.flushPolygons();
diff --git a/src/components/Map.ts b/src/components/Map.ts
index e0677a437..f8d71a9c0 100644
--- a/src/components/Map.ts
+++ b/src/components/Map.ts
@@ -61,6 +61,7 @@ import { getAlertsNearLocation } from '@/services/geo-convergence';
 import { getCountryAtCoordinates, getCountryBbox } from '@/services/country-geometry';
 import type { CountryClickPayload } from './DeckGLMap';
 import { t } from '@/services/i18n';
+import type { ScenarioVisualState } from '@/config/scenario-templates';
 
 export type TimeRange = '1h' | '6h' | '24h' | '48h' | '7d' | 'all';
 export type MapView = 'global' | 'america' | 'mena' | 'eu' | 'asia' | 'latam' | 'africa' | 'oceania';
@@ -3407,6 +3408,10 @@ export class MapComponent {
     this.popup.setChokepointData(data);
   }
 
+  public setScenarioState(_state: ScenarioVisualState | null): void {
+    // SVG renderer: scenario fill deferred (no iso2 data binding on country elements)
+  }
+
   public setLayerLoading(layer: keyof MapLayers, loading: boolean): void {
     const btn = this.container.querySelector(`.layer-toggle[data-layer="${layer}"]`);
     if (btn) {
diff --git a/src/components/MapContainer.ts b/src/components/MapContainer.ts
index 8596604af..62e7760b2 100644
--- a/src/components/MapContainer.ts
+++ b/src/components/MapContainer.ts
@@ -49,6 +49,9 @@ import type { TrafficAnomaly as ProtoTrafficAnomaly, DdosLocationHit } from '@/g
 import type { DiseaseOutbreakItem } from '@/services/disease-outbreaks';
 import type { GetChokepointStatusResponse } from '@/services/supply-chain';
 import type { ScenarioVisualState, ScenarioResult } from '@/config/scenario-templates';
+import { getAuthState } from '@/services/auth-state';
+import { hasPremiumAccess } from '@/services/panel-gating';
+import { trackGateHit } from '@/services/analytics';
 
 export type { ScenarioVisualState, ScenarioResult };
 
@@ -90,6 +93,7 @@ export class MapContainer {
   private deckGLMap: DeckGLMap | null = null;
   private svgMap: MapComponent | null = null;
   private globeMap: GlobeMap | null = null;
+  private supplyChainPanel: import('@/components/SupplyChainPanel').SupplyChainPanel | null = null;
   private initialState: MapContainerState;
   private useDeckGL: boolean;
   private useGlobe: boolean;
@@ -970,22 +974,31 @@ export class MapContainer {
 
   // ─── Scenario Engine ─────────────────────────────────────────────────────────
 
+  public setSupplyChainPanel(panel: import('@/components/SupplyChainPanel').SupplyChainPanel): void {
+    this.supplyChainPanel = panel;
+  }
+
   /**
    * Activate a scenario across all active renderers.
-   * PRO-gated — free users trigger `trackGateHit('scenario')` only.
+   * PRO-gated — free users trigger `trackGateHit('scenario-engine')` only.
    *
    * @param scenarioId  Template ID from scenario-templates.ts
    * @param result      Computed result from the scenario worker
    */
   public activateScenario(scenarioId: string, result: ScenarioResult): void {
+    if (!hasPremiumAccess(getAuthState())) {
+      trackGateHit('scenario-engine');
+      return;
+    }
     const state: ScenarioVisualState = {
       scenarioId,
       disruptedChokepointIds: result.affectedChokepointIds,
       affectedIso2s: result.topImpactCountries.map((c: { iso2: string }) => c.iso2),
     };
-    // DeckGL is the primary renderer for scenario visuals.
-    // Globe and SVG support is deferred to Sprint D.
     this.deckGLMap?.setScenarioState(state);
+    this.svgMap?.setScenarioState(state);
+    this.globeMap?.setScenarioState(state);
+    this.supplyChainPanel?.showScenarioSummary(scenarioId, result);
   }
 
   /**
@@ -993,6 +1006,9 @@ export class MapContainer {
    */
   public deactivateScenario(): void {
     this.deckGLMap?.setScenarioState(null);
+    this.svgMap?.setScenarioState(null);
+    this.globeMap?.setScenarioState(null);
+    this.supplyChainPanel?.hideScenarioSummary();
   }
 
   // Utility methods
diff --git a/src/components/SupplyChainPanel.ts b/src/components/SupplyChainPanel.ts
index 0dcf0f7a7..361c435e6 100644
--- a/src/components/SupplyChainPanel.ts
+++ b/src/components/SupplyChainPanel.ts
@@ -6,6 +6,8 @@ import type {
   GetShippingStressResponse,
 } from '@/services/supply-chain';
 import { fetchBypassOptions } from '@/services/supply-chain';
+import type { ScenarioResult } from '@/config/scenario-templates';
+import { SCENARIO_TEMPLATES } from '@/config/scenario-templates';
 import { TransitChart } from '@/utils/transit-chart';
 import { t } from '@/services/i18n';
 import { escapeHtml } from '@/utils/sanitize';
@@ -14,6 +16,7 @@ import { isDesktopRuntime } from '@/services/runtime';
 import { getAuthState, subscribeAuthState } from '@/services/auth-state';
 import { hasPremiumAccess } from '@/services/panel-gating';
 import { trackGateHit } from '@/services/analytics';
+import { premiumFetch } from '@/services/premium-fetch';
 
 type TabId = 'chokepoints' | 'shipping' | 'indicators' | 'minerals' | 'stress';
 
@@ -31,6 +34,10 @@ export class SupplyChainPanel extends Panel {
   private chartMountTimer: ReturnType<typeof setTimeout> | null = null;
   private bypassUnsubscribe: (() => void) | null = null;
   private bypassGateTracked = false;
+  private onDismissScenario: (() => void) | null = null;
+  private onScenarioActivate: ((scenarioId: string, result: ScenarioResult) => void) | null = null;
+  private activeScenarioState: { scenarioId: string; result: ScenarioResult } | null = null;
+  private scenarioPollController: AbortController | null = null;
 
   constructor() {
     super({ id: 'supply-chain', title: t('panels.supplyChain'), defaultRowSpan: 2, infoTooltip: t('components.supplyChain.infoTooltip') });
@@ -181,6 +188,16 @@ export class SupplyChainPanel extends Panel {
         this.chartMountTimer = null;
       }, 220);
     }
+
+    // Re-insert scenario banner after setContent replaces inner content.
+    if (this.activeScenarioState) {
+      this.showScenarioSummary(this.activeScenarioState.scenarioId, this.activeScenarioState.result);
+    }
+
+    // Attach scenario trigger buttons for expanded chokepoint cards.
+    if (this.activeTab === 'chokepoints' && this.expandedChokepoint) {
+      this.attachScenarioTriggers();
+    }
   }
 
   private renderBypassSection(container: HTMLElement, chokepointId: string): void {
@@ -305,6 +322,20 @@ export class SupplyChainPanel extends Panel {
           ? `<div class="sc-bypass-section" data-bypass-cp="${escapeHtml(cp.id)}"><div class="sc-bypass-loading">Loading bypass options\u2026</div></div>`
           : '';
 
+        const scenarioSection = expanded ? (() => {
+          const template = SCENARIO_TEMPLATES.find(tmpl =>
+            tmpl.affectedChokepointIds.includes(cp.id) && tmpl.type !== 'tariff_shock'
+          );
+          if (!template) return '';
+          const isPro = hasPremiumAccess(getAuthState());
+          const btnClass = isPro ? 'sc-scenario-btn' : 'sc-scenario-btn sc-scenario-btn--gated';
+          return `<div class="sc-scenario-trigger" data-scenario-id="${escapeHtml(template.id)}" data-chokepoint-id="${escapeHtml(cp.id)}">
+            <button class="${btnClass}" ${!isPro ? 'data-gated="1"' : ''} aria-label="Simulate ${escapeHtml(template.name)}">
+              Simulate Closure
+            </button>
+          </div>`;
+        })() : '';
+
         return `<div class="trade-restriction-card${expanded ? ' expanded' : ''}" data-cp-id="${escapeHtml(cp.name)}" style="cursor:pointer">
           <div class="trade-restriction-header">
             <span class="trade-country">${escapeHtml(cp.name)}</span>
@@ -345,6 +376,7 @@ export class SupplyChainPanel extends Panel {
             ${actionRow}
             ${chartPlaceholder}
             ${bypassSection}
+            ${scenarioSection}
           </div>
         </div>`;
       }).join('')}
@@ -591,4 +623,91 @@ export class SupplyChainPanel extends Panel {
       </table>
     </div>`;
   }
+
+  // ─── Scenario banner ─────────────────────────────────────────────────────────
+
+  public showScenarioSummary(scenarioId: string, result: ScenarioResult): void {
+    this.activeScenarioState = { scenarioId, result };
+    this.content.querySelector('.sc-scenario-banner')?.remove();
+    const top5 = result.topImpactCountries.slice(0, 5);
+    const countriesHtml = top5.map(c =>
+      `<span class="sc-scenario-country">${escapeHtml(c.iso2)} <em>${(c.impactPct * 100).toFixed(0)}%</em></span>`
+    ).join(' \u00B7 ');
+    const banner = document.createElement('div');
+    banner.className = 'sc-scenario-banner';
+    const scenarioName = SCENARIO_TEMPLATES.find(tmpl => tmpl.id === scenarioId)?.name ?? scenarioId.replace(/-/g, ' ');
+    banner.innerHTML = `<span class="sc-scenario-icon">\u26A0</span><span class="sc-scenario-name">${escapeHtml(scenarioName)}</span><span class="sc-scenario-countries">${countriesHtml}</span><button class="sc-scenario-dismiss" aria-label="Dismiss scenario">\u00D7</button>`;
+    banner.querySelector('.sc-scenario-dismiss')!.addEventListener('click', () => this.onDismissScenario?.());
+    this.content.prepend(banner);
+  }
+
+  public hideScenarioSummary(): void {
+    this.activeScenarioState = null;
+    this.content.querySelector('.sc-scenario-banner')?.remove();
+    this.content.querySelectorAll<HTMLButtonElement>('.sc-scenario-btn').forEach(btn => {
+      btn.disabled = false;
+      btn.textContent = 'Simulate Closure';
+    });
+  }
+
+  public setOnDismissScenario(cb: () => void): void {
+    this.onDismissScenario = cb;
+  }
+
+  public setOnScenarioActivate(cb: (scenarioId: string, result: ScenarioResult) => void): void {
+    this.onScenarioActivate = cb;
+  }
+
+  private attachScenarioTriggers(): void {
+    this.content.querySelectorAll<HTMLElement>('.sc-scenario-trigger').forEach(el => {
+      el.querySelector('.sc-scenario-btn')?.addEventListener('click', async (e) => {
+        e.stopPropagation();
+        const btn = el.querySelector<HTMLButtonElement>('.sc-scenario-btn')!;
+        if (btn.dataset.gated === '1') {
+          trackGateHit('scenario-engine');
+          return;
+        }
+        this.scenarioPollController?.abort();
+        this.scenarioPollController = new AbortController();
+        const { signal } = this.scenarioPollController;
+
+        const scenarioId = el.dataset.scenarioId!;
+        btn.disabled = true;
+        btn.textContent = 'Computing\u2026';
+        try {
+          const runResp = await premiumFetch('/api/scenario/v1/run', {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({ scenarioId }),
+            signal,
+          });
+          if (!runResp.ok) throw new Error('Run failed');
+          const { jobId } = await runResp.json() as { jobId: string };
+          let result: ScenarioResult | null = null;
+          for (let i = 0; i < 30; i++) {
+            if (signal.aborted || !this.content.isConnected) return;
+            if (i > 0) await new Promise(r => setTimeout(r, 2000));
+            const statusResp = await premiumFetch(`/api/scenario/v1/status?jobId=${encodeURIComponent(jobId)}`, { signal });
+            if (!statusResp.ok) throw new Error(`Status poll failed: ${statusResp.status}`);
+            const status = await statusResp.json() as { status: string; result?: ScenarioResult };
+            if (status.status === 'done') {
+              const r = status.result;
+              if (!r || !Array.isArray(r.topImpactCountries)) throw new Error('done without valid result');
+              result = r;
+              break;
+            }
+            if (status.status === 'failed') throw new Error('Scenario failed');
+          }
+          if (!result) throw new Error('Timeout');
+          if (signal.aborted || !this.content.isConnected) return;
+          this.onScenarioActivate?.(scenarioId, result);
+          btn.textContent = 'Active';
+        } catch (err) {
+          if (err instanceof Error && err.name === 'AbortError') return;
+          btn.textContent = 'Error \u2014 retry';
+          btn.disabled = false;
+        }
+      });
+    });
+  }
 }
diff --git a/src/config/scenario-templates.ts b/src/config/scenario-templates.ts
index 48fc74ad4..6c54855a8 100644
--- a/src/config/scenario-templates.ts
+++ b/src/config/scenario-templates.ts
@@ -10,3 +10,5 @@ export type {
   ScenarioVisualState,
   ScenarioResult,
 } from '../../server/worldmonitor/supply-chain/v1/scenario-templates';
+
+export { SCENARIO_TEMPLATES } from '../../server/worldmonitor/supply-chain/v1/scenario-templates';
diff --git a/src/services/supply-chain/index.ts b/src/services/supply-chain/index.ts
index d2a5eedbd..36a97a90e 100644
--- a/src/services/supply-chain/index.ts
+++ b/src/services/supply-chain/index.ts
@@ -9,6 +9,7 @@ import {
   type GetCountryChokepointIndexResponse,
   type GetBypassOptionsResponse,
   type GetCountryCostShockResponse,
+  type GetSectorDependencyResponse,
   type ShippingIndex,
   type ChokepointInfo,
   type CriticalMineral,
@@ -28,6 +29,7 @@ export type {
   GetCountryChokepointIndexResponse,
   GetBypassOptionsResponse,
   GetCountryCostShockResponse,
+  GetSectorDependencyResponse,
   ShippingIndex,
   ChokepointInfo,
   CriticalMineral,
@@ -149,3 +151,21 @@ export async function fetchCountryCostShock(
     return empty;
   }
 }
+
+const emptySectorDependency: GetSectorDependencyResponse = {
+  iso2: '', hs2: '27', hs2Label: '', flags: [],
+  primaryExporterIso2: '', primaryExporterShare: 0,
+  primaryChokepointId: '', primaryChokepointExposure: 0,
+  hasViableBypass: false, fetchedAt: '',
+};
+
+export async function fetchSectorDependency(
+  iso2: string,
+  hs2 = '27',
+): Promise<GetSectorDependencyResponse> {
+  try {
+    return await client.getSectorDependency({ iso2, hs2 });
+  } catch {
+    return { ...emptySectorDependency, iso2, hs2 };
+  }
+}
diff --git a/src/shared/premium-paths.ts b/src/shared/premium-paths.ts
index 3133f2805..7744489da 100644
--- a/src/shared/premium-paths.ts
+++ b/src/shared/premium-paths.ts
@@ -20,4 +20,6 @@ export const PREMIUM_RPC_PATHS = new Set<string>([
   '/api/sanctions/v1/list-sanctions-pressure',
   '/api/trade/v1/list-comtrade-flows',
   '/api/trade/v1/get-tariff-trends',
+  '/api/scenario/v1/run',
+  '/api/scenario/v1/status',
 ]);
diff --git a/tests/edge-functions.test.mjs b/tests/edge-functions.test.mjs
index 426076cce..4782960cf 100644
--- a/tests/edge-functions.test.mjs
+++ b/tests/edge-functions.test.mjs
@@ -340,3 +340,103 @@ describe('Edge Function module isolation', () => {
     });
   }
 });
+
+describe('Scenario run endpoint (api/scenario/v1/run.ts)', () => {
+  const runPath = join(root, 'api', 'scenario', 'v1', 'run.ts');
+
+  it('exports edge config with runtime: edge', () => {
+    const src = readFileSync(runPath, 'utf-8');
+    assert.ok(
+      src.includes("runtime: 'edge'") || src.includes('runtime: "edge"'),
+      'run.ts: must export config with runtime: edge',
+    );
+  });
+
+  it('has a default export handler function', () => {
+    const src = readFileSync(runPath, 'utf-8');
+    assert.ok(
+      src.includes('export default') && src.includes('function handler'),
+      'run.ts: must have a default export handler function',
+    );
+  });
+
+  it('returns 405 for non-POST requests', () => {
+    const src = readFileSync(runPath, 'utf-8');
+    assert.ok(
+      src.includes('405'),
+      'run.ts: must return 405 for non-POST requests',
+    );
+    assert.ok(
+      src.includes("!== 'POST'") || src.includes('!== "POST"'),
+      'run.ts: must check for POST method and reject other methods with 405',
+    );
+  });
+
+  it('validates scenarioId is required', () => {
+    const src = readFileSync(runPath, 'utf-8');
+    assert.ok(
+      src.includes('scenarioId'),
+      'run.ts: must validate scenarioId field',
+    );
+    assert.ok(
+      src.includes('400'),
+      'run.ts: must return 400 for invalid/missing scenarioId',
+    );
+  });
+
+  it('uses per-user rate limiting', () => {
+    const src = readFileSync(runPath, 'utf-8');
+    assert.ok(
+      src.includes('rate') && src.includes('429'),
+      'run.ts: must implement rate limiting with 429 response',
+    );
+  });
+
+  it('uses AbortSignal.timeout on Redis fetch', () => {
+    const src = readFileSync(runPath, 'utf-8');
+    assert.ok(
+      src.includes('AbortSignal.timeout'),
+      'run.ts: all Redis fetches must have AbortSignal.timeout to prevent hanging edge isolates',
+    );
+  });
+});
+
+describe('Scenario status endpoint (api/scenario/v1/status.ts)', () => {
+  const statusPath = join(root, 'api', 'scenario', 'v1', 'status.ts');
+
+  it('exports edge config with runtime: edge', () => {
+    const src = readFileSync(statusPath, 'utf-8');
+    assert.ok(
+      src.includes("runtime: 'edge'") || src.includes('runtime: "edge"'),
+      'status.ts: must export config with runtime: edge',
+    );
+  });
+
+  it('returns 400 for missing or invalid jobId', () => {
+    const src = readFileSync(statusPath, 'utf-8');
+    assert.ok(
+      src.includes('400'),
+      'status.ts: must return 400 for missing or invalid jobId',
+    );
+    assert.ok(
+      src.includes('jobId'),
+      'status.ts: must validate jobId query parameter',
+    );
+  });
+
+  it('validates jobId format to guard against path traversal', () => {
+    const src = readFileSync(statusPath, 'utf-8');
+    assert.ok(
+      src.includes('JOB_ID_RE') || src.includes('/^scenario:'),
+      'status.ts: must validate jobId against a regex to prevent path traversal attacks (e.g. ../../etc/passwd)',
+    );
+  });
+
+  it('uses AbortSignal.timeout on Redis fetch', () => {
+    const src = readFileSync(statusPath, 'utf-8');
+    assert.ok(
+      src.includes('AbortSignal.timeout'),
+      'status.ts: Redis fetch must have AbortSignal.timeout to prevent hanging edge isolates',
+    );
+  });
+});
diff --git a/todos/152-complete-p1-t-shadows-i18n-import.md b/todos/152-complete-p1-t-shadows-i18n-import.md
new file mode 100644
index 000000000..90ac1f048
--- /dev/null
+++ b/todos/152-complete-p1-t-shadows-i18n-import.md
@@ -0,0 +1,48 @@
+---
+status: complete
+priority: p1
+issue_id: "152"
+tags: [code-review, quality, supply-chain]
+dependencies: []
+---
+
+# `t` Parameter Shadows i18n `t` Import in `renderChokepoints`
+
+## Problem Statement
+In `SupplyChainPanel.ts:324`, the arrow function parameter `t` inside `SCENARIO_TEMPLATES.find(t => ...)` shadows the module-level `import { t } from '@/services/i18n'` at line 12. Inside the callback, `t` refers to the template object, not the i18n function. Any translated string added inside this callback (or nearby refactor) will silently use the template object as a function, throwing at runtime.
+
+## Findings
+- **File:** `src/components/SupplyChainPanel.ts:324`
+- **Code:** `const template = SCENARIO_TEMPLATES.find(t => t.affectedChokepointIds.includes(cp.id) && t.type !== 'tariff_shock');`
+- Not a crash today — `t(...)` is not called inside the callback — but it is a maintenance trap
+- Biome may not catch this as an error (depends on shadow rules configured)
+
+## Proposed Solutions
+
+### Option A: Rename the arrow function parameter (Recommended)
+```ts
+const template = SCENARIO_TEMPLATES.find(tmpl =>
+  tmpl.affectedChokepointIds.includes(cp.id) && tmpl.type !== 'tariff_shock'
+);
+```
+**Pros:** One-line fix, obvious, eliminates shadow entirely
+**Cons:** None
+**Effort:** Small | **Risk:** None
+
+## Recommended Action
+_Apply Option A immediately — 1-line fix._
+
+## Technical Details
+- **Affected files:** `src/components/SupplyChainPanel.ts`
+- **Line:** 324
+
+## Acceptance Criteria
+- [ ] Arrow function parameter renamed from `t` to `tmpl` (or similar)
+- [ ] `npm run lint` passes with no shadow warnings
+- [ ] `npm run typecheck` passes
+
+## Work Log
+- 2026-04-10: Identified by kieran-typescript-reviewer during PR #2910 review
+
+## Resources
+- PR: #2910
diff --git a/todos/153-complete-p1-polling-no-statusresp-ok-check.md b/todos/153-complete-p1-polling-no-statusresp-ok-check.md
new file mode 100644
index 000000000..368bdebe4
--- /dev/null
+++ b/todos/153-complete-p1-polling-no-statusresp-ok-check.md
@@ -0,0 +1,56 @@
+---
+status: complete
+priority: p1
+issue_id: "153"
+tags: [code-review, quality, supply-chain, reliability]
+dependencies: []
+---
+
+# Missing `statusResp.ok` Guard in Scenario Polling Loop
+
+## Problem Statement
+In `SupplyChainPanel.ts:677`, the polling loop calls `statusResp.json()` without first checking `statusResp.ok`. A 429, 500, or network error causes `.json()` to throw or produce garbage, silently burning through all 30 iterations. The button ends up stuck on "Computing…" for 60 seconds before showing "Error — retry" with no useful signal.
+
+## Findings
+- **File:** `src/components/SupplyChainPanel.ts`, line 677
+- **Code:**
+  ```ts
+  const statusResp = await fetch(`/api/scenario/v1/status?jobId=${encodeURIComponent(jobId)}`);
+  const status = await statusResp.json() as { status: string; result?: ScenarioResult };
+  ```
+- No check on `statusResp.ok` before consuming body
+- 30 × 2s = 60s of silent failure with no feedback to the user
+
+## Proposed Solutions
+
+### Option A: Guard before `.json()` (Recommended)
+```ts
+const statusResp = await fetch(`/api/scenario/v1/status?jobId=${encodeURIComponent(jobId)}`);
+if (!statusResp.ok) throw new Error(`Status poll failed: ${statusResp.status}`);
+const status = await statusResp.json() as { status: string; result?: ScenarioResult };
+```
+**Pros:** Fails fast on server error, exits loop immediately
+**Cons:** None
+**Effort:** Small | **Risk:** None
+
+### Option B: Retry on non-fatal errors, throw on fatal
+Skip 429/503, throw on 4xx. More complex, adds ~10 lines, probably not worth it for this use case.
+**Effort:** Medium | **Risk:** Low
+
+## Recommended Action
+_Apply Option A — guard before `.json()`. One line._
+
+## Technical Details
+- **Affected files:** `src/components/SupplyChainPanel.ts`
+- **Line:** 677
+
+## Acceptance Criteria
+- [ ] `statusResp.ok` checked before calling `.json()`
+- [ ] Loop exits immediately (throws) on non-OK response
+- [ ] Button shows "Error — retry" within one polling cycle on server error
+
+## Work Log
+- 2026-04-10: Identified by kieran-typescript-reviewer during PR #2910 review
+
+## Resources
+- PR: #2910
diff --git a/todos/154-complete-p1-result-nonnull-assertion-without-guard.md b/todos/154-complete-p1-result-nonnull-assertion-without-guard.md
new file mode 100644
index 000000000..4de2fffe2
--- /dev/null
+++ b/todos/154-complete-p1-result-nonnull-assertion-without-guard.md
@@ -0,0 +1,64 @@
+---
+status: complete
+priority: p1
+issue_id: "154"
+tags: [code-review, quality, supply-chain, type-safety]
+dependencies: [153]
+---
+
+# Non-Null Assertion on Optional `result` Without Guard in Polling Loop
+
+## Problem Statement
+In `SupplyChainPanel.ts:679`, `result = status.result!` uses a non-null assertion on a field typed as optional. If the server sends `{ status: 'done' }` without `result` (version mismatch or worker bug), `undefined` is silently passed to `onScenarioActivate`, which crashes in `activateScenario` when it calls `result.topImpactCountries.map(...)`. Additionally, `impactPct * 100` in `showScenarioSummary` could produce `NaN` if the upstream type changes (prior art: `feedback_pizzint_spike_magnitude_type.md`).
+
+## Findings
+- **File:** `src/components/SupplyChainPanel.ts`, line 679
+- **Code:** `if (status.status === 'done') { result = status.result!; break; }`
+- `status.result` is typed as optional (`result?: ScenarioResult`)
+- If `status.result` is absent, `undefined` propagates to `activateScenario` → crash in `topImpactCountries.map(...)`
+- `impactPct` is numeric but upstream could change to string (see MEMORY: `feedback_pizzint_spike_magnitude_type.md`)
+
+## Proposed Solutions
+
+### Option A: Explicit guard + type narrowing (Recommended)
+```ts
+if (status.status === 'done') {
+  const r = status.result;
+  if (!r || !Array.isArray(r.topImpactCountries)) throw new Error('done without valid result');
+  result = r;
+  break;
+}
+```
+**Pros:** Explicit, catches server bugs, type-safe without `!`
+**Cons:** Slight verbosity
+**Effort:** Small | **Risk:** None
+
+### Option B: Minimal guard only
+```ts
+if (status.status === 'done') {
+  if (!status.result) throw new Error('done without result');
+  result = status.result;
+  break;
+}
+```
+Protects against `undefined` but not malformed `topImpactCountries`.
+**Effort:** Small | **Risk:** Low
+
+## Recommended Action
+_Apply Option A — adds one guard line, eliminates the `!` assertion._
+
+## Technical Details
+- **Affected files:** `src/components/SupplyChainPanel.ts`
+- **Lines:** 679
+
+## Acceptance Criteria
+- [ ] Non-null assertion `!` removed from `status.result`
+- [ ] `topImpactCountries` presence verified before use
+- [ ] `npm run typecheck` passes without `!` assertion
+
+## Work Log
+- 2026-04-10: Identified by kieran-typescript-reviewer during PR #2910 review
+
+## Resources
+- PR: #2910
+- MEMORY: `feedback_pizzint_spike_magnitude_type.md`
diff --git a/todos/155-complete-p1-scenario-callbacks-not-wired-in-panel-layout.md b/todos/155-complete-p1-scenario-callbacks-not-wired-in-panel-layout.md
new file mode 100644
index 000000000..9e046c889
--- /dev/null
+++ b/todos/155-complete-p1-scenario-callbacks-not-wired-in-panel-layout.md
@@ -0,0 +1,61 @@
+---
+status: complete
+priority: p1
+issue_id: "155"
+tags: [code-review, architecture, supply-chain, correctness]
+dependencies: []
+---
+
+# Scenario Callbacks Never Wired in `panel-layout.ts` — Feature Dead on Arrival
+
+## Problem Statement
+`SupplyChainPanel.setOnScenarioActivate()` and `setOnDismissScenario()` are declared and implemented but never called anywhere. When the user clicks "Simulate Closure" and the poll completes, `this.onScenarioActivate?.(...)` fires — but the callback is null, so no map overlays are applied. The dismiss button also does nothing. The entire scenario visual engine is non-functional in production.
+
+## Findings
+- **File:** `src/app/panel-layout.ts` — missing wiring
+- `setOnScenarioActivate` and `setOnDismissScenario` public methods exist on `SupplyChainPanel` but are never called
+- `MapContainer.setSupplyChainPanel()` also exists but is never called
+- The feature compiles and type-checks but is a silent no-op at runtime
+- Confirmed by architecture reviewer: "wiring is declared but not connected"
+
+## Proposed Solutions
+
+### Option A: Wire callbacks in `panel-layout.ts` (Recommended)
+In `src/app/panel-layout.ts`, after `SupplyChainPanel` is created:
+```ts
+supplyChainPanel.setOnScenarioActivate((id, result) => {
+  this.ctx.map?.activateScenario(id, result);
+});
+supplyChainPanel.setOnDismissScenario(() => {
+  this.ctx.map?.deactivateScenario();
+});
+```
+This follows the existing pattern for all other panel callbacks (e.g. `MonitorPanel.onChanged`).
+**Pros:** Correct architecture, no circular reference, follows established pattern
+**Cons:** Requires checking how `this.ctx.map` is typed/available in panel-layout.ts
+**Effort:** Small | **Risk:** Low
+
+### Option B: Keep `setSupplyChainPanel` on MapContainer, call it from panel-layout.ts
+Also call `mapContainer.setSupplyChainPanel(supplyChainPanel)` in panel-layout.ts. Keeps the current back-reference architecture but at least makes it functional.
+**Pros:** Minimal change to the current design
+**Cons:** Preserves the bidirectional coupling (see todo #161)
+**Effort:** Small | **Risk:** Low
+
+## Recommended Action
+_Apply Option A — wire callbacks in `panel-layout.ts`. This is the minimum fix to make the feature functional and also the architecturally correct approach (see #161 for the full coupling cleanup)._
+
+## Technical Details
+- **Affected files:** `src/app/panel-layout.ts` (wiring), `src/components/SupplyChainPanel.ts` (callbacks declared)
+- **Lines in panel-layout.ts:** find where `SupplyChainPanel` is constructed (grep: `new SupplyChainPanel`)
+
+## Acceptance Criteria
+- [ ] `setOnScenarioActivate` wired in `panel-layout.ts` → calls `mapContainer.activateScenario`
+- [ ] `setOnDismissScenario` wired in `panel-layout.ts` → calls `mapContainer.deactivateScenario`
+- [ ] Clicking "Simulate Closure" (PRO, done scenario) applies arc recolor + heat layer on DeckGL
+- [ ] Dismiss × on banner restores normal visual state
+
+## Work Log
+- 2026-04-10: Identified by architecture-strategist during PR #2910 review
+
+## Resources
+- PR: #2910
diff --git a/todos/156-complete-p2-globe-scenario-missing-stroke-color-branch.md b/todos/156-complete-p2-globe-scenario-missing-stroke-color-branch.md
new file mode 100644
index 000000000..34b0babe9
--- /dev/null
+++ b/todos/156-complete-p2-globe-scenario-missing-stroke-color-branch.md
@@ -0,0 +1,56 @@
+---
+status: complete
+priority: p2
+issue_id: "156"
+tags: [code-review, quality, supply-chain, visual]
+dependencies: []
+---
+
+# GlobeMap `polygonStrokeColor` Missing `scenario` Branch — Falls Through to Red
+
+## Problem Statement
+In `GlobeMap.ts`, `polygonStrokeColor` has no `'scenario'` case. When scenario polygons are rendered, the callback falls through to the catch-all `return '#ff4444'` (conflict red), giving affected countries a visible red border that clashes with the intended orange/amber heat tint and visually conflates scenario state with conflict data.
+
+## Findings
+- **File:** `src/components/GlobeMap.ts`
+- `polygonCapColor` and `polygonSideColor` both have `'scenario'` branches added in Sprint E
+- `polygonStrokeColor` was missed — falls through to `'#ff4444'` (conflict) or `'transparent'`
+- At runtime: scenario-affected countries appear with a red border matching conflict polygons
+- Identified during architecture review of PR #2910
+
+## Proposed Solutions
+
+### Option A: Add `scenario` branch returning transparent (Recommended)
+```ts
+// In polygonStrokeColor callback:
+if (d._kind === 'scenario') return 'transparent';
+```
+Scenario heat overlay has no border — consistent with how the DeckGL `GeoJsonLayer` has `stroked: false`.
+**Pros:** Zero visual noise, matches DeckGL behavior, 1-line fix
+**Cons:** None
+**Effort:** Small | **Risk:** None
+
+### Option B: Use a subtle amber stroke
+```ts
+if (d._kind === 'scenario') return 'rgba(220,120,40,0.4)';
+```
+Adds a faint amber outline to distinguish from other polygon types.
+**Effort:** Small | **Risk:** Low (visual choice)
+
+## Recommended Action
+_Apply Option A — transparent stroke for scenario polygons, matching DeckGL's `stroked: false`._
+
+## Technical Details
+- **Affected files:** `src/components/GlobeMap.ts`
+- **Grep:** `polygonStrokeColor` — find the callback and add the missing branch before the `conflict` case
+
+## Acceptance Criteria
+- [ ] `polygonStrokeColor` returns `'transparent'` (or no-stroke equivalent) when `d._kind === 'scenario'`
+- [ ] No red border visible on Globe scenario overlay
+- [ ] `npm run typecheck` passes
+
+## Work Log
+- 2026-04-10: Identified during /ce-review of PR #2910 (GlobeMap polygon rendering)
+
+## Resources
+- PR: #2910
diff --git a/todos/157-complete-p2-scenario-templates-server-import-boundary.md b/todos/157-complete-p2-scenario-templates-server-import-boundary.md
new file mode 100644
index 000000000..b7d6bae13
--- /dev/null
+++ b/todos/157-complete-p2-scenario-templates-server-import-boundary.md
@@ -0,0 +1,60 @@
+---
+status: complete
+priority: p2
+issue_id: "157"
+tags: [code-review, architecture, supply-chain, import-boundaries]
+dependencies: []
+---
+
+# `SCENARIO_TEMPLATES` Imported Directly from `../../server/` — Module Boundary Violation
+
+## Problem Statement
+`SupplyChainPanel.ts` imports `SCENARIO_TEMPLATES` via a relative path crossing into `server/`:
+```ts
+import { SCENARIO_TEMPLATES } from '../../server/worldmonitor/supply-chain/v1/scenario-templates';
+```
+Client components must not import from `server/` directly — the `src/` → `server/` boundary keeps server-only deps (gRPC stubs, proto codegen) out of the browser bundle. This import will silently work today but will break if any server-only module is added upstream of `scenario-templates.ts`.
+
+## Findings
+- **File:** `src/components/SupplyChainPanel.ts`
+- Direct relative import crosses `src/` → `server/` module boundary
+- `src/config/scenario-templates.ts` already re-exports the `ScenarioResult` and `ScenarioVisualState` types from this file
+- The `SCENARIO_TEMPLATES` const is not yet re-exported from `src/config/scenario-templates.ts`
+- Pattern in codebase: all other panel files import from `@/config/`, `@/services/`, or `@/components/`
+- Identified by architecture-strategist during PR #2910 review
+
+## Proposed Solutions
+
+### Option A: Re-export `SCENARIO_TEMPLATES` via `src/config/scenario-templates.ts` (Recommended)
+In `src/config/scenario-templates.ts`, add:
+```ts
+export { SCENARIO_TEMPLATES } from '../../server/worldmonitor/supply-chain/v1/scenario-templates';
+```
+Then update `SupplyChainPanel.ts`:
+```ts
+import { SCENARIO_TEMPLATES } from '@/config/scenario-templates';
+```
+**Pros:** One canonical boundary crossing point, consistent with existing type re-exports, no runtime impact
+**Cons:** Needs one extra line in config file
+**Effort:** Small | **Risk:** None
+
+### Option B: Add a `src/` copy or adapter
+Duplicate the const in `src/config/`. More files, divergence risk.
+**Effort:** Medium | **Risk:** Medium (divergence)
+
+## Recommended Action
+_Apply Option A — add one re-export to `src/config/scenario-templates.ts` and update the import in `SupplyChainPanel.ts`._
+
+## Technical Details
+- **Affected files:** `src/config/scenario-templates.ts` (add re-export), `src/components/SupplyChainPanel.ts` (update import)
+
+## Acceptance Criteria
+- [ ] `src/components/SupplyChainPanel.ts` no longer imports from `../../server/`
+- [ ] `SCENARIO_TEMPLATES` accessible via `@/config/scenario-templates`
+- [ ] `npm run typecheck` passes
+
+## Work Log
+- 2026-04-10: Identified by architecture-strategist during PR #2910 review
+
+## Resources
+- PR: #2910
diff --git a/todos/158-complete-p2-scenario-heat-layer-set-alloc-every-build.md b/todos/158-complete-p2-scenario-heat-layer-set-alloc-every-build.md
new file mode 100644
index 000000000..ec0b23fa3
--- /dev/null
+++ b/todos/158-complete-p2-scenario-heat-layer-set-alloc-every-build.md
@@ -0,0 +1,73 @@
+---
+status: complete
+priority: p2
+issue_id: "158"
+tags: [code-review, performance, supply-chain, deckgl]
+dependencies: []
+---
+
+# `createScenarioHeatLayer` Allocates New `Set` on Every `buildLayers()` Call
+
+## Problem Statement
+`DeckGLMap.createScenarioHeatLayer()` constructs `new Set(this.scenarioState.affectedIso2s)` inside the method body. `buildLayers()` is called on every frame/render cycle by DeckGL when layers need to be rebuilt. The `Set` allocation is O(n) on the number of affected ISO-2 codes and runs inside the hot DeckGL render path.
+
+## Findings
+- **File:** `src/components/DeckGLMap.ts`
+- **Code:**
+  ```ts
+  private createScenarioHeatLayer(): GeoJsonLayer | null {
+    if (!this.scenarioState?.affectedIso2s?.length || !this.countriesGeoJsonData) return null;
+    const affected = new Set(this.scenarioState.affectedIso2s);  // ← allocated every call
+    return new GeoJsonLayer({ ..., getFillColor: (feature) => { const code = ...; return affected.has(code) ? ... } });
+  }
+  ```
+- `buildLayers()` is called whenever deck viewport or layers change — potentially dozens of times per second during pan/zoom
+- The `Set` contents only change when `setScenarioState()` is called (rare)
+- Identified by performance-oracle during PR #2910 review
+
+## Proposed Solutions
+
+### Option A: Cache the Set in `setScenarioState()` (Recommended)
+```ts
+private affectedIso2Set: Set<string> = new Set();
+
+public setScenarioState(state: ScenarioVisualState | null): void {
+  this.scenarioState = state;
+  this.affectedIso2Set = new Set(state?.affectedIso2s ?? []);
+  this.rebuildLayers();
+}
+
+private createScenarioHeatLayer(): GeoJsonLayer | null {
+  if (!this.affectedIso2Set.size || !this.countriesGeoJsonData) return null;
+  return new GeoJsonLayer({ ..., getFillColor: (feature) => {
+    const code = feature.properties?.['ISO3166-1-Alpha-2'] as string | undefined;
+    return (code && this.affectedIso2Set.has(code) ? [220, 60, 40, 80] : [0, 0, 0, 0]) as [number,number,number,number];
+  }});
+}
+```
+**Pros:** Set allocated once per state change (not per render), correct `updateTriggers` still invalidates DeckGL cache
+**Cons:** Small memory overhead for the cached Set field
+**Effort:** Small | **Risk:** Low
+
+### Option B: Keep as-is with a comment
+Acceptable if `buildLayers()` is only called on state change. But DeckGL calls it more often.
+**Effort:** None | **Risk:** High (performance regression on active globe interactions)
+
+## Recommended Action
+_Apply Option A — cache the Set in `setScenarioState()`._
+
+## Technical Details
+- **Affected files:** `src/components/DeckGLMap.ts`
+- Add private `affectedIso2Set: Set<string> = new Set()` field
+- Move Set construction to `setScenarioState()`
+
+## Acceptance Criteria
+- [ ] `createScenarioHeatLayer` does not allocate a new `Set` on each call
+- [ ] `setScenarioState()` rebuilds the cached Set
+- [ ] `npm run typecheck` passes
+
+## Work Log
+- 2026-04-10: Identified by performance-oracle during PR #2910 review
+
+## Resources
+- PR: #2910
diff --git a/todos/159-pending-p2-globe-flush-polygons-scenario-precompute.md b/todos/159-pending-p2-globe-flush-polygons-scenario-precompute.md
new file mode 100644
index 000000000..e86ac27ab
--- /dev/null
+++ b/todos/159-pending-p2-globe-flush-polygons-scenario-precompute.md
@@ -0,0 +1,73 @@
+---
+status: pending
+priority: p2
+issue_id: "159"
+tags: [code-review, performance, supply-chain, globe]
+dependencies: []
+---
+
+# `flushPolygons` Iterates All 250 GeoJSON Features on Every Flush — Pre-compute Scenario Polygons
+
+## Problem Statement
+`GlobeMap.flushPolygons()` iterates over `countriesGeoJsonData.features` to build scenario `GlobePolygon` objects on every call. `flushPolygons()` is called whenever ANY polygon layer changes (CII update, conflict update, imagery toggle, storm cone render). With ~250 GeoJSON features, this is ~250 object allocations + ISO-2 Set lookups on every flush, even when the scenario state hasn't changed.
+
+## Findings
+- **File:** `src/components/GlobeMap.ts`
+- `flushPolygons()` constructs scenario polygons inline from `this.scenarioState.affectedIso2s` + `countriesGeoJsonData` on every call
+- Every other polygon layer (CII, conflict, imagery) pre-builds its polygon array before `flushPolygons()` and simply concatenates
+- `setScenarioState()` calls `flushPolygons()` but does not cache the pre-built polygon array
+- Identified by performance-oracle during PR #2910 review
+
+## Proposed Solutions
+
+### Option A: Pre-compute scenario polygons in `setScenarioState()` (Recommended)
+```ts
+private scenarioPolygons: GlobePolygon[] = [];
+
+public setScenarioState(state: ScenarioVisualState | null): void {
+  this.scenarioState = state;
+  if (!state?.affectedIso2s?.length || !this.countriesGeoJsonData) {
+    this.scenarioPolygons = [];
+  } else {
+    const affected = new Set(state.affectedIso2s);
+    this.scenarioPolygons = this.countriesGeoJsonData.features
+      .filter(f => affected.has(f.properties?.['ISO3166-1-Alpha-2'] as string))
+      .map(f => ({ ...buildGlobePolygon(f), _kind: 'scenario' as const }));
+  }
+  this.flushPolygons();
+}
+```
+Then in `flushPolygons()`:
+```ts
+const polys = [...this.ciiPolygons, ...this.conflictPolygons, ...this.scenarioPolygons, ...];
+(this.globe as any).polygonsData(polys);
+```
+**Pros:** O(1) in `flushPolygons()` for scenario layer, consistent with existing pattern for other polygon types
+**Cons:** Slightly larger memory footprint (cached array)
+**Effort:** Small | **Risk:** Low
+
+### Option B: Keep inline, add early-exit guard
+```ts
+if (!this.scenarioState?.affectedIso2s?.length) { /* skip scenario loop */ }
+```
+Reduces cost to near-zero when no scenario active, but still O(n) when active.
+**Effort:** Trivial | **Risk:** None (acceptable trade-off)
+
+## Recommended Action
+_Apply Option A if the inline loop is confirmed to run frequently (profile first). Option B is an acceptable minimal fix if profiling shows low impact._
+
+## Technical Details
+- **Affected files:** `src/components/GlobeMap.ts`
+- Add `private scenarioPolygons: GlobePolygon[] = []`
+- Move construction into `setScenarioState()`
+
+## Acceptance Criteria
+- [ ] `flushPolygons()` does not iterate GeoJSON features when scenario state is unchanged
+- [ ] `setScenarioState()` pre-builds `scenarioPolygons`
+- [ ] `npm run typecheck` passes
+
+## Work Log
+- 2026-04-10: Identified by performance-oracle during PR #2910 review
+
+## Resources
+- PR: #2910
diff --git a/todos/160-complete-p2-scenario-fetch-missing-auth-header.md b/todos/160-complete-p2-scenario-fetch-missing-auth-header.md
new file mode 100644
index 000000000..c902d82a1
--- /dev/null
+++ b/todos/160-complete-p2-scenario-fetch-missing-auth-header.md
@@ -0,0 +1,64 @@
+---
+status: complete
+priority: p2
+issue_id: "160"
+tags: [code-review, security, supply-chain, auth]
+dependencies: []
+---
+
+# Scenario Fetch Calls in `attachScenarioTriggers` Missing Auth Header
+
+## Problem Statement
+The `fetch` calls in `SupplyChainPanel.attachScenarioTriggers()` — both the initial `POST /api/scenario/v1/run` and the polling `GET /api/scenario/v1/status` — send no authentication header. The API endpoints use `validateApiKey()` which, for browser origins (trusted), silently returns `required: false` and skips key validation. This means PRO-gated endpoints are reachable unauthenticated from any browser tab that happens to have the right origin header.
+
+## Findings
+- **File:** `src/components/SupplyChainPanel.ts` — `attachScenarioTriggers()` polling loop
+- No `X-WorldMonitor-Key` or `Authorization` header on either fetch call
+- `validateApiKey(req)` with no `{ forceKey: true }` returns `{ required: false }` for browser origins (see MEMORY: `feedback_validateapikey_forcekey_vendor.md`)
+- The PRO gate is only checked client-side in `MapContainer.activateScenario()` — bypassing it server-side is trivial via curl with `Origin: https://worldmonitor.app`
+- Identified by security-sentinel during PR #2910 review
+
+## Proposed Solutions
+
+### Option A: Add auth header using `getApiKey()` (Recommended)
+```ts
+import { getApiKey } from '@/services/auth-state';
+
+// In attachScenarioTriggers():
+const headers: Record<string, string> = { 'Content-Type': 'application/json' };
+const apiKey = getApiKey();
+if (apiKey) headers['X-WorldMonitor-Key'] = apiKey;
+
+const runResp = await fetch('/api/scenario/v1/run', { method: 'POST', headers, body: JSON.stringify(payload) });
+// ...
+const statusResp = await fetch(`/api/scenario/v1/status?jobId=...`, { headers });
+```
+**Pros:** Consistent with other authenticated panel fetches, enables server-side PRO gating
+**Cons:** None
+**Effort:** Small | **Risk:** None
+
+### Option B: Add `forceKey: true` on the API endpoints + client auth header
+Also update the API endpoints to use `validateApiKey(req, { forceKey: true })` to reject unauthenticated browser requests.
+**Pros:** Defense in depth — server-side gate enforced regardless of client behavior
+**Cons:** Requires API changes too
+**Effort:** Small | **Risk:** Low
+
+## Recommended Action
+_Apply Option A immediately (client auth header). Option B should follow as a separate API hardening change._
+
+## Technical Details
+- **Affected files:** `src/components/SupplyChainPanel.ts`
+- `api/scenario/v1/run.ts` and `api/scenario/v1/status.ts` — consider `forceKey: true` follow-up
+
+## Acceptance Criteria
+- [ ] Both fetch calls in `attachScenarioTriggers` include `X-WorldMonitor-Key` header when available
+- [ ] No regression for users without an API key (header omitted gracefully)
+- [ ] `npm run typecheck` passes
+
+## Work Log
+- 2026-04-10: Identified by security-sentinel during PR #2910 review
+
+## Resources
+- PR: #2910
+- MEMORY: `feedback_validateapikey_forcekey_vendor.md`
+- MEMORY: `feedback_is_caller_premium_trusted_origin.md`
diff --git a/todos/161-pending-p2-mapcontainer-supply-chain-panel-bidirectional-coupling.md b/todos/161-pending-p2-mapcontainer-supply-chain-panel-bidirectional-coupling.md
new file mode 100644
index 000000000..a10ea2622
--- /dev/null
+++ b/todos/161-pending-p2-mapcontainer-supply-chain-panel-bidirectional-coupling.md
@@ -0,0 +1,59 @@
+---
+status: pending
+priority: p2
+issue_id: "161"
+tags: [code-review, architecture, supply-chain, coupling]
+dependencies: [155]
+---
+
+# MapContainer ↔ SupplyChainPanel Bidirectional Coupling via `setSupplyChainPanel`
+
+## Problem Statement
+`MapContainer` has a `setSupplyChainPanel(panel)` setter that stores a direct reference to `SupplyChainPanel`. This creates a bidirectional dependency: `SupplyChainPanel` calls into `MapContainer` via callbacks (correct direction), and `MapContainer` calls back into `SupplyChainPanel` via `showScenarioSummary` / `hideScenarioSummary` (reverse direction). This circular architecture makes both components harder to test and violates the unidirectional data flow established by every other panel in the system.
+
+## Findings
+- **File:** `src/components/MapContainer.ts` — `setSupplyChainPanel()` and `deactivateScenario()` calling `this.supplyChainPanel?.hideScenarioSummary()`
+- **File:** `src/components/SupplyChainPanel.ts` — `setOnDismissScenario` / `setOnScenarioActivate` callbacks point to `MapContainer`
+- All other panels (MonitorPanel, CountryDeepDivePanel, etc.) use one-way callbacks: panel → map, never map → panel
+- The bidirectional link was noted in the Sprint E plan as deferred to this issue
+- Identified by architecture-strategist during PR #2910 review (see todo #155 for the more urgent wiring issue)
+
+## Proposed Solutions
+
+### Option A: Remove `showScenarioSummary`/`hideScenarioSummary` from `MapContainer` dispatch (Recommended)
+Instead of `MapContainer` calling `panel.showScenarioSummary()` and `panel.hideScenarioSummary()`:
+- Have `SupplyChainPanel` observe scenario state changes through its existing `onScenarioActivate` and `onDismissScenario` callbacks
+- The panel already receives `(id, result)` in `onScenarioActivate` — it can call `showScenarioSummary` on itself
+- `MapContainer.activateScenario` fires `onScenarioActivate` → panel handles its own UI update
+- `MapContainer.deactivateScenario` fires `onDismissScenario` → panel handles its own dismiss
+- Remove `setSupplyChainPanel` from `MapContainer` entirely
+
+**Pros:** Breaks the circular reference, consistent with all other panels
+**Cons:** Requires refactoring how the panel receives activation events (it already does via callbacks)
+**Effort:** Medium | **Risk:** Low
+
+### Option B: Keep `setSupplyChainPanel` but document the coupling explicitly
+Add a JSDoc comment acknowledging the bidirectional dependency and track via this todo.
+**Pros:** No refactor needed now
+**Cons:** Coupling persists indefinitely, harder to unit-test
+**Effort:** Trivial | **Risk:** None (deferred tech debt)
+
+## Recommended Action
+_Apply Option A in a follow-up PR after P1 issues (#155) are fixed. The coupling is architectural debt but not a blocking bug._
+
+## Technical Details
+- **Affected files:** `src/components/MapContainer.ts`, `src/components/SupplyChainPanel.ts`
+- Dependency: Fix todo #155 first (wiring), then restructure the callback flow here
+
+## Acceptance Criteria
+- [ ] `MapContainer` has no direct reference to `SupplyChainPanel`
+- [ ] `setSupplyChainPanel()` removed from `MapContainer`
+- [ ] Panel banner updates triggered via existing `onScenarioActivate` / `onDismissScenario` callbacks
+- [ ] `npm run typecheck` passes
+
+## Work Log
+- 2026-04-10: Identified by architecture-strategist during PR #2910 review
+
+## Resources
+- PR: #2910
+- Related: todo #155 (callbacks not wired — fix first)
diff --git a/todos/162-complete-p2-attach-scenario-triggers-no-in-flight-guard.md b/todos/162-complete-p2-attach-scenario-triggers-no-in-flight-guard.md
new file mode 100644
index 000000000..858cae002
--- /dev/null
+++ b/todos/162-complete-p2-attach-scenario-triggers-no-in-flight-guard.md
@@ -0,0 +1,71 @@
+---
+status: complete
+priority: p2
+issue_id: "162"
+tags: [code-review, quality, supply-chain, reliability]
+dependencies: []
+---
+
+# `attachScenarioTriggers` Has No In-Flight Guard — Concurrent Polling Possible
+
+## Problem Statement
+`SupplyChainPanel.attachScenarioTriggers()` launches a polling loop but has no guard against being called while a previous poll is still running. If the user clicks "Simulate Closure" a second time before the first job completes (e.g., after navigating away and back to the chokepoint), two polling loops run concurrently. Both can call `onScenarioActivate`, resulting in a race between two job results applying visual state in an undefined order.
+
+## Findings
+- **File:** `src/components/SupplyChainPanel.ts`
+- `attachScenarioTriggers()` is called from the "Simulate Closure" button click handler
+- No `isPolling` flag or AbortController checked before starting a new poll
+- Existing guard: `if (!button.isConnected) break` only exits on DOM removal, not on second click
+- Two concurrent polls can overlap and call `onScenarioActivate` with different results
+- Identified by kieran-typescript-reviewer during PR #2910 review
+
+## Proposed Solutions
+
+### Option A: AbortController + in-flight flag (Recommended)
+```ts
+private scenarioPollController: AbortController | null = null;
+
+private async attachScenarioTriggers(button: HTMLButtonElement, cp: Chokepoint): Promise<void> {
+  // Cancel any in-flight poll
+  this.scenarioPollController?.abort();
+  this.scenarioPollController = new AbortController();
+  const { signal } = this.scenarioPollController;
+
+  // ... in the polling loop:
+  if (signal.aborted || !button.isConnected) break;
+  const statusResp = await fetch(`...`, { signal });
+}
+```
+**Pros:** Clean cancellation, prevents concurrent polls, mirrors standard fetch abort patterns
+**Cons:** Need to handle `AbortError` gracefully (not show error banner)
+**Effort:** Small | **Risk:** Low
+
+### Option B: Simple boolean in-flight flag
+```ts
+private isScenarioPolling = false;
+
+if (this.isScenarioPolling) return;
+this.isScenarioPolling = true;
+try { /* poll */ } finally { this.isScenarioPolling = false; }
+```
+Blocks second trigger rather than cancelling first. Simpler but less responsive (user can't restart a stalled poll).
+**Effort:** Small | **Risk:** None
+
+## Recommended Action
+_Apply Option A — AbortController for clean cancellation, matching the codebase's existing fetch patterns._
+
+## Technical Details
+- **Affected files:** `src/components/SupplyChainPanel.ts`
+- Add `private scenarioPollController: AbortController | null = null`
+- Handle `AbortError` in the catch block (do not show error banner on abort)
+
+## Acceptance Criteria
+- [ ] Second click aborts previous polling loop
+- [ ] `AbortError` not surfaced to user as "Error — retry"
+- [ ] `npm run typecheck` passes
+
+## Work Log
+- 2026-04-10: Identified by kieran-typescript-reviewer during PR #2910 review
+
+## Resources
+- PR: #2910
diff --git a/todos/163-complete-p3-scenario-banner-shows-raw-id.md b/todos/163-complete-p3-scenario-banner-shows-raw-id.md
new file mode 100644
index 000000000..cbdcc6653
--- /dev/null
+++ b/todos/163-complete-p3-scenario-banner-shows-raw-id.md
@@ -0,0 +1,45 @@
+---
+status: complete
+priority: p3
+issue_id: "163"
+tags: [code-review, quality, supply-chain, ux]
+dependencies: []
+---
+
+# Scenario Banner Shows Raw Template ID Instead of Human-Readable Name
+
+## Problem Statement
+The scenario activation banner in `SupplyChainPanel.showScenarioSummary()` displays the raw `scenarioId` string (e.g., `"suez-full-closure-2026"`) rather than the template's `.name` property (e.g., `"Suez Canal Full Closure"`). Users see a machine identifier instead of a localized, readable label.
+
+## Findings
+- **File:** `src/components/SupplyChainPanel.ts`
+- Banner HTML likely contains `${scenarioId}` where it should use `SCENARIO_TEMPLATES.find(tmpl => tmpl.id === scenarioId)?.name ?? scenarioId`
+- `SCENARIO_TEMPLATES` is already imported in the same file
+- Minor UX issue — doesn't block functionality
+- Identified during code review of PR #2910
+
+## Proposed Solutions
+
+### Option A: Look up template name with fallback
+```ts
+const templateName = SCENARIO_TEMPLATES.find(tmpl => tmpl.id === scenarioId)?.name ?? scenarioId;
+// Use templateName in banner heading
+```
+**Pros:** Shows human-readable label, graceful fallback to ID if template not found
+**Effort:** Small | **Risk:** None
+
+## Recommended Action
+_Apply Option A — 1-line lookup._
+
+## Technical Details
+- **Affected files:** `src/components/SupplyChainPanel.ts` — `showScenarioSummary()`
+
+## Acceptance Criteria
+- [ ] Banner heading shows template `.name`, not raw `scenarioId`
+- [ ] Falls back to raw ID if template not found
+
+## Work Log
+- 2026-04-10: Identified during PR #2910 review
+
+## Resources
+- PR: #2910
diff --git a/todos/164-pending-p3-fetch-sector-dependency-no-circuit-breaker.md b/todos/164-pending-p3-fetch-sector-dependency-no-circuit-breaker.md
new file mode 100644
index 000000000..c667ca751
--- /dev/null
+++ b/todos/164-pending-p3-fetch-sector-dependency-no-circuit-breaker.md
@@ -0,0 +1,59 @@
+---
+status: pending
+priority: p3
+issue_id: "164"
+tags: [code-review, quality, supply-chain, reliability]
+dependencies: []
+---
+
+# `fetchSectorDependency` Has No Circuit Breaker — Retries Indefinitely on Persistent Failure
+
+## Problem Statement
+`src/services/supply-chain/index.ts:fetchSectorDependency()` catches all errors and returns `emptySectorDependency`. While this prevents crashes, it means every call during a persistent outage (e.g., server restart, network partition) makes a live gRPC attempt before falling back. If the supply-chain panel calls this per-chokepoint on every render, a 30-chokepoint list during an outage = 30 sequential timeouts per render cycle.
+
+## Findings
+- **File:** `src/services/supply-chain/index.ts`
+- **Code:**
+  ```ts
+  export async function fetchSectorDependency(iso2, hs2 = '27') {
+    try {
+      return await client.getSectorDependency({ iso2, hs2 });
+    } catch {
+      return { ...emptySectorDependency, iso2, hs2 };
+    }
+  }
+  ```
+- No timeout, no cached failure state, no back-off
+- Minor issue today (called rarely), but will matter at scale
+- Identified by kieran-typescript-reviewer during PR #2910 review
+
+## Proposed Solutions
+
+### Option A: Add a short timeout to the gRPC call
+```ts
+const ac = new AbortController();
+setTimeout(() => ac.abort(), 3000);
+return await client.getSectorDependency({ iso2, hs2 }, { signal: ac.signal });
+```
+Fails fast, reduces hung call duration.
+**Effort:** Small | **Risk:** Low
+
+### Option B: Deduplicate in-flight requests with a request Map
+Cache the promise keyed by `${iso2}:${hs2}` — deduplicates concurrent calls for the same country.
+**Effort:** Small | **Risk:** Low
+
+## Recommended Action
+_Combine A + B: timeout + in-flight dedup. Low-effort, prevents worst-case pile-up._
+
+## Technical Details
+- **Affected files:** `src/services/supply-chain/index.ts`
+
+## Acceptance Criteria
+- [ ] `fetchSectorDependency` times out within ~3s rather than hanging indefinitely
+- [ ] Concurrent calls for the same `(iso2, hs2)` share one in-flight promise
+
+## Work Log
+- 2026-04-10: Identified by kieran-typescript-reviewer during PR #2910 review
+
+## Resources
+- PR: #2910
diff --git a/todos/165-pending-p3-scenario-rate-limiter-keys-off-ip-not-identity.md b/todos/165-pending-p3-scenario-rate-limiter-keys-off-ip-not-identity.md
new file mode 100644
index 000000000..8012a0960
--- /dev/null
+++ b/todos/165-pending-p3-scenario-rate-limiter-keys-off-ip-not-identity.md
@@ -0,0 +1,49 @@
+---
+status: pending
+priority: p3
+issue_id: "165"
+tags: [code-review, security, supply-chain, rate-limiting]
+dependencies: []
+---
+
+# Scenario Rate Limiter Keys Off IP — Shared Egress Customers Share Rate Bucket
+
+## Problem Statement
+`api/scenario/v1/run.ts` rate-limits requests by client IP. In enterprise or office environments where many users share a single egress IP (NAT, VPN), all users share one rate bucket. A single heavy user can exhaust the quota for all colleagues on the same IP. The correct key for a PRO-gated endpoint is the authenticated API key identity.
+
+## Findings
+- **File:** `api/scenario/v1/run.ts`
+- Rate limit key: likely `getClientIp(req)` (standard pattern in codebase)
+- PRO endpoints in the codebase that handle multiple users per IP should key by API key identity
+- See MEMORY: `feedback_is_caller_premium_trusted_origin.md` — the API key is extractable from `X-WorldMonitor-Key`
+- Minor issue: scenario endpoint is PRO-only, low traffic volume — not urgent
+- Identified by security-sentinel during PR #2910 review
+
+## Proposed Solutions
+
+### Option A: Key rate limit by API key when present, fall back to IP
+```ts
+const apiKey = req.headers.get('x-worldmonitor-key');
+const rateLimitKey = apiKey ? `scenario:key:${apiKey}` : `scenario:ip:${getClientIp(req)}`;
+```
+**Pros:** Per-identity limiting for authenticated users, IP fallback for unauth
+**Cons:** Unauthenticated requests still IP-keyed (acceptable)
+**Effort:** Small | **Risk:** None
+
+## Recommended Action
+_Apply Option A in a follow-up. Not blocking — scenario endpoint is PRO-only and low-traffic._
+
+## Technical Details
+- **Affected files:** `api/scenario/v1/run.ts`
+
+## Acceptance Criteria
+- [ ] Rate limit key uses `X-WorldMonitor-Key` when present
+- [ ] Falls back to IP for requests without a key
+- [ ] Existing rate limit tests pass
+
+## Work Log
+- 2026-04-10: Identified by security-sentinel during PR #2910 review
+
+## Resources
+- PR: #2910
+- MEMORY: `feedback_is_caller_premium_trusted_origin.md`