Add bridge lane health API and config-ready lane UI for Tier A Week 3.

Probe LINK balances on CCIP bridge contracts, expose proof-transfer metadata on bridge status, and render funded/unfunded lane health on /bridge with extended smoke coverage.

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/components/explorer/BridgeLaneHealthPanel.tsx

@@ -0,0 +1,107 @@
+'use client'
+
+import Link from 'next/link'
+import { Card } from '@/libs/frontend-ui-primitives'
+import EntityBadge from '@/components/common/EntityBadge'
+import type { MissionControlBridgeLane, MissionControlBridgeLaneHealth } from '@/services/api/missionControl'
+
+function laneTone(status?: string | null): 'success' | 'warning' | 'info' | 'neutral' {
+  switch (String(status || '').toLowerCase()) {
+    case 'funded':
+    case 'proof-recorded':
+      return 'success'
+    case 'degraded':
+    case 'proof-pending':
+      return 'warning'
+    case 'unfunded':
+      return 'warning'
+    default:
+      return 'neutral'
+  }
+}
+
+function formatLinkBalance(wei?: string | null): string {
+  if (!wei) return 'Unknown'
+  try {
+    const value = BigInt(wei)
+    const whole = value / 10n ** 18n
+    const fractional = (value % 10n ** 18n).toString().padStart(18, '0').slice(0, 4).replace(/0+$/, '')
+    return fractional ? `${whole}.${fractional} LINK` : `${whole} LINK`
+  } catch {
+    return wei
+  }
+}
+
+export default function BridgeLaneHealthPanel({
+  laneHealth,
+  className = '',
+}: {
+  laneHealth?: MissionControlBridgeLaneHealth | null
+  className?: string
+}) {
+  const lanes = laneHealth?.lanes || []
+  if (lanes.length === 0) return null
+
+  const normalizedClassName = className ? ` ${className}` : ''
+
+  return (
+    <Card title="Config-ready lane health" className={`mb-8${normalizedClassName}`}>
+      <p className="mb-4 text-sm text-gray-600 dark:text-gray-400">
+        LINK balances are read from each remote CCIP bridge contract. Proof-transfer status comes from operator-recorded CCIP message hashes when available.
+      </p>
+      <p className="mb-4 text-sm text-gray-600 dark:text-gray-400">
+        Operator runbook: fund LINK with{' '}
+        <code className="rounded bg-gray-100 px-1.5 py-0.5 text-xs dark:bg-gray-900">fund-ccip-bridges-with-link.sh</code>
+        {' '}· lane probe{' '}
+        <code className="rounded bg-gray-100 px-1.5 py-0.5 text-xs dark:bg-gray-900">probe-bridge-lane-link-balances.sh</code>
+        {' '}· routing reference{' '}
+        <Link href="/docs/public-api-access" className="text-primary-600 hover:underline">
+          public API access
+        </Link>
+      </p>
+      <div className="overflow-x-auto">
+        <table className="min-w-full text-sm">
+          <thead>
+            <tr className="border-b border-gray-200 text-left text-xs uppercase tracking-wide text-gray-500 dark:border-gray-700 dark:text-gray-400">
+              <th className="py-2 pr-4">Lane</th>
+              <th className="py-2 pr-4">Overall</th>
+              <th className="py-2 pr-4">Proof</th>
+              <th className="py-2 pr-4">WETH9 bridge</th>
+              <th className="py-2 pr-4">WETH10 bridge</th>
+            </tr>
+          </thead>
+          <tbody>
+            {lanes.map((lane: MissionControlBridgeLane) => (
+              <tr key={lane.key} className="border-b border-gray-100 align-top last:border-0 dark:border-gray-800">
+                <td className="py-3 pr-4">
+                  <div className="font-medium text-gray-900 dark:text-white">{lane.chain_name || lane.key}</div>
+                  <div className="mt-1 text-xs text-gray-500 dark:text-gray-400">chain {lane.chain_id ?? '?'}</div>
+                </td>
+                <td className="py-3 pr-4">
+                  <EntityBadge label={lane.status || 'unknown'} tone={laneTone(lane.status)} />
+                </td>
+                <td className="py-3 pr-4">
+                  <EntityBadge label={lane.proof_status || 'proof-pending'} tone={laneTone(lane.proof_status)} />
+                </td>
+                <td className="py-3 pr-4">
+                  <div className="font-mono text-xs text-gray-700 dark:text-gray-300">{lane.weth9?.bridge || '—'}</div>
+                  <div className="mt-1 flex flex-wrap items-center gap-2">
+                    <EntityBadge label={lane.weth9?.status || 'unknown'} tone={laneTone(lane.weth9?.status)} className="px-2 py-0.5 text-[11px]" />
+                    <span className="text-xs text-gray-600 dark:text-gray-400">{formatLinkBalance(lane.weth9?.link_balance_wei)}</span>
+                  </div>
+                </td>
+                <td className="py-3 pr-4">
+                  <div className="font-mono text-xs text-gray-700 dark:text-gray-300">{lane.weth10?.bridge || '—'}</div>
+                  <div className="mt-1 flex flex-wrap items-center gap-2">
+                    <EntityBadge label={lane.weth10?.status || 'unknown'} tone={laneTone(lane.weth10?.status)} className="px-2 py-0.5 text-[11px]" />
+                    <span className="text-xs text-gray-600 dark:text-gray-400">{formatLinkBalance(lane.weth10?.link_balance_wei)}</span>
+                  </div>
+                </td>
+              </tr>
+            ))}
+          </tbody>
+        </table>
+      </div>
+    </Card>
+  )
+}

frontend/src/components/explorer/BridgeMonitoringPage.tsx

@@ -20,6 +20,7 @@ import { resolveEffectiveFreshness } from '@/utils/explorerFreshness'
 import { bridgeRoutesApi, normalizeBridgeRouteEntries, type BridgeRoutesResponse } from '@/services/api/bridgeRoutes'
 import { createVisibilityAwarePoller } from '@/utils/visibilityRefresh'
 import { HOME_DASHBOARD_REFRESH_MS } from '@/utils/featuredTokens'
+import BridgeLaneHealthPanel from '@/components/explorer/BridgeLaneHealthPanel'
 import OperationsSurfaceNav from './OperationsSurfaceNav'
 import OperationsActionGrid from './OperationsActionGrid'
 
@@ -460,6 +461,8 @@ export default function BridgeMonitoringPage({
         ))}
       </div>
 
+      <BridgeLaneHealthPanel laneHealth={bridgeStatus?.data?.bridge_lanes} />
+
       {routeEntries.length > 0 ? (
         <Card title="CCIP route catalog" className="mb-8">
           <p className="mb-4 text-sm text-gray-600 dark:text-gray-400">

frontend/src/pages/docs/index.tsx

@@ -10,6 +10,11 @@ const docsCards = [
     href: '/docs/posture-glossary',
     description: 'First-read definitions for x402, ISO-20022, forward-canonical, cW public-network, and related explorer badges.',
   },
+  {
+    title: 'Config compatibility keys',
+    href: '/docs/posture-glossary#transportactive-config-compatibility',
+    description: 'Methodology for public /config compatibility keys (transportActive, forward-canonical) and planned v2 alias mapping.',
+  },
   {
     title: 'Public API access',
     href: '/docs/public-api-access',

frontend/src/pages/docs/posture-glossary.tsx

@@ -36,7 +36,8 @@ export default function PostureGlossaryDocsPage() {
         </Card>
 
         {postureGlossaryTerms.map((term) => (
-          <Card key={term.id} title={term.title}>
+          <div key={term.id} id={term.id === 'transport-active' ? 'transportactive-config-compatibility' : undefined}>
+            <Card title={term.title}>
             <div className="space-y-3 text-sm leading-6 text-gray-600 dark:text-gray-400">
               <p>{term.summary}</p>
               <div className="rounded-xl border border-sky-200 bg-sky-50/70 p-4 text-sky-950 dark:border-sky-900/50 dark:bg-sky-950/20 dark:text-sky-100">
@@ -52,6 +53,7 @@ export default function PostureGlossaryDocsPage() {
               ) : null}
             </div>
           </Card>
+          </div>
         ))}
 
         <Card title="Related references">

frontend/src/pages/tokens/[address].tsx

@@ -365,7 +365,9 @@ export default function TokenDetailPage() {
                 <PostureBadge label="Non-canonical indexed token" tone="warning" />
               </div>
               <p className="mt-3 text-sm leading-6 text-amber-950 dark:text-amber-100">
-                This contract is indexed by Blockscout but is not in the curated Chain 138 token registry. Prefer canonical addresses from the token index for trading, liquidity, and bridge routing.
+                This contract is indexed by Blockscout but is not in the curated Chain 138 token registry. Prefer canonical addresses from the{' '}
+                <Link href="/tokens" className="font-medium text-primary-600 hover:underline">token index</Link>
+                {' '}and the posture glossary for trading, liquidity, and bridge routing.
               </p>
             </Card>
           ) : null}

frontend/src/services/api/missionControl.ts

@@ -95,6 +95,32 @@ export interface MissionControlSubsystemStatus {
   completeness?: string | null
 }
 
+export interface MissionControlBridgeLaneContract {
+  bridge?: string
+  link_balance_wei?: string
+  status?: string
+  error?: string
+}
+
+export interface MissionControlBridgeLane {
+  key: string
+  chain_name?: string
+  chain_id?: number
+  config_ready?: boolean
+  link_token?: string
+  status?: string
+  proof_status?: string
+  weth9?: MissionControlBridgeLaneContract
+  weth10?: MissionControlBridgeLaneContract
+  rpc_endpoint?: string
+}
+
+export interface MissionControlBridgeLaneHealth {
+  updated_at?: string
+  min_link_wei?: string
+  lanes?: MissionControlBridgeLane[]
+}
+
 export interface MissionControlBridgeStatusResponse {
   data?: {
     status?: string
@@ -112,6 +138,8 @@ export interface MissionControlBridgeStatusResponse {
     chains?: Record<string, MissionControlChainStatus>
     ccip_relay?: MissionControlRelayPayload
     ccip_relays?: Record<string, MissionControlRelayPayload>
+    bridge_lanes?: MissionControlBridgeLaneHealth
+    proof_transfers?: Record<string, unknown>
   }
 }