diff --git a/brain-ui/src/components/DocsView.tsx b/brain-ui/src/components/DocsView.tsx
index 975d1b9..4f1c60c 100644
--- a/brain-ui/src/components/DocsView.tsx
+++ b/brain-ui/src/components/DocsView.tsx
@@ -1,5 +1,6 @@
 import { useState, useEffect, ReactNode } from 'react'
 import ReactMarkdown, { Components } from 'react-markdown'
+import { TierComparatif, TierSingle } from './TierDashboard'
 
 interface DocFile {
   name: string
@@ -200,21 +201,37 @@ export default function DocsView() {
 
       {/* Content */}
       <div className="flex-1 overflow-y-auto" style={{ padding: '2rem 3rem' }}>
-        {loading && (
-          <div style={{ color: '#4b5563' }} className="text-sm font-mono">
-            Chargement...
-          </div>
-        )}
-        {error && (
-          <div style={{ color: '#ef4444' }} className="text-sm font-mono">
-            {error}
-          </div>
-        )}
-        {!loading && !error && (
-          <article className="docs-markdown">
-            <ReactMarkdown components={mdComponents}>{content}</ReactMarkdown>
-          </article>
-        )}
+        {(() => {
+          // Mode live + page tier → composant React dynamique
+          if (liveMode && activeDoc === 'vue-tiers') {
+            return <article className="docs-markdown"><TierComparatif /></article>
+          }
+          if (liveMode && activeDoc.startsWith('vue-')) {
+            const tierName = activeDoc.replace('vue-', '')
+            return <article className="docs-markdown"><TierSingle tierName={tierName} /></article>
+          }
+
+          // Mode standard — markdown
+          return (
+            <>
+              {loading && (
+                <div style={{ color: '#4b5563' }} className="text-sm font-mono">
+                  Chargement...
+                </div>
+              )}
+              {error && (
+                <div style={{ color: '#ef4444' }} className="text-sm font-mono">
+                  {error}
+                </div>
+              )}
+              {!loading && !error && (
+                <article className="docs-markdown">
+                  <ReactMarkdown components={mdComponents}>{content}</ReactMarkdown>
+                </article>
+              )}
+            </>
+          )
+        })()}
       </div>
     </div>
   )
diff --git a/brain-ui/src/components/TierDashboard.tsx b/brain-ui/src/components/TierDashboard.tsx
new file mode 100644
index 0000000..f70ade9
--- /dev/null
+++ b/brain-ui/src/components/TierDashboard.tsx
@@ -0,0 +1,254 @@
+import { useState, useEffect } from 'react'
+
+const API_BASE = import.meta.env.VITE_BRAIN_API ?? ''
+
+interface TierData {
+  description: string
+  coach_level: string
+  distillation: boolean
+  agents_new: string[]
+  agents_total: string[]
+  agents_count: number
+  sessions_new: string[]
+  sessions_total: string[]
+  sessions_count: number
+}
+
+interface TiersResponse {
+  version: string
+  tiers: Record<string, TierData>
+  tier_chain: string[]
+}
+
+const TIER_COLORS: Record<string, { emoji: string; border: string; bg: string; text: string }> = {
+  free:     { emoji: '🟢', border: '#22c55e', bg: 'rgba(34,197,94,0.06)',  text: '#4ade80' },
+  featured: { emoji: '🔵', border: '#3b82f6', bg: 'rgba(59,130,246,0.06)', text: '#60a5fa' },
+  pro:      { emoji: '🟠', border: '#f59e0b', bg: 'rgba(245,158,11,0.06)', text: '#fbbf24' },
+  full:     { emoji: '🟣', border: '#a855f7', bg: 'rgba(168,85,247,0.06)', text: '#c084fc' },
+}
+
+const TIER_TITLES: Record<string, string> = {
+  free: 'Tu forkes, ca marche',
+  featured: 'Le brain te connait',
+  pro: "L'atelier complet",
+  full: 'Ton brain, tes regles',
+}
+
+const COACH_LABELS: Record<string, string> = {
+  boot: 'Observation — intervient sur risque critique uniquement',
+  full: 'Mentorat complet — bilans, objectifs, progression',
+  L2: 'Mentorat long terme — anticipe, challenge, milestones',
+}
+
+// Comparatif — vue multi-tiers
+export function TierComparatif() {
+  const [data, setData] = useState<TiersResponse | null>(null)
+  const [error, setError] = useState<string | null>(null)
+
+  useEffect(() => {
+    fetch(`${API_BASE}/brain-compose/tiers`)
+      .then(r => r.json())
+      .then(setData)
+      .catch(e => setError(e.message))
+  }, [])
+
+  if (error) return <div style={{ color: '#ef4444' }}>Erreur: {error}</div>
+  if (!data) return <div style={{ color: '#4b5563' }}>Chargement...</div>
+
+  return (
+    <div>
+      <h1>Comparatif tiers</h1>
+      <p style={{ color: '#9ca3af' }}>
+        Donnees live depuis <code>brain-compose.yml</code> v{data.version}
+      </p>
+
+      {data.tier_chain.map(tierName => {
+        const tier = data.tiers[tierName]
+        if (!tier) return null
+        const colors = TIER_COLORS[tierName]
+        return (
+          <blockquote
+            key={tierName}
+            style={{
+              borderLeft: `3px solid ${colors.border}`,
+              background: colors.bg,
+              padding: '0.75rem 1rem',
+              margin: '1rem 0',
+              borderRadius: '0 4px 4px 0',
+            }}
+          >
+            <p>
+              <strong style={{ color: colors.text }}>
+                {colors.emoji} {tierName} — {TIER_TITLES[tierName]}
+              </strong>
+            </p>
+            <p>
+              <strong style={{ color: '#f3f4f6' }}>{tier.agents_count} agents. {tier.sessions_count} sessions.</strong>
+              {tier.distillation && <span style={{ color: '#60a5fa' }}> Distillation RAG active.</span>}
+            </p>
+            <p style={{ color: '#9ca3af' }}>{tier.description}</p>
+          </blockquote>
+        )
+      })}
+
+      <h2>Detail par tier</h2>
+
+      {data.tier_chain.map(tierName => {
+        const tier = data.tiers[tierName]
+        if (!tier) return null
+        const colors = TIER_COLORS[tierName]
+        return (
+          <div key={tierName} style={{ marginBottom: '2rem' }}>
+            <h3 style={{ color: colors.text }}>{colors.emoji} {tierName}</h3>
+
+            <p><strong>Sessions</strong> ({tier.sessions_count}) :</p>
+            <p style={{ color: '#9ca3af' }}>{tier.sessions_total.join(' · ')}</p>
+
+            <p><strong>Agents</strong> ({tier.agents_count}) :</p>
+            <p style={{ color: '#9ca3af', fontSize: '0.875rem', lineHeight: '1.8' }}>
+              {tier.agents_total.join(' · ')}
+            </p>
+
+            <p>
+              <strong>Coach</strong> : {COACH_LABELS[tier.coach_level] || tier.coach_level}
+            </p>
+          </div>
+        )
+      })}
+    </div>
+  )
+}
+
+// Vue single tier
+export function TierSingle({ tierName }: { tierName: string }) {
+  const [data, setData] = useState<TiersResponse | null>(null)
+  const [error, setError] = useState<string | null>(null)
+
+  useEffect(() => {
+    fetch(`${API_BASE}/brain-compose/tiers`)
+      .then(r => r.json())
+      .then(setData)
+      .catch(e => setError(e.message))
+  }, [])
+
+  if (error) return <div style={{ color: '#ef4444' }}>Erreur: {error}</div>
+  if (!data) return <div style={{ color: '#4b5563' }}>Chargement...</div>
+
+  const tier = data.tiers[tierName]
+  if (!tier) return <div style={{ color: '#ef4444' }}>Tier "{tierName}" introuvable</div>
+
+  const colors = TIER_COLORS[tierName]
+  const chain = data.tier_chain
+  const tierIndex = chain.indexOf(tierName)
+
+  // Trouver les agents/sessions "nouveaux" par rapport au tier precedent
+  const prevTier = tierIndex > 0 ? data.tiers[chain[tierIndex - 1]] : null
+  const prevAgents = new Set(prevTier?.agents_total || [])
+  const newAgents = tier.agents_total.filter(a => !prevAgents.has(a))
+  const prevSessions = new Set(prevTier?.sessions_total || [])
+  const newSessions = tier.sessions_total.filter(s => !prevSessions.has(s))
+
+  // Tier suivant pour le "ce que tu n'as pas encore"
+  const nextTierName = tierIndex < chain.length - 1 ? chain[tierIndex + 1] : null
+  const nextTier = nextTierName ? data.tiers[nextTierName] : null
+
+  return (
+    <div>
+      <h1>{colors.emoji} {tierName} — Ce que tu as</h1>
+      <p style={{ color: '#9ca3af' }}>
+        Donnees live depuis <code>brain-compose.yml</code> v{data.version}
+      </p>
+
+      <blockquote
+        style={{
+          borderLeft: `3px solid ${colors.border}`,
+          background: colors.bg,
+          padding: '0.75rem 1rem',
+          margin: '1rem 0',
+          borderRadius: '0 4px 4px 0',
+        }}
+      >
+        <p>
+          <strong style={{ color: colors.text }}>
+            {tier.agents_count} agents. {tier.sessions_count} sessions.
+          </strong>
+          {tier.distillation && <span style={{ color: '#60a5fa' }}> Distillation RAG active.</span>}
+        </p>
+        <p style={{ color: '#9ca3af' }}>{tier.description}</p>
+      </blockquote>
+
+      <hr />
+
+      <h2>Sessions {tierIndex > 0 && newSessions.length > 0 ? `(+${newSessions.length} nouvelles)` : ''}</h2>
+      {tierIndex > 0 && newSessions.length > 0 && (
+        <>
+          <p><strong>Ajoutees a ce tier :</strong></p>
+          <ul>{newSessions.map(s => <li key={s}><code>{s}</code></li>)}</ul>
+        </>
+      )}
+      <p><strong>Toutes les sessions disponibles :</strong></p>
+      <p style={{ color: '#9ca3af' }}>{tier.sessions_total.join(' · ')}</p>
+
+      <hr />
+
+      <h2>Agents {tierIndex > 0 && newAgents.length > 0 ? `(+${newAgents.length} nouveaux)` : ''}</h2>
+      {tierIndex > 0 && newAgents.length > 0 && (
+        <>
+          <p><strong>Ajoutes a ce tier :</strong></p>
+          <p style={{ color: '#9ca3af', fontSize: '0.875rem', lineHeight: '1.8' }}>
+            {newAgents.join(' · ')}
+          </p>
+        </>
+      )}
+      <p><strong>Tous les agents disponibles ({tier.agents_count}) :</strong></p>
+      <p style={{ color: '#9ca3af', fontSize: '0.875rem', lineHeight: '1.8' }}>
+        {tier.agents_total.join(' · ')}
+      </p>
+
+      <hr />
+
+      <h2>Coach</h2>
+      <blockquote
+        style={{
+          borderLeft: `3px solid ${colors.border}`,
+          background: colors.bg,
+          padding: '0.5rem 1rem',
+          borderRadius: '0 4px 4px 0',
+        }}
+      >
+        <p><strong style={{ color: colors.text }}>{tier.coach_level}</strong> — {COACH_LABELS[tier.coach_level] || tier.coach_level}</p>
+      </blockquote>
+
+      {nextTier && nextTierName && (
+        <>
+          <hr />
+          <h2>Ce que tu n'as pas encore</h2>
+          <blockquote
+            style={{
+              borderLeft: `3px solid ${TIER_COLORS[nextTierName].border}`,
+              background: TIER_COLORS[nextTierName].bg,
+              padding: '0.5rem 1rem',
+              borderRadius: '0 4px 4px 0',
+            }}
+          >
+            <p>
+              <strong style={{ color: TIER_COLORS[nextTierName].text }}>
+                {TIER_COLORS[nextTierName].emoji} {nextTierName}
+              </strong>
+              {' '}te donne : +{nextTier.agents_count - tier.agents_count} agents, +{nextTier.sessions_count - tier.sessions_count} sessions.
+            </p>
+            <p style={{ color: '#9ca3af' }}>{nextTier.description}</p>
+          </blockquote>
+        </>
+      )}
+
+      {tierName === 'full' && (
+        <>
+          <hr />
+          <h2>Tu as tout</h2>
+          <p>C'est ton brain. Tu peux modifier n'importe quel agent, forger les tiens, restructurer le kernel. Le seul gate c'est toi.</p>
+        </>
+      )}
+    </div>
+  )
+}