From acb12adf801f260778ff30fc48e28638b0198331 Mon Sep 17 00:00:00 2001
From: Aashir Athar <iamaashirathar@gmail.com>
Date: Sat, 30 May 2026 22:59:31 +0500
Subject: [PATCH] =?UTF-8?q?feat(model-council):=20multi-model=20deliberati?=
 =?UTF-8?q?on=20=E2=80=94=20parallel=20members=20+=20chair=20synthesis=20(?=
 =?UTF-8?q?#2890)?=
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Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>
Co-authored-by: Steven Enamakel <enamakel@tinyhumans.ai>
---
 .../intelligence/ModelCouncilTab.test.tsx     | 134 ++++++
 .../intelligence/ModelCouncilTab.tsx          | 260 +++++++++++
 app/src/lib/i18n/ar.ts                        |  24 +
 app/src/lib/i18n/bn.ts                        |  24 +
 app/src/lib/i18n/de.ts                        |  24 +
 app/src/lib/i18n/en.ts                        |  24 +
 app/src/lib/i18n/es.ts                        |  24 +
 app/src/lib/i18n/fr.ts                        |  24 +
 app/src/lib/i18n/hi.ts                        |  24 +
 app/src/lib/i18n/id.ts                        |  24 +
 app/src/lib/i18n/it.ts                        |  24 +
 app/src/lib/i18n/ko.ts                        |  24 +
 app/src/lib/i18n/pl.ts                        |  24 +
 app/src/lib/i18n/pt.ts                        |  24 +
 app/src/lib/i18n/ru.ts                        |  24 +
 app/src/lib/i18n/zh-CN.ts                     |  24 +
 app/src/pages/Intelligence.tsx                |   7 +-
 app/src/services/api/modelCouncilApi.test.ts  |  98 ++++
 app/src/services/api/modelCouncilApi.ts       |  96 ++++
 .../specs/insights-dashboard.spec.ts          |   4 +
 src/core/all.rs                               |   3 +
 src/openhuman/mod.rs                          |   1 +
 src/openhuman/model_council/council.rs        | 419 ++++++++++++++++++
 src/openhuman/model_council/mod.rs            |  14 +
 src/openhuman/model_council/schemas.rs        | 238 ++++++++++
 25 files changed, 1609 insertions(+), 1 deletion(-)
 create mode 100644 app/src/components/intelligence/ModelCouncilTab.test.tsx
 create mode 100644 app/src/components/intelligence/ModelCouncilTab.tsx
 create mode 100644 app/src/services/api/modelCouncilApi.test.ts
 create mode 100644 app/src/services/api/modelCouncilApi.ts
 create mode 100644 src/openhuman/model_council/council.rs
 create mode 100644 src/openhuman/model_council/mod.rs
 create mode 100644 src/openhuman/model_council/schemas.rs

diff --git a/app/src/components/intelligence/ModelCouncilTab.test.tsx b/app/src/components/intelligence/ModelCouncilTab.test.tsx
new file mode 100644
index 000000000..9fe7442b4
--- /dev/null
+++ b/app/src/components/intelligence/ModelCouncilTab.test.tsx
@@ -0,0 +1,134 @@
+import { act, fireEvent, render, screen, waitFor } from '@testing-library/react';
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+
+import type { ModelCouncilResult } from '../../services/api/modelCouncilApi';
+import ModelCouncilTab from './ModelCouncilTab';
+
+const mockRunCouncil = vi.fn();
+vi.mock('../../services/api/modelCouncilApi', () => ({
+  modelCouncilApi: { runCouncil: (...args: unknown[]) => mockRunCouncil(...args) },
+}));
+
+const RESULT: ModelCouncilResult = {
+  question: 'What is the capital of France?',
+  members: [
+    { model: 'model-a', response: 'Paris is the capital.', error: null },
+    { model: 'model-b', response: null, error: 'rate limited' },
+  ],
+  chair_model: 'chair-model',
+  synthesis: 'Both that answered agree: Paris. One seat failed.',
+};
+
+const fillValidForm = () => {
+  fireEvent.change(screen.getByLabelText('Question'), {
+    target: { value: 'What is the capital of France?' },
+  });
+  fireEvent.change(screen.getByLabelText('Member model 1'), { target: { value: 'model-a' } });
+  fireEvent.change(screen.getByLabelText('Member model 2'), { target: { value: 'model-b' } });
+  fireEvent.change(screen.getByLabelText('Chair model'), { target: { value: 'chair-model' } });
+};
+
+describe('ModelCouncilTab', () => {
+  beforeEach(() => {
+    mockRunCouncil.mockReset();
+  });
+
+  it('renders the compose surface with two member rows by default', () => {
+    render(<ModelCouncilTab />);
+    expect(screen.getByText('Model Council')).toBeInTheDocument();
+    expect(screen.getByLabelText('Question')).toBeInTheDocument();
+    expect(screen.getByLabelText('Member model 1')).toBeInTheDocument();
+    expect(screen.getByLabelText('Member model 2')).toBeInTheDocument();
+    expect(screen.getByLabelText('Chair model')).toBeInTheDocument();
+  });
+
+  it('disables Convene until question + a member + chair are all filled', () => {
+    render(<ModelCouncilTab />);
+    const run = screen.getByRole('button', { name: 'Convene council' });
+    expect(run).toBeDisabled();
+    fireEvent.change(screen.getByLabelText('Question'), { target: { value: 'q' } });
+    expect(run).toBeDisabled();
+    fireEvent.change(screen.getByLabelText('Member model 1'), { target: { value: 'm' } });
+    expect(run).toBeDisabled();
+    fireEvent.change(screen.getByLabelText('Chair model'), { target: { value: 'c' } });
+    expect(run).not.toBeDisabled();
+  });
+
+  it('adds member rows up to the max of 5 and stops', () => {
+    render(<ModelCouncilTab />);
+    const add = screen.getByRole('button', { name: '+ Add model' });
+    fireEvent.click(add); // 3
+    fireEvent.click(add); // 4
+    fireEvent.click(add); // 5
+    expect(screen.getByLabelText('Member model 5')).toBeInTheDocument();
+    expect(add).toBeDisabled();
+    expect(screen.queryByLabelText('Member model 6')).not.toBeInTheDocument();
+  });
+
+  it('removes member rows but never below one', () => {
+    render(<ModelCouncilTab />);
+    // Two rows initially; remove one → one left, remove button then disabled.
+    fireEvent.click(screen.getByRole('button', { name: 'Remove member model 2' }));
+    expect(screen.queryByLabelText('Member model 2')).not.toBeInTheDocument();
+    expect(screen.getByRole('button', { name: 'Remove member model 1' })).toBeDisabled();
+  });
+
+  it('runs the council and renders member answers side-by-side + the synthesis', async () => {
+    mockRunCouncil.mockResolvedValueOnce(RESULT);
+    render(<ModelCouncilTab />);
+    fillValidForm();
+    await act(async () => {
+      fireEvent.click(screen.getByRole('button', { name: 'Convene council' }));
+    });
+    expect(mockRunCouncil).toHaveBeenCalledWith({
+      question: 'What is the capital of France?',
+      member_models: ['model-a', 'model-b'],
+      chair_model: 'chair-model',
+    });
+    await waitFor(() => {
+      expect(screen.getByText('Council results')).toBeInTheDocument();
+    });
+    // Member A answered; Member B failed.
+    expect(screen.getByText('Paris is the capital.')).toBeInTheDocument();
+    expect(screen.getByText('rate limited')).toBeInTheDocument();
+    expect(screen.getByText('Answered')).toBeInTheDocument();
+    expect(screen.getByText('Failed')).toBeInTheDocument();
+    // Synthesis from the chair.
+    expect(
+      screen.getByText('Both that answered agree: Paris. One seat failed.')
+    ).toBeInTheDocument();
+    expect(screen.getByText('by chair-model')).toBeInTheDocument();
+  });
+
+  it('trims whitespace and drops blank member rows before calling the API', async () => {
+    mockRunCouncil.mockResolvedValueOnce(RESULT);
+    render(<ModelCouncilTab />);
+    fireEvent.change(screen.getByLabelText('Question'), { target: { value: '  hi  ' } });
+    fireEvent.change(screen.getByLabelText('Member model 1'), { target: { value: ' model-a ' } });
+    // leave member 2 blank
+    fireEvent.change(screen.getByLabelText('Chair model'), { target: { value: ' chair ' } });
+    await act(async () => {
+      fireEvent.click(screen.getByRole('button', { name: 'Convene council' }));
+    });
+    expect(mockRunCouncil).toHaveBeenCalledWith({
+      question: 'hi',
+      member_models: ['model-a'],
+      chair_model: 'chair',
+    });
+  });
+
+  it('surfaces an error alert when the council run fails', async () => {
+    mockRunCouncil.mockRejectedValueOnce(new Error('all member models failed to respond'));
+    render(<ModelCouncilTab />);
+    fillValidForm();
+    await act(async () => {
+      fireEvent.click(screen.getByRole('button', { name: 'Convene council' }));
+    });
+    await waitFor(() => {
+      const alert = screen.getByRole('alert');
+      expect(alert.textContent).toMatch(/all member models failed to respond/);
+    });
+    // No results section on failure.
+    expect(screen.queryByText('Council results')).not.toBeInTheDocument();
+  });
+});
diff --git a/app/src/components/intelligence/ModelCouncilTab.tsx b/app/src/components/intelligence/ModelCouncilTab.tsx
new file mode 100644
index 000000000..28ba84fdb
--- /dev/null
+++ b/app/src/components/intelligence/ModelCouncilTab.tsx
@@ -0,0 +1,260 @@
+/**
+ * Model Council tab — ask one question, get independent answers from several
+ * models in parallel, then a chair model's synthesis of where they agree,
+ * disagree, and what unique insight each added.
+ *
+ * The orchestration (parallel member calls + chair synthesis) lives in the
+ * Rust core behind `openhuman.model_council_run`; this tab is the compose +
+ * compare surface. Model ids are entered as free text because the available
+ * set is provider-specific (local Ollama + any configured cloud providers)
+ * and the council accepts arbitrary ids.
+ */
+import { useCallback, useMemo, useState } from 'react';
+
+import { useT } from '../../lib/i18n/I18nContext';
+import { modelCouncilApi, type ModelCouncilResult } from '../../services/api/modelCouncilApi';
+
+/** Matches the server-side MAX_COUNCIL_MEMBERS cap. */
+const MAX_MEMBERS = 5;
+
+/** A member row carries a stable id so React keys survive mid-list removal. */
+interface MemberRow {
+  id: number;
+  value: string;
+}
+
+/** Next id = max existing + 1: unique among current rows, no ref/StrictMode hazard. */
+const nextMemberId = (rows: MemberRow[]): number =>
+  rows.reduce((max, r) => Math.max(max, r.id), -1) + 1;
+
+const ModelCouncilTab = () => {
+  const { t } = useT();
+  const [question, setQuestion] = useState('');
+  const [members, setMembers] = useState<MemberRow[]>([
+    { id: 0, value: '' },
+    { id: 1, value: '' },
+  ]);
+  const [chair, setChair] = useState('');
+  const [running, setRunning] = useState(false);
+  const [result, setResult] = useState<ModelCouncilResult | null>(null);
+  const [error, setError] = useState<string | null>(null);
+
+  const filledMembers = useMemo(
+    () => members.map(m => m.value.trim()).filter(v => v.length > 0),
+    [members]
+  );
+
+  const canRun =
+    !running && question.trim().length > 0 && filledMembers.length > 0 && chair.trim().length > 0;
+
+  const updateMember = useCallback((id: number, value: string) => {
+    setMembers(prev => prev.map(m => (m.id === id ? { ...m, value } : m)));
+  }, []);
+
+  const addMember = useCallback(() => {
+    setMembers(prev =>
+      prev.length >= MAX_MEMBERS ? prev : [...prev, { id: nextMemberId(prev), value: '' }]
+    );
+  }, []);
+
+  const removeMember = useCallback((id: number) => {
+    setMembers(prev => (prev.length <= 1 ? prev : prev.filter(m => m.id !== id)));
+  }, []);
+
+  const handleRun = useCallback(async () => {
+    if (running) return;
+    const trimmedMembers = members.map(m => m.value.trim()).filter(v => v.length > 0);
+    if (question.trim().length === 0 || trimmedMembers.length === 0 || chair.trim().length === 0) {
+      return;
+    }
+    setRunning(true);
+    setError(null);
+    setResult(null);
+    try {
+      const res = await modelCouncilApi.runCouncil({
+        question: question.trim(),
+        member_models: trimmedMembers,
+        chair_model: chair.trim(),
+      });
+      setResult(res);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : String(err));
+    } finally {
+      setRunning(false);
+    }
+  }, [running, members, question, chair]);
+
+  return (
+    <div className="space-y-4">
+      <div
+        role="note"
+        className="rounded-lg border border-primary-200 dark:border-primary-500/30 bg-primary-50 dark:bg-primary-500/10 px-3 py-2 text-xs text-stone-700 dark:text-neutral-200">
+        <p className="font-medium mb-1">{t('modelCouncil.title')}</p>
+        <p>{t('modelCouncil.intro')}</p>
+      </div>
+
+      {/* Question */}
+      <div className="space-y-1.5">
+        <label
+          htmlFor="model-council-question"
+          className="text-xs font-medium text-stone-600 dark:text-neutral-300">
+          {t('modelCouncil.questionLabel')}
+        </label>
+        <textarea
+          id="model-council-question"
+          value={question}
+          onChange={e => setQuestion(e.target.value)}
+          rows={3}
+          placeholder={t('modelCouncil.questionPlaceholder')}
+          aria-label={t('modelCouncil.questionLabel')}
+          className="w-full rounded-lg border border-stone-200 dark:border-neutral-700 bg-white dark:bg-neutral-900 px-3 py-2 text-sm text-stone-800 dark:text-neutral-100 focus:outline-none focus:ring-2 focus:ring-primary-400 resize-y"
+        />
+      </div>
+
+      {/* Member models */}
+      <div className="space-y-1.5">
+        <div className="flex items-center justify-between">
+          <span className="text-xs font-medium text-stone-600 dark:text-neutral-300">
+            {t('modelCouncil.membersLabel')}
+          </span>
+          <span className="text-[10px] text-stone-400 dark:text-neutral-500">
+            {t('modelCouncil.maxMembersNote').replace('{max}', String(MAX_MEMBERS))}
+          </span>
+        </div>
+        <ul className="space-y-1.5">
+          {members.map((member, index) => (
+            <li key={member.id} className="flex items-center gap-2">
+              <input
+                type="text"
+                value={member.value}
+                onChange={e => updateMember(member.id, e.target.value)}
+                placeholder={t('modelCouncil.memberPlaceholder')}
+                aria-label={t('modelCouncil.memberAria').replace('{n}', String(index + 1))}
+                className="flex-1 rounded-lg border border-stone-200 dark:border-neutral-700 bg-white dark:bg-neutral-900 px-3 py-1.5 text-sm font-mono text-stone-800 dark:text-neutral-100 focus:outline-none focus:ring-2 focus:ring-primary-400"
+              />
+              <button
+                type="button"
+                onClick={() => removeMember(member.id)}
+                disabled={members.length <= 1}
+                aria-label={t('modelCouncil.removeMemberAria').replace('{n}', String(index + 1))}
+                className="shrink-0 rounded-lg border border-stone-200 dark:border-neutral-700 px-2 py-1.5 text-xs text-stone-500 dark:text-neutral-400 hover:bg-stone-50 dark:hover:bg-neutral-800 disabled:opacity-40 disabled:cursor-not-allowed">
+                ✕
+              </button>
+            </li>
+          ))}
+        </ul>
+        <button
+          type="button"
+          onClick={addMember}
+          disabled={members.length >= MAX_MEMBERS}
+          className="rounded-lg border border-stone-200 dark:border-neutral-700 px-3 py-1 text-xs font-medium text-stone-700 dark:text-neutral-200 hover:bg-stone-50 dark:hover:bg-neutral-800 disabled:opacity-40 disabled:cursor-not-allowed">
+          {t('modelCouncil.addMember')}
+        </button>
+      </div>
+
+      {/* Chair model */}
+      <div className="space-y-1.5">
+        <label
+          htmlFor="model-council-chair"
+          className="text-xs font-medium text-stone-600 dark:text-neutral-300">
+          {t('modelCouncil.chairLabel')}
+        </label>
+        <input
+          id="model-council-chair"
+          type="text"
+          value={chair}
+          onChange={e => setChair(e.target.value)}
+          placeholder={t('modelCouncil.chairPlaceholder')}
+          aria-label={t('modelCouncil.chairLabel')}
+          className="w-full rounded-lg border border-stone-200 dark:border-neutral-700 bg-white dark:bg-neutral-900 px-3 py-1.5 text-sm font-mono text-stone-800 dark:text-neutral-100 focus:outline-none focus:ring-2 focus:ring-primary-400"
+        />
+        <p className="text-[10px] text-stone-400 dark:text-neutral-500">
+          {t('modelCouncil.chairHelp')}
+        </p>
+      </div>
+
+      <div className="flex items-center gap-2">
+        <button
+          type="button"
+          onClick={() => void handleRun()}
+          disabled={!canRun}
+          className="rounded-lg bg-primary-500 px-4 py-1.5 text-sm font-semibold text-white hover:bg-primary-600 disabled:opacity-50 disabled:cursor-not-allowed">
+          {running ? t('modelCouncil.running') : t('modelCouncil.run')}
+        </button>
+        {running && (
+          <span
+            role="status"
+            aria-live="polite"
+            className="text-xs text-stone-500 dark:text-neutral-400">
+            {t('modelCouncil.runningHint')}
+          </span>
+        )}
+      </div>
+
+      {error && (
+        <p role="alert" className="text-xs text-coral-700 dark:text-coral-300">
+          {t('modelCouncil.errorPrefix')} {error}
+        </p>
+      )}
+
+      {result && (
+        <section aria-labelledby="model-council-results-heading" className="space-y-3 pt-1">
+          <h3
+            id="model-council-results-heading"
+            className="text-sm font-semibold text-stone-800 dark:text-neutral-100">
+            {t('modelCouncil.resultsHeading')}
+          </h3>
+
+          {/* Member answers, side by side */}
+          <div className="grid gap-2 sm:grid-cols-2">
+            {result.members.map((member, index) => (
+              <div
+                key={`${member.model}-${index}`}
+                className="rounded-lg border border-stone-200 dark:border-neutral-800 p-3 space-y-1.5">
+                <div className="flex items-center justify-between gap-2">
+                  <span className="text-xs font-mono font-medium text-stone-700 dark:text-neutral-200 truncate">
+                    {member.model}
+                  </span>
+                  <span
+                    className={`inline-flex items-center px-1.5 py-0.5 rounded text-[9px] font-semibold uppercase tracking-wider shrink-0 ${
+                      member.error
+                        ? 'bg-coral-100 dark:bg-coral-500/20 text-coral-700 dark:text-coral-300'
+                        : 'bg-sage-100 dark:bg-sage-500/20 text-sage-700 dark:text-sage-300'
+                    }`}>
+                    {member.error
+                      ? t('modelCouncil.memberFailed')
+                      : t('modelCouncil.memberAnswered')}
+                  </span>
+                </div>
+                {member.error ? (
+                  <p className="text-xs text-coral-600 dark:text-coral-400">{member.error}</p>
+                ) : (
+                  <p className="text-xs text-stone-600 dark:text-neutral-300 whitespace-pre-wrap break-words">
+                    {member.response}
+                  </p>
+                )}
+              </div>
+            ))}
+          </div>
+
+          {/* Chair synthesis */}
+          <div className="rounded-lg border border-primary-200 dark:border-primary-500/30 bg-primary-50 dark:bg-primary-500/10 p-3 space-y-1">
+            <div className="flex items-center justify-between gap-2">
+              <h4 className="text-xs font-semibold text-stone-800 dark:text-neutral-100">
+                {t('modelCouncil.synthesisHeading')}
+              </h4>
+              <span className="text-[10px] font-mono text-stone-500 dark:text-neutral-400 truncate">
+                {t('modelCouncil.synthesisBy').replace('{model}', result.chair_model)}
+              </span>
+            </div>
+            <p className="text-sm text-stone-700 dark:text-neutral-200 whitespace-pre-wrap break-words">
+              {result.synthesis}
+            </p>
+          </div>
+        </section>
+      )}
+    </div>
+  );
+};
+
+export default ModelCouncilTab;
diff --git a/app/src/lib/i18n/ar.ts b/app/src/lib/i18n/ar.ts
index 28d9df88b..73253f4d0 100644
--- a/app/src/lib/i18n/ar.ts
+++ b/app/src/lib/i18n/ar.ts
@@ -4309,6 +4309,30 @@ const messages: TranslationMap = {
   'autocomplete.debounceMs': 'مهلة الإدخال (مللي ثانية)',
   'autocomplete.maxChars': 'أقصى عدد لأحرف السياق',
   'autocomplete.overlayTtlMs': 'مهلة الطبقة (مللي ثانية)',
+  'memory.tab.council': 'Council',
+  'modelCouncil.title': 'Model Council',
+  'modelCouncil.intro':
+    'Ask one question, get independent answers from several models in parallel, then a chair model synthesizes where they agree, where they disagree, and what each uniquely adds.',
+  'modelCouncil.questionLabel': 'Question',
+  'modelCouncil.questionPlaceholder': 'Ask the council a question…',
+  'modelCouncil.membersLabel': 'Member models',
+  'modelCouncil.maxMembersNote': 'up to {max}',
+  'modelCouncil.memberPlaceholder': 'e.g. gpt-5.2',
+  'modelCouncil.memberAria': 'Member model {n}',
+  'modelCouncil.removeMemberAria': 'Remove member model {n}',
+  'modelCouncil.addMember': '+ Add model',
+  'modelCouncil.chairLabel': 'Chair model',
+  'modelCouncil.chairPlaceholder': 'e.g. claude-opus-4-8',
+  'modelCouncil.chairHelp': 'The chair reads every member answer and writes the synthesis.',
+  'modelCouncil.run': 'Convene council',
+  'modelCouncil.running': 'Convening…',
+  'modelCouncil.runningHint': 'Querying members in parallel, then synthesizing…',
+  'modelCouncil.errorPrefix': 'Council failed:',
+  'modelCouncil.resultsHeading': 'Council results',
+  'modelCouncil.memberAnswered': 'Answered',
+  'modelCouncil.memberFailed': 'Failed',
+  'modelCouncil.synthesisHeading': 'Synthesis',
+  'modelCouncil.synthesisBy': 'by {model}',
   'graphCohesion.brokerBadge': 'وسيط',
   'graphCohesion.brokerTitle':
     'ثقب بنيوي: جيران هذا الكيان غير مترابطين فيما بينهم — وهو الرابط الوحيد بينهم.',
diff --git a/app/src/lib/i18n/bn.ts b/app/src/lib/i18n/bn.ts
index 804e7646e..045c9d138 100644
--- a/app/src/lib/i18n/bn.ts
+++ b/app/src/lib/i18n/bn.ts
@@ -4383,6 +4383,30 @@ const messages: TranslationMap = {
   'autocomplete.debounceMs': 'ডিবাউন্স (মিলিসেকেন্ড)',
   'autocomplete.maxChars': 'সর্বোচ্চ প্রসঙ্গ অক্ষর',
   'autocomplete.overlayTtlMs': 'ওভারলে টাইমআউট (মিলিসেকেন্ড)',
+  'memory.tab.council': 'Council',
+  'modelCouncil.title': 'Model Council',
+  'modelCouncil.intro':
+    'Ask one question, get independent answers from several models in parallel, then a chair model synthesizes where they agree, where they disagree, and what each uniquely adds.',
+  'modelCouncil.questionLabel': 'Question',
+  'modelCouncil.questionPlaceholder': 'Ask the council a question…',
+  'modelCouncil.membersLabel': 'Member models',
+  'modelCouncil.maxMembersNote': 'up to {max}',
+  'modelCouncil.memberPlaceholder': 'e.g. gpt-5.2',
+  'modelCouncil.memberAria': 'Member model {n}',
+  'modelCouncil.removeMemberAria': 'Remove member model {n}',
+  'modelCouncil.addMember': '+ Add model',
+  'modelCouncil.chairLabel': 'Chair model',
+  'modelCouncil.chairPlaceholder': 'e.g. claude-opus-4-8',
+  'modelCouncil.chairHelp': 'The chair reads every member answer and writes the synthesis.',
+  'modelCouncil.run': 'Convene council',
+  'modelCouncil.running': 'Convening…',
+  'modelCouncil.runningHint': 'Querying members in parallel, then synthesizing…',
+  'modelCouncil.errorPrefix': 'Council failed:',
+  'modelCouncil.resultsHeading': 'Council results',
+  'modelCouncil.memberAnswered': 'Answered',
+  'modelCouncil.memberFailed': 'Failed',
+  'modelCouncil.synthesisHeading': 'Synthesis',
+  'modelCouncil.synthesisBy': 'by {model}',
   'graphCohesion.brokerBadge': 'ব্রোকার',
   'graphCohesion.brokerTitle':
     'কাঠামোগত ছিদ্র: এই সত্তার প্রতিবেশীরা একে অপরের সাথে যুক্ত নয় — এটিই তাদের মধ্যে একমাত্র সংযোগ।',
diff --git a/app/src/lib/i18n/de.ts b/app/src/lib/i18n/de.ts
index a1528c17f..872255754 100644
--- a/app/src/lib/i18n/de.ts
+++ b/app/src/lib/i18n/de.ts
@@ -4499,6 +4499,30 @@ const messages: TranslationMap = {
   'autocomplete.debounceMs': 'Entprellung (ms)',
   'autocomplete.maxChars': 'Maximale Kontextzeichen',
   'autocomplete.overlayTtlMs': 'Overlay-Timeout (ms)',
+  'memory.tab.council': 'Council',
+  'modelCouncil.title': 'Model Council',
+  'modelCouncil.intro':
+    'Ask one question, get independent answers from several models in parallel, then a chair model synthesizes where they agree, where they disagree, and what each uniquely adds.',
+  'modelCouncil.questionLabel': 'Question',
+  'modelCouncil.questionPlaceholder': 'Ask the council a question…',
+  'modelCouncil.membersLabel': 'Member models',
+  'modelCouncil.maxMembersNote': 'up to {max}',
+  'modelCouncil.memberPlaceholder': 'e.g. gpt-5.2',
+  'modelCouncil.memberAria': 'Member model {n}',
+  'modelCouncil.removeMemberAria': 'Remove member model {n}',
+  'modelCouncil.addMember': '+ Add model',
+  'modelCouncil.chairLabel': 'Chair model',
+  'modelCouncil.chairPlaceholder': 'e.g. claude-opus-4-8',
+  'modelCouncil.chairHelp': 'The chair reads every member answer and writes the synthesis.',
+  'modelCouncil.run': 'Convene council',
+  'modelCouncil.running': 'Convening…',
+  'modelCouncil.runningHint': 'Querying members in parallel, then synthesizing…',
+  'modelCouncil.errorPrefix': 'Council failed:',
+  'modelCouncil.resultsHeading': 'Council results',
+  'modelCouncil.memberAnswered': 'Answered',
+  'modelCouncil.memberFailed': 'Failed',
+  'modelCouncil.synthesisHeading': 'Synthesis',
+  'modelCouncil.synthesisBy': 'by {model}',
   'graphCohesion.brokerBadge': 'Broker',
   'graphCohesion.brokerTitle':
     'Strukturelles Loch: Die Nachbarn dieser Entität sind nicht miteinander verbunden — sie ist die einzige Verknüpfung zwischen ihnen.',
diff --git a/app/src/lib/i18n/en.ts b/app/src/lib/i18n/en.ts
index 14c905173..d3a55d66d 100644
--- a/app/src/lib/i18n/en.ts
+++ b/app/src/lib/i18n/en.ts
@@ -307,6 +307,30 @@ const en: TranslationMap = {
   'memory.tab.timeline': 'Timeline',
   'memory.tab.cohesion': 'Cohesion',
   'memory.tab.settings': 'Settings',
+  'memory.tab.council': 'Council',
+  'modelCouncil.title': 'Model Council',
+  'modelCouncil.intro':
+    'Ask one question, get independent answers from several models in parallel, then a chair model synthesizes where they agree, where they disagree, and what each uniquely adds.',
+  'modelCouncil.questionLabel': 'Question',
+  'modelCouncil.questionPlaceholder': 'Ask the council a question…',
+  'modelCouncil.membersLabel': 'Member models',
+  'modelCouncil.maxMembersNote': 'up to {max}',
+  'modelCouncil.memberPlaceholder': 'e.g. gpt-5.2',
+  'modelCouncil.memberAria': 'Member model {n}',
+  'modelCouncil.removeMemberAria': 'Remove member model {n}',
+  'modelCouncil.addMember': '+ Add model',
+  'modelCouncil.chairLabel': 'Chair model',
+  'modelCouncil.chairPlaceholder': 'e.g. claude-opus-4-8',
+  'modelCouncil.chairHelp': 'The chair reads every member answer and writes the synthesis.',
+  'modelCouncil.run': 'Convene council',
+  'modelCouncil.running': 'Convening…',
+  'modelCouncil.runningHint': 'Querying members in parallel, then synthesizing…',
+  'modelCouncil.errorPrefix': 'Council failed:',
+  'modelCouncil.resultsHeading': 'Council results',
+  'modelCouncil.memberAnswered': 'Answered',
+  'modelCouncil.memberFailed': 'Failed',
+  'modelCouncil.synthesisHeading': 'Synthesis',
+  'modelCouncil.synthesisBy': 'by {model}',
   'memory.analyzeNow': 'Analyze Now',
   'namespaceOverview.title': 'Namespace Overview',
   'namespaceOverview.intro':
diff --git a/app/src/lib/i18n/es.ts b/app/src/lib/i18n/es.ts
index 4f74f1278..ef87e7c28 100644
--- a/app/src/lib/i18n/es.ts
+++ b/app/src/lib/i18n/es.ts
@@ -4469,6 +4469,30 @@ const messages: TranslationMap = {
   'autocomplete.debounceMs': 'Retardo (ms)',
   'autocomplete.maxChars': 'Máximo de caracteres de contexto',
   'autocomplete.overlayTtlMs': 'Tiempo de espera de superposición (ms)',
+  'memory.tab.council': 'Council',
+  'modelCouncil.title': 'Model Council',
+  'modelCouncil.intro':
+    'Ask one question, get independent answers from several models in parallel, then a chair model synthesizes where they agree, where they disagree, and what each uniquely adds.',
+  'modelCouncil.questionLabel': 'Question',
+  'modelCouncil.questionPlaceholder': 'Ask the council a question…',
+  'modelCouncil.membersLabel': 'Member models',
+  'modelCouncil.maxMembersNote': 'up to {max}',
+  'modelCouncil.memberPlaceholder': 'e.g. gpt-5.2',
+  'modelCouncil.memberAria': 'Member model {n}',
+  'modelCouncil.removeMemberAria': 'Remove member model {n}',
+  'modelCouncil.addMember': '+ Add model',
+  'modelCouncil.chairLabel': 'Chair model',
+  'modelCouncil.chairPlaceholder': 'e.g. claude-opus-4-8',
+  'modelCouncil.chairHelp': 'The chair reads every member answer and writes the synthesis.',
+  'modelCouncil.run': 'Convene council',
+  'modelCouncil.running': 'Convening…',
+  'modelCouncil.runningHint': 'Querying members in parallel, then synthesizing…',
+  'modelCouncil.errorPrefix': 'Council failed:',
+  'modelCouncil.resultsHeading': 'Council results',
+  'modelCouncil.memberAnswered': 'Answered',
+  'modelCouncil.memberFailed': 'Failed',
+  'modelCouncil.synthesisHeading': 'Synthesis',
+  'modelCouncil.synthesisBy': 'by {model}',
   'graphCohesion.brokerBadge': 'intermediario',
   'graphCohesion.brokerTitle':
     'Hueco estructural: los vecinos de esta entidad no están conectados entre sí — ella es el único enlace entre ellos.',
diff --git a/app/src/lib/i18n/fr.ts b/app/src/lib/i18n/fr.ts
index fe1704053..603dffd93 100644
--- a/app/src/lib/i18n/fr.ts
+++ b/app/src/lib/i18n/fr.ts
@@ -4485,6 +4485,30 @@ const messages: TranslationMap = {
   'autocomplete.debounceMs': 'Anti-rebond (ms)',
   'autocomplete.maxChars': 'Caractères de contexte maximum',
   'autocomplete.overlayTtlMs': "Délai d'affichage (ms)",
+  'memory.tab.council': 'Council',
+  'modelCouncil.title': 'Model Council',
+  'modelCouncil.intro':
+    'Ask one question, get independent answers from several models in parallel, then a chair model synthesizes where they agree, where they disagree, and what each uniquely adds.',
+  'modelCouncil.questionLabel': 'Question',
+  'modelCouncil.questionPlaceholder': 'Ask the council a question…',
+  'modelCouncil.membersLabel': 'Member models',
+  'modelCouncil.maxMembersNote': 'up to {max}',
+  'modelCouncil.memberPlaceholder': 'e.g. gpt-5.2',
+  'modelCouncil.memberAria': 'Member model {n}',
+  'modelCouncil.removeMemberAria': 'Remove member model {n}',
+  'modelCouncil.addMember': '+ Add model',
+  'modelCouncil.chairLabel': 'Chair model',
+  'modelCouncil.chairPlaceholder': 'e.g. claude-opus-4-8',
+  'modelCouncil.chairHelp': 'The chair reads every member answer and writes the synthesis.',
+  'modelCouncil.run': 'Convene council',
+  'modelCouncil.running': 'Convening…',
+  'modelCouncil.runningHint': 'Querying members in parallel, then synthesizing…',
+  'modelCouncil.errorPrefix': 'Council failed:',
+  'modelCouncil.resultsHeading': 'Council results',
+  'modelCouncil.memberAnswered': 'Answered',
+  'modelCouncil.memberFailed': 'Failed',
+  'modelCouncil.synthesisHeading': 'Synthesis',
+  'modelCouncil.synthesisBy': 'by {model}',
   'graphCohesion.brokerBadge': 'courtier',
   'graphCohesion.brokerTitle':
     'Trou structurel : les voisins de cette entité ne sont pas connectés entre eux — elle est le seul lien entre eux.',
diff --git a/app/src/lib/i18n/hi.ts b/app/src/lib/i18n/hi.ts
index e1ad6294e..60b8a17cb 100644
--- a/app/src/lib/i18n/hi.ts
+++ b/app/src/lib/i18n/hi.ts
@@ -4391,6 +4391,30 @@ const messages: TranslationMap = {
   'autocomplete.debounceMs': 'डिबाउंस (ms)',
   'autocomplete.maxChars': 'अधिकतम संदर्भ वर्ण',
   'autocomplete.overlayTtlMs': 'ओवरले समय-समाप्ति (ms)',
+  'memory.tab.council': 'Council',
+  'modelCouncil.title': 'Model Council',
+  'modelCouncil.intro':
+    'Ask one question, get independent answers from several models in parallel, then a chair model synthesizes where they agree, where they disagree, and what each uniquely adds.',
+  'modelCouncil.questionLabel': 'Question',
+  'modelCouncil.questionPlaceholder': 'Ask the council a question…',
+  'modelCouncil.membersLabel': 'Member models',
+  'modelCouncil.maxMembersNote': 'up to {max}',
+  'modelCouncil.memberPlaceholder': 'e.g. gpt-5.2',
+  'modelCouncil.memberAria': 'Member model {n}',
+  'modelCouncil.removeMemberAria': 'Remove member model {n}',
+  'modelCouncil.addMember': '+ Add model',
+  'modelCouncil.chairLabel': 'Chair model',
+  'modelCouncil.chairPlaceholder': 'e.g. claude-opus-4-8',
+  'modelCouncil.chairHelp': 'The chair reads every member answer and writes the synthesis.',
+  'modelCouncil.run': 'Convene council',
+  'modelCouncil.running': 'Convening…',
+  'modelCouncil.runningHint': 'Querying members in parallel, then synthesizing…',
+  'modelCouncil.errorPrefix': 'Council failed:',
+  'modelCouncil.resultsHeading': 'Council results',
+  'modelCouncil.memberAnswered': 'Answered',
+  'modelCouncil.memberFailed': 'Failed',
+  'modelCouncil.synthesisHeading': 'Synthesis',
+  'modelCouncil.synthesisBy': 'by {model}',
   'graphCohesion.brokerBadge': 'ब्रोकर',
   'graphCohesion.brokerTitle':
     'संरचनात्मक छेद: इस इकाई के पड़ोसी आपस में नहीं जुड़े — यह उनके बीच एकमात्र कड़ी है।',
diff --git a/app/src/lib/i18n/id.ts b/app/src/lib/i18n/id.ts
index 946d14bf2..eb452dcd1 100644
--- a/app/src/lib/i18n/id.ts
+++ b/app/src/lib/i18n/id.ts
@@ -4400,6 +4400,30 @@ const messages: TranslationMap = {
   'autocomplete.debounceMs': 'Debounce (md)',
   'autocomplete.maxChars': 'Karakter konteks maks',
   'autocomplete.overlayTtlMs': 'Batas waktu overlay (md)',
+  'memory.tab.council': 'Council',
+  'modelCouncil.title': 'Model Council',
+  'modelCouncil.intro':
+    'Ask one question, get independent answers from several models in parallel, then a chair model synthesizes where they agree, where they disagree, and what each uniquely adds.',
+  'modelCouncil.questionLabel': 'Question',
+  'modelCouncil.questionPlaceholder': 'Ask the council a question…',
+  'modelCouncil.membersLabel': 'Member models',
+  'modelCouncil.maxMembersNote': 'up to {max}',
+  'modelCouncil.memberPlaceholder': 'e.g. gpt-5.2',
+  'modelCouncil.memberAria': 'Member model {n}',
+  'modelCouncil.removeMemberAria': 'Remove member model {n}',
+  'modelCouncil.addMember': '+ Add model',
+  'modelCouncil.chairLabel': 'Chair model',
+  'modelCouncil.chairPlaceholder': 'e.g. claude-opus-4-8',
+  'modelCouncil.chairHelp': 'The chair reads every member answer and writes the synthesis.',
+  'modelCouncil.run': 'Convene council',
+  'modelCouncil.running': 'Convening…',
+  'modelCouncil.runningHint': 'Querying members in parallel, then synthesizing…',
+  'modelCouncil.errorPrefix': 'Council failed:',
+  'modelCouncil.resultsHeading': 'Council results',
+  'modelCouncil.memberAnswered': 'Answered',
+  'modelCouncil.memberFailed': 'Failed',
+  'modelCouncil.synthesisHeading': 'Synthesis',
+  'modelCouncil.synthesisBy': 'by {model}',
   'graphCohesion.brokerBadge': 'broker',
   'graphCohesion.brokerTitle':
     'Lubang struktural: tetangga entitas ini tidak saling terhubung — entitas inilah satu-satunya tautan di antara mereka.',
diff --git a/app/src/lib/i18n/it.ts b/app/src/lib/i18n/it.ts
index a4802da2f..eb0461bfb 100644
--- a/app/src/lib/i18n/it.ts
+++ b/app/src/lib/i18n/it.ts
@@ -4461,6 +4461,30 @@ const messages: TranslationMap = {
   'autocomplete.debounceMs': 'Debounce (ms)',
   'autocomplete.maxChars': 'Caratteri massimi di contesto',
   'autocomplete.overlayTtlMs': 'Timeout overlay (ms)',
+  'memory.tab.council': 'Council',
+  'modelCouncil.title': 'Model Council',
+  'modelCouncil.intro':
+    'Ask one question, get independent answers from several models in parallel, then a chair model synthesizes where they agree, where they disagree, and what each uniquely adds.',
+  'modelCouncil.questionLabel': 'Question',
+  'modelCouncil.questionPlaceholder': 'Ask the council a question…',
+  'modelCouncil.membersLabel': 'Member models',
+  'modelCouncil.maxMembersNote': 'up to {max}',
+  'modelCouncil.memberPlaceholder': 'e.g. gpt-5.2',
+  'modelCouncil.memberAria': 'Member model {n}',
+  'modelCouncil.removeMemberAria': 'Remove member model {n}',
+  'modelCouncil.addMember': '+ Add model',
+  'modelCouncil.chairLabel': 'Chair model',
+  'modelCouncil.chairPlaceholder': 'e.g. claude-opus-4-8',
+  'modelCouncil.chairHelp': 'The chair reads every member answer and writes the synthesis.',
+  'modelCouncil.run': 'Convene council',
+  'modelCouncil.running': 'Convening…',
+  'modelCouncil.runningHint': 'Querying members in parallel, then synthesizing…',
+  'modelCouncil.errorPrefix': 'Council failed:',
+  'modelCouncil.resultsHeading': 'Council results',
+  'modelCouncil.memberAnswered': 'Answered',
+  'modelCouncil.memberFailed': 'Failed',
+  'modelCouncil.synthesisHeading': 'Synthesis',
+  'modelCouncil.synthesisBy': 'by {model}',
   'graphCohesion.brokerBadge': 'broker',
   'graphCohesion.brokerTitle':
     "Buco strutturale: i vicini di questa entità non sono collegati tra loro — essa è l'unico collegamento tra loro.",
diff --git a/app/src/lib/i18n/ko.ts b/app/src/lib/i18n/ko.ts
index 4a225fb71..b419f9f98 100644
--- a/app/src/lib/i18n/ko.ts
+++ b/app/src/lib/i18n/ko.ts
@@ -4350,6 +4350,30 @@ const messages: TranslationMap = {
   'autocomplete.debounceMs': '디바운스 (ms)',
   'autocomplete.maxChars': '최대 컨텍스트 문자 수',
   'autocomplete.overlayTtlMs': '오버레이 시간 초과 (ms)',
+  'memory.tab.council': 'Council',
+  'modelCouncil.title': 'Model Council',
+  'modelCouncil.intro':
+    'Ask one question, get independent answers from several models in parallel, then a chair model synthesizes where they agree, where they disagree, and what each uniquely adds.',
+  'modelCouncil.questionLabel': 'Question',
+  'modelCouncil.questionPlaceholder': 'Ask the council a question…',
+  'modelCouncil.membersLabel': 'Member models',
+  'modelCouncil.maxMembersNote': 'up to {max}',
+  'modelCouncil.memberPlaceholder': 'e.g. gpt-5.2',
+  'modelCouncil.memberAria': 'Member model {n}',
+  'modelCouncil.removeMemberAria': 'Remove member model {n}',
+  'modelCouncil.addMember': '+ Add model',
+  'modelCouncil.chairLabel': 'Chair model',
+  'modelCouncil.chairPlaceholder': 'e.g. claude-opus-4-8',
+  'modelCouncil.chairHelp': 'The chair reads every member answer and writes the synthesis.',
+  'modelCouncil.run': 'Convene council',
+  'modelCouncil.running': 'Convening…',
+  'modelCouncil.runningHint': 'Querying members in parallel, then synthesizing…',
+  'modelCouncil.errorPrefix': 'Council failed:',
+  'modelCouncil.resultsHeading': 'Council results',
+  'modelCouncil.memberAnswered': 'Answered',
+  'modelCouncil.memberFailed': 'Failed',
+  'modelCouncil.synthesisHeading': 'Synthesis',
+  'modelCouncil.synthesisBy': 'by {model}',
   'graphCohesion.brokerBadge': '브로커',
   'graphCohesion.brokerTitle':
     '구조적 공백: 이 엔티티의 이웃들은 서로 연결되어 있지 않습니다 — 이들 사이의 유일한 연결고리입니다.',
diff --git a/app/src/lib/i18n/pl.ts b/app/src/lib/i18n/pl.ts
index 7232f2219..37e949170 100644
--- a/app/src/lib/i18n/pl.ts
+++ b/app/src/lib/i18n/pl.ts
@@ -4458,6 +4458,30 @@ const messages: TranslationMap = {
   'autocomplete.debounceMs': 'Opóźnienie (ms)',
   'autocomplete.maxChars': 'Maksymalna liczba znaków kontekstu',
   'autocomplete.overlayTtlMs': 'Limit czasu nakładki (ms)',
+  'memory.tab.council': 'Council',
+  'modelCouncil.title': 'Model Council',
+  'modelCouncil.intro':
+    'Ask one question, get independent answers from several models in parallel, then a chair model synthesizes where they agree, where they disagree, and what each uniquely adds.',
+  'modelCouncil.questionLabel': 'Question',
+  'modelCouncil.questionPlaceholder': 'Ask the council a question…',
+  'modelCouncil.membersLabel': 'Member models',
+  'modelCouncil.maxMembersNote': 'up to {max}',
+  'modelCouncil.memberPlaceholder': 'e.g. gpt-5.2',
+  'modelCouncil.memberAria': 'Member model {n}',
+  'modelCouncil.removeMemberAria': 'Remove member model {n}',
+  'modelCouncil.addMember': '+ Add model',
+  'modelCouncil.chairLabel': 'Chair model',
+  'modelCouncil.chairPlaceholder': 'e.g. claude-opus-4-8',
+  'modelCouncil.chairHelp': 'The chair reads every member answer and writes the synthesis.',
+  'modelCouncil.run': 'Convene council',
+  'modelCouncil.running': 'Convening…',
+  'modelCouncil.runningHint': 'Querying members in parallel, then synthesizing…',
+  'modelCouncil.errorPrefix': 'Council failed:',
+  'modelCouncil.resultsHeading': 'Council results',
+  'modelCouncil.memberAnswered': 'Answered',
+  'modelCouncil.memberFailed': 'Failed',
+  'modelCouncil.synthesisHeading': 'Synthesis',
+  'modelCouncil.synthesisBy': 'by {model}',
   'graphCohesion.brokerBadge': 'broker',
   'graphCohesion.brokerTitle':
     'Dziura strukturalna: sąsiedzi tej encji nie są ze sobą połączeni — jest ona jedynym łącznikiem między nimi.',
diff --git a/app/src/lib/i18n/pt.ts b/app/src/lib/i18n/pt.ts
index 9c46e58c2..0ccee728d 100644
--- a/app/src/lib/i18n/pt.ts
+++ b/app/src/lib/i18n/pt.ts
@@ -4457,6 +4457,30 @@ const messages: TranslationMap = {
   'autocomplete.debounceMs': 'Atraso (ms)',
   'autocomplete.maxChars': 'Máximo de caracteres de contexto',
   'autocomplete.overlayTtlMs': 'Tempo limite da sobreposição (ms)',
+  'memory.tab.council': 'Council',
+  'modelCouncil.title': 'Model Council',
+  'modelCouncil.intro':
+    'Ask one question, get independent answers from several models in parallel, then a chair model synthesizes where they agree, where they disagree, and what each uniquely adds.',
+  'modelCouncil.questionLabel': 'Question',
+  'modelCouncil.questionPlaceholder': 'Ask the council a question…',
+  'modelCouncil.membersLabel': 'Member models',
+  'modelCouncil.maxMembersNote': 'up to {max}',
+  'modelCouncil.memberPlaceholder': 'e.g. gpt-5.2',
+  'modelCouncil.memberAria': 'Member model {n}',
+  'modelCouncil.removeMemberAria': 'Remove member model {n}',
+  'modelCouncil.addMember': '+ Add model',
+  'modelCouncil.chairLabel': 'Chair model',
+  'modelCouncil.chairPlaceholder': 'e.g. claude-opus-4-8',
+  'modelCouncil.chairHelp': 'The chair reads every member answer and writes the synthesis.',
+  'modelCouncil.run': 'Convene council',
+  'modelCouncil.running': 'Convening…',
+  'modelCouncil.runningHint': 'Querying members in parallel, then synthesizing…',
+  'modelCouncil.errorPrefix': 'Council failed:',
+  'modelCouncil.resultsHeading': 'Council results',
+  'modelCouncil.memberAnswered': 'Answered',
+  'modelCouncil.memberFailed': 'Failed',
+  'modelCouncil.synthesisHeading': 'Synthesis',
+  'modelCouncil.synthesisBy': 'by {model}',
   'graphCohesion.brokerBadge': 'intermediador',
   'graphCohesion.brokerTitle':
     'Buraco estrutural: os vizinhos desta entidade não estão conectados entre si — ela é a única ligação entre eles.',
diff --git a/app/src/lib/i18n/ru.ts b/app/src/lib/i18n/ru.ts
index dbdb891c2..355ea7ee3 100644
--- a/app/src/lib/i18n/ru.ts
+++ b/app/src/lib/i18n/ru.ts
@@ -4427,6 +4427,30 @@ const messages: TranslationMap = {
   'autocomplete.debounceMs': 'Задержка (мс)',
   'autocomplete.maxChars': 'Макс. символов контекста',
   'autocomplete.overlayTtlMs': 'Тайм-аут наложения (мс)',
+  'memory.tab.council': 'Council',
+  'modelCouncil.title': 'Model Council',
+  'modelCouncil.intro':
+    'Ask one question, get independent answers from several models in parallel, then a chair model synthesizes where they agree, where they disagree, and what each uniquely adds.',
+  'modelCouncil.questionLabel': 'Question',
+  'modelCouncil.questionPlaceholder': 'Ask the council a question…',
+  'modelCouncil.membersLabel': 'Member models',
+  'modelCouncil.maxMembersNote': 'up to {max}',
+  'modelCouncil.memberPlaceholder': 'e.g. gpt-5.2',
+  'modelCouncil.memberAria': 'Member model {n}',
+  'modelCouncil.removeMemberAria': 'Remove member model {n}',
+  'modelCouncil.addMember': '+ Add model',
+  'modelCouncil.chairLabel': 'Chair model',
+  'modelCouncil.chairPlaceholder': 'e.g. claude-opus-4-8',
+  'modelCouncil.chairHelp': 'The chair reads every member answer and writes the synthesis.',
+  'modelCouncil.run': 'Convene council',
+  'modelCouncil.running': 'Convening…',
+  'modelCouncil.runningHint': 'Querying members in parallel, then synthesizing…',
+  'modelCouncil.errorPrefix': 'Council failed:',
+  'modelCouncil.resultsHeading': 'Council results',
+  'modelCouncil.memberAnswered': 'Answered',
+  'modelCouncil.memberFailed': 'Failed',
+  'modelCouncil.synthesisHeading': 'Synthesis',
+  'modelCouncil.synthesisBy': 'by {model}',
   'graphCohesion.brokerBadge': 'брокер',
   'graphCohesion.brokerTitle':
     'Структурная дыра: соседи этой сущности не связаны друг с другом — она единственная связь между ними.',
diff --git a/app/src/lib/i18n/zh-CN.ts b/app/src/lib/i18n/zh-CN.ts
index 081809c82..a1cbc6a97 100644
--- a/app/src/lib/i18n/zh-CN.ts
+++ b/app/src/lib/i18n/zh-CN.ts
@@ -4175,6 +4175,30 @@ const messages: TranslationMap = {
   'autocomplete.debounceMs': '防抖 (毫秒)',
   'autocomplete.maxChars': '最大上下文字符数',
   'autocomplete.overlayTtlMs': '覆盖层超时 (ms)',
+  'memory.tab.council': 'Council',
+  'modelCouncil.title': 'Model Council',
+  'modelCouncil.intro':
+    'Ask one question, get independent answers from several models in parallel, then a chair model synthesizes where they agree, where they disagree, and what each uniquely adds.',
+  'modelCouncil.questionLabel': 'Question',
+  'modelCouncil.questionPlaceholder': 'Ask the council a question…',
+  'modelCouncil.membersLabel': 'Member models',
+  'modelCouncil.maxMembersNote': 'up to {max}',
+  'modelCouncil.memberPlaceholder': 'e.g. gpt-5.2',
+  'modelCouncil.memberAria': 'Member model {n}',
+  'modelCouncil.removeMemberAria': 'Remove member model {n}',
+  'modelCouncil.addMember': '+ Add model',
+  'modelCouncil.chairLabel': 'Chair model',
+  'modelCouncil.chairPlaceholder': 'e.g. claude-opus-4-8',
+  'modelCouncil.chairHelp': 'The chair reads every member answer and writes the synthesis.',
+  'modelCouncil.run': 'Convene council',
+  'modelCouncil.running': 'Convening…',
+  'modelCouncil.runningHint': 'Querying members in parallel, then synthesizing…',
+  'modelCouncil.errorPrefix': 'Council failed:',
+  'modelCouncil.resultsHeading': 'Council results',
+  'modelCouncil.memberAnswered': 'Answered',
+  'modelCouncil.memberFailed': 'Failed',
+  'modelCouncil.synthesisHeading': 'Synthesis',
+  'modelCouncil.synthesisBy': 'by {model}',
   'graphCohesion.brokerBadge': '经纪者',
   'graphCohesion.brokerTitle': '结构洞:该实体的邻居彼此之间没有连接——它是它们之间唯一的链接。',
   'graphCohesion.colCohesion': '凝聚度',
diff --git a/app/src/pages/Intelligence.tsx b/app/src/pages/Intelligence.tsx
index 7d2410a3c..923564621 100644
--- a/app/src/pages/Intelligence.tsx
+++ b/app/src/pages/Intelligence.tsx
@@ -11,6 +11,7 @@ import IntelligenceTasksTab from '../components/intelligence/IntelligenceTasksTa
 import MemoryFreshnessTab from '../components/intelligence/MemoryFreshnessTab';
 import MemoryTimelineTab from '../components/intelligence/MemoryTimelineTab';
 import { MemoryWorkspace } from '../components/intelligence/MemoryWorkspace';
+import ModelCouncilTab from '../components/intelligence/ModelCouncilTab';
 import NamespaceOverviewTab from '../components/intelligence/NamespaceOverviewTab';
 import { ToastContainer } from '../components/intelligence/Toast';
 import PillTabBar from '../components/PillTabBar';
@@ -38,7 +39,8 @@ type IntelligenceTab =
   | 'freshness'
   | 'timeline'
   | 'path'
-  | 'namespaces';
+  | 'namespaces'
+  | 'council';
 
 export default function Intelligence() {
   const { t } = useT();
@@ -124,6 +126,7 @@ export default function Intelligence() {
       { id: 'timeline', label: t('memory.tab.timeline') },
       { id: 'path', label: t('memory.tab.path') },
       { id: 'namespaces', label: t('memory.tab.namespaces') },
+      { id: 'council', label: t('memory.tab.council') },
     ];
   const activeTabDef = tabs.find(tab => tab.id === activeTab);
 
@@ -226,6 +229,8 @@ export default function Intelligence() {
             {activeTab === 'path' && <ConnectionPathTab />}
 
             {activeTab === 'namespaces' && <NamespaceOverviewTab />}
+
+            {activeTab === 'council' && <ModelCouncilTab />}
           </div>
         </div>
       </div>
diff --git a/app/src/services/api/modelCouncilApi.test.ts b/app/src/services/api/modelCouncilApi.test.ts
new file mode 100644
index 000000000..da8d25de7
--- /dev/null
+++ b/app/src/services/api/modelCouncilApi.test.ts
@@ -0,0 +1,98 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+
+import { modelCouncilApi, type ModelCouncilResult, unwrapCouncilEnvelope } from './modelCouncilApi';
+
+const mockCallCoreRpc = vi.fn();
+vi.mock('../coreRpcClient', () => ({
+  callCoreRpc: (...args: unknown[]) => mockCallCoreRpc(...args),
+}));
+
+const RESULT: ModelCouncilResult = {
+  question: 'What is the capital of France?',
+  members: [
+    { model: 'model-a', response: 'Paris.', error: null },
+    { model: 'model-b', response: null, error: 'rate limited' },
+  ],
+  chair_model: 'chair-model',
+  synthesis: 'Both agree the capital is Paris (one seat failed).',
+};
+
+describe('unwrapCouncilEnvelope', () => {
+  it('unwraps the { result, logs } CLI envelope', () => {
+    expect(unwrapCouncilEnvelope({ result: RESULT, logs: ['done'] })).toEqual(RESULT);
+  });
+
+  it('passes a bare result through unchanged', () => {
+    expect(unwrapCouncilEnvelope(RESULT)).toEqual(RESULT);
+  });
+
+  it('passes through an object with a result field but no logs (not a real envelope)', () => {
+    // Only `{ result, logs }` (logs array present) is treated as the CLI
+    // envelope. A bare `{ result }` is returned unchanged, not unwrapped.
+    const notAnEnvelope = { result: RESULT } as unknown;
+    expect(unwrapCouncilEnvelope(notAnEnvelope)).toEqual({ result: RESULT });
+  });
+
+  it('does NOT unwrap a null result (guards against { result: null, logs } crashing the UI)', () => {
+    // A partial-error envelope with a null result must not be unwrapped to
+    // `null` — that would crash the component on `result.members`. The guard
+    // returns the payload as-is so the caller surfaces it as a malformed shape.
+    const withNull = { result: null, logs: ['boom'] } as unknown;
+    expect(unwrapCouncilEnvelope(withNull)).toEqual({ result: null, logs: ['boom'] });
+  });
+});
+
+describe('modelCouncilApi.runCouncil', () => {
+  beforeEach(() => {
+    mockCallCoreRpc.mockReset();
+  });
+
+  it('calls openhuman.model_council_run with the params + a long timeout', async () => {
+    mockCallCoreRpc.mockResolvedValueOnce({ result: RESULT, logs: ['ok'] });
+    const out = await modelCouncilApi.runCouncil({
+      question: 'What is the capital of France?',
+      member_models: ['model-a', 'model-b'],
+      chair_model: 'chair-model',
+      temperature: 0.4,
+    });
+    expect(mockCallCoreRpc).toHaveBeenCalledWith({
+      method: 'openhuman.model_council_run',
+      params: {
+        question: 'What is the capital of France?',
+        member_models: ['model-a', 'model-b'],
+        chair_model: 'chair-model',
+        temperature: 0.4,
+      },
+      timeoutMs: 180_000,
+    });
+    expect(out).toEqual(RESULT);
+  });
+
+  it('returns the unwrapped result when the core wraps it in an envelope', async () => {
+    mockCallCoreRpc.mockResolvedValueOnce({ result: RESULT, logs: ['done'] });
+    const out = await modelCouncilApi.runCouncil({
+      question: 'q',
+      member_models: ['a'],
+      chair_model: 'c',
+    });
+    expect(out.members).toHaveLength(2);
+    expect(out.synthesis).toContain('Paris');
+  });
+
+  it('returns a bare result unchanged when no envelope is present', async () => {
+    mockCallCoreRpc.mockResolvedValueOnce(RESULT);
+    const out = await modelCouncilApi.runCouncil({
+      question: 'q',
+      member_models: ['a'],
+      chair_model: 'c',
+    });
+    expect(out).toEqual(RESULT);
+  });
+
+  it('propagates errors from the RPC layer', async () => {
+    mockCallCoreRpc.mockRejectedValueOnce(new Error('all member models failed'));
+    await expect(
+      modelCouncilApi.runCouncil({ question: 'q', member_models: ['a'], chair_model: 'c' })
+    ).rejects.toThrow('all member models failed');
+  });
+});
diff --git a/app/src/services/api/modelCouncilApi.ts b/app/src/services/api/modelCouncilApi.ts
new file mode 100644
index 000000000..368e16436
--- /dev/null
+++ b/app/src/services/api/modelCouncilApi.ts
@@ -0,0 +1,96 @@
+/**
+ * Typed RPC wrapper for the Model Council domain.
+ *
+ * Calls `openhuman.model_council_run` — runs a question through several
+ * "member" models in parallel, then a "chair" model synthesizes their
+ * answers (surfacing agreement / disagreement / unique insight).
+ *
+ * The core returns the result inside a `{ result, logs }` CLI envelope
+ * (the handler attaches a completion log), so `runCouncil` unwraps it
+ * defensively and returns the bare `ModelCouncilResult`.
+ */
+import debug from 'debug';
+
+import { callCoreRpc } from '../coreRpcClient';
+
+const log = debug('model-council:api');
+
+/** One member model's contribution. `response` and `error` are mutually exclusive. */
+export interface CouncilMemberResult {
+  /** The model id this seat ran. */
+  model: string;
+  /** The model's answer, or `null` if the call failed. */
+  response: string | null;
+  /** The failure message, or `null` on success. */
+  error: string | null;
+}
+
+/** Full council result: every member's answer plus the chair synthesis. */
+export interface ModelCouncilResult {
+  question: string;
+  members: CouncilMemberResult[];
+  chair_model: string;
+  synthesis: string;
+}
+
+export interface RunCouncilParams {
+  question: string;
+  /** Member model ids to consult (deduplicated + capped server-side). */
+  member_models: string[];
+  /** Model id that synthesizes the member answers. */
+  chair_model: string;
+  /** Optional sampling temperature applied to every call. */
+  temperature?: number;
+}
+
+function asRecord(value: unknown): Record<string, unknown> | null {
+  if (!value || typeof value !== 'object' || Array.isArray(value)) {
+    return null;
+  }
+  return value as Record<string, unknown>;
+}
+
+/**
+ * Unwrap the core's `{ result, logs }` CLI envelope. Returns the inner
+ * `result` when the envelope shape is present, otherwise passes the payload
+ * through unchanged — so the caller is correct whether or not the handler
+ * attached logs.
+ */
+export function unwrapCouncilEnvelope(payload: unknown): ModelCouncilResult {
+  const record = asRecord(payload);
+  if (
+    record &&
+    'result' in record &&
+    record.result != null &&
+    'logs' in record &&
+    Array.isArray(record.logs)
+  ) {
+    return record.result as ModelCouncilResult;
+  }
+  return payload as ModelCouncilResult;
+}
+
+export const modelCouncilApi = {
+  runCouncil: async (params: RunCouncilParams): Promise<ModelCouncilResult> => {
+    log(
+      'run question=%s members=%o chair=%s',
+      params.question.slice(0, 40),
+      params.member_models,
+      params.chair_model
+    );
+    const payload = await callCoreRpc<unknown>({
+      method: 'openhuman.model_council_run',
+      params,
+      // Member calls run in parallel but each is a full model round-trip plus
+      // a synthesis pass — give it well beyond the default 30s before timing out.
+      timeoutMs: 180_000,
+    });
+    const result = unwrapCouncilEnvelope(payload);
+    log(
+      'run done: %d members, synthesis %d chars',
+      result.members?.length ?? 0,
+      result.synthesis?.length ?? 0
+    );
+    return result;
+  },
+};
diff --git a/app/test/playwright/specs/insights-dashboard.spec.ts b/app/test/playwright/specs/insights-dashboard.spec.ts
index e586eb1fe..69f1ae005 100644
--- a/app/test/playwright/specs/insights-dashboard.spec.ts
+++ b/app/test/playwright/specs/insights-dashboard.spec.ts
@@ -7,6 +7,10 @@ test.describe('Insights Dashboard', () => {
     await bootAuthenticatedPage(page, 'pw-insights-user', '/intelligence');
     await waitForAppReady(page);
 
+    // The Intelligence page now defaults to the "Agent Tasks" tab (#2998), so
+    // select the Memory tab before asserting its workspace renders.
+    await page.getByRole('tab', { name: 'Memory', exact: true }).click();
+
     await expect(page.getByRole('heading', { name: 'Memory', exact: true })).toBeVisible();
     await expect(page.locator('[data-testid="memory-workspace"]')).toBeVisible();
     await expect(page.locator('[data-testid="memory-actions"]')).toBeVisible();
diff --git a/src/core/all.rs b/src/core/all.rs
index 73a784742..82400c88c 100644
--- a/src/core/all.rs
+++ b/src/core/all.rs
@@ -169,6 +169,8 @@ fn build_registered_controllers() -> Vec<RegisteredController> {
     controllers.extend(crate::openhuman::service::all_service_registered_controllers());
     // Data migration utilities
     controllers.extend(crate::openhuman::migration::all_migration_registered_controllers());
+    // Model Council: multi-model deliberation (parallel members + chair synthesis)
+    controllers.extend(crate::openhuman::model_council::all_model_council_registered_controllers());
     // Unified inference domain: text / vision / local runtime / cloud providers.
     // (Formerly split across inference, local_ai, and providers namespaces.)
     controllers.extend(crate::openhuman::inference::all_inference_registered_controllers());
@@ -327,6 +329,7 @@ fn build_declared_controller_schemas() -> Vec<ControllerSchema> {
     schemas.extend(crate::openhuman::credentials::all_credentials_controller_schemas());
     schemas.extend(crate::openhuman::service::all_service_controller_schemas());
     schemas.extend(crate::openhuman::migration::all_migration_controller_schemas());
+    schemas.extend(crate::openhuman::model_council::all_model_council_controller_schemas());
     schemas.extend(crate::openhuman::inference::all_inference_controller_schemas());
     schemas.extend(crate::openhuman::inference::all_local_ai_controller_schemas());
     schemas.extend(crate::openhuman::embeddings::all_embeddings_controller_schemas());
diff --git a/src/openhuman/mod.rs b/src/openhuman/mod.rs
index 42cd189d2..96d295b71 100644
--- a/src/openhuman/mod.rs
+++ b/src/openhuman/mod.rs
@@ -73,6 +73,7 @@ pub mod memory_tools;
 pub mod memory_tree;
 pub mod migration;
 pub mod migrations;
+pub mod model_council;
 pub mod notifications;
 pub mod overlay;
 pub mod people;
diff --git a/src/openhuman/model_council/council.rs b/src/openhuman/model_council/council.rs
new file mode 100644
index 000000000..b27737bb3
--- /dev/null
+++ b/src/openhuman/model_council/council.rs
@@ -0,0 +1,419 @@
+//! Model Council — multi-model deliberation core.
+//!
+//! A "council" runs one user question against several **member** models
+//! concurrently (each a single-shot, tool-free completion via the existing
+//! [`agent_chat_simple`] primitive), then asks a single **chair** model to
+//! synthesize the member answers into one response that surfaces where the
+//! models **agree**, where they **disagree**, and what unique insight each
+//! contributes.
+//!
+//! ## Why single-shot (not the full agent loop)
+//!
+//! Council members are deliberately *plain* completions: no tools, no memory
+//! writes, no multi-round agent loop. The value of a council is independent
+//! perspectives on the same prompt, so each member must see exactly the same
+//! input and nothing else. Reusing [`agent_chat_simple`] (which itself does a
+//! single `chat_with_system(None, …)` call) keeps every member identical and
+//! avoids duplicating provider-resolution logic here.
+//!
+//! ## Partial failure is tolerated, total failure is not
+//!
+//! If one member errors (model unavailable, rate-limited, …) the council still
+//! proceeds: that seat is recorded as an error and the chair is told the seat
+//! was empty. Only when **every** member fails do we abort — synthesizing from
+//! zero answers would be meaningless.
+//!
+//! The pure helpers ([`validate_council_request`], [`normalize_member_models`],
+//! [`build_synthesis_prompt`], [`all_members_failed`]) are split out from the
+//! I/O orchestrator ([`run_council`]) so the deliberation logic is unit-tested
+//! without any network or provider.
+
+use serde::Serialize;
+
+use crate::openhuman::config::Config;
+use crate::openhuman::inference::local::rpc::agent_chat_simple;
+use crate::rpc::RpcOutcome;
+
+/// Upper bound on how many member models a single council run may fan out to.
+///
+/// Each member is a real model call, so an unbounded list would let one RPC
+/// spawn arbitrarily many concurrent completions. Five is generous for the
+/// "compare a few frontier models" use case while keeping cost bounded.
+pub const MAX_COUNCIL_MEMBERS: usize = 5;
+
+/// One member model's contribution to a council run.
+///
+/// `response` and `error` are mutually exclusive: exactly one is `Some`.
+/// Both are serialized (as `null` when absent) so the importer/UI can render a
+/// stable shape without guessing which key exists.
+#[derive(Debug, Clone, PartialEq, Serialize)]
+pub struct CouncilMemberResult {
+    /// The model id this seat ran (the resolved override passed to the provider).
+    pub model: String,
+    /// The model's answer, or `None` if the call failed.
+    pub response: Option<String>,
+    /// The failure message, or `None` on success.
+    pub error: Option<String>,
+}
+
+/// Full result of a council run: every member's answer plus the chair synthesis.
+#[derive(Debug, Clone, PartialEq, Serialize)]
+pub struct ModelCouncilResult {
+    /// The original user question, echoed back for display / logging.
+    pub question: String,
+    /// One entry per (normalized) member model, in input order.
+    pub members: Vec<CouncilMemberResult>,
+    /// The model id that produced the synthesis.
+    pub chair_model: String,
+    /// The chair's synthesized answer over the member responses.
+    pub synthesis: String,
+}
+
+/// Normalize the requested member model list: trim each id, drop blanks, and
+/// de-duplicate while preserving first-seen order.
+///
+/// De-duplication matters because the result is keyed by model id in the UI;
+/// two identical seats would collide and also waste a model call. PURE.
+pub fn normalize_member_models(member_models: &[String]) -> Vec<String> {
+    let mut seen: Vec<String> = Vec::new();
+    for raw in member_models {
+        let trimmed = raw.trim();
+        if trimmed.is_empty() {
+            continue;
+        }
+        if !seen.iter().any(|m| m.as_str() == trimmed) {
+            seen.push(trimmed.to_string());
+        }
+    }
+    seen
+}
+
+/// Validate a council request against the *normalized* member list. PURE.
+///
+/// Returns a stable, human-readable error string on the first violation so the
+/// JSON-RPC layer can surface it directly.
+pub fn validate_council_request(
+    question: &str,
+    normalized_members: &[String],
+    chair_model: &str,
+) -> Result<(), String> {
+    if question.trim().is_empty() {
+        return Err("model council: question must not be empty".to_string());
+    }
+    if normalized_members.is_empty() {
+        return Err("model council: at least one member model is required".to_string());
+    }
+    if normalized_members.len() > MAX_COUNCIL_MEMBERS {
+        return Err(format!(
+            "model council: too many member models ({}, max {})",
+            normalized_members.len(),
+            MAX_COUNCIL_MEMBERS
+        ));
+    }
+    if chair_model.trim().is_empty() {
+        return Err("model council: chair model must not be empty".to_string());
+    }
+    Ok(())
+}
+
+/// True when every member failed, so synthesis would have nothing to work with.
+///
+/// An empty slice is NOT "all failed" (there were no seats to fail); callers
+/// validate non-emptiness separately. PURE.
+pub fn all_members_failed(members: &[CouncilMemberResult]) -> bool {
+    !members.is_empty() && members.iter().all(|m| m.response.is_none())
+}
+
+/// Build the chair's synthesis prompt from the question + member answers. PURE.
+///
+/// Failed seats are surfaced explicitly (as "[no response: …]") so the chair
+/// knows a perspective is missing rather than silently synthesizing from fewer
+/// answers than the user asked for. Members are labeled "Model A/B/C…" rather
+/// than by raw id to keep the chair focused on the *content* of each answer.
+pub fn build_synthesis_prompt(question: &str, members: &[CouncilMemberResult]) -> String {
+    let mut prompt = String::new();
+    prompt.push_str(
+        "You are the chair of a model council. Several AI models were each asked \
+         the SAME question independently. Your job is to synthesize their answers \
+         into one clear, balanced response for the user.\n\n",
+    );
+    prompt.push_str("Original question:\n");
+    prompt.push_str(question.trim());
+    prompt.push_str("\n\n");
+    prompt.push_str("Member answers:\n");
+    for (i, member) in members.iter().enumerate() {
+        let label = council_member_label(i);
+        prompt.push_str(&format!("\n--- Model {label} ---\n"));
+        match &member.response {
+            Some(text) => prompt.push_str(text.trim()),
+            None => {
+                let reason = member.error.as_deref().unwrap_or("unknown error");
+                prompt.push_str(&format!("[no response: {reason}]"));
+            }
+        }
+        prompt.push('\n');
+    }
+    prompt.push_str(
+        "\nNow write the synthesis. Explicitly cover:\n\
+         1. Where the models AGREE (the consensus the user can rely on).\n\
+         2. Where they DISAGREE or diverge (and, if you can tell, which view is \
+         better supported).\n\
+         3. Any unique insight a single model contributed that the others missed.\n\
+         End with a concise bottom-line recommendation. Do not invent agreement \
+         that is not present; if the answers genuinely conflict, say so plainly.",
+    );
+    prompt
+}
+
+/// Map a zero-based member index to a stable display label: A, B, …, Z, then
+/// AA, AB, … (spreadsheet-column style). Used only to label answers for the
+/// chair; never parsed back. PURE.
+fn council_member_label(index: usize) -> String {
+    let mut n = index;
+    let mut label = String::new();
+    loop {
+        label.insert(0, (b'A' + (n % 26) as u8) as char);
+        if n < 26 {
+            break;
+        }
+        n = n / 26 - 1;
+    }
+    label
+}
+
+/// Run a full council: fan out to every member concurrently, then synthesize.
+///
+/// Reuses [`agent_chat_simple`] for both the member calls and the chair call so
+/// provider resolution, prompt-injection guarding, and temperature handling are
+/// all inherited unchanged. Member calls run concurrently via
+/// [`futures_util::future::join_all`]; wall-clock is the slowest single member,
+/// not their sum.
+pub async fn run_council(
+    config: &Config,
+    question: &str,
+    member_models: &[String],
+    chair_model: &str,
+    temperature: Option<f64>,
+) -> Result<RpcOutcome<ModelCouncilResult>, String> {
+    let models = normalize_member_models(member_models);
+    validate_council_request(question, &models, chair_model)?;
+
+    log::debug!(
+        "[model-council] run_council: question_len={}, members={}, chair={}, temp={:?}",
+        question.len(),
+        models.len(),
+        chair_model,
+        temperature
+    );
+
+    // Fan out: each member answers the SAME question as an independent
+    // single-shot completion. A per-member failure is captured in-band as an
+    // error seat rather than aborting the whole council.
+    let member_futures = models.iter().map(|model| {
+        let model = model.clone();
+        async move {
+            match agent_chat_simple(config, question, Some(model.clone()), temperature).await {
+                Ok(outcome) => CouncilMemberResult {
+                    model,
+                    response: Some(outcome.value),
+                    error: None,
+                },
+                Err(e) => CouncilMemberResult {
+                    model,
+                    response: None,
+                    error: Some(e),
+                },
+            }
+        }
+    });
+    let members: Vec<CouncilMemberResult> = futures_util::future::join_all(member_futures).await;
+
+    let success_count = members.iter().filter(|m| m.response.is_some()).count();
+    log::debug!(
+        "[model-council] member results: success={}, failed={}",
+        success_count,
+        members.len() - success_count
+    );
+
+    if all_members_failed(&members) {
+        log::debug!("[model-council] all members failed; aborting before synthesis");
+        return Err("model council: all member models failed to respond".to_string());
+    }
+
+    let synthesis_prompt = build_synthesis_prompt(question, &members);
+    log::debug!("[model-council] convening chair model: {chair_model}");
+    let synthesis = agent_chat_simple(
+        config,
+        &synthesis_prompt,
+        Some(chair_model.to_string()),
+        temperature,
+    )
+    .await
+    .map_err(|e| format!("model council: chair synthesis failed: {e}"))?
+    .value;
+    log::debug!(
+        "[model-council] synthesis complete: {} chars",
+        synthesis.len()
+    );
+
+    let result = ModelCouncilResult {
+        question: question.to_string(),
+        members,
+        chair_model: chair_model.to_string(),
+        synthesis,
+    };
+    Ok(RpcOutcome::single_log(
+        result,
+        "model council synthesis completed",
+    ))
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use serde_json::Value;
+
+    fn ok_member(model: &str, response: &str) -> CouncilMemberResult {
+        CouncilMemberResult {
+            model: model.to_string(),
+            response: Some(response.to_string()),
+            error: None,
+        }
+    }
+
+    fn err_member(model: &str, error: &str) -> CouncilMemberResult {
+        CouncilMemberResult {
+            model: model.to_string(),
+            response: None,
+            error: Some(error.to_string()),
+        }
+    }
+
+    #[test]
+    fn normalize_trims_drops_blanks_and_dedups_preserving_order() {
+        let input = vec![
+            " gpt ".to_string(),
+            "claude".to_string(),
+            "".to_string(),
+            "   ".to_string(),
+            "gpt".to_string(), // dup of trimmed " gpt "
+            "gemini".to_string(),
+            "claude".to_string(), // dup
+        ];
+        let out = normalize_member_models(&input);
+        assert_eq!(out, vec!["gpt", "claude", "gemini"]);
+    }
+
+    #[test]
+    fn validate_rejects_empty_question() {
+        let members = vec!["a".to_string()];
+        let err = validate_council_request("   ", &members, "chair").unwrap_err();
+        assert!(err.contains("question"));
+    }
+
+    #[test]
+    fn validate_rejects_no_members() {
+        let err = validate_council_request("q", &[], "chair").unwrap_err();
+        assert!(err.contains("at least one member"));
+    }
+
+    #[test]
+    fn validate_rejects_too_many_members() {
+        let members: Vec<String> = (0..(MAX_COUNCIL_MEMBERS + 1))
+            .map(|i| format!("m{i}"))
+            .collect();
+        let err = validate_council_request("q", &members, "chair").unwrap_err();
+        assert!(err.contains("too many"));
+    }
+
+    #[test]
+    fn validate_rejects_blank_chair() {
+        let members = vec!["a".to_string()];
+        let err = validate_council_request("q", &members, "  ").unwrap_err();
+        assert!(err.contains("chair"));
+    }
+
+    #[test]
+    fn validate_accepts_well_formed_request() {
+        let members = vec!["a".to_string(), "b".to_string()];
+        assert!(validate_council_request("q", &members, "chair").is_ok());
+    }
+
+    #[test]
+    fn all_members_failed_is_false_when_any_succeeds() {
+        let members = vec![err_member("a", "boom"), ok_member("b", "hi")];
+        assert!(!all_members_failed(&members));
+    }
+
+    #[test]
+    fn all_members_failed_is_true_only_when_every_seat_failed() {
+        let members = vec![err_member("a", "boom"), err_member("b", "nope")];
+        assert!(all_members_failed(&members));
+    }
+
+    #[test]
+    fn all_members_failed_is_false_for_empty_slice() {
+        assert!(!all_members_failed(&[]));
+    }
+
+    #[test]
+    fn synthesis_prompt_includes_question_and_each_answer() {
+        let members = vec![
+            ok_member("gpt", "Paris is the capital."),
+            ok_member("claude", "The capital is Paris."),
+        ];
+        let prompt = build_synthesis_prompt("What is the capital of France?", &members);
+        assert!(prompt.contains("What is the capital of France?"));
+        assert!(prompt.contains("Paris is the capital."));
+        assert!(prompt.contains("The capital is Paris."));
+        assert!(prompt.contains("Model A"));
+        assert!(prompt.contains("Model B"));
+        // The chair must be instructed to surface agreement + disagreement.
+        assert!(prompt.contains("AGREE"));
+        assert!(prompt.contains("DISAGREE"));
+    }
+
+    #[test]
+    fn synthesis_prompt_marks_failed_seats_with_their_error() {
+        let members = vec![
+            ok_member("gpt", "ok answer"),
+            err_member("claude", "rate limited"),
+        ];
+        let prompt = build_synthesis_prompt("q", &members);
+        assert!(prompt.contains("[no response: rate limited]"));
+        assert!(prompt.contains("ok answer"));
+    }
+
+    #[test]
+    fn member_labels_are_spreadsheet_style() {
+        assert_eq!(council_member_label(0), "A");
+        assert_eq!(council_member_label(1), "B");
+        assert_eq!(council_member_label(25), "Z");
+        assert_eq!(council_member_label(26), "AA");
+        assert_eq!(council_member_label(27), "AB");
+    }
+
+    #[test]
+    fn result_serializes_with_stable_keys_and_null_for_absent_fields() {
+        let result = ModelCouncilResult {
+            question: "q".to_string(),
+            members: vec![ok_member("gpt", "answer"), err_member("claude", "boom")],
+            chair_model: "chair-model".to_string(),
+            synthesis: "the synthesis".to_string(),
+        };
+        let json: Value = serde_json::to_value(&result).unwrap();
+        assert_eq!(json["question"], "q");
+        assert_eq!(json["chair_model"], "chair-model");
+        assert_eq!(json["synthesis"], "the synthesis");
+        let members = json["members"].as_array().unwrap();
+        assert_eq!(members.len(), 2);
+        // Success seat: response set, error null.
+        assert_eq!(members[0]["model"], "gpt");
+        assert_eq!(members[0]["response"], "answer");
+        assert!(members[0]["error"].is_null());
+        // Failure seat: response null, error set.
+        assert_eq!(members[1]["model"], "claude");
+        assert!(members[1]["response"].is_null());
+        assert_eq!(members[1]["error"], "boom");
+    }
+}
diff --git a/src/openhuman/model_council/mod.rs b/src/openhuman/model_council/mod.rs
new file mode 100644
index 000000000..988b9aee1
--- /dev/null
+++ b/src/openhuman/model_council/mod.rs
@@ -0,0 +1,14 @@
+//! Model Council — run one question through several models in parallel and
+//! synthesize their answers with a chair model.
+//!
+//! See [`council`] for the deliberation core (pure helpers + the
+//! [`council::run_council`] orchestrator) and [`schemas`] for the JSON-RPC
+//! controller surface (`openhuman.model_council_run`).
+
+pub mod council;
+mod schemas;
+
+pub use schemas::{
+    all_controller_schemas as all_model_council_controller_schemas,
+    all_registered_controllers as all_model_council_registered_controllers,
+};
diff --git a/src/openhuman/model_council/schemas.rs b/src/openhuman/model_council/schemas.rs
new file mode 100644
index 000000000..61f503be3
--- /dev/null
+++ b/src/openhuman/model_council/schemas.rs
@@ -0,0 +1,238 @@
+//! JSON-RPC controller surface for the Model Council.
+//!
+//! Exposes a single method, `openhuman.model_council_run`, which takes a
+//! question + a list of member model ids + a chair model id, runs the council
+//! (see [`crate::openhuman::model_council::council`]), and returns the
+//! aggregated result synchronously in the JSON-RPC response.
+
+use serde::de::DeserializeOwned;
+use serde::Deserialize;
+use serde_json::{Map, Value};
+
+use crate::core::all::{ControllerFuture, RegisteredController};
+use crate::core::{ControllerSchema, FieldSchema, TypeSchema};
+use crate::openhuman::config::rpc as config_rpc;
+use crate::rpc::RpcOutcome;
+
+#[derive(Debug, Deserialize)]
+struct ModelCouncilParams {
+    question: String,
+    member_models: Vec<String>,
+    chair_model: String,
+    temperature: Option<f64>,
+}
+
+pub fn all_controller_schemas() -> Vec<ControllerSchema> {
+    vec![schemas("run")]
+}
+
+pub fn all_registered_controllers() -> Vec<RegisteredController> {
+    vec![RegisteredController {
+        schema: schemas("run"),
+        handler: handle_run,
+    }]
+}
+
+pub fn schemas(function: &str) -> ControllerSchema {
+    match function {
+        "run" => ControllerSchema {
+            namespace: "model_council",
+            function: "run",
+            description: "Run a question through several member models concurrently, then \
+                          synthesize their answers with a chair model. Returns each member's \
+                          answer (or error) plus the chair's synthesis.",
+            inputs: vec![
+                required_string("question", "The question to put to the council."),
+                required_string_array(
+                    "member_models",
+                    "Member model ids to consult (deduplicated; max 5).",
+                ),
+                required_string(
+                    "chair_model",
+                    "Model id that synthesizes the member answers.",
+                ),
+                optional_f64(
+                    "temperature",
+                    "Optional sampling temperature for all calls.",
+                ),
+            ],
+            outputs: vec![json_output(
+                "result",
+                "Council result: per-member answers + chair synthesis.",
+            )],
+        },
+        _ => ControllerSchema {
+            namespace: "model_council",
+            function: "unknown",
+            description: "Unknown model_council controller function.",
+            inputs: vec![],
+            outputs: vec![FieldSchema {
+                name: "error",
+                ty: TypeSchema::String,
+                comment: "Error message.",
+                required: true,
+            }],
+        },
+    }
+}
+
+fn handle_run(params: Map<String, Value>) -> ControllerFuture {
+    Box::pin(async move {
+        log::debug!("[model-council] handle_run: received RPC request");
+        let p = deserialize_params::<ModelCouncilParams>(params)?;
+        // Log a sanitized summary only — never the full question text.
+        log::debug!(
+            "[model-council] handle_run: question_len={}, members={}, chair={}",
+            p.question.len(),
+            p.member_models.len(),
+            p.chair_model
+        );
+        let config = config_rpc::load_config_with_timeout().await?;
+        to_json(
+            crate::openhuman::model_council::council::run_council(
+                &config,
+                &p.question,
+                &p.member_models,
+                &p.chair_model,
+                p.temperature,
+            )
+            .await
+            .map_err(|e| {
+                log::debug!("[model-council] handle_run: run_council failed: {e}");
+                e
+            })?,
+        )
+    })
+}
+
+fn deserialize_params<T: DeserializeOwned>(params: Map<String, Value>) -> Result<T, String> {
+    serde_json::from_value(Value::Object(params)).map_err(|e| format!("invalid params: {e}"))
+}
+
+fn required_string(name: &'static str, comment: &'static str) -> FieldSchema {
+    FieldSchema {
+        name,
+        ty: TypeSchema::String,
+        comment,
+        required: true,
+    }
+}
+
+fn required_string_array(name: &'static str, comment: &'static str) -> FieldSchema {
+    FieldSchema {
+        name,
+        ty: TypeSchema::Array(Box::new(TypeSchema::String)),
+        comment,
+        required: true,
+    }
+}
+
+fn optional_f64(name: &'static str, comment: &'static str) -> FieldSchema {
+    FieldSchema {
+        name,
+        ty: TypeSchema::Option(Box::new(TypeSchema::F64)),
+        comment,
+        required: false,
+    }
+}
+
+fn json_output(name: &'static str, comment: &'static str) -> FieldSchema {
+    FieldSchema {
+        name,
+        ty: TypeSchema::Json,
+        comment,
+        required: true,
+    }
+}
+
+fn to_json<T: serde::Serialize>(outcome: RpcOutcome<T>) -> Result<Value, String> {
+    outcome.into_cli_compatible_json()
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn controller_schema_inventory_is_stable() {
+        let schemas = all_controller_schemas();
+        let functions: Vec<_> = schemas.iter().map(|schema| schema.function).collect();
+        assert_eq!(functions, vec!["run"]);
+        assert_eq!(schemas.len(), all_registered_controllers().len());
+    }
+
+    #[test]
+    fn run_schema_exposes_expected_inputs_and_method_name() {
+        let run = schemas("run");
+        assert_eq!(run.namespace, "model_council");
+        assert_eq!(run.function, "run");
+        assert_eq!(
+            crate::core::all::rpc_method_name(&run),
+            "openhuman.model_council_run"
+        );
+        assert_eq!(run.inputs.len(), 4);
+        assert!(run
+            .inputs
+            .iter()
+            .any(|input| input.name == "question" && input.required));
+        let members = run
+            .inputs
+            .iter()
+            .find(|input| input.name == "member_models")
+            .expect("member_models input present");
+        assert!(matches!(members.ty, TypeSchema::Array(_)));
+        assert!(members.required);
+        let temperature = run
+            .inputs
+            .iter()
+            .find(|input| input.name == "temperature")
+            .expect("temperature input present");
+        assert!(!temperature.required);
+        assert!(matches!(temperature.ty, TypeSchema::Option(_)));
+    }
+
+    #[test]
+    fn unknown_function_falls_back_to_error_output() {
+        let unknown = schemas("nope");
+        assert_eq!(unknown.function, "unknown");
+        assert_eq!(unknown.outputs[0].name, "error");
+    }
+
+    #[test]
+    fn deserialize_params_parses_a_well_formed_payload() {
+        let params = Map::from_iter([
+            ("question".to_string(), Value::from("What is 2+2?")),
+            (
+                "member_models".to_string(),
+                Value::from(vec![Value::from("gpt"), Value::from("claude")]),
+            ),
+            ("chair_model".to_string(), Value::from("chair")),
+            ("temperature".to_string(), Value::from(0.5)),
+        ]);
+        let parsed = deserialize_params::<ModelCouncilParams>(params).unwrap();
+        assert_eq!(parsed.question, "What is 2+2?");
+        assert_eq!(parsed.member_models, vec!["gpt", "claude"]);
+        assert_eq!(parsed.chair_model, "chair");
+        assert_eq!(parsed.temperature, Some(0.5));
+    }
+
+    #[test]
+    fn deserialize_params_allows_omitted_temperature() {
+        let params = Map::from_iter([
+            ("question".to_string(), Value::from("q")),
+            (
+                "member_models".to_string(),
+                Value::from(vec![Value::from("a")]),
+            ),
+            ("chair_model".to_string(), Value::from("chair")),
+        ]);
+        let parsed = deserialize_params::<ModelCouncilParams>(params).unwrap();
+        assert_eq!(parsed.temperature, None);
+    }
+
+    #[test]
+    fn deserialize_params_rejects_missing_required_field() {
+        let params = Map::from_iter([("question".to_string(), Value::from("q"))]);
+        assert!(deserialize_params::<ModelCouncilParams>(params).is_err());
+    }
+}