# LLM Council > Convene a multi-model Claude COUNCIL for a high-stakes, ambiguous, or irreversible decision — or whenever you want a genuine second opinion. Four different Claude models (Opus 5, Sonnet 4.6, Haiku 4.5, Fable 5) answer the SAME question independently and in parallel, then peer-review each other ANONYMOUSLY (answers shown as Response A/B/C, model identity hidden, so no model is favored by name), and an Opus 5 president synthesizes the final verdict WHILE surfacing the dissent. Inspired by Karpathy's LLM Council, re-implemented on the OmegaOS Workflow primitive. 100% Claude Code-native — NO API KEYS, no OpenRouter, no external provider, no extra cost: the members run as in-process Workflow sub-agents through your EXISTING Claude Code session. Use when the user says "llm council", "convene the council", "ask the council", "@council", "/llm-council", "second opinion", "deliberate", "multiple models", or faces a "high-stakes decision" / architecture choice / contradictory verification verdicts / a pre-commit design - Skill: `agentik-os/llm-council` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add agentik-os/llm-council` - Raw SKILL.md: https://api.skillmd.com/api/skills/agentik-os/llm-council/raw - Safety review: pending - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: AI & ML - Author: agentik-os (https://skillmd.com/u/agentik-os) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/agentik-os/llm-council --- # /llm-council — Multi-Model Claude Deliberation Council Convene a **council of Claude models** on one hard question. Four different Claude models answer **independently**, **anonymously peer-review** each other, and an **Opus president** writes the final verdict that explicitly preserves the dissent. The whole council runs **in-process** through the **OmegaOS Workflow primitive** — it is the heavyweight "many minds on one decision" tool. > Inspired by Andrej Karpathy's *LLM Council* (multiple frontier models answer, rank each other > blind, a chairman synthesizes). The difference here is the runtime, below. ## 100% Claude Code-native — NO API keys **This council asks for zero API keys and costs nothing beyond your current Claude Code session.** | | Karpathy's LLM Council | OmegaOS `llm-council` | |---|---|---| | Members | GPT / Gemini / Grok / Claude via **OpenRouter** | **Four Claude models** (Opus 5, Sonnet 4.6, Haiku 4.5, Fable 5) | | Auth | An **OpenRouter API key** + per-provider keys/billing | **None** — your existing logged-in Claude Code session | | Runtime | A Python web app calling external HTTP APIs | **In-process Workflow `agent()` sub-agents** | | Extra cost | Per-token charges on each external provider | **None beyond the base Claude Code token/subscription** | The members are spawned with the **Workflow tool's `agent(prompt, { model })`** — each runs on the operator's already-authenticated Claude Code session (their base token / subscription). There is **no `ANTHROPIC_API_KEY`, no `OPENROUTER_API_KEY`, no external endpoint, and no extra billing**. If you ever feel tempted to reach for an API key or an `anthropic` SDK call here — **don't**. The Workflow tool is the only mechanism this skill uses to fan out to the four models. ## When to convene (and when NOT to) The council spends roughly **4× the tokens** of a single answer (four members + a peer-review round + a president). Reserve it for decisions where that buys real safety — aligned with **R-COUNCIL** and the OmegaOS quality laws: **Convene when:** - The decision is **high-stakes / irreversible / hard to undo** — an architecture choice, a schema migration, a "drop the prod table?" call, monorepo-vs-polyrepo. - Two adversarial verdicts **contradict** each other (a verify says PASS, an audit says FAIL) and you need a tie-break with the dissent preserved. - A **pre-commit design** judgment where being wrong is expensive. - The user **explicitly** invokes it: `@council`, `/llm-council`, "convene the council", "I want a second opinion from multiple models", "deliberate this". **Do NOT convene for:** routine edits, a one-line fix, a lookup, anything a single model answers cheaply, or unattended bulk work. A council on a trivial task is just 4× the cost for no gain. > Invoked by /llm-council, /council, /omg-llm-council, /omg-council, or @council — they all convene THIS one multi-model council. ## The protocol — three stages ### Stage 1 — Members answer independently (parallel) Four Claude models receive the **same** question and answer it **independently**, with no knowledge of each other's responses. Each is a Workflow `agent()` pinned to a specific model: | Seat | Model id | Why it's on the council | |---|---|---| | Opus 5 | `opus` | Deepest reasoning, the frontier seat | | Sonnet 4.6 | `claude-sonnet-4-6` | Strong generalist, different training balance | | Haiku 4.5 | `claude-haiku-4-5` | Fast, terse — a useful contrarian on over-thinking | | Fable 5 | `claude-fable-5` | The most powerful tier — independent high-capability lens | Running the **same prompt across different models** is the whole point: their disagreements expose the real uncertainty in the decision. A single model's confident answer hides it. ### Stage 2 — Anonymized peer-review (parallel) Each member is shown the **other three** answers — **stripped of model identity** and relabelled **Response A / B / C** — and asked to rank and critique them on **accuracy, insight, and completeness**. Anonymity is the load-bearing detail: a model must not be able to favor "the Opus answer" or dismiss "the Haiku answer" by name. It judges the *content*, blind. Each reviewer returns, for the three anonymized peers: a **ranking** (best → worst) with a one-line justification each, the **strongest single point** any peer made, and the **most important flaw or omission** across them. ### Stage 3 — The President synthesizes (Opus 5) A final **Opus 5** president receives **all four original answers** plus **all four peer-reviews** and writes the verdict. The president does NOT just pick a winner — it **reconciles** the council into one answer and **explicitly records where the council disagreed**. Erasing the minority view is forbidden (this mirrors R-COUNCIL / R-VERIFY: dissent is signal, not noise). President output is exactly: ``` ## Verdict ## Why ## Where the council disagreed ## Confidence — ``` ## Runnable Workflow script (copy-pasteable) Run the council with the **Workflow tool**, using this script. It implements members → anonymized peer-review → president. It is **deterministic**: member prompts vary by a fixed role/index, anonymization uses a **static** A/B/C labelling (no shuffle), and it uses **no** non-deterministic built-ins (no `Date.now()`, no `Math.random()` — the runtime forbids them). Replace `QUESTION` with the user's actual decision (or read it from `$ARGUMENTS`). ```javascript // llm-council — multi-model Claude deliberation on ONE question. // 100% Claude Code-native: members are in-process Workflow agents on the // existing session. No API keys, no external providers. meta({ title: "LLM Council", description: "Four Claude models answer, blind-peer-review, Opus president synthesizes with dissent.", }); const QUESTION = `<<>>`; // The four council seats. Order is fixed → the run is deterministic. const SEATS = [ { name: "Opus 5", model: "opus" }, { name: "Sonnet 4.6", model: "claude-sonnet-4-6" }, { name: "Haiku 4.5", model: "claude-haiku-4-5" }, { name: "Fable 5", model: "claude-fable-5" }, ]; // ---- Stage 1: members answer INDEPENDENTLY, in parallel ------------------- const memberPrompt = (seatIndex) => `You are council member #${seatIndex + 1} of a multi-model deliberation. Answer the question below INDEPENDENTLY and on the merits. Do not hedge to a committee average — give your own best, well-reasoned answer, state your key assumptions explicitly, and name the main tradeoff or risk you see. Be concrete. You are NOT told what the other members said. QUESTION: ${QUESTION}`; const answers = await parallel( SEATS.map((seat, i) => agent(memberPrompt(i), { model: seat.model }) ) ); // answers[i] is seat i's independent answer (string). // ---- Stage 2: ANONYMIZED peer-review, in parallel ------------------------- // Each reviewer sees the OTHER three answers, relabelled Response A/B/C with // model identity hidden. Static labelling (no shuffle) keeps the run reproducible. const LABELS = ["A", "B", "C"]; const reviewPrompt = (reviewerIndex) => { const others = answers .map((text, i) => ({ text, i })) .filter((o) => o.i !== reviewerIndex); // the other three seats const anonymized = others .map((o, k) => `### Response ${LABELS[k]}\n${o.text}`) .join("\n\n"); return `You are peer-reviewing three ANONYMOUS answers to the same question. The author models are hidden on purpose — judge ONLY the content, not any guessed identity. Rank Response A, B, and C from best to worst on accuracy, insight, and completeness, with a one-line justification for each. Then name the single strongest point made across all three, and the single most important flaw or omission. QUESTION: ${QUESTION} ANSWERS TO REVIEW (anonymized): ${anonymized}`; }; const reviews = await parallel( SEATS.map((seat, i) => agent(reviewPrompt(i), { model: seat.model }) ) ); // reviews[i] is seat i's blind ranking + critique of the other three (string). // ---- Stage 3: the PRESIDENT synthesizes (Opus 5) ------------------------ const dossier = SEATS.map((seat, i) => `## Member ${i + 1} — ${seat.name}\n### Answer\n${answers[i]}\n### This member's peer-review of the others\n${reviews[i]}` ).join("\n\n"); const presidentPrompt = `You are the PRESIDENT of an LLM council (model: Opus 5). Four members each answered the question independently, then blind-peer-reviewed each other. Synthesize the FINAL answer. Do not merely pick a winner — reconcile the council into one coherent recommendation, give the reasoning it converged on (citing the strongest peer-reviewed points), and EXPLICITLY preserve the dissent: where members disagreed, what the minority argued, and why it did or did not carry. Never erase a minority view. Use EXACTLY these sections: ## Verdict ## Why ## Where the council disagreed ## Confidence QUESTION: ${QUESTION} COUNCIL DOSSIER (all four answers + all four peer-reviews): ${dossier}`; const verdict = await agent(presidentPrompt, { model: "opus" }); return verdict; ``` **Notes for the running agent** - `agent(prompt, { model })` and `parallel([...])` are Workflow primitives — they spawn in-process sub-agents on the **current session**. No key, no SDK, no network call to an external provider. - A Workflow sub-agent **cannot nest another Workflow** — so the council is run **once, at the top level** by whoever invokes `/llm-council`. Don't try to launch a council from inside a council member. - Keep the script deterministic: never add `Date.now()`, `Math.random()`, or shuffle the labels. If you want a different seat order, edit the static `SEATS` array. - After the Workflow returns, present the president's verdict to the user as-is (it already carries the dissent). You may add a one-line French recap per R-STYLE if the project is French-only. ## Worked example **Decision:** *"Should the three client apps share one monorepo, or stay as three separate repos?"* **Stage 1 — independent answers (sketch):** - *Opus 5* → Monorepo: atomic cross-app refactors, one CI, shared design system; flags tooling cost. - *Sonnet 4.6* → Polyrepo: independent deploy cadences and blast-radius isolation; flags drift. - *Haiku 4.5* → "Depends on team size; under ~6 devs, monorepo wins on overhead." (terse contrarian) - *Fable 5* → Monorepo with enforced package boundaries; warns the real risk is CI scaling, not layout. **Stage 2 — anonymized peer-review (sketch):** Each member ranks the other three as Response A/B/C **without knowing which model wrote which**. Several independently rank the boundary-enforced-monorepo answer top on completeness, and flag the bare polyrepo answer as under-justified on the cross-app refactor cost — a blind convergence, not a name-following one. **Stage 3 — president verdict (sketch):** ``` ## Verdict Adopt a monorepo with enforced package boundaries and per-app deploy pipelines. ## Why Three of four members, ranked blind, favored the monorepo for atomic cross-app changes and a shared design system; the boundary-enforcement answer was the most complete and addressed the strongest counter-point (deploy isolation) directly. ## Where the council disagreed One member argued for polyrepo on deploy-isolation grounds; the council judged that recoverable via per-app pipelines inside the monorepo, but it remains the real risk if CI ownership is weak — revisit if the team grows past ~15 devs or CI times balloon. ## Confidence Medium — would rise to High given the team size and current CI duration. ``` This is the value: the dissent ("polyrepo for isolation") is **preserved as a tracked risk**, not silently dropped — and the convergence happened **blind**, so it isn't an artifact of model prestige.