agent-council 0.2.0

Config-driven multi-agent debate council — add a reliability layer to any LLM pipeline

agent-council

A reliability layer for LLM pipelines. Multiple agents with distinct personas debate a topic across iterative rounds; a judge synthesizes a final verdict.

Drop it into any agent to pressure-test a decision before committing to it.

Inspired by mshumer/llmcouncil and the Mixture of Agents research.

---

Install

pip install agent-council

Requires Python ≥ 3.11.

---

Programmatic usage

This is the primary interface — use it inside your own agents and pipelines.

from agent_council import CouncilOrchestrator, MemberConfig, JudgeConfig

orchestrator = CouncilOrchestrator(
    members=[
        MemberConfig(
            id="analyst",
            name="The Analyst",
            provider="anthropic",
            model="claude-sonnet-4-6",
            persona="Rigorous analytical thinker. Evidence-based, structured.",
        ),
        MemberConfig(
            id="skeptic",
            name="The Skeptic",
            provider="openai",
            model="gpt-4o",
            persona="Challenge every assumption. Surface hidden risks.",
        ),
    ],
    judge=JudgeConfig(provider="anthropic", model="claude-opus-4-6"),
    rounds=3,
    early_exit_threshold=0.85,
)

session, verdict = await orchestrator.run("Should we adopt microservices?")

print(verdict.verdict)           # synthesized conclusion
print(verdict.consensus_level)   # ConsensusLevel.STRONG / MODERATE / WEAK / NONE
print(verdict.consensus_score)   # float 0–1
print(verdict.key_agreements)    # list[str]
print(verdict.dissenting_views)  # list[str]

API keys are read from environment variables (ANTHROPIC_API_KEY, OPENAI_API_KEY) by default.

Streaming callbacks

Callbacks fire as each member finishes — no waiting for a full round to complete. Both sync and async callbacks are supported.

def on_member(resp):
    print(f"[{resp.member_name}] {resp.stance} ({resp.confidence:.0%} confident)")

async def on_round(round_):
    await db.save_round(round_)   # async is fine too

session, verdict = await orchestrator.run(
    "Should we rewrite in Rust?",
    on_member_response=on_member,
    on_round_complete=on_round,
)

Provider overrides

Override temperature, token limits, or use a custom Ollama endpoint:

from agent_council import (
    CouncilOrchestrator, MemberConfig, JudgeConfig,
    ProvidersConfig, AnthropicProviderConfig, OllamaProviderConfig,
)

orchestrator = CouncilOrchestrator(
    members=[...],
    judge=JudgeConfig(provider="anthropic", model="claude-opus-4-6"),
    provider_configs=ProvidersConfig(
        anthropic=AnthropicProviderConfig(temperature=0.5, max_tokens=1024),
        ollama=OllamaProviderConfig(base_url="http://my-ollama:11434"),
    ),
)

Result types

@dataclass FinalVerdict:
    topic: str
    verdict: str
    consensus_level: ConsensusLevel      # STRONG / MODERATE / WEAK / NONE
    consensus_score: float               # 0–1
    key_agreements: list[str]
    dissenting_views: list[str]
    rounds_completed: int
    early_exit: bool
    total_duration_seconds: float

@dataclass CouncilSession:
    session_id: str
    topic: str
    started_at: datetime
    rounds: list[DebateRound]            # full transcript
    verdict: FinalVerdict | None

@dataclass MemberResponse:
    member_id, member_name, round_number: str / int
    content: str                         # full response text
    stance: str                          # one-line position summary
    confidence: float                    # 0–1
    changed_position: bool

---

Why Reliability

LLMs can be confident and wrong. A single-shot response hides uncertainty and failure modes (hallucinations, missed trade‑offs, overfitting to prompt). Agent Council creates informed disagreement and then reconciles it:

• Independent agents surface blind spots and competing views.
• Iterative rounds reward stable, consistent positions (consensus score).
• A neutral judge synthesizes agreements and dissent for transparent decision‑making.

What improves:

• Decision quality: fewer unexamined assumptions, clearer trade‑offs.
• Traceability: full transcript and structured verdict for audits/reviews.
• Safety: configurable early exit threshold to avoid premature consensus.
• Extensibility: mix providers/models (Anthropic, OpenAI, OpenRouter, Ollama).

---

Examples & Use Cases

• Architecture choices: “Monolith vs microservices for product X?”
• Launch reviews: “Are we production‑ready? What risks remain?”
• AI safety checks: “Could this prompt produce unsafe output?”
• Product strategy: “Should pricing move to usage‑based?”
• Code migration: “Rewrite to Rust? What are the costs/benefits?”

Programmatic snippet (minimal):

session, verdict = await CouncilOrchestrator(
    members=[
        MemberConfig(id="analyst", name="Analyst", provider="openrouter", model="anthropic/claude-3.5-sonnet"),
        MemberConfig(id="skeptic", name="Skeptic", provider="openrouter", model="openai/gpt-4o"),
    ],
    judge=JudgeConfig(provider="openrouter", model="anthropic/claude-3.5-sonnet"),
).run("Should we adopt microservices?")
print(verdict.verdict)

CLI:

export OPENROUTER_API_KEY=sk-or-...
council review "Remote work vs office?" -c config/council.yaml

HTTP (server):

pip install "agent-council[server]"
council serve
# POST http://127.0.0.1:8000/review {"topic":"Should we rewrite in Rust?"}

---

How the debate works

Round 1 — all members respond independently to the topic
Round 2..N — each member reads all peers' responses and may revise
             → early exit if consensus score ≥ threshold
Judge — reads full transcript, synthesizes final verdict

Consensus score = avg_confidence × (1 − changed_fraction) Rewards both high confidence and stability across rounds.

---

Adding a provider

Implement BaseModelAdapter (one method) and register it in the factory:

# agent_council/adapters/my_provider.py
from agent_council.adapters.base import BaseModelAdapter

class MyProviderAdapter(BaseModelAdapter):
    async def complete(self, system: str, user: str) -> str:
        # call your model here
        ...

# agent_council/adapters/__init__.py — add to build_adapter()
case "myprovider":
    return MyProviderAdapter(member_cfg, provider_cfg)

---

Config file (optional)

For teams who prefer YAML over code:

# config/council.yaml
council:
  debate_rounds: 3
  early_exit_threshold: 0.85

members:
  - id: "analyst"
    name: "The Analyst"
    provider: "anthropic"
    model: "claude-sonnet-4-6"
    persona: "Rigorous analytical thinker."

  - id: "skeptic"
    name: "The Skeptic"
    provider: "openai"
    model: "gpt-4o"
    persona: "Challenge every assumption."

judge:
  provider: "anthropic"
  model: "claude-opus-4-6"

providers:
  # Optional: use OpenRouter with OpenAI-compatible models
  openrouter:
    api_key_env: "OPENROUTER_API_KEY"
    base_url: "https://openrouter.ai/api/v1"
    max_tokens: 2048
    temperature: 0.7

orchestrator = CouncilOrchestrator.from_config_file("config/council.yaml")

---

CLI (convenience)

# Install with CLI support (included by default)
pip install agent-council

export ANTHROPIC_API_KEY=sk-ant-...
council review "Is Python the best language for data science?"
council review "Should we rewrite in Rust?" --config config/council.yaml
council review "Remote work vs office?" --no-rounds

---

HTTP server (optional)

pip install "agent-council[server]"
council serve                       # http://127.0.0.1:8000

Method	Path	Description
GET	/health	Liveness check
POST	/review	Run debate, return full JSON result
POST	/review/stream	Run debate, stream events via SSE

Interactive docs at http://localhost:8000/docs.

SSE event stream (POST /review/stream):

data: {"event": "member_response", "data": {...}}
data: {"event": "round_complete",  "data": {"round_number": 1, "consensus_score": 0.62}}
data: {"event": "verdict",         "data": {...}}

---

Tracing

Enable JSON traces to inspect every response, round, and the final verdict. Two ways:

1. Programmatic recorder

from agent_council.tracing import TraceRecorder

rec = TraceRecorder()
session, verdict = await orchestrator.run("Your topic", trace=rec)
path = rec.save("traces/")
print("Trace saved to", path)

2. Build a trace from a finished session

from agent_council.tracing import TraceRecorder
rec = TraceRecorder.from_session(session, verdict)
rec.save("traces/")

Each trace is a single JSON file containing per-member responses, round summaries, and the final verdict.

---

Budget Awareness (optional)

Control spend with a simple per‑call budget guard. Set these env vars:

• COUNCIL_COST_PER_CALL_USD — estimated cost charged per model call.
• COUNCIL_MAX_BUDGET_USD — cap for the whole run; if exceeded and COUNCIL_BUDGET_HARD_STOP is true (default), the run stops.
• COUNCIL_BUDGET_HARD_STOP — set 0/false for soft cap.

This wraps each provider adapter and enforces the budget before calling the model. For precise accounting, plug in your own adapter with exact token‑based pricing.

---

Project layout

agent_council/
├── __init__.py          # public API
├── orchestrator.py      # CouncilOrchestrator — primary entry point
├── member.py            # prompt construction + JSON parsing
├── debate.py            # round loop + consensus scoring
├── judge.py             # synthesis + FinalVerdict
├── config.py            # Pydantic config schema
├── types.py             # result dataclasses
├── server.py            # FastAPI app (optional)
└── adapters/
    ├── base.py
    ├── anthropic_adapter.py
    ├── openai_adapter.py
    └── ollama_adapter.py

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License

MIT