agent-orchestration

# Agent Orchestration

Comprehensive patterns for building and coordinating AI agents -- from single-agent reasoning loops to multi-agent systems and framework selection. Coordination and multi-scenario categories have individual rule files in `rules/` loaded on-demand; loop and framework tutorials live upstream (see [Upstream coverage](#upstream-coverage-do-not-restate)), with house defaults in `references/ork-delta.md`.

> **CC native `/workflows` (2.1.154):** Claude Code now ships *dynamic workflows* — ask Claude to create a workflow and it orchestrates tens-to-hundreds of agents in the background; view runs with `/workflows`. This is **complementary** to the patterns here: use CC `/workflows` for large-scale, fire-and-forget **background** fan-out (you check back later); use the bounded **foreground** Agent Teams / Task-tool patterns below when ≤8 agents must coordinate within a single skill invocation via shared memory (handoff files, mesh messaging). Different scale, not a replacement.
>
> **Ask only when genuinely blocked (CC 2.1.154):** CC now reserves the multiple-choice question prompt for decisions it genuinely cannot make itself, rather than asking when it already has enough context to proceed. When orchestrating agents, don't gate progress on an `AskUserQuestion` the lead can resolve from available context — reserve prompts for true branch points (irreversible actions, missing requirements). This complements ork's voice-friendly decision guidance.

## Quick Reference

| Category | Rules | Impact | When to Use |
|----------|-------|--------|-------------|
| [Agent Loops](#agent-loops) | upstream | HIGH | ReAct reasoning, plan-and-execute, self-correction |
| [Multi-Agent Coordination](#multi-agent-coordination) | 2 | CRITICAL | Supervisor routing, agent debate, result synthesis |
| [Alternative Frameworks](#alternative-frameworks) | upstream | HIGH | CrewAI crews, AutoGen teams, framework comparison |
| [Multi-Scenario](#multi-scenario) | 2 | MEDIUM | Parallel scenario orchestration, difficulty routing |

**Total: 4 rules across 4 categories.** Loop and framework tutorials moved to first-party sources; the rescued house defaults live in `references/ork-delta.md`.

## Quick Start

```python
# ReAct agent loop
async def react_loop(question: str, tools: dict, max_steps: int = 10) -> str:
    history = REACT_PROMPT.format(tools=list(tools.keys()), question=question)
    for step in range(max_steps):
        response = await llm.chat([{"role": "user", "content": history}])
        if "Final Answer:" in response.content:
            return response.content.split("Final Answer:")[-1].strip()
        if "Action:" in response.content:
            action = parse_action(response.content)
            result = await tools[action.name](*action.args)
            history += f"\nObservation: {result}\n"
    return "Max steps reached without answer"
```

```python
# Supervisor with fan-out/fan-in
async def multi_agent_analysis(content: str) -> dict:
    agents = [("security", security_agent), ("perf", perf_agent)]
    tasks = [agent(content) for _, agent in agents]
    results = await asyncio.gather(*tasks, return_exceptions=True)
    return await synthesize_findings(results)
```

## Agent Loops

Patterns for autonomous LLM reasoning: ReAct (Reasoning + Acting), Plan-and-Execute with replanning, self-correction loops, and sliding-window memory management.

**Key decisions:** Max steps 5-15, temperature 0.3-0.7, memory window 10-20 messages.

## Multi-Agent Coordination

Fan-out/fan-in parallelism, supervisor routing with dependency ordering, conflict resolution (confidence-based or LLM arbitration), result synthesis, and CC Agent Teams (mesh topology for peer messaging in CC 2.1.33+).

**Key decisions:** 3-8 specialists, parallelize independent agents, use Task tool (star) for simple work, Agent Teams (mesh) for cross-cutting concerns.

## Alternative Frameworks

CrewAI hierarchical crews with Flows (1.8+), OpenAI Agents SDK handoffs and guardrails (0.12+), Microsoft Agent Framework (AutoGen + SK merger), GPT-5.2-Codex for long-horizon coding, and AG2 for open-source flexibility.

**Key decisions:** Match framework to team expertise + use case. LangGraph for state machines, CrewAI for role-based teams, OpenAI SDK for handoff workflows, MS Agent for enterprise compliance.

## Multi-Scenario

Orchestrate a single skill across 3 parallel scenarios (simple/medium/complex) with progressive difficulty scaling (1x/3x/8x), milestone synchronization, and cross-scenario result aggregation.

**Key decisions:** Free-running with checkpoints, always 3 scenarios, 1x/3x/8x exponential scaling, 30s/90s/300s time budgets.

## Upstream coverage (do not restate)

Local tutorials for these topics were retired; consult the first-party source and keep only house deltas in `references/ork-delta.md`.

| Topic | First-party source |
|-------|--------------------|
| ReAct / plan-and-execute / self-correction loop implementations | OpenAI function calling guide (https://platform.openai.com/docs/guides/function-calling); LangGraph tutorials (context7: /langchain-ai/langgraph) |
| Fan-out coordination, result-synthesis boilerplate, and the generic multi-agent design checklist | Python asyncio docs (https://docs.python.org/3/library/asyncio-task.html); Anthropic "Building effective agents" (https://www.anthropic.com/research/building-effective-agents); `ork:langgraph` supervisor patterns |
| CrewAI (crews, Flows, MCP tools, guardrails) | CrewAI docs (https://docs.crewai.com); context7: /crewaiinc/crewai |
| OpenAI Agents SDK (handoffs, sessions, guardrails, MCP) | https://openai.github.io/openai-agents-python/ ; context7: /openai/openai-agents-python |
| Microsoft Agent Framework / AutoGen (teams, termination, A2A) | https://learn.microsoft.com/en-us/agent-framework/ ; context7: /microsoft/autogen |
| GPT-5.2-Codex capabilities, pricing, IDE integrations | OpenAI model docs (https://platform.openai.com/docs/models) |
| Mu