The initial instinct when engineering multi-agent systems is to delegate aggressively. Developers spawn an agent to explore, an agent to plan, an agent to write code, and three cascading agents to conduct reviews. The empirical result in production is almost invariably identical: context degradation, explosive token consumption, and catastrophic latency.

In mission-critical autonomous environments, direct execution by the primary coordinator must remain the default. Subagent dispatch is justified exclusively when a task can be partitioned into an independent, bounded, and deterministically verifiable unit of work.

// Minimal Context Dispatch Contract
interface AgentDispatchSpec {
  role: string;
  scope: string[];       // Strict file or resource bounds
  maxRounds: number;     // Hard upper ceiling
  aggregateBudget: {
    maxTokens: number;
    timeoutSeconds: number;
  };
  expectedEvidence: string; // Verifiable proof criteria
}

The Noise Amplification Theorem

When we pass an entire conversational history to a secondary agent, we do not provide helpful context; we inject accumulated premises, speculative hypotheses, and subtle cognitive bias.

The principle of minimal context dictates that each delegated node should receive only the exact slice of data and files required to formulate a verdict. Furthermore, the coordinator must consume only the child’s structured evidence and findings—never its raw chain-of-thought or entire transcript.

Verification Over Consensus

Voting mechanisms across multiple LLMs are frequently mistaken for verification. Running three identical models to achieve consensus does not eliminate shared systematic failure modes; it merely triples compute costs.

Rigorous systems substitute model consensus with deterministic gates:

1. Static Analysis & Compilers: A change either compiles without warnings or it fails.
2. Deterministic Tests: Test suites executed in sandboxed containers provide immutable ground truth.
3. Evidence Preflights: Before any merge or state change, the cryptographic hash of the reviewed payload must be verified.

Architecture is not the addition of components, but the disciplined elimination of everything that does not contribute to verifiable correctness.