Function buildDefaultPlan

Creates a sensible default RetrievalPlan for a given strategy level.

This is the canonical way to construct a plan when the classifier does not produce a full plan (e.g., legacy tier-based classification, heuristic mode, or fallback scenarios).

Strategy defaults:

• none: All sources disabled, no HyDE, no memory, no research.
• simple: Vector + BM25 + memory (episodic, semantic). No HyDE.
• moderate: All sources enabled. HyDE with 1 hypothesis. Memory with episodic + semantic. RAPTOR layers 0-1. Graph depth 2.
• complex: All sources enabled. HyDE with 3 hypotheses. Full memory. Deep research. RAPTOR all layers. Graph depth 3.

Example

// Simple plan with defaults
const plan = buildDefaultPlan('moderate');

// Complex plan with custom temporal preferences
const plan = buildDefaultPlan('complex', {
  temporal: { preferRecent: true, recencyBoost: 1.5, maxAgeMs: 86_400_000 },
});
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