infospace: process book-4-introduction

Extract entities, map to VSM, and synthesize analysis.

examples/infospace-with-history/output/entities/economic-system-standard.md

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+<!-- generated: provider=openrouter model=arcee-ai/trinity-large-preview:free date=2026-02-19 source=book-4-introduction -->
+
+# Economic System Standard
+
+## Definition
+
+The established norms, principles, and practices that define acceptable and effective economic arrangements, including the benchmarks and criteria against which different systems and their components are evaluated and compared.
+
+## Source Chapter
+
+Book IV, Chapter 0
+
+## Context
+
+Smith's framework for understanding political economy implies the importance of standards in economic arrangements and their role in guiding economic practice and evaluation.
+
+## Economic Domain
+
+General Theory
+
+---