Claude-Code-VS-OpenCode

fix Mermaid rendering: bundle library locally instead of CDN loader (blocked in China), rewrite init script for mdBook SPA navigation

rewrite Chapter 12 (ZH): accessible language, 86 Mermaid diagrams, file info boxes — 8 sections, +1962 lines

add Mermaid.js diagrams: 9 interactive diagrams across 18 files (EN+ZH) — ReAct loop, Zod chain, compaction strategies, MCP architecture, OMO 3-layer orchestration, plugin bootstrap sequence, CC sub-agent system, orchestration comparison, Harness dimensions

add three major improvements: Skill system deep dive (16.2), Harness Engineering integration (1.3+20.1), Claude Code sub-agent architecture (11.6+15.1) — EN+ZH, 10 files, +1028 lines