Improve Codebase Architecture

Surface architectural friction and propose deepening opportunities — refactors that turn shallow modules into deep ones. The aim is testability and AI-navigability.

This command is informed by the project's domain model and design-vocabulary.md — use those terms exactly in every suggestion.

The domain language in CONTEXT.md gives names to good seams; ADRs in docs/adr/ record decisions this command should not re-litigate.

Process

1. Graph check (optional)

architecture_health flows run a graph_build phase first (phases.py). If you arrive here without a graph, check for graphify-out/graph.json:

• If graphify-out/graph.json exists, tell the user: "代码图谱已就绪（N 个模块），将基于图谱做增强分析。" Then query /code-graph query god-nodes and /code-graph query communities to get the global view. Query specific modules as needed via /code-graph query.
• If no graph exists, tell the user: "未检测到代码图谱，使用有机探索模式。如需更精确的分析，可先运行 /code-graph build（需要先安装 graphify）。" Then fall back to organic exploration.

2. Multi-modal sweep