# GitNexus — Code Intelligence 使用指南

> **项目索引**: rui-framework (2690 symbols, 5387 relationships, 218 execution flows)

## 基本概念

GitNexus 是一个代码智能工具，通过索引代码库构建知识图谱，帮助开发者理解代码、评估影响、安全导航。

## 核心原则

### Always Do

- **MUST run impact analysis before editing any symbol.** Before modifying a function, class, or method, run `gitnexus_impact({target: "symbolName", direction: "upstream"})` and report the blast radius (direct callers, affected processes, risk level) to the user.
- **MUST run `gitnexus_detect_changes()` before committing** to verify your changes only affect expected symbols and execution flows.
- **MUST warn the user** if impact analysis returns HIGH or CRITICAL risk before proceeding with edits.
- When exploring unfamiliar code, use `gitnexus_query({query: "concept"})` to find execution flows instead of grepping. It returns process-grouped results ranked by relevance.
- When you need full context on a specific symbol — callers, callees, which execution flows it participates in — use `gitnexus_context({name: "symbolName"})`.

### Never Do

- NEVER edit a function, class, or method without first running `gitnexus_impact` on it.
- NEVER ignore HIGH or CRITICAL risk warnings from impact analysis.
- NEVER rename symbols with find-and-replace — use `gitnexus_rename` which understands the call graph.
- NEVER commit changes without running `gitnexus_detect_changes()` to check affected scope.

## 资源速查

| Resource | Use for |
|----------|---------|
| `gitnexus://repo/rui-framework/context` | Codebase overview, check index freshness |
| `gitnexus://repo/rui-framework/clusters` | All functional areas |
| `gitnexus://repo/rui-framework/processes` | All execution flows |
| `gitnexus://repo/rui-framework/process/{name}` | Step-by-step execution trace |

## 技能参考

| 场景 | 技能文件 |
|------|---------|
| 架构理解 / "How does X work?" | `.claude/skills/gitnexus/gitnexus-exploring/SKILL.md` |
| 影响分析 / "What breaks if I change X?" | `.claude/skills/gitnexus/gitnexus-impact-analysis/SKILL.md` |
| Bug 追踪 / "Why is X failing?" | `.claude/skills/gitnexus/gitnexus-debugging/SKILL.md` |
| 重构 / "Rename this function" | `.claude/skills/gitnexus/gitnexus-refactoring/SKILL.md` |
| 工具参考 | `.claude/skills/gitnexus/gitnexus-guide/SKILL.md` |
| CLI 命令 | `.claude/skills/gitnexus/gitnexus-cli/SKILL.md` |

## 索引维护

如果 GitNexus 工具提示索引过期，执行：

```bash
npx gitnexus analyze
```