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skills/repo-scan/SKILL.md

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+---
+name: repo-scan
+description: Cross-stack source code asset audit — classifies every file, detects embedded third-party libraries, and delivers actionable four-level verdicts per module with interactive HTML reports.
+origin: https://github.com/haibindev/repo-scan
+tools:
+  - file analysis
+  - dependency detection
+  - HTML report generation
+---
+
+# repo-scan
+
+> Every ecosystem has its own dependency manager, but no tool looks across C++, Android, iOS, and Web to tell you: how much code is actually yours, what's third-party, and what's dead weight.
+
+## When to Activate
+
+- Taking over a large legacy codebase and need a structural overview
+- Before major refactoring — identify what's core, what's duplicate, what's dead
+- Auditing third-party dependencies embedded directly in source (not declared in package managers)
+- Preparing architecture decision records for monorepo reorganization
+
+## Installation
+
+```bash
+# Copy into your Claude Code skills directory
+git clone https://github.com/haibindev/repo-scan.git
+cp -r repo-scan ~/.claude/skills/repo-scan
+```
+
+> Review the source before installing any agent skill.
+
+## Core Capabilities
+
+| Capability | Description |
+|---|---|
+| **Cross-stack scanning** | C/C++, Java/Android, iOS (OC/Swift), Web (TS/JS/Vue) in one pass |
+| **File classification** | Every file tagged as project code, third-party, or build artifact |
+| **Library detection** | 50+ known libraries (FFmpeg, Boost, OpenSSL…) with version extraction |
+| **Four-level verdicts** | Core Asset / Extract & Merge / Rebuild / Deprecate |
+| **HTML reports** | Interactive dark-theme pages with drill-down navigation |
+| **Monorepo support** | Hierarchical scanning with summary + sub-project reports |
+
+## Analysis Depth Levels
+
+| Level | Files Read | Use Case |
+|---|---|---|
+| `fast` | 1-2 per module | Quick inventory of huge directories |
+| `standard` | 2-5 per module | Default audit with full dependency + architecture checks |
+| `deep` | 5-10 per module | Adds thread safety, memory management, API consistency |
+| `full` | All files | Pre-merge comprehensive review |
+
+## Workflow
+
+1. **Scan**: `/repo-scan` runs a pre-scan pass to classify files and detect dependencies
+2. **Analyze**: AI reviews the structured data and assigns verdicts per module
+3. **Report**: Interactive HTML report generated with verdict distribution and drill-down
+
+## Real-World Example
+
+On a 50,000-file C++ monorepo:
+- Found FFmpeg 2.x (2015 vintage) still in production
+- Discovered the same SDK wrapper duplicated 3 times
+- Identified 636 MB of committed Debug/ipch/obj build artifacts
+- Classified: 3 MB project code vs 596 MB third-party
+
+## Best Practices
+
+- Start with `standard` depth for first-time audits
+- Use `fast` for monorepos with 100+ modules to get a quick inventory
+- Run `deep` incrementally on modules flagged for refactoring
+- Review the cross-module analysis for duplicate detection across sub-projects
+
+## Links
+
+- [GitHub Repository](https://github.com/haibindev/repo-scan)