index-regenerator

name	index-regenerator
description	Regenerates INDEX.md to reflect current file structure. Trigger when user says "update index", "regenerate index", after adding/removing files, or when INDEX.md shows stale counts. Provides more control than the PostToolUse hook which runs automatically.
allowed-tools	Read, Glob, Bash, Write

Index Regenerator

Maintain INDEX.md as accurate reflection of repository structure.

When to Activate

• User says "update index", "regenerate index"
• After batch adding/removing files
• When INDEX.md counts appear stale

Skip when: Single file change (PostToolUse hook handles it)

Steps

1. Glob all markdown files (exclude hidden dirs, node_modules)
2. Group by directory, count per directory
3. Generate INDEX.md with timestamp and summary table
4. Report changes from previous version

INDEX.md Format

# Index
*Auto-generated: YYYY-MM-DD HH:MM*

## Summary
**Total documents**: N

| Directory | Count |
|-----------|-------|
| patterns | X |
| skills | Y |

## [Category]
- [file.md](path/to/file.md)

Output

## Index Regenerated

**Timestamp**: [date]
**Total Files**: [N]

### Changes
- Added: [files]
- Removed: [files]

Don't

• Include hidden files or node_modules
• Break existing link formats
• Remove manually-added sections