---
Auto-compute derived metadata like word count, link count, and reading time from note content. Use when users want analytics fields, track note complexity, or add timestamps to frontmatter.
/plugin marketplace add bencassie/flywheel/plugin install flywheel@flywheelThis skill inherits all available tools. When active, it can use any tool Claude has access to.
Auto-compute derived fields from note content. Generates metadata like word count, link count, and reading time.
Invoke when you want to:
| Field | Description | Example |
|---|---|---|
| word_count | Words in note body | 1523 |
| link_count | Outgoing wikilinks | 24 |
| backlink_count | Incoming links | 15 |
| tag_count | Number of tags | 5 |
| reading_time | Estimated read time | "8 min" |
| created | File creation date | "2025-01-03" |
| last_updated | File modification date | "2025-01-03" |
| Argument | Required | Description |
|---|---|---|
| path | Yes | Note to compute fields for |
| fields | No | Specific fields to compute (default: all) |
Recognize computation requests:
mcp__flywheel__compute_frontmatter({
path: "projects/Phoenix.md",
fields: ["word_count", "link_count", "reading_time"]
})
## Computed Frontmatter
For: projects/Phoenix.md
| Field | Value | Method |
|-------|-------|--------|
| word_count | 1523 | Prose word count |
| link_count | 24 | Outgoing wikilinks |
| backlink_count | 15 | Incoming links |
| reading_time | "8 min" | word_count / 200 |
### Suggested YAML
```yaml
word_count: 1523
link_count: 24
backlink_count: 15
reading_time: "8 min"
Add these to frontmatter? (y/n)
### 4. Apply Changes (with confirmation)
If user confirms:
1. Read current file content
2. Use Edit to add computed fields to frontmatter
3. **Verify the changes**:
- Re-read the file after Edit
- Check if computed fields are present
- If Edit is blocked or failed: Inform user "Edit failed - please add fields manually"
- If fields not found: Alert user "Fields may not have been added"
- If succeeded: Only report success if verification confirms fields present
## Six Gates Compliance
| Gate | Implementation |
|------|----------------|
| 1. Read Before Write | compute_frontmatter reads file first |
| 2. File Exists | Validates path before computation |
| 3. Chain Validation | N/A (single step) |
| 4. Mutation Confirmation | Shows preview, requires confirmation |
| 5. Health Check | Uses MCP health infrastructure |
| 6. Post Validation | Re-reads file after Edit, verifies fields present |
## Use Cases
- **Content analytics**: "How long are my notes?"
- **Complexity tracking**: "Which notes have many links?"
- **Reading estimates**: "Add reading time to blog posts"
- **Timestamp management**: "Update last_updated field"
## Integration
Works well with other skills:
- **schema-infer**: See if computed fields are common
- **vault-search**: Query by computed values
- **schema-apply**: Add to batch operations
---
**Version:** 1.0.0
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