Obsidian Auto Tagger

Add useful tags to untagged Obsidian notes while preserving the vault's existing tag vocabulary.

Use This Skill When

• The user points at an Obsidian vault, folder, or note and asks to add missing tags.
• Notes lack frontmatter, lack a tags field, have an empty tags field, or have no inline tags.
• Existing vault tags should be reused before creating new tags.
• Tags should be written as Obsidian-compatible frontmatter tags entries.

Do Not Use

• The user wants to redesign the entire taxonomy from scratch.
• Notes are generated, cache, plugin, template, attachment, or local skill files.
• Existing tags are already maintained and the user has not requested optimization.
• The note topic is too ambiguous to tag confidently.

Workflow