Pss Authoring

PSS Authoring Best Practices

Overview

Guidance for writing skills that PSS discovers effectively, maintaining index health, and interpreting suggestions accurately. Complements pss-usage (core commands and workflows).

Prerequisites

• PSS plugin installed and enabled
• Familiarity with SKILL.md frontmatter format
• Index built via /pss-reindex-skills

Instructions

1. Add proper frontmatter to your SKILL.md (name, description, categories, keywords)
2. Choose keywords that match how users naturally phrase requests
3. Select 1-2 categories from the 16 standard options
4. Reindex after any metadata changes
5. Use /pss-status to verify index health regularly

Checklist

Copy this checklist and track your progress:

• Frontmatter includes name, description, categories, keywords
• Keywords match natural user phrasing
• Categories selected from standard list
• Index rebuilt after changes (/pss-reindex-skills)
• Suggestion quality verified with test prompts

How PSS Indexes Your Skills

The canonical index is a CozoDB store (pss-skill-index.db), not the legacy skill-index.json file. What authoring-side reindexing actually does:

1. pss_discover.py walks user / project / plugin / marketplace directories and emits one JSONL line per element.
2. The Rust binary's --pass1-batch mode reads that JSONL and enriches each line with deterministic keywords, intents, categories, domains, languages, and frameworks.
3. pss_merge_queue.py writes the enriched rows directly into CozoDB via pycozo[embedded] under an fcntl lock, preserving each entry's original first_indexed_at timestamp across rebuilds.

Python is the sole writer; the Rust --build-db flag has been removed. skill-index.json is no longer auto-generated — run pss export --json on demand if you want a diffable snapshot for code review. Nothing about authoring your SKILL.md changes: frontmatter rules, keyword selection, and category choices remain unchanged.

References

• Best Practices
  • When to reindex your skill index
    • Events that always require reindexing
    • Events that may not require reindexing
  • Interpreting PSS skill suggestions accurately
    • Trusting confidence levels: HIGH, MEDIUM, LOW
    • Reading evidence types: intent, keyword, co_usage
    • Evaluating suggestions with multiple evidence types
  • Maintaining index health over time
    • Regular health checks with /pss-status
    • Keeping skill metadata current
    • Periodic clean rebuilds of the index
• Skill Authoring Tips
  • Making your skills discoverable by PSS
    • Essential frontmatter fields for PSS indexing
    • Choosing effective keywords that match user prompts
    • Selecting accurate categories from the 16 standard options
  • Improving suggestion quality for your skills
    • Writing descriptions that help PSS match intent
    • Including tool and action keywords
    • Leveraging co-usage relationships automatically
  • Reference: Standard categories list

Output

Improved skill metadata and index quality. Skills with proper frontmatter appear in PSS suggestions with higher confidence.

Error Handling

• Skills not appearing: Check frontmatter has keywords and categories
• Low confidence: Improve description specificity and keyword coverage
• Stale suggestions: Run /pss-reindex-skills after metadata changes

Examples

Input: A skill with generic description "Does testing" Output: Improved to "Use when writing pytest unit tests with fixtures and mocking. Trigger with /python-testing."

Resources

• Standard categories: ${CLAUDE_PLUGIN_ROOT}/schemas/pss-categories.json
• Companion skill: pss-usage (core commands and workflows)