skill-tracker

skill-tracker

Claude Code plugin that automatically tracks skill usage and provides analytics.

What it tracks

• Skill name and invocation timestamps
• Execution duration
• Token usage (input, output, cache read, cache creation)
• Project directory (for per-project filtering)
• Session ID (for per-session filtering)

Installation

/plugin marketplace add L1nusB/skill-tracker
/plugin install skill-tracker@skill-tracker

Usage

After installation, tracking happens automatically via hooks. Use the /skill-stats command to view analytics:

/skill-stats                          # Global stats
/skill-stats --project /path/to/repo  # Per-project stats
/skill-stats --session abc123         # Per-session stats
/skill-stats --since 2026-03-01       # Since date
/skill-stats --format json            # JSON output

Data location

All data is stored in ~/.claude/skill-tracker/logs/:

• skill-usage.jsonl — detailed recent entries
• skill-summary.json — compacted historical aggregates

Compaction

Logs are automatically compacted on session end:

• Entries older than 30 days are aggregated into skill-summary.json
• If the log file exceeds 5MB, oldest entries are compacted first

Security

• No prompt text is logged
• All hook inputs are sanitized before use in file paths
• Transcript paths are validated before reading
• Data is stored locally only