/history

Show historical context window usage data from previous sessions.

1. Check for Log Files Look for context usage logs in:

   • ~/.claude/context-logs/usage.jsonl
   • ~/.claude/context-logs/sessions.log
   • ~/.claude/logs/ directory

2. Display Historical Data If logs exist, show:

   • Last 10 sessions with token usage
   • Average tokens used per session
   • Peak usage sessions
   • Usage trends over time

3. Current vs Historical Compare current session to:

   • Your personal average
   • Typical usage patterns
   • Outliers or unusual sessions

4. Insights

   • Days/times with highest usage
   • Common context consumers
   • Session duration patterns
   • Optimization effectiveness

5. Visualize Trends Create a simple ASCII chart showing usage over time:

   Token Usage Over Last 10 Sessions
   200K ┤     ╭─╮
   150K ┤   ╭─╯ ╰╮
   100K ┤ ╭─╯    ╰─╮
    50K ┤─╯        ╰─
     0K ┴─────────────
        1  2  3  4  5  6  7  8  9  10
   

If no historical data exists, explain:

• How to enable logging via hooks
• Where logs are stored
• How to set up automatic tracking

Be informative about what data is available and what insights can be derived.