session-report

name	session-report
description	Generate an explorable HTML report of Claude Code session usage (tokens, cache, subagents, skills, expensive prompts) from ~/.claude/projects transcripts.

Session Report

Produce a self-contained HTML report of Claude Code usage and save it to the current working directory.

Steps

1. Get data. Run the bundled analyzer (default window: last 7 days; honor a different range if the user passed one, e.g. 24h, 30d, or all). The script analyze-sessions.mjs lives in the same directory as this SKILL.md — use its absolute path:

   node <skill-dir>/analyze-sessions.mjs --json --since 7d > /tmp/session-report.json
   

   For all-time, omit --since.

2. Read /tmp/session-report.json. Skim overall, by_project, by_subagent_type, by_skill, cache_breaks, top_prompts.

3. Copy the template (also bundled alongside this SKILL.md) to the output path in the current working directory:

   cp <skill-dir>/template.html ./session-report-$(date +%Y%m%d-%H%M).html
   

4. Edit the output file (use Edit, not Write — preserve the template's JS/CSS):

   • Replace the contents of <script id="report-data" type="application/json"> with the full JSON from step 1. The page's JS renders the hero total, all tables, bars, and drill-downs from this blob automatically.
   • Fill the block with . Express figures as a wherever possible (total = ). One line per finding, exact markup: Classes: for waste/anomalies (red), for healthy signals (green), for neutral facts (blue). The is one short number (a %, a count, or a multiplier like ). The is one plain-English sentence naming the project/skill/prompt; wrap the subject in . Look for: a project or skill eating a disproportionate share, cache-hit <85%, a single prompt >2% of total, subagent types averaging >1M tokens/call, cache breaks clustering.