session-report

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

INSTALLATION
npx skills add https://github.com/anthropics/claude-plugins-official --skill session-report
Run in your project or agent environment. Adjust flags if your CLI version differs.

SKILL.md

$27

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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 <!-- AGENT: anomalies --> block with 3–5 one-line findings. Express figures as a % of total tokens wherever possible (total = overall.input_tokens.total + overall.output_tokens). One line per finding, exact markup:
<div class="take bad"><div class="fig">41.2%</div><div class="txt"><b>cc-monitor</b> consumed 41% of the week across just 3 sessions</div></div>

Classes: .take bad for waste/anomalies (red), .take good for healthy signals (green), .take info for neutral facts (blue). The .fig is one short number (a %, a count, or a multiplier like 12×). The .txt is one plain-English sentence naming the project/skill/prompt; wrap the subject in <b>. 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.

  • Fill the <!-- AGENT: optimizations --> block (at the bottom of the page) with 1–4 <div class="callout"> suggestions tied to specific rows (e.g. "/weekly-status spawned 7 subagents for 8.1% of total — scope it to fewer parallel agents").
  • Do not restructure existing sections.

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Report the saved file path to the user. Do not open it or render it.

Notes

  • The template is the source of interactivity (sorting, expand/collapse, block-char bars). Your job is data + narrative, not markup.
  • Keep commentary terse and specific — reference actual project names, numbers, timestamps from the JSON.
  • top_prompts already includes subagent tokens and rolls task-notification continuations into the originating prompt.
  • If the JSON is >2MB, trim top_prompts to 100 entries and cache_breaks to 100 before embedding (they should already be capped).
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