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session-report

session-report is a skill for Claude Code, Codex from anthropics/claude-plugins-official. It costs 34 tokens per session (799 once invoked), scanned A, original, Apache-2.0.

A self-contained HTML report of Claude Code session usage, including tokens, cached context, subagents, skills, and expensive prompts. It reads session transcripts and presents the results in tables, charts, and drill-down views.

In plain words
What is it for?
Use it to review usage over a selected time range, compare projects or skills, and investigate unusual activity or costly prompts.
Why use it?
It makes large amounts of session history easier to inspect than raw transcript files.

Skill for Claude CodeCodex ✓ vendor

Written for no agent in particular: nothing here depends on one. Also seen: reads .claude/ paths; mentions subagents; mentions Claude Code.

not rated 44krepo +4.6k today A scan Socket: passSnyk: passSkillSpector: pass 34 tokens original Apache-2.0

Good fit Use it to review usage over a selected time range, compare projects or skills, and investigate unusual activity or costly prompts.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/anthropics/claude-plugins-official/session-report
View source ↗ anthropics/claude-plugins-official code.claude.com
About the project

Claude Code Plugins Directory is a marketplace containing plugins for Claude Code, including tools, commands, skills, agents, hooks, and model context servers. Claude Code users browse it to install Anthropic-maintained or approved third-party extensions.

anthropics/claude-plugins-official · 43,634 stars · on GitHub · code.claude.com

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add anthropics/claude-plugins-official --skill session-report
Clone the repo
git clone --depth 1 https://github.com/anthropics/claude-plugins-official

Made for: Claude Code, Codex.

Its marketplace also offers this one on its own, as the plugin session-report — /plugin install session-report after adding the marketplace above.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for session-report

README.md
[![agentmods](https://agentmods.dev/badge/skills/anthropics/claude-plugins-official/session-report/github.svg)](https://agentmods.dev/skills/anthropics/claude-plugins-official/session-report)
Your own site
<a href="https://agentmods.dev/skills/anthropics/claude-plugins-official/session-report"><img src="https://agentmods.dev/badge/skills/anthropics/claude-plugins-official/session-report/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for session-report

Your own site · 80×15
<a href="https://agentmods.dev/skills/anthropics/claude-plugins-official/session-report"><img src="https://agentmods.dev/badge/skills/anthropics/claude-plugins-official/session-report.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 34 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 799 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • Socket pass 14 Sept 2026
  • Snyk pass 14 Sept 2026
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00034 $0.00799
Opus 5.5 $0.00014 $0.00320
Sonnet 5.5 $0.00007 $0.00160
Haiku 4.5 $0.00003 $0.00080

Measured 1mo ago against content hash ef0fbc4259a4, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

session-report scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

The scan reads SKILL.md. This mod also ships 1 executable file (analyze-sessions.mjs), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

Copies of this mod

6 near-identical copies found in the catalogue:

plugins/session-report/skills/session-report/SKILL.md · 43 lines

How it starts

The opening of the file, as written. The whole thing — 43 lines — stays where its author put it; the contents beside it link to each section on GitHub.

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 <!-- 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.

Read the full file on GitHub · 43 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 1mo ago First seen · 43 lines · 34 tokens per session scan A ef0fbc4259a4

Subscribe to this mod's changes

session-report is a skill published in the GitHub repository anthropics/claude-plugins-official (43,634 stars, last pushed today), licensed Apache-2.0. It adds 34 tokens to every session and 799 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

Analytics and metricsClaude Codemcpskills
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