What is session-report?

A tool that turns Claude Code session records into a self-contained HTML report showing usage information such as tokens, cached data, subagents, skills, and costly prompts.

Use it to review recent or all-time Claude Code activity by project, subagent type, skill, cache breaks, and frequently expensive prompts.

It gives you a browsable way to inspect how sessions consume resources and where usage is concentrated over a chosen time period.

session-report — Skill by initxy

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.

agentmods

npx agentmods add skills/initxy/noeta/session-report

Any agent

npx skills add initxy/noeta --skill session-report

Clone the repo

git clone --depth 1 https://github.com/initxy/noeta

Made for: Claude Code, Codex.

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. Scan, not verified.

Origin 100% copy Near-identical to another mod 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.

Model	Per session	Once invoked
Fable 5	$0.00034	$0.00799
Opus 5	$0.00017	$0.00400
Sonnet 5	$0.00007	$0.00160
Haiku 4.5	$0.00003	$0.00080

Measured 3d ago against content hash ef0fbc4259a4, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, 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 3d 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

This is a copy

100% identical to session-report — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

tests/fixtures/oss_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

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

3d 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 initxy/noeta (9 stars, last pushed 5d ago), licensed Apache-2.0. It adds 34 tokens to every session and 799 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to session-report, differing in 0 lines, and is treated as a copy.

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