benchmark-analyzer

benchmark-analyzer is a skill for Claude Code from reatlat/fullstory-claude-plugin. It costs 43 tokens per session (1,390 once invoked), scanned A, original, MIT.

A tool for establishing a normal performance level for a metric, setting a target, and comparing later results with that reference. A benchmark gives numbers such as conversion or error rates context over time or against available peers.

In plain words
What is it for?
Use it to measure conversion, retention, errors, or other KPIs against historical averages, targets, or industry comparisons.
Why use it?
It prevents teams from judging isolated numbers without knowing what is normal, expected, or improving.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the fullstory-claude-plugin plugin — 46 skills, 3 agents, 1 MCP server shipped together

Good fit Use it to measure conversion, retention, errors, or other KPIs against historical averages, targets, or industry comparisons.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/reatlat/fullstory-claude-plugin/benchmark-analyzer
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 reatlat/fullstory-claude-plugin --skill benchmark-analyzer
Clone the repo
git clone --depth 1 https://github.com/reatlat/fullstory-claude-plugin

Made for: Claude Code.

Or install fullstory-claude-plugin, the plugin that ships this one along with the rest of its 46 skills, 3 agents, 1 MCP server.

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 benchmark-analyzer

README.md
[![agentmods](https://agentmods.dev/badge/skills/reatlat/fullstory-claude-plugin/benchmark-analyzer/github.svg)](https://agentmods.dev/skills/reatlat/fullstory-claude-plugin/benchmark-analyzer)
Your own site
<a href="https://agentmods.dev/skills/reatlat/fullstory-claude-plugin/benchmark-analyzer"><img src="https://agentmods.dev/badge/skills/reatlat/fullstory-claude-plugin/benchmark-analyzer/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 benchmark-analyzer

Your own site · 80×15
<a href="https://agentmods.dev/skills/reatlat/fullstory-claude-plugin/benchmark-analyzer"><img src="https://agentmods.dev/badge/skills/reatlat/fullstory-claude-plugin/benchmark-analyzer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 43 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,390 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
  • 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 $0.00043 $0.01390
Opus 5 $0.00022 $0.00695
Sonnet 5 $0.00009 $0.00278
Haiku 4.5 $0.00004 $0.00139

Measured 10d ago against content hash f454ae9aa865, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

benchmark-analyzer 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 10d ago.

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.

skills/benchmark-analyzer/SKILL.md · 142 lines

How it starts

The opening of the file, as written. The whole thing — 142 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Benchmark Analyzer

Establish baselines, set targets, and track progress — turn raw metrics into benchmarks you can measure against.

When to Use

  • "What's our baseline conversion rate?"
  • "Set a target for checkout completion — and track us against it"
  • "How does this quarter compare to Q2?"
  • "Are we on track to hit our retention target?"
  • "What's a good rage-click rate? Are we above or below average?"
  • "Benchmark our error rate against industry standards"

Mental Model

A metric without context is just a number. A benchmark gives it context:

  • Internal baseline: What's normal for us? (12-month average, last quarter's average)
  • Target: Where do we want to be? (goal set by the team, industry standard)
  • Comparison: How do we compare? (to ourselves over time, to peers if data available)

Workflow

Step 1: Define what to benchmark

Ask the user:

  • "What metrics matter most?" (conversion, retention, error rate, etc.)
  • "What time period should be the baseline?" (last quarter, last 12 months, since launch)
  • "Do you have specific targets, or do you want me to suggest them?"

Step 2: Compute the baseline

For each metric, compute over the baseline period:

fullstory:build_metric(query="checkout conversion rate", output_type="single_number")
fullstory:compute_metric(metric_id, time_range="last_12_months")
→ Baseline: 19.8% (12-month average)

Also compute the standard deviation or range:

fullstory:build_metric(query="checkout conversion rate", output_type="trend")
fullstory:compute_metric(metric_id, time_range="last_12_months")
→ Range: 16% - 24%, typical weekly variance: ±3pp

Step 3: Compare current to baseline

Current (last 30 days): 21.2%
Baseline (12-month avg): 19.8%
→ +1.4pp above baseline (+7%)
→ Within normal range (baseline range: 16-24%) ✅

Step 4: Set targets

Based on the baseline, suggest targets:

  • Conservative (achievable): 21-22% (slightly above baseline)
  • Ambitious (stretch): 23-24% (top of historical range)
  • Moonshot (breakthrough): 25%+ (above historical max)

Read the full file on GitHub · 142 lines

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. 10d ago First seen · 142 lines · 43 tokens per session scan A f454ae9aa865

Subscribe to this mod's changes

benchmark-analyzer is a skill published in the GitHub repository reatlat/fullstory-claude-plugin (62 stars, last pushed 27d ago), licensed MIT. It adds 43 tokens to every session and 1,390 once invoked, about $0.0002 per session on Opus 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 2026-08-30.