A guide for comparing user behaviour in FullStory, a tool that records website and app interactions. It explains when to compare event details and when to compare separate groups of users.

Use it when analysing FullStory data, such as comparing actions with different event details or comparing groups of users with different user-level properties.

It helps prevent incorrect comparisons caused by mixing properties of individual actions with properties of whole users.

comparisons — Skill for Claude Code by fullstorydev/fullstory-skills

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 fullstorydev/fullstory-skills --skill comparisons

Clone the repo

git clone --depth 1 https://github.com/fullstorydev/fullstory-skills

Made for: Claude Code.

Or install fullstory, the plugin that ships this one along with the rest of its 5 skills, 1 agent, 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/fullstorydev/fullstory-skills/comparisons/github.svg)](https://agentmods.dev/skills/fullstorydev/fullstory-skills/comparisons)

Your own site

<a href="https://agentmods.dev/skills/fullstorydev/fullstory-skills/comparisons"><img src="https://agentmods.dev/badge/skills/fullstorydev/fullstory-skills/comparisons/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/fullstorydev/fullstory-skills/comparisons"><img src="https://agentmods.dev/badge/skills/fullstorydev/fullstory-skills/comparisons.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 40 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,078 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.

Origin unknown 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.

Model	Per session	Once invoked
Fable 5.1	$0.00040	$0.01078
Opus 5.5	$0.00016	$0.00431
Sonnet 5.5	$0.00008	$0.00216
Haiku 4.5	$0.00004	$0.00108

Measured 15d ago against content hash 15217c4d85d2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

comparisons 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 15d 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/comparisons/SKILL.md · 50 lines

The source is not reproduced here

No licence file

Read it on GitHub

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.

15d ago Changed 15217c4d85d2
2mo ago First seen · 50 lines · 40 tokens per session scan A d8c6df990961

Subscribe to this mod's changes

comparisons is a skill published in the GitHub repository fullstorydev/fullstory-skills (11 stars, last pushed 8d ago), with no licence file. It adds 40 tokens to every session and 1,078 once invoked, about $0.0002 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 2026-08-30.

Analytics and metrics

comparisons next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
comparisonsfullstorydev/fullstory-skills	Skill	11	8d ago	none	A	40	Claude Code
imagegenopenai/codex	Skill	133k	yesterday	Apache-2.0	A	113	Codex
playwright-climicrosoft/playwright	Skill	99k	yesterday	Apache-2.0	A	19	Claude Code
local-ai-agentsmicrosoft/ai-agents-for-beginners	Skill	79k	4d ago	MIT	A	200	Claude Code, Codex
systematic-debuggingobra/superpowers	Skill	313k	3d ago	MIT	A	21	Claude Code
next-cache-components-adoptionvercel/next.js	Skill	143k	yesterday	MIT	A	95	Claude Code
next-partial-prefetching-adoptionvercel/next.js	Skill	143k	yesterday	MIT	A	103	Claude Code