A guide for adding UTM tags to links and organising their names for GA4, Google Analytics 4. It also covers automatic tagging, traffic-grouping rules, common errors, and BigQuery checks.

Creating tagged campaign links, defining channel naming rules, and checking analytics data with BigQuery queries.

It reduces inconsistent campaign labels and makes marketing traffic easier to classify and verify in analytics.

utm-builder — Skill for Claude Code by cognyai

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 cognyai/claude-code-marketing-skills --skill utm-builder

Clone the repo

git clone --depth 1 https://github.com/cognyai/claude-code-marketing-skills

Made for: Claude Code.

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/cognyai/claude-code-marketing-skills/utm-builder/github.svg)](https://agentmods.dev/skills/cognyai/claude-code-marketing-skills/utm-builder)

Your own site

<a href="https://agentmods.dev/skills/cognyai/claude-code-marketing-skills/utm-builder"><img src="https://agentmods.dev/badge/skills/cognyai/claude-code-marketing-skills/utm-builder/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/cognyai/claude-code-marketing-skills/utm-builder"><img src="https://agentmods.dev/badge/skills/cognyai/claude-code-marketing-skills/utm-builder.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 31 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 6,907 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	$0.00031	$0.06907
Opus 5.5	$0.00012	$0.02763
Sonnet 5.5	$0.00006	$0.01381
Haiku 4.5	$0.00003	$0.00691

Measured 25d ago against content hash e2426a636e3b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

utm-builder 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 25d 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/utm-builder/SKILL.md · 562 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.

25d ago Changed · +135 lines e2426a636e3b
2mo ago First seen · 427 lines · 31 tokens per session scan A d172bb014c69

Subscribe to this mod's changes

utm-builder is a skill published in the GitHub repository cognyai/claude-code-marketing-skills (114 stars, last pushed 25d ago), with no licence file. It adds 31 tokens to every session and 6,907 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 2026-08-30.

Analytics and metrics Claude Code Marketing and SEO agent-skills ai-agents claude-skills cluade-mcp cursor

utm-builder next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
utm-buildercognyai/claude-code-marketing-skills	Skill	114	25d ago	none	A	31	Claude Code
create-video-seedance-2-falgooseworks-ai/goose-skills	Skill	1.3k	10d ago	MIT	A	121	Claude Code, Codex
meta-ad-managergooseworks-ai/goose-skills	Skill	1.3k	10d ago	MIT	A	108	Codex
create-chatgpt-mockupgooseworks-ai/goose-skills	Skill	1.3k	10d ago	MIT	A	90	Claude Code, Codex
run-memorygooseworks-ai/goose-skills	Skill	1.3k	10d ago	MIT	A	72	Claude Code, Codex
company-contact-findergooseworks-ai/goose-skills	Skill	1.3k	10d ago	MIT	A	55	Claude Code, Codex
make-content-content-briefgooseworks-ai/goose-skills	Skill	1.3k	10d ago	MIT	A	84	Claude Code, Codex