Simulate New User Agent Skill

> Send synthetic first-time-visitor traffic to a URL and confirm that PostHog $pageview events fire. Use when a customer wants to verify that anonymous visitor tracking works, after deploying instrumentation changes, or when debugging "events not arriving" reports.

525 tokens

context cost

the whole folder, loaded on every use

files

instructions only

copies elsewhere

how many repositories repackaged it

690

stars on the repo

on the repository, not the skill itself

Install

one command, takes just this skill from the repository

npx skills add https://github.com/PostHog/posthog --skill simulate-new-user

The instruction itself

4 sections, as written by the author

Simulate new-user traffic

Drives a fresh browser context for each visit (no cookies, no localStorage),

goes to the given URL, scrolls a bit, and reports which PostHog events fired.

Each visit looks to PostHog like a brand-new anonymous visitor.

When to use

Confirm $pageview fires on the first visit (no cookies present).
Confirm an anonymous distinct_id is generated and a PostHog request

is sent within a few seconds of page load.

Reproduce "events not showing up for new users" reports.

How to invoke

Call the simulate_new_user MCP tool with:

url (required) — the page to visit, e.g. https://example.com/pricing.
visits (default 3) — number of fresh-context visits.
interval (default 5.0) — seconds between visits.
posthog_host (default https://us.i.posthog.com) — set to

https://eu.i.posthog.com for the EU cloud, or your self-hosted host

(e.g. https://ph.example.com).

Each visit takes ~10s of Playwright time plus the interval, so plan accordingly.

Interpreting the result

The tool returns a structured summary:

{
  "run_id": "a1b2c3d4",
  "scenario": "new-user",
  "total_visits": 3,
  "posthog_requests": 6,
  "posthog_requests_ok": 6,
  "events_by_type": { "$pageview": 3, "$autocapture": 3 },
  "pageviews": 3,
  "errors": [],
  "verified": true,
}

verified: true means at least one $pageview was captured per visit and

no errors occurred — the new-user flow works.

verified: false with pageviews: 0 means PostHog isn't firing pageviews.

Run check_posthog_loading next to see whether the snippet is even loaded.

posthog_requests_ok < posthog_requests means PostHog returned non-2xx

responses. Check the project's ingestion limits and api_host configuration.

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17k tokens

How to use it

Copy the folder

Take posthog/simulate-new-user from the repository into ~/.claude/skills for personal use, or into .claude/skills inside a project.

Check the name does not clash

The agent identifies a skill by the name field in its header. Two skills with the same name cannot sit side by side — one of them will be ignored.