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.
npx agentmods add skills/posthog/skills/integration-exponpx skills add PostHog/skills --skill integration-expogit clone --depth 1 https://github.com/PostHog/skillsWrote 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.
[](https://agentmods.dev/skills/posthog/skills/integration-expo)<a href="https://agentmods.dev/skills/posthog/skills/integration-expo"><img src="https://agentmods.dev/badge/skills/posthog/skills/integration-expo.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00011 | $0.00672 |
| Opus 5 | $0.00005 | $0.00336 |
| Sonnet 5 | $0.00002 | $0.00134 |
| Haiku 4.5 | $0.00001 | $0.00067 |
Grade A, and why
integration-expo 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.
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.
Copies of this mod
1 near-identical copy found in the catalogue:
- integration-swift — 88% identical, 24 lines differ
How it starts
The opening of the file, as written. The whole thing — 58 lines — stays where its author put it; the contents beside it link to each section on GitHub.
PostHog integration for Expo
This skill helps you add PostHog analytics to Expo applications.
Workflow
Follow these steps in order to complete the integration:
basic-integration-1.0-begin.md- PostHog Setup - Begin ← Start herebasic-integration-1.1-edit.md- PostHog Setup - Editbasic-integration-1.2-revise.md- PostHog Setup - Revisebasic-integration-1.3-conclude.md- PostHog Setup - Conclusion
Reference files
references/EXAMPLE.md- Expo example project codereferences/react-native.md- React native - docsreferences/identify-users.md- Identify users - docsreferences/basic-integration-1.0-begin.md- PostHog setup - beginreferences/basic-integration-1.1-edit.md- PostHog setup - editreferences/basic-integration-1.2-revise.md- PostHog setup - revisereferences/basic-integration-1.3-conclude.md- PostHog setup - conclusion
The example project shows the target implementation pattern. Consult the documentation for API details.
Key principles
- Environment variables: Always use environment variables for PostHog keys. Never hardcode them.
- Minimal changes: Add PostHog code alongside existing integrations. Don't replace or restructure existing code.
- Match the example: Your implementation should follow the example project's patterns as closely as possible.
Framework guidelines
- posthog-react-native is the React Native SDK package name (same as bare RN)
- Use expo-constants with app.config.js extras for POSTHOG_PROJECT_TOKEN and POSTHOG_HOST (NOT react-native-config)
- Access config via
Constants.expoConfig?.extra?.posthogProjectTokenin your posthog.ts config file - For expo-router, wrap PostHogProvider in app/_layout.tsx and manually track screens with
posthog.screen(pathname, params)in a useEffect - posthog-react-native is the React Native SDK package name
- Use react-native-config to load POSTHOG_PROJECT_TOKEN and POSTHOG_HOST from .env (variables are embedded at build time, not runtime)
- react-native-svg is a required peer dependency of posthog-react-native (used by the surveys feature) and must be installed alongside it
- Place PostHogProvider INSIDE NavigationContainer for React Navigation v7 compatibility
What ships with it
7 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.
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 · 58 lines · 11 tokens per session scan A 204b6b30f995
integration-expo is a skill published in the GitHub repository PostHog/skills (60 stars, last pushed today), licensed MIT. It adds 11 tokens to every session and 672 once invoked, about $0.0001 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 2026-09-03.
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