Integration Angular — Agent Skill by PostHog

From the author

PostHog integration for Angular applications

— the description by PostHog

AutoGineer summary

Written by AutoGineer from the skill’s own files, not by the author

This skill provides a structured approach to integrating the PostHog JavaScript SDK into Angular projects. It emphasizes creating a singleton service to wrap the SDK, ensuring SSR safety, and following best practices for environment configuration and user identification. The integration covers event tracking, session recording, and error monitoring, with specific patterns for modern Angular versions.

What it does

Provides a pattern for creating a singleton PostHog service in Angular.
Ensures SSR safety when using PostHog in Angular applications.
Guides the configuration of environment variables for API keys and hosts.
Demonstrates how to identify users during authentication flows.
Includes patterns for capturing custom events and tracking errors.
Offers guidance on initializing PostHog outside the Angular zone for performance.

When to use it

When you need to add product analytics to an Angular application.
When you want to implement session replay or error tracking in Angular.
When you need to identify users to link frontend events to backend data.
When you are setting up a new Angular project and want to include PostHog from the start.

Advantages

Promotes a clean, maintainable architecture using singleton services.
Prevents performance issues by running PostHog outside the Angular zone.
Ensures secure handling of API keys via environment variables.
Provides SSR-safe implementation patterns for universal Angular apps.

Usage examples

“How do I initialize PostHog in my Angular app?”: The skill guides you to create a PostHogService singleton and initialize it in the root component, ensuring it is ready before other components render.
“How do I track a user login in Angular with PostHog?”: The skill provides the pattern for using the identify method within your authentication service to link user sessions to specific IDs.

Install

Download the skill as a ZIP:
https://mp-staging.autogineer.com/agent-skills/posthog/integration-angular/download

Unzip it into the cross-client skills folder of your project:

mkdir -p .agents/skills && unzip integration-angular.zip -d .agents/skills

Documentation by PostHog

PostHog integration for Angular

This skill helps you add PostHog analytics to Angular applications.

Workflow

Follow these steps in order to complete the integration:

basic-integration-1.0-begin.md - PostHog Setup - Begin ← Start here
basic-integration-1.1-edit.md - PostHog Setup - Edit
basic-integration-1.2-revise.md - PostHog Setup - Revise
basic-integration-1.3-conclude.md - PostHog Setup - Conclusion

Reference files

references/EXAMPLE.md - Angular example project code
references/angular.md - Angular - docs
references/identify-users.md - Identify users - docs
references/basic-integration-1.0-begin.md - PostHog setup - begin
references/basic-integration-1.1-edit.md - PostHog setup - edit
references/basic-integration-1.2-revise.md - PostHog setup - revise
references/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

Use inject() instead of constructor injection. PostHog service should be injected via inject() in components/services that need it.
Create a dedicated PosthogService as a singleton root service that wraps the PostHog SDK.
Always use standalone components over NgModules.
Configure PostHog credentials in src/environments/environment.ts files, as Angular reads environment variables from these configuration files

Identifying users

Identify users during login and signup events. Refer to the example code and documentation for the correct identify pattern for this framework. If both frontend and backend code exist, pass the client-side session and distinct ID using X-POSTHOG-DISTINCT-ID and X-POSTHOG-SESSION-ID headers to maintain correlation.

Error tracking

Add PostHog error tracking to relevant files, particularly around critical user flows and API boundaries.

Files

ATTRIBUTION.mdAdded by AutoGineer957 B
LICENSELicence file added by AutoGineer1.0 KiB
SKILL.md2.4 KiB
references/EXAMPLE.md23.4 KiB
references/angular.md12.5 KiB
references/basic-integration-1.0-begin.md2.1 KiB
references/basic-integration-1.1-edit.md2.5 KiB
references/basic-integration-1.2-revise.md937 B
references/basic-integration-1.3-conclude.md1.6 KiB
references/identify-users.md8.1 KiB

references/basic-integration-1.1-edit.md

title: PostHog Setup - Edit description: Implement PostHog event tracking in the identified files, following best practices and the example project

For each of the files and events noted in .posthog-events.json, make edits to capture events using PostHog. Make sure to set up any helper files needed. Carefully examine the included example project code: your implementation should match it as closely as possible. Do not spawn subagents.

Use environment variables for PostHog keys. Do not hardcode PostHog keys.

If a file already has existing integration code for other tools or services, don't overwrite or remove that code. Place PostHog code below it.

For each event, add useful properties, and use your access to the PostHog source code to ensure correctness. You also have access to documentation about creating new events with PostHog. Consider this documentation carefully and follow it closely before adding events. Your integration should be based on documented best practices. Carefully consider how the user project's framework version may impact the correct PostHog integration approach.

Remember that you can find the source code for any dependency in the node_modules directory. This may be necessary to properly populate property names. There are also example project code files available via the PostHog MCP; use these for reference.

Where possible, add calls for PostHog's identify() function on the client side upon events like logins and signups. Use the contents of login and signup forms to identify users on submit. If there is server-side code, pass the client-side session and distinct ID to the server-side code to identify the user. On the server side, make sure events have a matching distinct ID where relevant.

It's essential to do this in both client code and server code, so that user behavior from both domains is easy to correlate.

You should also add PostHog exception capture error tracking to these files where relevant.

Remember: Do not alter the fundamental architecture of existing files. Make your additions minimal and targeted.

Remember the documentation and example project resources you were provided at the beginning. Read them now.

Status

Status to report in this phase:

Inserting PostHog capture code
A status message for each file whose edits you are planning, including a high level summary of changes
A status message for each file you have edited

Upon completion, continue with: basic-integration-1.2-revise.md

Requirements and compatibility

Works with: Claude Code, Claude apps, OpenAI Codex, GitHub Copilot, Cursor, Gemini CLI, Kiro, OpenCode, Goose, Amp, Roo Code, JetBrains Junie, Factory Droid, Devin (ex-Windsurf), Mistral Vibe, OpenHands, Letta

“Works with” means the tool reads the open Agent Skills format; a skill written for one tool may use features others lack.

Security

No issues found by our static scan· No issues found

A static scan is not a guarantee. Skills are third-party content: review a skill before you let an agent use it.

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Download ZIP

The ZIP holds the skill’s files, its licence files and an ATTRIBUTION.md. Download integration-angular.zip