Feature Flags Android — Agent Skill by PostHog

From the author

PostHog feature flags for Android applications

— the description by PostHog

AutoGineer summary

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

This skill provides guidance and best practices for implementing PostHog feature flags within Android applications. It covers the necessary SDK installation, configuration in the Application class, and methods for evaluating both boolean and multivariate flags. The skill emphasizes secure practices, such as using environment variables for API keys, and provides patterns for initializing the PostHog client to ensure efficient flag management.

What it does

Guides the installation of the PostHog Android SDK via Gradle.
Provides patterns for initializing PostHog in the Application class.
Demonstrates how to evaluate boolean feature flags in Kotlin.
Shows how to implement multivariate feature flags for specific user variants.
Offers best practices for flag management and environment variable usage.
Integrates with PostHog MCP tools for direct flag management.

When to use it

When you need to perform phased rollouts of new features in an Android app.
When you want to run A/B tests or experiments on specific user segments.
When you need to toggle features on or off remotely without a new app release.
When you are setting up a new Android project and want to include feature flagging capabilities.

Advantages

Enables safer feature releases through gradual rollouts.
Allows for remote configuration of app behavior.
Supports data-driven decision making via experiments.
Promotes clean code by separating feature logic from deployment.

Usage examples

“How do I check if a feature flag is enabled in my Android app?”: The agent will provide the Kotlin code snippet using PostHog.isFeatureEnabled('flag-key') and explain how to handle the boolean result.
“Show me how to initialize PostHog in my Android Application class.”: The agent will provide a sample implementation of the Application class, demonstrating the correct use of PostHogAndroid.setup() within the onCreate() method.

Install

Download the skill as a ZIP:
https://mp-staging.autogineer.com/agent-skills/posthog/feature-flags-android/download

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

mkdir -p .agents/skills && unzip feature-flags-android.zip -d .agents/skills

Documentation by PostHog

PostHog feature flags for Android

This skill helps you add PostHog feature flags to Android applications.

Reference files

references/android.md - Android feature flags installation - docs
references/adding-feature-flag-code.md - Adding feature flag code - docs
references/best-practices.md - Feature flag best practices - docs

Consult the documentation for API details and framework-specific patterns.

Key principles

Environment variables: Always use environment variables for PostHog keys. Never hardcode them.
Minimal changes: Add feature flag code alongside existing logic. Don't replace or restructure existing code.
Boolean flags first: Default to boolean flag checks unless the user specifically asks for multivariate flags.
Server-side when possible: Prefer server-side flag evaluation to avoid UI flicker.

PostHog MCP tools

Check if a PostHog MCP server is connected. If available, look for tools related to feature flag management (creating, listing, updating, deleting flags). Use these tools to manage flags directly in PostHog rather than requiring the user to do it manually in the dashboard.

Framework guidelines

Adapt dependency configuration to the appropriate build.gradle(.kts) file according to the project gradle version
Call PostHogAndroid.setup() only once in the Application class's onCreate() method, so it's initialized as early as possible and only once.
Initialize PostHog in the Application class's onCreate() method
Ensure every activity has a android:label to accurately track screen views.

Files

ATTRIBUTION.mdAdded by AutoGineer963 B
LICENSELicence file added by AutoGineer1.0 KiB
SKILL.md1.7 KiB
references/adding-feature-flag-code.md108.7 KiB
references/android.md3.5 KiB
references/best-practices.md7.9 KiB

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.

Needs: Needs an MCP server

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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