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Feature Flags iOS

PostHogOfficialCreated by PostHog

  • Skill
  • Tool integration
  • Data and AI
  • MIT
  • No issues found
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From the author

PostHog feature flags for iOS 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 implementing PostHog feature flags within iOS applications. It covers the necessary setup for Swift projects, including environment variable management, Swift Package Manager (SPM) configuration, and platform-specific build settings. The guide emphasizes maintaining clean code by minimizing flag dispersion and ensuring consistent user experiences through proper identification and evaluation strategies.

What it does

  • Provides guidelines for secure configuration using environment variables.
  • Details the manual setup of SPM dependencies for iOS projects.
  • Outlines best practices for flag naming and code organization.
  • Offers instructions for handling network settings in sandboxed environments.
  • Explains how to integrate feature flag logic into existing iOS codebases.

When to use it

  • When you need to implement feature flagging in a native iOS application.
  • When you want to manage feature rollouts or experiments using PostHog.
  • When you need to configure PostHog SDK dependencies in an Xcode project.
  • When you are looking for best practices to avoid UI flicker or performance issues with flags.

Advantages

  • Promotes secure handling of sensitive configuration keys.
  • Ensures consistent flag evaluation across different app sessions.
  • Helps maintain clean, modular code by centralizing flag logic.
  • Provides specific technical guidance for Xcode and SPM integration.

Usage examples

“How do I add the PostHog SDK to my iOS project using SPM?”
The agent provides the steps to create the required PBXBuildFile, XCSwiftPackageProductDependency, and XCRemoteSwiftPackageReference objects in your project.pbxproj file.
“What is the best way to store my PostHog project token in an iOS app?”
The agent instructs you to use an environment variable accessed via a PostHogEnv enum, ensuring the token is not hardcoded in your source code.

Install

  1. Download the skill as a ZIP:

    https://autogineer.com/agent-skills/posthog/feature-flags-ios/download

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

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

Documentation by PostHog

PostHog feature flags for iOS

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

Reference files

  • references/ios.md - Ios 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

  • Read configuration from environment variables via a PostHogEnv enum with a value computed property that calls ProcessInfo.processInfo.environment[rawValue] and fatalErrors if missing — cases should be projectToken = "POSTHOG_PROJECT_TOKEN" and host = "POSTHOG_HOST", set in the Xcode scheme's Run environment variables

  • When adding SPM dependencies to project.pbxproj, create three distinct objects with unique UUIDs — a PBXBuildFile (with productRef), an XCSwiftPackageProductDependency (with package and productName), and an XCRemoteSwiftPackageReference (with repositoryURL and requirement). The build file goes in the Frameworks phase files, the product dependency goes in the target's packageProductDependencies, and the package reference goes in the project's packageReferences.

  • Check the latest release version of posthog-ios at https://github.com/PostHog/posthog-ios/releases before setting the minimumVersion in the SPM package reference — do not hardcode a stale version

  • If the project uses App Sandbox (macOS), add ENABLE_OUTGOING_NETWORK_CONNECTIONS = YES to the target's build settings so PostHog can reach its servers — do NOT disable the sandbox entirely

Files

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.

Attribution and licence

Created by
PostHog
Publisher
PostHog (Official)
Source
PostHog/skills · skills/posthog/feature-flags/skills/ios · commit a5d30e7
Licence
MIT License (redistribution allowed)
  • LICENSE (added by AutoGineer from LICENSE)
  • ATTRIBUTION.md (written by AutoGineer)
Synced
Also distributed in
PostHog/skills

AutoGineer is not affiliated with or endorsed by PostHog or PostHog.

Download ZIP

The ZIP holds the skill’s files, its licence files and an ATTRIBUTION.md. Download feature-flags-ios.zip