posthog - SKILL.md Agent Skill

name: posthog description: Manage PostHog projects, events, feature flags and insights via API user-invocable: true argument-hint: [project ID or event name]

/posthog

Connect to the PostHog API to manage projects, events, persons, feature flags, insights and annotations. Works with PostHog Cloud and self-hosted instances. Pure Ruby, zero gems — stdlib only.

Structure

scripts/
├── auth.rb          # Bearer token + posthog_request helper (required by all scripts)
├── check_setup.rb   # Check if token and host are configured (outputs OK or SETUP_NEEDED)
├── save_token.rb    # Save and validate an API token (+ optional host)
├── projects.rb      # List all projects
├── events.rb        # List recent events for a project
├── persons.rb       # List persons for a project
├── feature_flags.rb # List feature flags for a project
├── feature_flag.rb  # Get feature flag details
├── toggle_flag.rb   # Toggle a feature flag on/off
├── insights.rb      # List saved insights for a project
└── annotations.rb   # List annotations for a project

Setup (check before using)

ruby ~/.claude/skills/posthog/scripts/check_setup.rb

If the output is OK, proceed to the Flow section.

If the output is SETUP_NEEDED, guide the user step by step. Present ONE step at a time, wait for the user to confirm before moving to the next.

Step 1 — Ask the user to create a Personal API Key:

You need a PostHog Personal API Key. Go to Project Settings > Personal API Keys in your PostHog dashboard:

https://app.posthog.com/settings/user-api-keys

Click Create personal API key, give it a label (e.g. "hitank"), and copy the key.

Paste the key here.

Step 2 — Ask if the user is on PostHog Cloud or self-hosted:

Are you using PostHog Cloud (app.posthog.com) or a self-hosted instance?

If Cloud, just paste your token.

If self-hosted, also provide your PostHog URL (e.g. https://posthog.yourcompany.com).

Step 3 — When the user pastes the token (and optional host), save it:

For PostHog Cloud:

ruby ~/.claude/skills/posthog/scripts/save_token.rb 'PASTED_TOKEN'

For self-hosted:

ruby ~/.claude/skills/posthog/scripts/save_token.rb 'PASTED_TOKEN' 'https://posthog.yourcompany.com'

If the script outputs an error, the token is invalid. Ask the user to double-check and try again.

If setup is not complete, DO NOT proceed to the Flow. Complete all steps first.

Flow

The argument $ARGUMENTS may contain a project ID or event name.

Step 1: List projects

ruby ~/.claude/skills/posthog/scripts/projects.rb

Present the projects to the user. If $ARGUMENTS matches a project ID, use that project. Otherwise ask which project to work with.

Step 2: Actions

Once a project is selected, ask what the user wants to do and run the appropriate script.

List recent events:

ruby ~/.claude/skills/posthog/scripts/events.rb PROJECT_ID

Filter events by name:

ruby ~/.claude/skills/posthog/scripts/events.rb PROJECT_ID --event '$pageview'

List persons:

ruby ~/.claude/skills/posthog/scripts/persons.rb PROJECT_ID

List feature flags:

ruby ~/.claude/skills/posthog/scripts/feature_flags.rb PROJECT_ID

Get feature flag details:

ruby ~/.claude/skills/posthog/scripts/feature_flag.rb PROJECT_ID FLAG_ID

Toggle a feature flag (requires user confirmation):

Show flag details first, then ask: "Do you want to toggle this flag to active/inactive?" Only execute after a "yes".

ruby ~/.claude/skills/posthog/scripts/toggle_flag.rb PROJECT_ID FLAG_ID true
ruby ~/.claude/skills/posthog/scripts/toggle_flag.rb PROJECT_ID FLAG_ID false

List saved insights:

ruby ~/.claude/skills/posthog/scripts/insights.rb PROJECT_ID

List annotations:

ruby ~/.claude/skills/posthog/scripts/annotations.rb PROJECT_ID

Notes

Pure Ruby, zero gems — stdlib only (json, net/http, uri, fileutils)
Auth via Bearer token (Personal API Key)
Token file: ~/.config/posthog/token (outside the repo, never commit)
Host file: ~/.config/posthog/host (defaults to https://app.posthog.com for Cloud)
Toggling feature flags requires explicit user confirmation
Base URL is read from the host file at runtime