Piglet - PostHog Management CLI

Use the piglet command-line interface to manage PostHog resources. This skill handles feature flags, cohorts, dashboards, insights, and projects across US Cloud, EU Cloud, or self-hosted PostHog instances.

When to activate

• User asks about feature flags: "what flags do we have", "is X flag enabled", "create a flag for Y"
• User wants to manage rollouts: "roll out feature X to 50%", "disable the beta flag"
• User needs cohort information: "list our cohorts", "create a cohort for power users"
• User asks about dashboards or insights: "what dashboards exist", "show me insight X"
• User wants to export PostHog configuration: "export all flags as JSON"

Prerequisites

1. Install piglet:

   uv tool install cased-piglet
   piglet --version

2. Configure authentication (one of):

   # Environment variables (recommended)
   export POSTHOG_API_KEY="phx_your_key"
   export POSTHOG_PROJECT_ID="12345"
   
   # Or config file: ~/.piglet/config.toml
   # api_key = "phx_your_key"
   # project_id = 12345
   # host = "us"

3. Verify setup:

   piglet projects list

Core workflow

1. Confirm context

   • Check which PostHog project the user wants to work with
   • Verify credentials are configured: piglet projects list
   • Note the host if not US Cloud (eu, or custom URL)

2. Feature flags

   # List all flags
   piglet flags list
   piglet flags list --active      # only active
   piglet flags list --json        # for parsing
   
   # Get specific flag (by ID or key)
   piglet flags get my-feature-flag
   
   # Create a flag
   piglet flags create --key new-flag --name "New Feature" --rollout-percentage 50
   
   # Update rollout or status
   piglet flags update 123 --rollout-percentage 100
   piglet flags update 123 --active
   piglet flags update 123 --inactive
   
   # Delete (with confirmation)
   piglet flags delete 123
   piglet flags delete 123 --yes   # skip confirmation

3. Cohorts

   piglet cohorts list
   piglet cohorts list --static    # only static cohorts
   piglet cohorts get 456
   piglet cohorts create --name "Power Users"
   piglet cohorts create --name "Beta Testers" --static
   piglet cohorts update 456 --name "New Name"
   piglet cohorts delete 456

4. Dashboards

   piglet dashboards list
   piglet dashboards list --pinned
   piglet dashboards get 789
   piglet dashboards create --name "Engineering Metrics"
   piglet dashboards update 789 --pinned
   piglet dashboards delete 789

5. Insights

   piglet insights list
   piglet insights list --saved
   piglet insights get abc123      # by short_id
   piglet insights create --name "Daily Active Users"
   piglet insights update 101 --name "Weekly Active Users"
   piglet insights delete 101

6. Projects

   piglet projects list            # list all accessible projects
   piglet projects get 12345       # get project details

Output formats

Piglet supports three output formats:

# Rich table (default) - human readable
piglet flags list

# JSON - for programmatic use
piglet flags list --json

# Plain tab-separated - for scripting
piglet flags list --plain
piglet flags list --plain | cut -f2    # extract just flag keys

Working with different hosts

# US Cloud (default)
piglet flags list

# EU Cloud
piglet --host eu flags list

# Self-hosted
piglet --host https://posthog.mycompany.com flags list

Examples

Check if a flag exists and its status

piglet flags get my-feature-flag

Create a gradual rollout

# Start at 10%
piglet flags create --key gradual-release --name "Gradual Release" --rollout-percentage 10

# Later, increase to 50%
piglet flags update <flag_id> --rollout-percentage 50

# Full rollout
piglet flags update <flag_id> --rollout-percentage 100

Export configuration for backup

piglet flags list --json > flags-backup.json
piglet cohorts list --json > cohorts-backup.json

Quick flag toggle

# Disable a flag immediately
piglet flags update 123 --inactive

# Re-enable
piglet flags update 123 --active

Find flags by grepping plain output

# Find all flags with "beta" in the key
piglet flags list --plain | grep beta

Common pitfalls & recoveries

• "API key required" - Set POSTHOG_API_KEY env var or use --api-key
• "Project ID required" - Set POSTHOG_PROJECT_ID env var or use --project-id
• 403 Permission denied - API key lacks required scopes; generate a new key with appropriate permissions
• Wrong project - Verify project ID with piglet projects list, then use --project-id
• EU data - Remember to use --host eu for EU Cloud data

Best practices

• Use environment variables for credentials rather than CLI flags
• Use --json output when parsing results programmatically
• Use --plain output when piping to other CLI tools
• Always verify the target project before making changes
• Use --yes flag in scripts to skip confirmation prompts

References

• Command reference: reference.md
• Piglet repository: https://github.com/cased/piglet