Error Tracking Ruby Agent Skill

by PostHog

PostHog error tracking for Ruby

7k tokens

context cost

the whole folder, loaded on every use

files

instructions only

copies elsewhere

how many repositories repackaged it

stars on the repo

on the repository, not the skill itself

Install

one command, takes just this skill from the repository

npx skills add https://github.com/PostHog/skills --skill error-tracking-ruby

What comes with it

27 536 bytes besides the instruction

references/alerts.md

references/assigning-issues.md

references/fingerprints.md

references/monitoring.md

references/ruby.md

references/upload-source-maps.md

The instruction itself

4 sections, as written by the author

PostHog error tracking for Ruby

This skill helps you add PostHog error tracking to Ruby applications.

Reference files

references/ruby.md - Ruby error tracking installation - docs
references/fingerprints.md - Fingerprints - docs
references/alerts.md - Send error tracking alerts - docs
references/monitoring.md - Monitor and search issues - docs
references/assigning-issues.md - Assign issues to teammates - docs
references/upload-source-maps.md - Upload source maps - docs

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

Key principles

Environment variables: Always use environment variables for PostHog keys and host URLs. Never hardcode them.
Minimal changes: Add error tracking alongside existing error handling. Don't replace or restructure existing error handling code.
Autocapture first: Enable exception autocapture in the SDK initialization before adding manual captures.
Source maps: Upload source maps so stack traces resolve to original source code, not minified bundles.
Manual capture for boundaries: Use captureException() at error boundaries and catch blocks for errors that don't propagate to the global handler.

Framework guidelines

posthog-ruby is the Ruby SDK gem name (add gem 'posthog-ruby' to Gemfile) but require it with require 'posthog' (NOT require 'posthog-ruby')
Use PostHog::Client.new(api_key: key, host: host) for instance-based initialization in scripts and CLIs
In CLIs and scripts: MUST call client.shutdown before exit or all events are lost
Use begin/rescue/ensure with shutdown in the ensure block for proper cleanup
capture and identify take a single hash argument: client.capture(distinct_id: 'user_123', event: 'my_event', properties: { key: 'value' })
capture_exception takes POSITIONAL args (not keyword): client.capture_exception(exception, distinct_id, additional_properties) — do NOT use distinct_id: keyword syntax

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How to use it

Copy the folder

Take posthog/error-tracking-ruby from the repository into ~/.claude/skills for personal use, or into .claude/skills inside a project.

Check the name does not clash

The agent identifies a skill by the name field in its header. Two skills with the same name cannot sit side by side — one of them will be ignored.