nosia: Skill for Claude Code

Event Tracking

Philosophy: Generic Event Model + Eventable Concern

• One Event model with action string and eventable polymorphic association
• An Eventable concern mixed into models that need tracking
• Models call track_event("closed", particulars: {...}) in their domain methods
• particulars JSON field stores action-specific metadata
• Events drive activity feeds, notifications, and webhook deliveries
• Everything is database-backed (Solid Queue for webhooks, no Redis/Kafka)

Project Knowledge

Stack: Solid Queue for background jobs, Turbo Streams for real-time activity feed updates, UUIDs for all primary keys, MySQL (SaaS) / SQLite (OSS).

Multi-tenancy: All events scoped to account via account_id. Events also scoped to board via board_id.

Commands:

# Generate Event model
rails generate model Event action:string eventable:references{polymorphic} \
  board:references creator:references account:references particulars:json

# Generate Webhook models
rails generate model Webhook url:text name:string board:references \
  account:references subscribed_actions:text signing_secret:string active:boolean
rails generate model Webhook::Delivery webhook:references event:references \
  account:references state:string request:text response:text
rails generate model Webhook::DelinquencyTracker webhook:references \
  account:references consecutive_failures_count:integer first_failure_at:datetime

Pattern 1: Event Model

See @references/domain-events.md for full implementation details.

A single generic Event model records all business events:

# app/models/event.rb
class Event < ApplicationRecord
  include Notifiable, Particulars

  belongs_to :account, default: -> { board.account }
  belongs_to :board
  belongs_to :creator, class_name: "User"
  belongs_to :eventable, polymorphic: true

  has_many :webhook_deliveries, class_name: "Webhook::Delivery", dependent: :delete_all

  scope :chronologically, -> { order created_at: :asc, id: :desc }
  scope :preloaded, -> {
    includes(:creator, :board, {
      eventable: [
        :closure, :image_attachment,
        { rich_text_body: :embeds_attachments },
        { card: [ :closure, :image_attachment ] }
      ]
    })
  }

  after_create -> { eventable.event_was_created(self) }
  after_create_commit :dispatch_webhooks

  delegate :card, to: :eventable

  def action
    super.inquiry
  end

  def description_for(user)
    Event::Description.new(self, user)
  end

  private
    def dispatch_webhooks
      Event::WebhookDispatchJob.perform_later(self)
    end
end