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Post-mortem: 2026-06-07 → 2026-06-11 — Helius saturation, Postgres flap, and the safety nets that weren't

Authors: Stephen Margheim, with assistance from Claude Status: Resolved; resilience follow-ups in flight

TL;DR

Helius webhooks cap each project at 95k addresses. We knew this would eventually bind, and we'd built an auto-scaling provisioner ahead of time. When the cap was hit on 2026-06-07, the provisioner broke in a way that nothing alerted on. From

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OTA Updates Simplification — Implementation Plan

Owner: Stephen Margheim Scope: mobile-rn only. Replace the custom OTA orchestration service with a near-defaults Expo Updates setup, and finish the user-visible OTA control surface started in #1891 (merged) + #1927 (open). No backend, no infra changes. Linear: CORE-2252 Motivation: A production OTA published on 2026-06-07 failed to apply on a TestFlight build despite multiple restarts and a ~2-minute background gap. Root cause is bespoke logic that no other Expo team uses; see § Background. The fix also closes the loop on user-visible OTA state — making it trivial for a user (or support staff) to see what version they're on and force an update.

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Overview

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Lightning Payments — MVP Implementation Plan

Linear: Receive dollars from Cash App · CORE-2278 Decide on UX Owner: Stephen Margheim (Kappa) Scope: Backend + mobile-rn end-to-end MVP. Excludes the deferred items in the Linear Project's Scope/Out.

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Overview

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fun method_name => void do
	# ...
end

fun method_name => never do
	# ...
end
	
fun method_name => Integer do
	# ...

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# app/controllers/github/authorizations_controller.rb
module GitHub
  class AuthorizationsController < ApplicationController
    allow_unauthenticated_access only: :create
    before_action :resume_session, only: :show

    rescue_from ActionController::InvalidAuthenticityToken do
      redirect_to root_path, alert: "Authentication with GitHub failed: invalid state token"
    end
    rescue_from ActionController::ParameterMissing do

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class CreateFtsPosts < ActiveRecord::Migration[8.0]
  def change
    create_virtual_table :post_documents, :fts5,
      [:title, :body, "content=''", "contentless_delete=1", "tokenize='porter unicode61 remove_diacritics 2'"]
  end
end

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#   ┌──────{ , }◀─────┐
# ◯─┴┬─▶[ sql-stmt ]─┬┴─▶◯
#    └───────▶───────┘
def sql_stmt_list
end

# ◯─┬─────────────┬▶─────────────────────┬─┬─▶[ alter-table-stmt ]──────────▶─┬▶◯
#   └─{ EXPLAIN }─┴─▶{ QUERY }─▶{ PLAN }─┘ ├─▶[ analyze-stmt ]──────────────▶─┤
#                                          ├─▶[ attach-stmt ]───────────────▶─┤
#                                          ├─▶[ begin-stmt ]────────────────▶─┤

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class RoutingTest < ActionDispatch::IntegrationTest
  IGNORED_CONTROLLERS = Set[
    "Rails::MailersController"
  ]

  test "no unrouted actions (public controller methods)" do
    actions_by_controller.each do |controller_path, actions|
      controller_name = "#{controller_path.camelize}Controller"
      next if IGNORED_CONTROLLERS.include?(controller_name)

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require 'benchmark/ips'
require 'oj'
require 'json'

puts "Ruby version: #{RUBY_VERSION}"
puts "Oj version: #{Oj::VERSION}"
puts "JSON version: #{JSON::VERSION}"

# Sample data to hash - using varied data types
test_data = [1, "string", { a: 1, b: 2 }, [3, 4, 5]]

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# frozen_string_literal: true

require "bundler/inline"

gemfile(true) do
  source "https://rubygems.org"

  gem "rails", "8.0.0.rc1"
  # If you want to test against edge Rails replace the previous line with this:
  # gem "rails", github: "rails/rails", branch: "main"