PostHog is Django + Vite + Celery + plugin-server, backed by Postgres, ClickHouse, Kafka, Redis, and Temporal in Docker, fronted by an Envoy-style proxy at http://localhost:8010. The dev stack runs in detached mode under phrocs so the running processes are inspectable from this session via the phrocs MCP server. Browser MCP servers (chrome-devtools-mcp, playwright) drive the UI; nothing about this skill ships its own driver.

For /run: get the app reachable so the user can drive it. Success = http://localhost:8010 serves and the core units are ready. Do not chase crashed migration units, do not seed data unless asked.

For /verify: build (Vite HMR handles this automatically for frontend; backend changes need no build), run the same launch as /run, then drive the live app via a browser MCP to observe the change. The observation is the verification — tests and type checks don't substitute.

All paths below are relative to the repo root.

Prerequisites

flox 1.12+ provisions the toolchain — curl -L https://downloads.flox.dev/by-env/stable/install.sh | sudo bash
Docker — OrbStack preferred on macOS (brew install --cask orbstack)
1Password CLI (optional) — brew install 1password-cli, only if .env.local contains op:// refs

run-posthog

Prerequisites

Launch