Setup Playbook

HARD-GATE

• Elixir/Erlang/OTP versions must match .tool-versions / .elixir-version.
• mix deps.get, mix ecto.create, mix ecto.migrate, and mix test must succeed locally before CI is considered valid.
• No secrets, tokens, or environment-specific URLs are committed.
• CI workflow is defined and covers mix format --check-formatted, mix credo --strict, and mix test (plus mix dialyzer if the project uses it).

When to use

New machine, new Phoenix app bootstrap, or repairing a broken local/CI environment.

Atomic skills this playbook loads