Single source of truth for standard abbreviations in names (vars / fns / classes / CSS classes / tokens) and terse text (comments, commit msgs, logs).

When moving, renaming, or deleting a file/directory that **might be tracked by git**, never use bare `mv` / `rm` — that drops git's rename/delete tracking and leaves the index inconsistent. Use the helper:

Three cognitive tiers — skills and delegation rules name **tiers only**, never vendor model slugs. Resolved slugs for this session are injected at **SessionStart** (`hooks/model-tiers-inject.sh`) and appear in context as `cheap`, `standard`, `judgment`.

**Invariant: every new project is containerized from the start.** Not "local first, wrap it later" — from the first commit there's a `Dockerfile`, `docker-compose.yml`, `Makefile` and log wiring. This kills "works on my machine", gives unified commands and turns on observability right away.

A quality gate you run **before** declaring a task done. It is project-agnostic: it discovers *what* changed, maps that to the project's make targets, runs only the relevant ones, and reports Pass/Fail per check.

Generate an exhaustive technical roadmap for building a whole application, then execute it autonomously. Detailed enough that an agent can pick up any phase and work it for hours without further clarification.

Working with **Yandex OAuth (Yandex ID)** user-scoped tokens: get one, refresh it non-interactively, wire it into a service/cron, and diagnose auth failures (esp. `403 access_denied` on Metrika).