workflow-environment-ready — Preflight the Working Environment

Long autonomous runs fail most expensively at the end — the work is done, then the build won't run, a service is down, or a key is missing. This skill front- loads that risk: prove the environment can build, test, and reach its dependencies before implementation starts.

Verify the environment can run the task, don't assume it. Every check is an executed command with observed output, not an inference from a config file.

Phase 0 — Detect the stack and requirements

Read, don't guess: