cli-exercise-preflight

Was der Skill vermittelt

An internal step of the cli-exercise skill in the GitHub CLI repository, not called by users directly, that checks whether the machine can record and render a test run before it starts. If a current readiness receipt fits the case it is reused; otherwise the agent builds the skill's helper once with downloads switched off and runs its capability check, which tests the terminal recording API, native terminal support, ffmpeg with the needed encoders, font rendering and any shell or editor the case needs. Missing pieces lead to exact install proposals that run only after approval, followed by a recheck. Refusals or failures are reported as blocked with a remedy, and install approval never covers GitHub writes or credential changes.

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