Docker 内の `playwright-cli` 実行に限定した補助 skill。named session の利用、スクリーンショット再利用、container profile 前提の操作に絞る。
Use when verifying this repository's Slack bot behavior by actually sending image-attached DMs in Slack Web, especially with `docker compose up -d --build` and `playwright-cli` against the CodexAgent DM thread.
Use when adding, renaming, reorganizing, or reviewing tests in this repository, especially when the goal is to make tests readable as specification and align them with module boundaries and behavior-first descriptions.