Environment

Node 22.19 (lts)
Latest commit

Reproduction

1. Checkout latest commit
2. Change the static argument at playground/commands/deploy.ts:25

    static: {
      type: "boolean",
      description: "Don't include the files in the CWD as static files",
--    default: false,
++    default: true,
++    alias: 's'
    },

3. Observe the parsed output with these invalid flags

Describe the bug

Negative flags are parsed and accept mixed short and long dash prefixes regardless of being an alias or not.

This means that a (default: true) boolean argument named foo-boolean with an alias fb would parse the following negative formats:

• --no-foo-boolean
• -no-foo-boolean (unexpected)
• -no-fb (not sure)
• --no-fb (not sure)

Additional context

Honestly, the short prefix on negative aliases look weird to me 😅

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