[Refactor] Consolidate command execution in system.ts

[gonzaloriestra]

WHY are these changes introduced?

captureCommandWithExitCode and execCommand in packages/cli-kit/src/public/node/system.ts were manually duplicating the environment setup, directory handling, and error processing logic already present in their array-based counterparts, captureOutputWithExitCode and exec.

WHAT is this pull request doing?

Refactors captureCommandWithExitCode and execCommand to delegate to captureOutputWithExitCode and exec respectively. This centralizes the logic for:

• Setting FORCE_COLOR based on shouldDisplayColors().
• Handling the working directory (cwd).
• Performing checkCommandSafety checks.
• Configuring execa options like windowsHide.

How to test your changes?

Run any CLI command that uses these utilities, like shopify app build

Checklist

• I've considered possible cross-platform impacts (Mac, Linux, Windows)
• I've considered possible documentation changes
• I've considered analytics changes to measure impact

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PR created automatically by Jules for task 14120344445568562033 started by @gonzaloriestra

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[gonzaloriestra]

/snapit

[github-actions]

🫰✨ Thanks @gonzaloriestra! Your snapshot has been published to npm.

Test the snapshot by installing your package globally:

pnpm i -g --@shopify:registry=https://registry.npmjs.org @shopify/cli@0.0.0-snapshot-20260511101727

Caution

After installing, validate the version by running shopify version in your terminal.
If the versions don't match, you might have multiple global instances installed.
Use which shopify to find out which one you are running and uninstall it.