feat: add pre/post lifecycle hooks for package.json scripts

[branchseer]

Summary

Adds npm-style pre/post lifecycle hooks for package.json scripts.

If you have a script named test, you can now define pretest and posttest scripts that automatically run before and after it — no extra configuration needed:

{
  "scripts": {
    "pretest": "docker compose up -d",
    "test": "vitest run",
    "posttest": "docker compose down"
  }
}

Running vt run test will execute all three in order.

Behavior

• Hooks apply only to package.json scripts, not tasks defined in vite-task.json
• Extra CLI args (e.g. vt run test --coverage) are passed to the main script only, not the hooks
• Hooks are one level deep: when test runs pretest as a hook, pretest does not also run prepretest — matching npm's behavior
• Opt out workspace-wide with enablePrePostScripts: false in the root vite-task.json

Test plan

• script-hooks: pre/post hooks run in correct order; extra args not forwarded to hooks; running pretest directly does expand prepretest, but prepretest is not included when pretest runs as a hook of test
• script-hooks-disabled: enablePrePostScripts: false suppresses hooks
• script-hooks-task-no-hook: task configs are not expanded with hooks

🤖 Generated with Claude Code

[branchseer]

• feat: add pre/post lifecycle hooks for package.json scripts #231 👈 (View in Graphite)
• main

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