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How to migrate many files with a capped parallel run with Autoprompt Skill

Run a broad migration in Grok Build with a fixed limit on parallel subagents.

Who it is forA developer or maintainer with a repo-wide change, such as moving every model to a new pattern, who wants to limit parallel work and cost.

The problemBroad migrations touch many files, and an unlimited parallel run can cost more time and tokens than the team wants.

The outcomeAutoprompt runs the migration with at most the chosen number of subagents at once and checks the results.

What you need first

  • Node.js 20+
  • Python 3.11+ available as python3 or python, with PyYAML
  • Bash 4.3+ on macOS or Linux, or a native Windows setup as described in the README
  • At least one supported coding agent installed, such as Claude Code or Codex
  • A local project folder to work on

Steps

  1. npm install -g https://github.com/Spielewoy/autoprompt-skill/releases/download/v2.1.0/autoprompt-skill-2.1.0.tgz
  2. autoprompt, then choose Grok Build, confirm its path, and install
  3. autoprompt doctor grok --strict (inferred, check the README)
  4. autoprompt activate grok --target /absolute/project -- --concurrency custom --max-subs 4 "migrate every model" (inferred, check the README)
  5. Run the project's tests and review the diff before committing.

Prompt for your agent

Using the Spielewoy/autoprompt-skill repo, run `autoprompt activate grok --target <absolute project path> -- --concurrency custom --max-subs 4 "<your migration goal>"`. Expected output: the migration applied across the target files and a summary of what changed. Verify that the project's test suite passes after the run.

Caveat. Each Autoprompt run is started explicitly, and the README says it costs about 3x the time and 2x the tokens of a plain run, so a broad migration can be expensive.

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