Skip to content
agentusehub
Sign in+ Submit
Software & DevOpsAny

Migrate 180 microservices to a new framework version

Brex built Cursor-based self-correcting agents that let one engineer migrate 180 microservices to a newer Micronaut version in about a month.

Read the experience
Time saved
Not reported
Setup time
Not reported
Running cost
Not reported
Cost range
Not reported

Use case overview

Brex built Cursor-based self-correcting agents that let one engineer migrate 180 microservices to a newer Micronaut version in about a month.

Read the original report ↗

Reported experience

  1. What they did

    Brex split the work between two self-hosted Cursor agents. Creating a Linear ticket triggers a generation agent. It combines scripts with LLM reasoning, builds locally, self-corrects, and opens a draft PR. A GitHub label then triggers a validation agent. It deploys to dev, runs integration tests, and patches failures up to three times. Both agents load eleven small skills, one per failure type.

  2. How it went

    One engineer migrated 180 microservices in a month, which Brex puts at 32x per person. Cost per service fell about 90%. A few PRs passed all tests but still caused subtle production bugs.

  3. Worth knowing

    A single giant prompt run from laptops failed. Cloud-hosted agents, modular skills and a three-attempt cap fixed that. Human review was still required, and weak test coverage let bugs through.

Example prompts

Try with Cursor
Write a self-correcting migration agent that updates [list of services/repos] from [old framework version] to [new framework version], running build and tests after each change and fixing failures automatically. Have it report progress per service and pause before opening any pull requests for my review.

Related use cases

Software & DevOps

Port a Chrome extension to Safari

The author had ChatGPT take the Session Buddy extension source from Chrome, port it to Safari and install it, taking about 20 minutes.

ChatGPT