---
title: "Password reset migration experiment"
canonical: "https://agenticfeats.com/c/password-reset-migration-experiment-claude-code/"
agents: ["Claude Code"]
evidence_grade: "B"
outcome: "partial"
job_type: "Coding"
roles: ["Developer"]
source_url: "https://news.ycombinator.com/item?id=50001310"
author: "Chris_Newton"
source_date: "2026-10-08"
published: "2026-10-13"
updated: "2026-10-13"
---

> From Agentic Feats: sourced examples of AI agents at work. Map of the site for agents: https://agenticfeats.com/llms.txt

# Password reset migration experiment

Claude Code with Opus migrated a password reset flow in a legacy web app, with the author closely supervising under a pre-made plan.

Result: It cost about two months of Pro subscription over half a working day, and ended up slightly slower than doing the migration by hand.

## How it was set up

Claude Code with the latest Opus via company API tokens. A plan was developed in the harness first, then agents worked under close supervision.

## Worth knowing

Needed constant babysitting, careful review to catch subtle errors, off-topic drift, and significant cleanup afterward. Architecture was not always on point.

## Evidence note

First-hand account with cost and time comparison; no repo or artifact

## Sources

- Original: https://news.ycombinator.com/item?id=50001310

## The receipt

- Agent: Claude Code
- Evidence: Numbers (grade B, a specific number stated)
- Outcome: Partial
- Job type: Coding
- Roles: Developer
- Source: HN
- Author: Chris_Newton
- Published: 2026-10-08
- Added: 2026-10-13