[MODEL] sonnet 5 Extra

Preflight Checklist

• [x] I have searched existing issues for similar behavior reports
• [x] This report does NOT contain sensitive information (API keys, passwords, etc.)

Type of Behavior Issue

Claude modified files I didn't ask it to modify

What You Asked Claude to Do

Summary: Asked to fix a recurring "white text on white background" bug in dropdown menus in a Medusa admin panel (dark-themed app). The session took over an hour and multiple deploys to reach a real fix, because the assistant guessed at the mechanism repeatedly instead of opening the actual page and looking.

Sequence of what went wrong:

First diagnosis (wrong, unverified against my actual browser): Assumed the cause was the CSS color-scheme property never being set. Deployed a fix to both the admin and storefront based on this.
Reported "still broken." Instead of asking what I was actually seeing, the assistant re-investigated and found that its own first fix was inert on the admin — a separate Medusa mechanism was overriding it. This should have been checked before deploying the first fix, not after I complained.
Went looking at the live page and found a real, different bug — a login-page branding script was incorrectly matching an unrelated admin page and inserting a logo into the middle of a form. Fixed it — but the fix itself contained a bug (a regex string got mangled by an escaping issue in the build script), which broke the login page's own branding as a regression. Had to be caught and fixed in a second pass.
I asked directly what page and dropdown I meant, which should have been asked in step 1, before touching anything.
Only then did the assistant discover the actual root cause: a prior session had already diagnosed this exact bug months earlier and attempted a CSS fix targeting the dropdown's <option> elements directly — and it evidently still didn't work in my browser. That was the signal that no CSS-only approach could be trusted, and the dropdown needed to be rebuilt as a custom component instead of relying on the browser's native (and apparently unstyleable, in my environment) dropdown popup. That rebuild is what actually fixed it, verified with a real screenshot of the open list.
Core complaint: Steps 1–4 were avoidable. The information that resolved this (a prior session's failed attempt at the same fix, sitting in the codebase; and my actual browser's behavior) was available from the start. The assistant repeatedly deployed guesses to production and asked me to verify them, rather than investigating thoroughly — or simply asking me what I was seeing — before making changes.

What Claude Actually Did

Summary: Asked to fix a recurring "white text on white background" bug in dropdown menus in a Medusa admin panel (dark-themed app). The session took over an hour and multiple deploys to reach a real fix, because the assistant guessed at the mechanism repeatedly instead of opening the actual page and looking.

Sequence of what went wrong:

First diagnosis (wrong, unverified against my actual browser): Assumed the cause was the CSS color-scheme property never being set. Deployed a fix to both the admin and storefront based on this.
Reported "still broken." Instead of asking what I was actually seeing, the assistant re-investigated and found that its own first fix was inert on the admin — a separate Medusa mechanism was overriding it. This should have been checked before deploying the first fix, not after I complained.
Went looking at the live page and found a real, different bug — a login-page branding script was incorrectly matching an unrelated admin page and inserting a logo into the middle of a form. Fixed it — but the fix itself contained a bug (a regex string got mangled by an escaping issue in the build script), which broke the login page's own branding as a regression. Had to be caught and fixed in a second pass.
I asked directly what page and dropdown I meant, which should have been asked in step 1, before touching anything.
Only then did the assistant discover the actual root cause: a prior session had already diagnosed this exact bug months earlier and attempted a CSS fix targeting the dropdown's <option> elements directly — and it evidently still didn't work in my browser. That was the signal that no CSS-only approach could be trusted, and the dropdown needed to be rebuilt as a custom component instead of relying on the browser's native (and apparently unstyleable, in my environment) dropdown popup. That rebuild is what actually fixed it, verified with a real screenshot of the open list.
Core complaint: Steps 1–4 were avoidable. The information that resolved this (a prior session's failed attempt at the same fix, sitting in the codebase; and my actual browser's behavior) was available from the start. The assistant repeatedly deployed guesses to production and asked me to verify them, rather than investigating thoroughly — or simply asking me what I was seeing — before making changes.

Expected Behavior

fix css

Files Affected

Permission Mode

Accept Edits was ON (auto-accepting changes)

Can You Reproduce This?

Yes, every time with the same prompt

Steps to Reproduce

_No response_

Claude Model

Sonnet

Relevant Conversation

Impact

Critical - Data loss or corrupted project

Claude Code Version

sonnet 5 extra

Platform

Anthropic API

Additional Context

_No response_