[BUG] Plan mode creates `/.claude/plans` and is over optimizing on simple prompt

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Not sure if this is a bug, but this is very different behavior.

plan mode now seems like it is over optimizing for simple things.
It created a several hundred line plan, and wanted to generate a file in ~/.claude/plans
This is new, I do not like the several hundred line plan though. Usually for something like this, it would generate maybe 80 - 120 lines for the plan overview, but now it is reaching 800 or more lines, and full of a lot more detail and over engineering than i requested. Not sure if it is because of the prompt i used or not.

Here is the prompt

Looking at @src/cmd/eod/eodhd/daily_eod_ingestion.py And it's pipeline I would like to make an
enhancement. I believe we are not doing a bulk insert into the database for the historical EOD pricing
table and I believe we are not getting from the database the ticker history rows at a bulk request either.

What Should Happen?

Probably would like to have this type of plan, but it should be activated with a keyword.

Error Messages/Logs

Steps to Reproduce

Here are two prompts that triggered it

Looking at @src/cmd/eod/eodhd/daily_eod_ingestion.py And it's pipeline I would like to make an
enhancement. I believe we are not doing a bulk insert into the database for the historical EOD pricing
table and I believe we are not getting from the database the ticker history rows at a bulk request either.

I believe we fix this issue,  but - no repository should have
two or more tables in it.   There should be one repo dedicated to
 one table.
    - need to fix `get_active_ticker_history_symbols` and
`get_active_ticker_histories` in
`src/repos/equities/tickers/ticker_history_repository.py`
   please check and confirm that all the other files in
@src/repos is not using joins at all.

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

2.0.51

Claude Code Version

2.0.53

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_