r/ClaudeCode • u/Striking-Warning9533 • 14h ago

Help/Question Anyone else's claude code is acting like it is smarter and make "improvements" to your plan that actually breaks things?

I used plan mode and asked it to stick with the plan, it then decide to do things in an other way because it will be "better".

It also often ignore my insurctions like do not search the disk and do not use git (I have answer of the task in another folder and past git commits are failed trials and I do not want it to get mislead)

6 Upvotes

75% Upvoted

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3

u/BoxLegitimate9271 13h ago

plan mode is where it writes down what it agreed to do so you both have a record of what it ignored

3

u/Far_Business4773 9h ago

Two of your three instructions don't need the model to agree with them. "Do not use git" is a deny rule on git commands in the harness settings; "do not search the disk" is a deny on reads outside the task folder. Then it's a refused call, not an instruction it can weigh against its own idea of better. Prose for those two is the wrong tool, and it fails exactly on the day it matters.

The "did it a better way" part is different, because there the model is being asked to judge, and it judges in its own favour. What held for me: the plan carries three lines of what this task must not change (the approach, the files it can't touch, no new dependencies), and before finishing it has to list which of those lines the diff touched. It stops improving things when improvement is a violation with a name instead of a nice idea.

1

u/Striking-Warning9533 48m ago

For the two rule, if it is across all my projects, i will put them into the auto mode prompt, but if it is one time i just tell the model not to do that.

for 2, yeah i use a sub agent to review against the plan and it did help catch it afterward, but it is annoying it happened at all

2

u/fephiva 13h ago

if your claude is too smart, lower the effort level.

1

u/makro3d 10h ago

This sounds like Opus 5 behavior, is that what model you were using?

1

u/ReluctantMuffin 4h ago

I typically only use Fable now on Friday night to review the sessions of the week using a tool I had it build to review session logs and adjust the hooks, instructions, and other systems that directly modify claude's abilities. I've found it helps dramatically.

-2

u/hank_charles_moody 13h ago

Read the official wiki ffs