Append data exceeds maximum size of 52428801 bytes

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Cursor is broken. Guess it is due the huge amount of skills I installed to use and test.

Steps to Reproduce

Anytime I ask anything, even an “Hi”

Expected Behavior

It should reply properly, but it is not.

Screenshots / Screen Recordings

Operating System

Windows 10/11

Version Information

Version: 3.0.4 (user setup)
VSCode Version: 1.105.1
Commit: 63715ffc1807793ce209e935e5c3ab9b79fddc80
Date: 2026-04-02T09:36:23.265Z
Layout: editor
Build Type: Stable
Release Track: Default
Electron: 39.8.1
Chromium: 142.0.7444.265
Node.js: 22.22.1
V8: 14.2.231.22-electron.0
OS: Windows_NT x64 10.0.26100

For AI issues: which model did you use?

I have tried Sonnet, Opus and GPT. None of them work.

For AI issues: add Request ID with privacy disabled

Request ID: e9e461db-fc0b-4452-ae06-2b8810ff92bc

Does this stop you from using Cursor

Yes - Cursor is unusable

Hi @luciano.guerche Thanks for the post. Yes, you are correct that it is very likely the 2,000-plus skills you have installed that are overloading the context window. Even though the full context of each skill is not sent in the prompt, a summary of each one is (because the agent needs to be able to know what skills it has access to), and the summary alone can consume more than the available context window for the model when adding up all those skills.

I understand you’re experimenting with a lot of different skills, so I wanted to give you a couple of options that help preserve your optionality. You could move a lot of those skills out and only work with a smaller number at a time, of course (100, 200 maybe?)

You could also disable model invocation. This will mean that the skill is not discoverable by the model (e.g. the skill summary is not included in the prompt) BUT you can still invoke it manually with the slash command /myskill.

To disable model invocation , go to the skill.md file, and set disable model invocation to true.

description: My skill description

disable-model-invocation: true

Let me know if you have any follow-up questions.