claude-code - 💡(How to fix) Fix [BUG] API Error Prompt is too long [1 participants]

Official PRs (…)
ON THIS PAGE

Recommended Tools

×6

Utilities matched from this issue’s tags and category — try them while you read without losing context.

GitHub issue graph ai analysis

Paste a GitHub issue URL. We fetch that issue, discover linked issues from bodies/comments/timeline, collect linked pull requests, and produce a structured English report.

The report is written in English Markdown for sharing and archival.

Helpful · Quick feedback

Loading…
GitHub stats
anthropics/claude-code#51919Fetched 2026-04-23 07:41:23
View on GitHub
Comments
0
Participants
1
Timeline
5
Reactions
0
Author
Participants
Timeline (top)
labeled ×5

Error Message

On the windows desktop app (probably also on mac). There is a error that the prompt is too long while the agent is running. But the context is only filled to 51% (101.5k tokens). This happens often on long running tasks. there is no option to auto compact, or just remove older context so this screws up the workflow.

Error Messages/Logs

API Error

Code Example

API Error
Prompt is too long
RAW_BUFFERClick to expand / collapse

Preflight Checklist

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

What's Wrong?

On the windows desktop app (probably also on mac). There is a error that the prompt is too long while the agent is running. But the context is only filled to 51% (101.5k tokens). This happens often on long running tasks. there is no option to auto compact, or just remove older context so this screws up the workflow. This started happening on the new desktop app, never had this issue before.

What Should Happen?

Agent should continue running and the desktop app should have features to mitigate this behaviour.

Error Messages/Logs

API Error
Prompt is too long

Steps to Reproduce

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

No response

Claude Code Version

Claude 1.3883.0 (93ff6c)

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Other

Additional Information

No response

extent analysis

TL;DR

The issue can likely be mitigated by implementing a feature to auto-compact or remove older context in the desktop app to prevent the "prompt is too long" error.

Guidance

  • Investigate the Anthropic API documentation to see if there are any existing parameters or endpoints that can be used to limit the context size or implement auto-compaction.
  • Consider adding a feature to the desktop app to manually remove older context or compact it when the context size reaches a certain threshold.
  • Review the changes made in the new desktop app version to identify what might be causing this regression and if there's a way to revert or modify those changes.
  • Test the app with a smaller context size to see if the error still occurs and to determine the exact threshold for the "prompt is too long" error.

Example

No code example can be provided without more information about the app's codebase.

Notes

The solution may require modifications to the desktop app or the way it interacts with the Anthropic API. Without more information about the app's code and the API's capabilities, it's difficult to provide a more specific solution.

Recommendation

Apply workaround: Implement a feature to auto-compact or remove older context in the desktop app, as this is likely to mitigate the issue and improve the overall workflow.

Vote matrix · Quick signals

Works
Did the solution work? Tap to confirm.
Easy Fix
Was it a quick fix?
Time Saver
Did it save you time?
Blocking
Was it severely blocking?
Common Issue
Are others likely hitting this too?
Flaky / Intermittent
Is it intermittent?
Verified / Reproducible
Can you reproduce it reliably?
Loading…

Still need to ship something?

×6

Another batch ranked right after the header list — different links, same matching logic.

Back to top recommendations

TRENDING