### Preflight Checklist - [x] I have searched [existing issues](https://github.com/anthropics/claude-code/issues?q=is%3Aissue%20state%3Aopen%20label%3Abug) 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? There's a new feature in plan mode where Claude asks a few questions and you select the "radio" buttons one at a time. It seems while this is open, CC is

[BUG] 100% CPU Usage During Plan Mode Prompts

Status Fixed / completed

Maintainer reply None cached

Activity 9 comments · opened Oct 23, 2025 · closed Nov 24, 2025

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?

There's a new feature in plan mode where Claude asks a few questions and you select the "radio" buttons one at a time. It seems while this is open, CC is spinning one cpu core at 100%...

What Should Happen?

Claude should not occupy an entire cpu core while waiting for an answer.

Error Messages/Logs

Steps to Reproduce

Get claude to ask confirmation questions in plan mode.

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.0.25

Platform

Anthropic API

Operating System

Ubuntu/Debian Linux

Terminal/Shell

Other

Additional Information

_No response_

View original on GitHub ↗

9 Comments

github-actions[bot] · 10 months ago

Found 3 possible duplicate issues:

This issue will be automatically closed as a duplicate in 3 days.

If your issue is a duplicate, please close it and 👍 the existing issue instead
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🤖 Generated with Claude Code

fwends · 10 months ago

<img width="267" height="154" alt="Image" src="https://github.com/user-attachments/assets/a6a15028-b764-4e16-aba6-639ac871bddc" />
Absolute garbage these versions, they're running at stupid amounts of memory and stupid amounts of CPU.

kaihempel · 10 months ago

Same issue. Mostly during the spec-kit command clarify but also happens at other commands / promts too. The debug log shows a endless loop.

Error Log:

[DEBUG] Writing to temp file: /Users/kaihempel/.claude.json.tmp.21160.1761219387018 [DEBUG] Preserving file permissions: 100600 [DEBUG] Temp file written successfully, size: 33813 bytes [DEBUG] Applied original permissions to temp file [DEBUG] Renaming /Users/kaihempel/.claude.json.tmp.21160.1761219387018 to /Users/kaihempel/.claude.json [DEBUG] File /Users/kaihempel/.claude.json written atomically [DEBUG] UserCommandMessage rendering: "speckit.plan is running…" (args: "none") [DEBUG] isSkillFormat: false, prefix: "/" [DEBUG] UserCommandMessage rendering: "speckit.plan is running…" (args: "none") [DEBUG] isSkillFormat: false, prefix: "/" [DEBUG] UserCommandMessage rendering: "speckit.plan is running…" (args: "none") [DEBUG] isSkillFormat: false, prefix: "/" [DEBUG] UserCommandMessage rendering: "speckit.plan is running…" (args: "none") [DEBUG] isSkillFormat: false, prefix: "/" [DEBUG] UserCommandMessage rendering: "speckit.plan is running…" (args: "none") [DEBUG] isSkillFormat: false, prefix: "/" [DEBUG] Hooks: getAsyncHookResponseAttachments called [DEBUG] Hooks: checkForNewResponses called [DEBUG] Hooks: Found 0 total hooks in registry [DEBUG] Hooks: checkForNewResponses returning 0 responses [DEBUG] UserCommandMessage rendering: "speckit.plan is running…" (args: "none") [DEBUG] isSkillFormat: false, prefix: "/" [DEBUG] UserCommandMessage rendering: "speckit.plan is running…" (args: "none") [DEBUG] isSkillFormat: false, prefix: "/" [DEBUG] UserCommandMessage rendering: "speckit.plan is running…" (args: "none") [DEBUG] isSkillFormat: false, prefix: "/" [DEBUG] UserCommandMessage rendering: "speckit.plan is running…" (args: "none") [DEBUG] isSkillFormat: false, prefix: "/" [DEBUG] Getting matching hook commands for UserPromptSubmit with query: undefined [DEBUG] Found 0 hook matchers in settings [DEBUG] Matched 0 unique hooks for query "no match query" (0 before deduplication) [DEBUG] FileHistory: Making snapshot for message 0e7968b8-41c2-4841-bd18-ce7be01f2cce [DEBUG] FileHistory: Added snapshot for 0e7968b8-41c2-4841-bd18-ce7be01f2cce, tracking 0 files [DEBUG] Writing to temp file: /Users/kaihempel/.claude.json.tmp.21160.1761219387080 [DEBUG] Preserving file permissions: 100600 [DEBUG] Temp file written successfully, size: 33813 bytes [DEBUG] Applied original permissions to temp file [DEBUG] Renaming /Users/kaihempel/.claude.json.tmp.21160.1761219387080 to /Users/kaihempel/.claude.json [DEBUG] File /Users/kaihempel/.claude.json written atomically [DEBUG] UserCommandMessage rendering: "speckit.plan is running…" (args: "none") [DEBUG] isSkillFormat: false, prefix: "/" [DEBUG] UserCommandMessage rendering: "speckit.plan is running…" (args: "none") [DEBUG] isSkillFormat: false, prefix: "/" [DEBUG] UserCommandMessage rendering: "speckit.plan is running…" (args: "none") [DEBUG] isSkillFormat: false, prefix: "/" [DEBUG] UserCommandMessage rendering: "speckit.plan is running…" (args: "none") [DEBUG] isSkillFormat: false, prefix: "/" [DEBUG] UserCommandMessage rendering: "speckit.plan is running…" (args: "none") [DEBUG] isSkillFormat: false, prefix: "/" [DEBUG] Hooks: getAsyncHookResponseAttachments called [DEBUG] Hooks: checkForNewResponses called [DEBUG] Hooks: Found 0 total hooks in registry [DEBUG] Hooks: checkForNewResponses returning 0 responses [DEBUG] UserCommandMessage rendering: "speckit.plan is running…" (args: "none") [DEBUG] isSkillFormat: false, prefix: "/" [DEBUG] UserCommandMessage rendering: "speckit.plan is running…" (args: "none") [DEBUG] isSkillFormat: false, prefix: "/" [DEBUG] UserCommandMessage rendering: "speckit.plan is running…" (args: "none") [DEBUG] isSkillFormat: false, prefix: "/" [DEBUG] UserCommandMessage rendering: "speckit.plan is running…" (args: "none") [DEBUG] isSkillFormat: false, prefix: "/" [DEBUG] Getting matching hook commands for UserPromptSubmit with query: undefined [DEBUG] Found 0 hook matchers in settings [DEBUG] Matched 0 unique hooks for query "no match query" (0 before deduplication) [DEBUG] FileHistory: Making snapshot for message 40a353a2-a669-4666-b442-8a3a53ef68a0 [DEBUG] FileHistory: Added snapshot for 40a353a2-a669-4666-b442-8a3a53ef68a0, tracking 0 files [DEBUG] Writing to temp file: /Users/kaihempel/.claude.json.tmp.21160.1761219387152 [DEBUG] Preserving file permissions: 100600 [DEBUG] Temp file written successfully, size: 33813 bytes [DEBUG] Applied original permissions to temp file [DEBUG] Renaming /Users/kaihempel/.claude.json.tmp.21160.1761219387152 to /Users/kaihempel/.claude.json [DEBUG] File /Users/kaihempel/.claude.json written atomically [DEBUG] UserCommandMessage rendering: "speckit.plan is running…" (args: "none") [DEBUG] isSkillFormat: false, prefix: "/" [DEBUG] UserCommandMessage rendering: "speckit.plan is running…" (args: "none") [DEBUG] isSkillFormat: false, prefix: "/" [DEBUG] UserCommandMessage rendering: "speckit.plan is running…" (args: "none") [DEBUG] isSkillFormat: false, prefix: "/" [DEBUG] UserCommandMessage rendering: "speckit.plan is running…" (args: "none") [DEBUG] isSkillFormat: false, prefix: "/" [DEBUG] UserCommandMessage rendering: "speckit.plan is running…" (args: "none") [DEBUG] isSkillFormat: false, prefix: "/" [DEBUG] Hooks: getAsyncHookResponseAttachments called [DEBUG] Hooks: checkForNewResponses called [DEBUG] Hooks: Found 0 total hooks in registry [DEBUG] Hooks: checkForNewResponses returning 0 responses [DEBUG] UserCommandMessage rendering: "speckit.plan is running…" (args: "none") [DEBUG] isSkillFormat: false, prefix: "/" [DEBUG] UserCommandMessage rendering: "speckit.plan is running…" (args: "none") [DEBUG] isSkillFormat: false, prefix: "/" [DEBUG] UserCommandMessage rendering: "speckit.plan is running…" (args: "none") [DEBUG] isSkillFormat: false, prefix: "/" [DEBUG] UserCommandMessage rendering: "speckit.plan is running…" (args: "none") [DEBUG] isSkillFormat: false, prefix: "/" [DEBUG] Getting matching hook commands for UserPromptSubmit with query: undefined [DEBUG] Found 0 hook matchers in settings [DEBUG] Matched 0 unique hooks for query "no match query" (0 before deduplication) [DEBUG] FileHistory: Making snapshot for message 3ef1c3d1-9c4c-4c70-975d-866fc4049082 [DEBUG] FileHistory: Added snapshot for 3ef1c3d1-9c4c-4c70-975d-866fc4049082, tracking 0 files [DEBUG] Writing to temp file: /Users/kaihempel/.claude.json.tmp.21160.1761219387205 [DEBUG] Preserving file permissions: 100600 [DEBUG] Temp file written successfully, size: 33813 bytes [DEBUG] Applied original permissions to temp file [DEBUG] Renaming /Users/kaihempel/.claude.json.tmp.21160.1761219387205 to /Users/kaihempel/.claude.json [DEBUG] File /Users/kaihempel/.claude.json written atomically

The following line was in every log i viewed to investigate this bug:
[DEBUG] Getting matching hook commands for UserPromptSubmit with query: undefined

Claude Code Version:

2.0.24 and 2.0.25

chuchiring · 10 months ago

same here

winrid · 10 months ago

This is still an issue. Just getting a prompt spins my laptop fans at full speed...

SuperElephant · 10 months ago

same in 2.0.29

winrid · 9 months ago

This is still an issue on the latest version. It will literally sit there for hours if I let it doing absolutely nothing but maxing out a core on my i7.