[Bug]: Claude Efforts Low and Medium Brocken

[Xelef2000]

Before submitting

• I searched existing issues and did not find a duplicate.
• I included enough detail to reproduce or investigate the problem.

Area

apps/desktop

Steps to reproduce

Method 1:

1. Start App
2. Create Project
3. Select Claude
4. Select Claude Sonnet 4.6 or Claude Opus 4.6
5. Set effort to medium or low
6. Ask prompt

Method 2:

1. Start App
2. Create Project
3. Select Claude
4. Select Claude Sonnet 4.6 or Claude Opus 4.6
5. Leave effort at default (high) or select Ultrathink
6. Ask prompt
7. Change Effort to low or medium
8. Ask prompt

Expected behavior

Claude should respond to the prompt.

Actual behavior

Claude Code crashes.

With method 1 the thread is completely dead and Claude crashes even if the effort is set to high again
With method 2 the thread works again as soon as the effort is set to high again (although the agent needs to be reprompted)

Impact

Major degradation or frequent failure

Version or commit

T3 Code v0.0.14

Environment

Linux (fedora 43), T3 Code AppImage downloaded from this repo, Claude

Logs or stack traces

Method 1:
Provider turn start failed - Error: claudeAgent adapter thread is closed: 802{Redacted Thread ID}53 at toSessionError$1 (file:///tmp/.mount_T3-Codtj7KBO/resources/app.asar/apps/server/dist/index.mjs:10846:44) at toRequestError$1 (file:///tmp/.mount_T3-Codtj7KBO/resources/app.asar/apps/server/dist/index.mjs:10853:23) at catch (file:///tmp/.mount_T3-Codtj7KBO/resources/app.asar/apps/server/dist/index.mjs:12256:23) at file:///tmp/.mount_T3-Codtj7KBO/resources/app.asar/node_modules/effect/dist/internal/effect.js:685:103 { [cause]: Error: Query closed before response received at h4.cleanup (file:///tmp/.mount_T3-Codtj7KBO/resources/app.asar/node_modules/@anthropic-ai/claude-agent-sdk/sdk.mjs:19:12284) at h4.readMessages (file:///tmp/.mount_T3-Codtj7KBO/resources/app.asar/node_modules/@anthropic-ai/claude-agent-sdk/sdk.mjs:19:14398) at process.processTicksAndRejections (node:internal/process/task_queues:103:5) }

And the banner with: Claude Code process exited with code 1

Method 2:
Only the banner with: Claude Code process exited with code 1

Screenshots, recordings, or supporting files

Method-1.png
Method-1-restart.png
Method-2.png
Method-2-restart.png

Workaround

Only use high effort with Claude models