Opencode Desktop Write Tool Not Persisting Files

[jrobson-objective]

Description

Critical Bug Report:
Bug Summary
The Write tool reports success but files are not actually written to disk. This causes complete loss of work when sessions end or hit context limits.

Evidence
This session: Used Write tool 13 times - all reported "Wrote file successfully"
Verification: Only 2 files exist on disk (both created with bash heredoc, not Write tool)
Previous session: Same issue - extensive work reported as complete, but all files disappeared

Impact
Severe: Complete loss of development work
Users cannot trust Write tool output
Makes agent appear unreliable
Forces use of bash heredoc workarounds

Plugins

@tarquinen/opencode-dcp@latest

OpenCode version

1.2.15

Steps to reproduce

1. Use Write tool to create any file
2. Tool reports: "Wrote file successfully"
3. Check filesystem: file doesn't exist
4. Use bash heredoc to create same file: works correctly

Screenshot and/or share link

Operating System

Windows 11

Terminal

OpenCode Desktop

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• Ollama (qwen2.5-coder): tool calls (edit/write) show as executed but no files are created/modified #7030: Tool calls (edit/write) show as executed but no files are created/modified — same core symptom where the Write tool reports success but files are not actually written to disk

If your issue is specific to OpenCode Desktop or the plugin you're using (@tarquinen/opencode-dcp), it may be a distinct bug. Please review the linked issue and let us know if it covers your situation.

[nexxeln]

Could you provide a bit more detail about this setup? Are you using Ollama?

[neriousy]

What model? Maybe tool calling is not enabled on your AI instance