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OMO Configuration Cannot Add Custom subagents - OpenCode

Quick fix

As a temporary workaround, write all configuration in “Other fields”, but this overwrites the UI configuration above.

Symptom

Section titled “Symptom”
Error output
在下方json编辑区内手动添加"fallback_models"等配置点击保存，实际并未保存；
English translation

Manually add configuration such as "fallback_models" in the JSON editor below and click Save, but it is not actually saved;

Cause

Section titled “Cause”

This report concerns OpenCode oh-my-opencode (OMO) configuration editing: after a custom subagent input loses focus, its UI disappears; `fallback_models` added in the JSON editor is not saved; and saving may overwrite existing manual configuration. The reporter considers this to include 4 issues. A maintainer marked it as a duplicate of #3063, but that number is not included in this page’s evidence, so its resolution status cannot be confirmed.

Fix

Section titled “Fix”

  1. As the reporter’s current temporary workaround, write all OMO configuration in “Other fields”. Note that this overwrites all UI configuration above.

  2. For custom subagents, `fallback_models` saving, and existing configuration import/overwrite issues, the original post provides no verifiable official solution. Follow progress on the main issue referenced by the maintainer in the source issue.

Affected Versions

Section titled “Affected Versions”
ToolOpenCode
Version3.16.4（报告出现问题的版本）
PlatformsmacOS

Source Issues

Section titled “Source Issues”

This page is distilled from 1 real issues

FAQ

Section titled “FAQ”

(No FAQ yet)

Section titled “Related problems”
Top-level model.provider not updated for Hermes DesktopThis report was closed as a duplicate. No verifiable solution was provided; track root-cause issue #5142.1 issues mergedBlank or missing model names in /models — OpenCode v2Remove empty name fields from the OpenCode configuration to restore names. Saving again in CC Switch brings the issue back; no official fix is documented.1 issues mergedConfig file sync delay: CC Switch cloud sync directoryAfter upgrading to 4.0, try built-in WebDAV / S3 cloud sync. If you still use a third-party cloud drive directory, retest and report the drive, version, and…2 issues merged

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