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feat: add custom models for codex and claude code #150

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feat: add custom models for Codex and Claude Code
Sep 9, 2026
7ee52aa
Stop catalog probes from rerunning when custom models change.
Sep 10, 2026
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31 changes: 31 additions & 0 deletions NOTICE
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Expand Up @@ -2,3 +2,34 @@ MonoCode is not affiliated with, endorsed by, or sponsored by the makers of the
agent harnesses it can drive.

Provider marks that appear in the UI (including Claude, Codex, Cursor, GitHub, GitLab, Linear, Grok, OpenCode, Pi, omp, and fx) are trademarks of their respective owners and are used only to identify those products.

Custom model management includes code adapted from T3 Code:
https://github.com/pingdotgg/t3code
Reference commit: e16b8b05
Sources: packages/shared/src/model.ts,
apps/web/src/components/settings/customModelEditor.logic.ts,
apps/web/src/components/settings/CustomModelEditor.tsx,
apps/web/src/components/settings/ProviderModelsSection.tsx,
apps/server/src/provider/Layers/CodexProvider.ts.

MIT License

Copyright (c) 2026 T3 Tools Inc.

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
4 changes: 4 additions & 0 deletions README.md
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Expand Up @@ -40,6 +40,10 @@ This is very early and you should expect bugs.

Small, focused pull requests are welcome. Anything large is worth an issue first - see [CONTRIBUTING.md](CONTRIBUTING.md).

### Custom models

In Settings → Providers, use **Add model** under Codex or Claude Code to add an exact model ID supported by your CLI configuration. Custom models appear in the model picker and can be favorited or used by default. Expand **Custom models** to edit a display name and composer options (such as reasoning or fast mode), copy options from a discovered model, or remove an entry. Configure authentication and any custom endpoints in the provider's CLI as usual.

## Build from source

Supports macOS, Linux, and Windows.
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