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Jev model and reasoning-effort routing for Codex Desktop and CLI
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- Updated Oct 2026
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CommunityJev Agents & MCP
Jev Codex Bridge
Local bridge where TypeSafe Jev picks the model and reasoning effort for Codex Desktop and CLI sessions, reusing the existing Codex login.
- Stars
- 9
- Language
- JavaScript
- License
- MIT
- Published by
- Community
- Author
- ansidium
- Last verified
- Oct 2026
About this project
TypeSafe Jev selects a model and reasoning effort for Codex Desktop and CLI. The local bridge uses your existing Codex login. Windows setup includes a background service, tested updates and rollback. Requires Node.js 24+, npm, Git, Codex and a TypeSafe API key. Create /.jev-router.env outside your repositories. This policy limits automatic selection to GPT-6.1 Sol and GPT-6 Astra: Restart Codex Desktop after first-time setup. Select Jev Router to enable routing or a concrete model to choose manually.
Quoted from the project's README. Read the full README.
Used inJev for Software & DevTools
- Languages
- JavaScript
Highlights
- Selects a supported model-and-effort pair from task history and tool results, reassessing on new instructions and evidence.
- Existing Codex login reused; Windows setup adds a background service with validated updates and rollback.
- Policy, key files, context, and diagnostics documented under configuration, routing, and operations guides.
- Tests need no API keys and CI covers Windows, Linux, and macOS builds.
Watch out
Needs Node.js 24+, Git, Codex, and a TypeSafe key; routing text and model metadata go to TypeSafe while conversation goes to OpenAI. Copy reviewed against the repository README on 2026-10-04, not from running it.
Questions about this entry
Short answers drawn from the linked project or page.
Your reasoning selection sets the ceiling, and the bridge protects unfinished reasoning and observed cache reuse when stepping down. Quality upgrades stay eligible, and retries reuse decisions when evidence is unchanged.
It keeps the current eligible pair or the initial fallback and continues working. Run $jev-explain in Codex to see the decision details and routing context stored locally.
Create ~/.jev-router.env outside repos with TYPESAFE_API_KEY and a model policy such as the two-model include list, run jev-bridge install and status, then restart Codex Desktop and select Jev Router.
Existing tasks keep their provider until you close Codex on that task, run jev-bridge attach with the UUID from the task link, and reopen. On macOS and Linux install with --no-service and run serve under your own supervisor.
Node.js 24 or newer, npm, Git, Codex itself, and a TypeSafe API key. Then npm install --global git+https://github.com/ansidium/jev-codex-bridge.git --ignore-scripts, write the policy file, and run jev-bridge install followed by status. From the CLI side, jev-codex resume --last and jev-codex exec both route through it.
TypeSafe receives routing text and model metadata, OpenAI receives the Codex conversation, and decisions plus routing context are stored locally on your machine. The bridge reuses your existing Codex login rather than asking for a second credential.
Windows setup adds a background service with jev-bridge update and jev-bridge rollback. Validated updates activate once current requests finish, and rollback pauses automatic updates until jev-bridge auto-update on re-enables them. Reference material is split across configuration, routing and operations guides under docs.
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