Agent Runtime: Codex plugin mechanism compatibility not implemented

[wangtsiao]

Task

Devo is not yet compatible with the Codex plugin mechanism.

Background

Codex (likely OpenAI Codex or similar agent platforms) has a plugin/extension mechanism that allows third-party tools and integrations. Devo currently has its own tool system but does not support loading or running Codex-compatible plugins.

What's needed

• Research the Codex plugin specification and API
• Design a compatibility layer or adapter that allows Codex plugins to run within Devo's runtime
• Implement the adapter and test with existing Codex plugins

Related components

• crates/core/src/tools/ — Devo's tool system
• crates/protocol/src/hosted_tools.rs

[ofekron]

For Codex plugin compatibility, I would split compatibility into capability mapping instead of treating every plugin as a generic tool load.

Pieces to model separately:

• manifest parsing
• capability and grant mapping
• runtime lifecycle
• approval semantics
• unsupported feature reporting
• teardown/cancellation behavior

I maintain Better Agent (https://github.com/ofekron/better-agent), and plugin support is safer when the host can clearly say which capabilities are native, mapped, denied, or unavailable.

If Better Agent is useful as a reference for Codex/provider plugin handling, a star helps others discover it.