feat: add claude code and codex plugins

[willkill07]

Overview

Add NeMo Relay plugin installation and runtime support for Claude Code and Codex. The change adds host plugin manifests, marketplace generation, CLI install/uninstall/doctor commands, hook-supervised Codex startup, and Claude provider routing setup.

• I confirm this contribution is my own work, or I have the right to submit it under this project's license.
• I searched existing issues and open pull requests, and this does not duplicate existing work.

Details

• Add nemo-relay install, nemo-relay uninstall, and nemo-relay doctor --plugin flows for Codex, Claude Code, and all supported hosts.
• Add plugin-shim support for Codex hooks, lazy sidecar startup, Claude provider enable/restore, and hook forwarding.
• Add source marketplace manifests and standalone plugin documentation for Codex and Claude Code.
• Add CLI tests for plugin install behavior, plugin-shim behavior, gateway/session paths, and installer coverage.
• Update release and CI packaging paths for coding agent plugin assets.

Validation run locally:

cargo test -p nemo-relay-cli -- --test-threads=1
cargo clippy -p nemo-relay-cli --all-targets -- -D warnings
cargo fmt --all --check
git diff --check

Where should the reviewer start?

Start with crates/cli/src/plugin_install/mod.rs for install orchestration and crates/cli/src/plugin_shim/mod.rs for host-specific setup and hook handling. The Codex lazy-start path is in crates/cli/src/plugin_shim/codex.rs, and the generated marketplace/plugin files are covered by crates/cli/tests/coverage/plugin_install_tests.rs.

Related Issues: (use one of the action keywords Closes / Fixes / Resolves / Relates to)

• Relates to: none

[coderabbitai]

Important

Review skipped

Draft detected.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: ASSERTIVE

Plan: Enterprise

Run ID: b05847db-3030-48b0-8da3-18bf720cb073

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

---

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[github-actions]

Fern docs preview: https://nvidia-preview-pull-request-224.docs.buildwithfern.com/nemo/relay (​https://nvidia-preview-pull-request-224.docs.buildwithfern.com/nemo/relay​)