feat: align Codex plugin with Claude OAuth and bundled CLI

[ravern]

The Codex plugin currently requires an API-key environment variable and a separately installed CLI. Align it with the Claude plugin: use MCP OAuth discovery and bundle the exact npm greptile@3.5.2 artifact.

Replace check-pr, cli-review, and greploop with small login and review skills, the Codex equivalents of Claude’s command prompts. Update both READMEs, rename the marketplace to greptile-plugin while keeping the plugin name greptile, and bump the plugin to 0.2.0.

Validation: plugin and skill validators pass; all CLI Check and MCP Check shell steps pass locally, including npm byte equality, relocated login/review help, the public OAuth challenge, and all 19 documented MCP tools. Browser OAuth completion and a paid review have not been exercised.

Existing users of greptile-codex-plugins need to remove the old plugin/marketplace registration, add greptileai/codex-plugin, and install greptile@greptile-plugin.

[greptile-apps]

Greptile Summary

Aligns the Codex plugin with Greptile’s OAuth-based MCP integration and bundles the pinned Greptile CLI.

• Renames the repository and marketplace identifiers as intentionally requested and documents migration commands.
• Replaces the prior PR-oriented skills with focused login and review skills.
• Vendors greptile@3.5.2 and adds CI checks for provenance, relocated execution, OAuth discovery, and MCP tool documentation.
• Updates plugin metadata and documentation for the separate CLI and MCP OAuth flows.

Confidence Score: 5/5  · 

The PR appears safe to merge with no outstanding findings.

No changes were made after the previous review, so there are no new regressions to report. The workflow-style finding was manually resolved without explanation. ravern explained that the marketplace rename is an intentional owner-requested breaking change with migration documentation, accepted that behavior as-is, and resolved the thread.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart LR
  User[Codex user] --> Plugin[Greptile Codex plugin]
  Plugin --> LoginSkill[login skill]
  Plugin --> ReviewSkill[review skill]
  Plugin --> MCP[Greptile MCP server]
  LoginSkill --> CLI[Bundled greptile 3.5.2 CLI]
  ReviewSkill --> CLI
  CLI --> CLIAuth[CLI browser OAuth]
  CLIAuth --> Auth[auth.greptile.com]
  MCP --> MCPAuth[Codex-managed MCP OAuth]
  MCPAuth --> Auth
  CLI --> API[api.greptile.com]
  MCP --> API

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_{Reviews (5): Last reviewed commit: "chore: rename marketplace to greptile-pl..." | Re-trigger Greptile}

[ravern]

@greptile review

Please review the current requirements: the repository rename to codex-plugin and marketplace rename to greptile-plugin are intentional owner requests, with migration documented.