OAuth setup fails for Pi, Codex, and OpenCode with AUTH_FAILED

[dobleuber]

Summary

setup --harness fails consistently for Pi Agent, Codex CLI, and OpenCode with the same PluginError[AUTH_FAILED] error. This prevents authentication and completion of MCP configuration for all three harnesses.

Environment

• Node.js v22.22.3
• pnpm 9.15.9
• Plugin version 1.0.0
• Local repository checkout on main
• OpenCode 1.17.20
• Pi MCP adapter was already installed

Reproduction

Pi Agent

Using the local nsolid-plugin instance directly (without npx):

pnpm plugin:materialize
pi install ./packages/pi-plugin --no-approve
nsolid-plugin setup --harness pi

The setup was attempted twice. Both attempts produced:

NodeSource setup — pi
 → Reading bundle config …  3 MCP servers; skills owned by harness package
 → Checking NodeSource login …  sign-in required
Setup failed for pi:
  - Authentication failed: PluginError[AUTH_FAILED]: Authentication failed. Please try again.
Suggestion: Re-run installation to retry OAuth.

Codex CLI

Using the local Codex marketplace and the local nsolid-plugin instance directly (without npx):

codex plugin marketplace add /home/dobleuber/Projects/nodesource/nsolid-plugin
codex plugin add nsolid-plugin@nodesource
nsolid-plugin setup --harness codex

Plugin installation succeeded, but setup produced:

NodeSource setup — codex
 → Reading bundle config …  16 skills, 3 MCP servers
 → Checking NodeSource login …  sign-in required
Setup failed for codex:
  - Authentication failed: PluginError[AUTH_FAILED]: Authentication failed. Please try again.
Suggestion: Re-run installation to retry OAuth.

OpenCode

OpenCode uses the direct CLI installation path. Using the local nsolid-plugin instance directly (without npx):

nsolid-plugin setup --harness opencode

Setup produced:

NodeSource setup — opencode
 → Reading bundle config …  16 skills, 3 MCP servers
 → Checking NodeSource login …  sign-in required
Setup failed for opencode:
  - Authentication failed: PluginError[AUTH_FAILED]: Authentication failed. Please try again.
Suggestion: Re-run installation to retry OAuth.

Expected behavior

The explicit setup command should complete the NodeSource OAuth flow and write the shared credentials, followed by harness-specific MCP configuration.

Observed behavior

Native/local plugin installation succeeds for Pi and Codex; OpenCode reaches the direct CLI setup path, but authentication fails with the same generic error for all three harnesses. No successful setup or MCP configuration was produced.

Related issues

• Phase 2: Authentication Module #13 (Authentication Module)
• Epic 1: Cross Harness Plugin Installer #43 (Cross Harness Plugin Installer)

[coderabbitai]

🔗 Related PRs

#32 - feat: implement phase 5 - Harness Adapters [merged]
#35 - feat: enable MCP config for Pi Agent via ~/.pi/agent/mcp.json [merged]
#41 - update the syling for the redirect result and readmes [merged]
#46 - change structure for github install [merged]
#48 - remove staging flag, unnecesary docs and improve readme [merged]

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[dobleuber]

It's a local issue