[BUG] Config mismatch: running npm-global but config says unknown (NVM + WSL2 environment)

Claude Code shows persistent config mismatch warning when installed via npm-global in NVM environment on WSL2. Tool functions correctly despite the warning.

Environment Info

Platform: Anthropic API
Claude CLI version: 1.0.77
Operating System: Windows 11 Pro (24H2, Build 26100.4652) + WSL2 Ubuntu 24.04.2 LTS
Terminal: Cursor IDE terminal connected to WSL2 Ubuntu
Shell: Zsh 5.9 with Oh My Zsh
Node.js: v22.17.1 (managed via NVM 0.40.3)
Installation method: npm install -g @anthropic-ai/claude-code
Installation path: /home/mp/.nvm/versions/node/v22.17.1/bin/claude

Steps to Reproduce

1. Install Claude Code via npm global in NVM environment: npm install -g @anthropic-ai/claude-code
2. Launch Claude Code: claude
3. Run /status command
4. Observe config mismatch warning in System Diagnostics section

Expected Behaviour

No config mismatch warning should appear when installation method is correctly detected.

Actual Behaviour

Warning displays: ⚠ Config mismatch: running npm-global but config says unknown ⚠❌

Diagnostic Output

/doctor command:

> /doctor 
  ⎿  (no content)

 Diagnostics
 └ Currently running: npm-global (1.0.77)
 └ Path: /home/mp/.nvm/versions/node/v22.17.1/bin/node
 └ Invoked: /home/mp/.nvm/versions/node/v22.17.1/bin/claude
 └ Config install method: unknown
 └ Auto-updates enabled: true
 └ Update permissions: Yes

 Memory Files · 0.7k tokens
 └ Project (/home/mp/projects/python/text-analyser/CLAUDE.md): 0.7k tokens

 Agent Configurations
 └ Loaded custom agents: 0

/status command:

 Claude Code v1.0.77
  L Session ID: [Redacted]

 Working Directory 
  L /home/mp/projects/python/text-analyser

 System Diagnostics • /doctor
  ⚠ Config mismatch: running npm-global but config says unknown [It's here ❌]

 IDE Integration • /config
  ✔ Connected to Cursor extension
  ✔ Installed Cursor extension

 Account • /login
  L Login Method: Claude Max Account
  L Organization: [Redacted]
  L Email: [Redacted]

 Memory • /memory
  L project: CLAUDE.md

 Model • /model
  L opusplan (claude-opus-4-1-20250805)

Additional Notes

• Claude Code functions normally despite the warning
• Issue appears to be detection logic not recognising NVM-based npm-global installations
• /migrate-installer resolves the issue but requires migration to local installation
• Related to previous issues #3915 (closed) and ongoing #4977 (custom npm prefix)

Workaround ✅

Running /migrate-installer resolves the warning by migrating to local installation.

Output from /doctor now:

> /doctor 
  ⎿  (no content)

 Diagnostics
 └ Currently running: npm-local (1.0.77)
 └ Path: /home/mp/.nvm/versions/node/v22.17.1/bin/node
 └ Invoked: /home/mp/.claude/local/node_modules/.bin/claude
 └ Config install method: local
 └ Auto-updates enabled: true

 Memory Files · 0.7k tokens
 └ Project (/home/mp/projects/python/text-analyser/CLAUDE.md): 0.7k tokens

 Agent Configurations
 └ Loaded custom agents: 0

Output form /status now:

> /status 
  ⎿  (no content)

 Claude Code v1.0.77
  L Session ID:  [Redacted]

 Working Directory 
  L /home/mp/projects/python/text-analyser

 IDE Integration • /config
  ✔ Connected to Cursor extension
  ✔ Installed Cursor extension

 Account • /login
  L Login Method: Claude Max Account
  L Organization: [redacted]
  L Email: [redacted]

 Memory • /memory
  L project: CLAUDE.md

 Model • /model
  L opusplan (claude-opus-4-1-20250805)