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Office vs. Home Network

Use different MCP servers depending on which network you're on, with no manual toggling.

Config​

# ~/.config/llmenv/config.yaml

scope:
  network:
    - name: office
      gateway_mac: "aa:bb:cc:dd:ee:ff"   # your office router's MAC
      tags: [office]
    - name: home
      gateway_mac: "11:22:33:44:55:66"   # your home router's MAC
      tags: [home]

mcp:
  - name: internal-docs
    tags: [office]
    transport: stdio
    command: npx
    args: ["-y", "my-company-docs-mcp"]

  - name: home-assistant
    tags: [home]
    transport: stdio
    command: uvx
    args: ["home-assistant-mcp"]

How it works​

  1. On every shell prompt, llmenv runs llmenv export.
  2. It detects the current gateway MAC and matches it to a network scope.
  3. The matching scope adds office or home to the active tag set.
  4. The MCP server whose tags intersect the active set is included; the other is not.
  5. The adapter writes mcp.json into the config directory. Claude Code picks it up on the next session.

If you're on an unknown network (traveling, coffee shop) neither scope matches and neither MCP loads.

Verify​

llmenv doctor            # confirm which scopes and MCPs are active
llmenv export --dry-run  # preview the manifest that would be written

Tips​

  • Run ip neigh show default (Linux) or arp -n $(route -n get default | grep gateway | awk '{print $2}') (macOS) to find your router's MAC.
  • You can stack multiple network scopes — if you have a VPN that changes the gateway, add it as a third entry with its own tags.