tweak: include anthropic spoof for providers including "anthropic" in name

[Gardelll]

Prefix compaction/summarize/title system instruction with PROMPT_ANTHROPIC_SPOOF to support proxied Anthropic provider.

[rekram1-node]

The anthropic spoof is there solely for coding max/pro plans, are you running opencode through a proxy to your max plan? Because you may not really want that spoof unless you're doing that

[Gardelll]

The anthropic spoof is there solely for coding max/pro plans, are you running opencode through a proxy to your max plan? Because you may not really want that spoof unless you're doing that

Yes, it sounds unsafe, but there is indeed such a need.

[rekram1-node]

I don't know if we should be including it all the time, for example: google-vertex-anthropic is a valid provider, no reason to attach it in that case

[rekram1-node]

that is the only provider I see this being an issue for, but fr? You have a proxy setup that uses claude code subscriptions?

[Gardelll]

I don't know if we should be including it all the time, for example: google-vertex-anthropic is a valid provider, no reason to attach it in that case

Maybe we should use another option to include this spoof for custom providers?

that is the only provider I see this being an issue for, but fr? You have a proxy setup that uses claude code subscriptions?

I am using a config like this to bypass regional restrictions:

"anthropic-proxy": {
  "npm": "@ai-sdk/anthropic",
  "name": "ProxiedClaudeCode",
  "options": {
    "baseURL": "https://proxied-claude-endpoint/v1",
    "headers": {
      // claude code cli headers
    }
  },
  "models": {
    // ...
  }
}

It is working fine but excludes title generation, etc.

[rekram1-node]

ig this is fine, should prolly just exclude the case I mentioned