Add ClaudeProvider implementing Provider interface via anthropic-sdk-go

[Copilot]

Adds ClaudeProvider to the providers package using github.com/anthropics/anthropic-sdk-go, implementing the same Provider interface as GoogleProvider.

New: ClaudeProvider

• Name() → "claude"
• ChatCompletion() — maps to client.Messages.New() with model, content, system instruction, and temperature
• SubmitBatchJob() — maps to client.Messages.Batches.New(); assigns sequential CustomIDs to batch requests; uses configurable MaxTokens (default 8192)
• GetBatchJobStatus() — polls client.Messages.Batches.Get(); on ended status, streams results via ResultsStreaming(), aggregates input/output token counts, and JSON-serializes []MessageBatchIndividualResponse into ResultsJSON

Config

Added ClaudeConfig{APIKey, MaxTokens} to ProvidersConfig and config/default.yaml:

providers:
  claude:
    api_key: your-claude-api-key
    max_tokens: 8192

Constructor

provider, err := providers.NewClaude(cfg.Providers.Claude)

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• platform.claude.com
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node /home/REDACTED/work/_temp/ghcca-node/node/bin/node --enable-source-maps /home/REDACTED/work/_temp/copilot-developer-action-main/dist/index.js (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

Please create ClaudeProvider in package #file:providers and implement interface Provider. We can use package github.com/anthropics/anthropic-sdk-go.

We can use GoogleProvider as code reference.

Also, for claude we can use references from website https://platform.claude.com/docs/en/api/sdks/go

For now, we can skip unittest

The user has attached the following files from their workspace:

• internal/aigateway/providers/providers.go
• internal/aigateway/providers