feat: add Claude API bridge - transparent OpenAI-to-Anthropic protocol conversion

When provider is set to "claude" in config, all OpenAI-compatible API calls
are automatically bridged to Anthropic Claude Messages API, including:

- Non-streaming and streaming chat completions
- Tool calls (function calling) with full bidirectional conversion
- Eino multi-agent via HTTP transport hook (claudeRoundTripper)
- System message extraction, auth header conversion (Bearer → x-api-key)
- SSE stream format conversion (content_block_delta → OpenAI delta)
- TestOpenAI handler support for Claude connectivity testing

Zero impact when provider is "openai" or empty (default behavior unchanged).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
donnel
2026-04-16 09:54:37 +08:00
parent 715240dc5e
commit 4442e7de30
8 changed files with 1140 additions and 56 deletions
File diff suppressed because it is too large Load Diff
+9
View File
@@ -64,6 +64,9 @@ func (c *Client) ChatCompletion(ctx context.Context, payload interface{}, out in
if strings.TrimSpace(c.config.APIKey) == "" {
return fmt.Errorf("openai api key is empty")
}
if c.isClaude() {
return c.claudeChatCompletion(ctx, payload, out)
}
baseURL := strings.TrimSuffix(c.config.BaseURL, "/")
if baseURL == "" {
@@ -156,6 +159,9 @@ func (c *Client) ChatCompletionStream(ctx context.Context, payload interface{},
if strings.TrimSpace(c.config.APIKey) == "" {
return "", fmt.Errorf("openai api key is empty")
}
if c.isClaude() {
return c.claudeChatCompletionStream(ctx, payload, onDelta)
}
baseURL := strings.TrimSuffix(c.config.BaseURL, "/")
if baseURL == "" {
@@ -294,6 +300,9 @@ func (c *Client) ChatCompletionStreamWithToolCalls(
if strings.TrimSpace(c.config.APIKey) == "" {
return "", nil, "", fmt.Errorf("openai api key is empty")
}
if c.isClaude() {
return c.claudeChatCompletionStreamWithToolCalls(ctx, payload, onContentDelta)
}
baseURL := strings.TrimSuffix(c.config.BaseURL, "/")
if baseURL == "" {