Make Bedrock a composite provider: Converse + Anthropic Messages API #82
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…sages API Bedrock now routes anthropic.* models through the Anthropic Messages API (/invoke, /invoke-with-response-stream) while non-Anthropic models continue using the Converse API. This enables full Anthropic feature support (extended thinking, prompt caching, etc.) for Claude models on Bedrock. Key changes: - Router uses spec.format instead of provider.format() for request transformation - Add add_provider_for_format() to let one provider serve multiple formats - BedrockProvider detects mode from model name and switches URL/payload accordingly - New bedrock_messages_event_stream for invoke-with-response-stream decoding - Update catalog: anthropic.* Bedrock models now have format "anthropic" Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
anthropic.*models through the Anthropic Messages API (/invoke,/invoke-with-response-stream) while non-Anthropic models (amazon., meta., etc.) continue using the Converse APIspec.formatinstead ofprovider.format()for request transformation, allowing a single provider to serve models with different formats viaadd_provider_for_format()anthropic.*Bedrock models now have format"anthropic"instead of"converse"Test plan
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