feat: add AWS Bedrock provider integration (#395)

Co-authored-by: Scott Nelson <snelson@Scotts-MacBook-Pro.local>

Author: scottiducati

src/ax-ai-aws-bedrock/.npmignore

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+*.test.ts
+*.test-d.ts
+tsconfig.json
+tsup.config.ts
+.gitignore
+.npmignore
+src/
+

src/ax-ai-aws-bedrock/.prettierignore

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+# Package files are formatted by package managers
+package.json
+package-lock.json
+yarn.lock
+pnpm-lock.yaml
+
+# Build outputs and distributions
+dist
+build
+
+# Generated indexes
+index.ts
+
+# Dependencies
+node_modules
+.pnpm-store
+
+# Documentation
+docs
+
+# Cache directories
+.cache
+.temp

src/ax-ai-aws-bedrock/README.md

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+# AWS Bedrock Provider for AX
+
+Production-ready AWS Bedrock integration for AX library. Supports Claude, GPT OSS, and Titan Embed models.
+
+## Features
+
+- **Claude models**: Sonnet 3.5, 3.7, 4.0
+- **GPT OSS models**: 120B, 20B
+- **Embeddings**: Titan Embed V2
+- Regional failover (separate configs for Claude and GPT)
+- Token usage tracking
+- Works with AX signatures, flows, and optimizers
+
+## Installation
+
+```bash
+npm install @ax-llm/ax-ai-aws-bedrock @ax-llm/ax @aws-sdk/client-bedrock-runtime
+```
+
+## Quick Start
+
+```typescript
+import { AxAIBedrock, AxAIBedrockModel } from '@ax-llm/ax-ai-aws-bedrock';
+
+const ai = new AxAIBedrock({
+  region: 'us-east-2',
+  fallbackRegions: ['us-west-2', 'us-east-1'],
+  config: {
+    model: AxAIBedrockModel.ClaudeSonnet4,
+    temperature: 0.7,
+    maxTokens: 4096,
+  },
+});
+
+const response = await ai.chat({
+  chatPrompt: [
+    { role: 'system', content: 'You are a helpful assistant.' },
+    { role: 'user', content: 'What is AWS Bedrock?' },
+  ],
+});
+```
+
+## With AX Signatures
+
+```typescript
+import { AxSignature, AxGen } from '@ax-llm/ax';
+
+const ai = new AxAIBedrock({ config: { model: AxAIBedrockModel.ClaudeSonnet4 } });
+const summarize = new AxSignature('document: string -> summary: string');
+const program = new AxGen(summarize, { ai });
+
+const result = await program.forward({ document: 'Your text...' });
+```
+
+## Available Models
+
+```typescript
+// Claude
+AxAIBedrockModel.ClaudeSonnet4; // us.anthropic.claude-sonnet-4-20250514-v1:0
+AxAIBedrockModel.Claude37Sonnet; // anthropic.claude-3-7-sonnet-20250219-v1:0
+AxAIBedrockModel.Claude35Sonnet; // anthropic.claude-3-5-sonnet-20240620-v1:0
+
+// GPT OSS
+AxAIBedrockModel.GptOss120B; // openai.gpt-oss-120b-1:0
+AxAIBedrockModel.GptOss20B; // openai.gpt-oss-20b-1:0
+
+// Embeddings
+AxAIBedrockEmbedModel.TitanEmbedV2; // amazon.titan-embed-text-v2:0
+```
+
+## Testing
+
+```bash
+bun test packages/api/src/agent/ax-main/src/ax/ai/bedrock/api.test.ts
+```
+
+See `examples.ts` and `QUICKSTART.md` for more examples.