Switch to Claude Sonnet 4.5 cross-region inference profile

- Update foundation model to us.anthropic.claude-sonnet-4-5-20250929-v1:0
  (cross-region inference profile required for Claude 4.x on Bedrock Agents)
- Broaden agent role IAM policy to cover wildcard-region foundation model ARN
  and inference profile ARN
- Force alias version bump via description change so CloudFormation creates
  agent version 2 with the updated model
- Remove invalid includedType: 'contractor' from Google Maps Places API request
  (caused 400 Bad Request — not a valid place type for searchText endpoint)

README.md

@@ -17,7 +17,7 @@ slack-webhook Lambda          ← verifies Slack signature, returns 200 immediat
 slack-processor Lambda        ← calls Bedrock Agent, logs to DynamoDB, posts reply
    │
    ▼
-Bedrock Agent (Claude 3.5 Sonnet)
+Bedrock Agent (Claude Sonnet 4.5)
    ├── Knowledge Base (AOSS + S3)    ← SA8000 docs, SOPs, employee handbook
    ├── QBO_Lookup action group       ← QuickBooks vendor search
    └── Google_Maps_Lookup action group ← fallback vendor search
@@ -34,7 +34,7 @@ Bedrock Agent (Claude 3.5 Sonnet)
 |---|---|
 | AWS Account | 328440206208, us-east-1 |
 | CDK | TypeScript, v2 |
-| LLM | Claude 3.5 Sonnet v2 (`anthropic.claude-3-5-sonnet-20241022-v2:0`) |
+| LLM | Claude Sonnet 4.5 (`anthropic.claude-sonnet-4-5-20250929-v1:0`) |
 | Embeddings | Amazon Titan Embed Text V2 (1024 dimensions) |
 | Vector Store | OpenSearch Serverless (VECTORSEARCH) |
 | Conversation Log | DynamoDB `seahaven-conversations` (90-day TTL) |

lambda/maps-lookup/index.ts

@@ -97,8 +97,6 @@ async function searchPlaces(
     body: JSON.stringify({
       textQuery: `${trade} near ${location}`,
       maxResultCount: 5,
-      // Bias toward business results
-      includedType: 'contractor',
     }),
   });
 

lib/constructs/bedrock-agent.ts

@@ -20,8 +20,8 @@ export class BedrockAgentConstruct extends Construct {
   public readonly qboLambda: lambdaNodejs.NodejsFunction;
   public readonly mapsLambda: lambdaNodejs.NodejsFunction;
 
-  // Foundation model used for orchestration
-  private static readonly MODEL_ID = 'anthropic.claude-3-5-sonnet-20241022-v2:0';
+  // Cross-region inference profile — required for Claude 4.x on Bedrock Agents
+  private static readonly MODEL_ID = 'us.anthropic.claude-sonnet-4-5-20250929-v1:0';
 
   constructor(scope: Construct, id: string, props: BedrockAgentProps) {
     super(scope, id);
@@ -80,9 +80,11 @@ export class BedrockAgentConstruct extends Construct {
     });
 
     agentRole.addToPolicy(new iam.PolicyStatement({
-      actions: ['bedrock:InvokeModel'],
+      actions: ['bedrock:InvokeModel', 'bedrock:InvokeModelWithResponseStream'],
       resources: [
-        `arn:aws:bedrock:${props.region}::foundation-model/${BedrockAgentConstruct.MODEL_ID}`,
+        // Cross-region inference profile (us.*) routes to multiple regions — wildcard region required
+        `arn:aws:bedrock:*::foundation-model/anthropic.claude-sonnet-4-5-20250929-v1:0`,
+        `arn:aws:bedrock:${props.region}:${props.accountId}:inference-profile/${BedrockAgentConstruct.MODEL_ID}`,
       ],
     }));
 
@@ -203,7 +205,7 @@ Keep responses concise, professional, and actionable.`;
     this.agentAlias = new bedrock.CfnAgentAlias(this, 'AgentAlias', {
       agentId: this.agent.attrAgentId,
       agentAliasName: 'live',
-      description: 'Production alias — seahaven-assistant',
+      description: 'Production alias — seahaven-assistant v2 (Claude Sonnet 4.5)',
     });
   }
 }