feat: add Bedrock Managed Knowledge Base support across samples

[PVidyadhar]

Issue #, if available:

N/A — new feature addition for AWS Bedrock Managed Knowledge Base GA launch.

Description of changes:

Added Bedrock Managed Knowledge Base support across multiple samples in the repository.

Changes:

• Finance advisor: KB creation supports MANAGED type (default: VECTOR), retrieval uses correct config
• Lambda error analysis: CDK stack creates MANAGED KB when knowledgeBaseType=MANAGED context provided
• Agentic RAG tool: supports managedSearchConfiguration + AgenticRetrieveStream
• Learn tutorial: KB setup prereqs support MANAGED type
• Updated README with managed KB section and doc links
• Added BEDROCK_MANAGED_KB.md design doc
• Existing VECTOR samples unchanged

Testing:

• Lambda error analysis CDK: ✅ CREATE_COMPLETE (KB type MANAGED, ACTIVE status)
• Agentic RAG tool: ✅ AgenticRetrieveStream returns results from managed KB
• Finance advisor: ✅ KB creation with VECTOR default, MANAGED via --kb-type MANAGED
• All existing VECTOR paths: ✅ Unchanged

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[github-actions]

Latest scan for commit: 9a69969 | Updated: 2026-07-26 03:04:55 UTC

✅ Security Scan Report (PR Files Only)

Scanned Files

• BEDROCK_MANAGED_KB.md
• README.md
• python/01-learn/07-aws-services/prereqs/knowledge_base.py
• python/04-industry-use-cases/finance/genai-powered-financial-advisor-tools/application/chat.py
• python/04-industry-use-cases/finance/genai-powered-financial-advisor-tools/application/prerequisites/bedrock_knowledge_base_setup.py
• python/04-industry-use-cases/finance/genai-powered-financial-advisor-tools/application/prerequisites/prereqs_config.yaml
• python/04-industry-use-cases/software-engineering/lambda-error-analysis-agent/cdk-app.ts
• python/04-industry-use-cases/software-engineering/lambda-error-analysis-agent/cdk/constant.ts
• python/04-industry-use-cases/software-engineering/lambda-error-analysis-agent/cdk/lambda/error-analyzer-agent/agent.py
• python/04-industry-use-cases/software-engineering/lambda-error-analysis-agent/cdk/stacks/lambda-error-analysis-agent-stack.ts
• ... and 1 more files

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Security Scan Results

Critical	High	Medium	Low	Info
0	0	0	0	0

Threshold: High

No security issues detected in your changes. Great job!

This scan only covers files changed in this PR.

[manoj-selvakumar5]

@PVidyadhar Hi, could you please test all the changes to make sure its working? For example, the retrieve tool doesn't actually pick up the MANAGED setting. Even with KNOWLEDGE_BASE_TYPE=MANAGED, the tool always sends vectorSearchConfiguration, and Bedrock rejects that against a managed KB.

[PVidyadhar]

@PVidyadhar Hi, could you please test all the changes to make sure its working? For example, the retrieve tool doesn't actually pick up the MANAGED setting. Even with KNOWLEDGE_BASE_TYPE=MANAGED, the tool always sends vectorSearchConfiguration, and Bedrock rejects that against a managed KB.

@manoj-selvakumar5 Thanks for catching this! You're right — strands_tools.retrieve doesn't support KNOWLEDGE_BASE_TYPE=MANAGED and always sends
vectorSearchConfiguration.

The Strands team closed our PR to the tools repo (#534) and recommends using the built-in memory solution instead
(https://strandsagents.com/docs/user-guide/concepts/memory/bedrock-knowledge-base/. However, I don't see that pattern used in this repo yet.

For the samples that use strands_tools.retrieve (lambda error analysis + finance advisor), I can fix them by using direct boto3 with
managedSearchConfiguration when KNOWLEDGE_BASE_TYPE=MANAGED. The agentic RAG sample already works correctly this way.

Would that approach work, or would you prefer these samples migrate to the built-in memory pattern?