Gunnar Grosch
@gunnargrosch.com
Principal Developer Advocate AWS | Engaged to the wonderful @arcticf0xx.com | Opinions are my own | gunnargrosch.com
AgentCore Gateway auto-converts REST APIs to MCP servers. Runtime deploys containerized agents. Code Interpreter runs LLM-generated code securely.
All experimental but shows where .NET AI is heading!
All experimental but shows where .NET AI is heading!
December 19, 2025 at 9:58 AM
AgentCore Gateway auto-converts REST APIs to MCP servers. Runtime deploys containerized agents. Code Interpreter runs LLM-generated code securely.
All experimental but shows where .NET AI is heading!
All experimental but shows where .NET AI is heading!
The stack: Microsoft.Extensions.AI abstraction, Semantic Kernel (established), Agent Framework (simpler future), Amazon Bedrock (models), AWSSDK.Extensions.Bedrock.MEAI (integration)
Amazon Bedrock AgentCore steals the show with composable services!
Amazon Bedrock AgentCore steals the show with composable services!
December 19, 2025 at 9:58 AM
The stack: Microsoft.Extensions.AI abstraction, Semantic Kernel (established), Agent Framework (simpler future), Amazon Bedrock (models), AWSSDK.Extensions.Bedrock.MEAI (integration)
Amazon Bedrock AgentCore steals the show with composable services!
Amazon Bedrock AgentCore steals the show with composable services!
AWS re:Invent 2025 - Spec-driven development with Kiro (DEV314)
YouTube video by AWS Events
www.youtube.com
December 18, 2025 at 2:57 PM
Nikhil: "When building a car, start with a skateboard, move to a bike. Build interim steps so you always have something workable."
Same for spec-driven dev - iterate at every phase!
Same for spec-driven dev - iterate at every phase!
December 18, 2025 at 2:57 PM
Nikhil: "When building a car, start with a skateboard, move to a bike. Build interim steps so you always have something workable."
Same for spec-driven dev - iterate at every phase!
Same for spec-driven dev - iterate at every phase!
Live demo: Built complete job interview prep app with audio recording, speech-to-text, AI feedback. Key features: property-based testing (100+ randomized inputs), agent hooks (automated quality gates), agent steering (coding standards), MCP integration.
December 18, 2025 at 2:57 PM
Live demo: Built complete job interview prep app with audio recording, speech-to-text, AI feedback. Key features: property-based testing (100+ randomized inputs), agent hooks (automated quality gates), agent steering (coding standards), MCP integration.
AWS re:Invent 2025 - Modernize Legacy Applications with Agentic AI (DEV333)
YouTube video by AWS Events
www.youtube.com
December 17, 2025 at 10:45 AM
Matt's Kiro CLI demo: Production troubleshooting in minutes vs hours, combining AWS CLI, kubectl, code analysis with proper permissions. Key: Ground modernization in design specs to prevent semantic drift!
December 17, 2025 at 10:45 AM
Matt's Kiro CLI demo: Production troubleshooting in minutes vs hours, combining AWS CLI, kubectl, code analysis with proper permissions. Key: Ground modernization in design specs to prevent semantic drift!
Seven live demos: AWS Transform extracting business logic, .NET Framework to .NET 8 cross-platform, AWS Transform Custom CLI upgrading Java/Spring Boot, Kiro enforcing corporate standards with steering files/MCP/RAG, Strands Agents SDK multi-agent orchestration, mainframe COBOL to Java
December 17, 2025 at 10:45 AM
Seven live demos: AWS Transform extracting business logic, .NET Framework to .NET 8 cross-platform, AWS Transform Custom CLI upgrading Java/Spring Boot, Kiro enforcing corporate standards with steering files/MCP/RAG, Strands Agents SDK multi-agent orchestration, mainframe COBOL to Java
Anahit's advice: "Each failure is an opportunity to do things better, to make our systems even more resilient."
As Werner Vogels says: "Everything fails, all the time."
As Werner Vogels says: "Everything fails, all the time."
December 16, 2025 at 2:22 PM
Anahit's advice: "Each failure is an opportunity to do things better, to make our systems even more resilient."
As Werner Vogels says: "Everything fails, all the time."
As Werner Vogels says: "Everything fails, all the time."
Key lessons covered:
⚡ Configure timeouts explicitly (never trust defaults)
🔄 Use exponential backoff with jitter
📊 Handle partial batch failures
🔧 Configure Lambda event source mapping
🚦 Understand service limits & throttling
⚡ Configure timeouts explicitly (never trust defaults)
🔄 Use exponential backoff with jitter
📊 Handle partial batch failures
🔧 Configure Lambda event source mapping
🚦 Understand service limits & throttling
December 16, 2025 at 2:22 PM
Key lessons covered:
⚡ Configure timeouts explicitly (never trust defaults)
🔄 Use exponential backoff with jitter
📊 Handle partial batch failures
🔧 Configure Lambda event source mapping
🚦 Understand service limits & throttling
⚡ Configure timeouts explicitly (never trust defaults)
🔄 Use exponential backoff with jitter
📊 Handle partial batch failures
🔧 Configure Lambda event source mapping
🚦 Understand service limits & throttling
Real production battle scars: Data loss from unconfigured timeouts (JS SDK defaulted to infinite!), unhandled partial Kinesis batch failures, Lambda retrying bad records indefinitely for 24+ hours. One poison pill blocked entire shards, causing cascading failures!
December 16, 2025 at 2:22 PM
Real production battle scars: Data loss from unconfigured timeouts (JS SDK defaulted to infinite!), unhandled partial Kinesis batch failures, Lambda retrying bad records indefinitely for 24+ hours. One poison pill blocked entire shards, causing cascading failures!
Result: Production-ready GenAI apps in minutes, not days.
Hot-swap for dev speed, CloudFormation for prod safety. Agents handle implementation while developers focus on vision & architecture.
Hot-swap for dev speed, CloudFormation for prod safety. Agents handle implementation while developers focus on vision & architecture.
December 15, 2025 at 10:12 AM
Result: Production-ready GenAI apps in minutes, not days.
Hot-swap for dev speed, CloudFormation for prod safety. Agents handle implementation while developers focus on vision & architecture.
Hot-swap for dev speed, CloudFormation for prod safety. Agents handle implementation while developers focus on vision & architecture.
AWS MCP Server (preview): Consolidates AWS CLI integration, live documentation & SOPs for common tasks.
Meta prompting insight: Use agents to write better prompts for agents! Ask: "What would've been more clear in my original message?"
Meta prompting insight: Use agents to write better prompts for agents! Ask: "What would've been more clear in my original message?"
December 15, 2025 at 10:12 AM
AWS MCP Server (preview): Consolidates AWS CLI integration, live documentation & SOPs for common tasks.
Meta prompting insight: Use agents to write better prompts for agents! Ask: "What would've been more clear in my original message?"
Meta prompting insight: Use agents to write better prompts for agents! Ask: "What would've been more clear in my original message?"
Key techniques demonstrated:
🔧 MCP servers for up-to-date docs
📋 Steering files as guardrails
🎯 Breaking prompts into small steps
🏗️ Infrastructure as code with CDK
📜 Deterministic deployment scripts
🛡️ CI/CD pipelines as safety nets
🔧 MCP servers for up-to-date docs
📋 Steering files as guardrails
🎯 Breaking prompts into small steps
🏗️ Infrastructure as code with CDK
📜 Deterministic deployment scripts
🛡️ CI/CD pipelines as safety nets
December 15, 2025 at 10:12 AM
Key techniques demonstrated:
🔧 MCP servers for up-to-date docs
📋 Steering files as guardrails
🎯 Breaking prompts into small steps
🏗️ Infrastructure as code with CDK
📜 Deterministic deployment scripts
🛡️ CI/CD pipelines as safety nets
🔧 MCP servers for up-to-date docs
📋 Steering files as guardrails
🎯 Breaking prompts into small steps
🏗️ Infrastructure as code with CDK
📜 Deterministic deployment scripts
🛡️ CI/CD pipelines as safety nets
It's part 6 btw. I can't count.
December 14, 2025 at 12:49 PM
It's part 6 btw. I can't count.