
Mark contributed to the ag-ui-protocol/ag-ui repository by building cross-platform SDKs and middleware that enable real-time AI agent integration, streaming, and session management across Android, iOS, and web environments. He engineered robust backend systems using Kotlin Multiplatform, Python, and FastAPI, focusing on event-driven architecture and seamless API integration. Mark’s work included developing middleware for Google ADK agents, implementing predictive state updates, and enhancing streaming reliability for human-in-the-loop workflows. He maintained rigorous test coverage, automated CI/CD pipelines, and ensured compatibility across platforms. His engineering approach emphasized maintainability, thorough documentation, and reliable deployment, resulting in stable, production-ready agent orchestration tools.
February 2026 delivered substantial improvements to streaming, HITL workflows, and CI stability, focusing on business value, reliability, and developer experience. Key features were released with Gemini 3+ streaming support, enhanced event streaming, and automated device pairing flows, while reliability improvements reduced duplication and ensured consistent tool results across agent types. The work also strengthened persistence paths for SSE and HITL-related events and modernized CI/SDK setup for smoother, repeatable builds. What changed at a glance: - Streaming function call arguments and dedup for Gemini 3+ (ADK middleware): added incremental streaming of function call arguments with robust dedup and version-gated behavior to support real-time, human-in-the-loop workflows. - Automatic clawg-ui pairing flow in the Chat sample app: introduced an automatic device pairing flow to simplify connections to clawg-ui endpoints. - Thought separation in streaming history: emit ReasoningMessage parts before AssistantMessage to clearly separate internal reasoning from visible output during live streaming. - SSE streaming persistence fixes: ensured proper persistence of LongRunningFunctionTool events during SSE streaming, with targeted tests for validation. - HITL resumption, invocation_id handling, and function_response persistence: hardened end-to-end HITL flow, reduced duplicate function_response events, and added integration tests to verify reliable resumption and state management. - CI/SDK maintenance: switched to macOS runners for Kotlin/SDK publishing and bumped to a newer Kotlin SDK version to improve cross-platform reliability and compatibility. Impact: These changes improve real-time feedback latency, reduce operational risk from duplicate tool calls, provide clearer streaming narratives for end users, and stabilize the HITL and LRO pathways. The updates also reduce CI friction and improve build reproducibility for downstream teams. Technologies/skills demonstrated: ADK middleware, Gemini 3+ streaming, SSE streaming, HITL tooling and persistence, Task/Tool call lifecycle management, Kotlin-based sample apps (Chat), macOS CI environments, and Kotlin SDK version management.
February 2026 delivered substantial improvements to streaming, HITL workflows, and CI stability, focusing on business value, reliability, and developer experience. Key features were released with Gemini 3+ streaming support, enhanced event streaming, and automated device pairing flows, while reliability improvements reduced duplication and ensured consistent tool results across agent types. The work also strengthened persistence paths for SSE and HITL-related events and modernized CI/SDK setup for smoother, repeatable builds. What changed at a glance: - Streaming function call arguments and dedup for Gemini 3+ (ADK middleware): added incremental streaming of function call arguments with robust dedup and version-gated behavior to support real-time, human-in-the-loop workflows. - Automatic clawg-ui pairing flow in the Chat sample app: introduced an automatic device pairing flow to simplify connections to clawg-ui endpoints. - Thought separation in streaming history: emit ReasoningMessage parts before AssistantMessage to clearly separate internal reasoning from visible output during live streaming. - SSE streaming persistence fixes: ensured proper persistence of LongRunningFunctionTool events during SSE streaming, with targeted tests for validation. - HITL resumption, invocation_id handling, and function_response persistence: hardened end-to-end HITL flow, reduced duplicate function_response events, and added integration tests to verify reliable resumption and state management. - CI/SDK maintenance: switched to macOS runners for Kotlin/SDK publishing and bumped to a newer Kotlin SDK version to improve cross-platform reliability and compatibility. Impact: These changes improve real-time feedback latency, reduce operational risk from duplicate tool calls, provide clearer streaming narratives for end users, and stabilize the HITL and LRO pathways. The updates also reduce CI friction and improve build reproducibility for downstream teams. Technologies/skills demonstrated: ADK middleware, Gemini 3+ streaming, SSE streaming, HITL tooling and persistence, Task/Tool call lifecycle management, Kotlin-based sample apps (Chat), macOS CI environments, and Kotlin SDK version management.
In 2026-01, the AG-UI and ADK ecosystem delivered significant enhancements across multimodal messaging, context/session propagation, API tooling, and release processes, driving stronger business value and developer efficiency. The work emphasizes reliability, richer user interactions, and streamlined deployment.
In 2026-01, the AG-UI and ADK ecosystem delivered significant enhancements across multimodal messaging, context/session propagation, API tooling, and release processes, driving stronger business value and developer efficiency. The work emphasizes reliability, richer user interactions, and streamlined deployment.
2025-12 monthly summary for ag-ui (ag-ui-protocol/ag-ui). This period delivered a set of high-impact ADK middleware improvements focused on reliability, real-time collaboration, and multi-tenant integration, driving business value through more accurate responses, faster feature delivery, and easier customer onboarding across the Kotlin and Python SDKs. The work elevated streaming stability, event handling, and session/state management, enabling safer replay and persistent state.
2025-12 monthly summary for ag-ui (ag-ui-protocol/ag-ui). This period delivered a set of high-impact ADK middleware improvements focused on reliability, real-time collaboration, and multi-tenant integration, driving business value through more accurate responses, faster feature delivery, and easier customer onboarding across the Kotlin and Python SDKs. The work elevated streaming stability, event handling, and session/state management, enabling safer replay and persistent state.
November 2025 monthly summary for ag-ui-protocol/ag-ui: Delivered a multi-faceted set of improvements across build, publishing, and release processes, with a strong emphasis on business value through faster, more reliable deployments and broader platform support. Technical work spanned dependency management, Kotlin Multiplatform publishing, and documentation consolidation, culminating in stabilized artifacts and a cleaner project structure.
November 2025 monthly summary for ag-ui-protocol/ag-ui: Delivered a multi-faceted set of improvements across build, publishing, and release processes, with a strong emphasis on business value through faster, more reliable deployments and broader platform support. Technical work spanned dependency management, Kotlin Multiplatform publishing, and documentation consolidation, culminating in stabilized artifacts and a cleaner project structure.
Month 2025-10 highlights: Delivered a cross-platform Kotlin Multiplatform SDK for the AG-UI protocol enabling real-time streaming, state management, and extensible tool integration across Android, iOS, and JVM. Implemented robust ADK middleware enhancements for tool output serialization, explicit streaming handling, deduplication of final payloads, and proper runner cleanup, with a new middleware version bump. Rolled out Chat app enhancements with Markdown rendering and a background tool capability, plus broader event handling coverage. Improved haiku carousel polling robustness and enhanced Python compatibility/type-safety for event translation. Strengthened CI/test coverage with Kotlin JVM tests in GitHub Actions and stable end-to-end tests; 277 tests passed across modules. Fixed critical iOS crash (Info.plist requirement), resolved Android instrumented test timing issues, and addressed several test reliability issues to reduce flakiness. These efforts accelerate cross-platform agent deployment, improve streaming reliability, and enhance developer velocity and product quality.
Month 2025-10 highlights: Delivered a cross-platform Kotlin Multiplatform SDK for the AG-UI protocol enabling real-time streaming, state management, and extensible tool integration across Android, iOS, and JVM. Implemented robust ADK middleware enhancements for tool output serialization, explicit streaming handling, deduplication of final payloads, and proper runner cleanup, with a new middleware version bump. Rolled out Chat app enhancements with Markdown rendering and a background tool capability, plus broader event handling coverage. Improved haiku carousel polling robustness and enhanced Python compatibility/type-safety for event translation. Strengthened CI/test coverage with Kotlin JVM tests in GitHub Actions and stable end-to-end tests; 277 tests passed across modules. Fixed critical iOS crash (Info.plist requirement), resolved Android instrumented test timing issues, and addressed several test reliability issues to reduce flakiness. These efforts accelerate cross-platform agent deployment, improve streaming reliability, and enhance developer velocity and product quality.
September 2025 delivered the ADK Middleware Integration for the AG-UI Protocol, establishing a robust bridge between Google ADK agents and the AG-UI ecosystem. The work includes core bridging classes, event translation, and session management, all exposed via FastAPI with SSE streaming. A comprehensive test suite accompanied major refactors that improved logging, organization, and maintainability. Key capabilities include automatic session memory, a centralized session lifecycle manager, and support for in-memory or pluggable services, enabling reliable multi-agent orchestration and easier on-boarding. CI automation and refreshed documentation further strengthened release readiness and business value.
September 2025 delivered the ADK Middleware Integration for the AG-UI Protocol, establishing a robust bridge between Google ADK agents and the AG-UI ecosystem. The work includes core bridging classes, event translation, and session management, all exposed via FastAPI with SSE streaming. A comprehensive test suite accompanied major refactors that improved logging, organization, and maintainability. Key capabilities include automatic session memory, a centralized session lifecycle manager, and support for in-memory or pluggable services, enabling reliable multi-agent orchestration and easier on-boarding. CI automation and refreshed documentation further strengthened release readiness and business value.
Month: 2025-07 — Focused on improving project visibility and readiness for Google ADK integration within ag-ui. The primary deliverable was updating the integration status in the README to reflect that work has officially begun, moving from 'Open to Contributions' to 'In Progress'. This clarifies ownership, signals momentum to contributors, and supports sprint planning for the integration work. No major bugs were fixed this month. Overall, the update reduces ambiguity, enables better coordination with cross-functional teams, and establishes a foundation for upcoming integration tasks. Technologies/skills demonstrated include documentation discipline, Markdown/README conventions, and version-control practices.
Month: 2025-07 — Focused on improving project visibility and readiness for Google ADK integration within ag-ui. The primary deliverable was updating the integration status in the README to reflect that work has officially begun, moving from 'Open to Contributions' to 'In Progress'. This clarifies ownership, signals momentum to contributors, and supports sprint planning for the integration work. No major bugs were fixed this month. Overall, the update reduces ambiguity, enables better coordination with cross-functional teams, and establishes a foundation for upcoming integration tasks. Technologies/skills demonstrated include documentation discipline, Markdown/README conventions, and version-control practices.

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