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Evan Mattson

Developer

Evan Mattson

35585003+moonbox3@users.noreply.github.com

167 commits~7 files/commit

Performance

YoY:+137%
2026Previous year

Insights

Key patterns and highlights from this developer's activity.

Peak MonthApr'25832 performance
Growth Trend↓95%vs prior period
Avg Files/Commit7files per commit
Active Days99of 455 days
Top Reposemantic-kernel167 commits

Effort Over Time

Breakdown of growth, maintenance, and fixes effort over time.

Bug Behavior

Beta

Bugs introduced vs. fixed over time.

Investment Quality

Beta

Reclassifies engineering effort based on bug attribution. Commits that introduced bugs are retrospectively counted as poor investments.

30%Productive TimeGrowth 71% + Fixes 29%
31%Maintenance Time
39%Wasted Time
How it works

Methodology

Investment Quality reclassifies engineering effort based on bug attribution data. Commits identified as buggy origins (those that introduced bugs later fixed by someone) have their grow and maintenance time moved into the Wasted Time category. Their waste (fix commits) remains counted as productive. All other commits retain their standard classification: grow is productive, maintenance is maintenance, and waste (fixes) is productive.

Relationship to Growth / Maintenance / Fixes

The standard model classifies commits as Growth, Maintenance, or Fixes. Investment Quality adds a quality lens: a commit that introduced a bug is retrospectively counted as a poor investment — the engineering time spent on it was wasted because it ultimately required additional fix work. Fix commits (Fixes in the standard model) are reframed as productive, because fixing bugs is valuable work.

Proposed API Endpoint

Currently computed client-side from commit and bug attribution data. Ideal server-side endpoint:

POST /v1/organizations/{orgId}/investment-quality
Content-Type: application/json

Request:
{
  "startTime": "2025-01-01T00:00:00Z",
  "endTime": "2025-12-31T23:59:59Z",
  "bucketSize": "BUCKET_SIZE_MONTH",
  "groupBy": ["repository_id" | "deliverer_email"]
}

Response:
{
  "productivePct": 74,
  "maintenancePct": 18,
  "wastedPct": 8,
  "buckets": [
    {
      "bucketStart": "2025-01-01T00:00:00Z",
      "productive": 4.2,
      "maintenance": 1.8,
      "wasted": 0.6
    }
  ]
}

Recent Activity

Latest analyzed commits from this developer.

HashMessageDateFilesEffort
9d120bcThis commit performs a **maintenance update** by **bumping the version** of the **Python `semantic_kernel` package** from `1.41.0` to `1.41.1`. This change primarily affects the **Python SDK's metadata** within `python/semantic_kernel/__init__.py`, signaling a new release. The update ensures that users installing the package will receive the latest stable version, reflecting recent improvements or fixes.Mar 251maint
e0bd528This commit implements a **security enhancement** for the **Python Dapr runtime integration** by changing the default behavior of the `allowed_module_prefixes` parameter from `None` to `("semantic_kernel.",)`. This **configuration change** ensures that only step classes within the `semantic_kernel` module prefix are loaded by default, enforcing a **secure-by-default** posture for the experimental Dapr runtime. The core logic for this is updated in `get_step_class_from_qualified_name` within `step_utils.py`, with corresponding parameter updates across `dapr_runtime` classes like `StepActor` and `DaprKernelProcessContext`. Developers using custom step classes outside this prefix will now need to explicitly configure the `allowed_module_prefixes` parameter, impacting how external modules are integrated into **Semantic Kernel** processes. This **refactoring** of default parameters improves the overall security stance of the system.Mar 249maint
5069b41This commit **refactors** the **automated PR review workflow** defined in `.github/workflows/devflow-pr-review.yml` to **simplify PR parsing**. The workflow now directly accepts a PR number as input, eliminating the previous requirement for a full URL. This **maintenance improvement** streamlines the input handling for the review process, making it more robust and easier to integrate.Mar 241maint
8b32b3bThis commit introduces a **new automated pull request review workflow** to streamline the project's **development process**. It adds a new **GitHub Actions workflow**, `devflow-pr-review.yml`, which is designed to be triggered by pull request events or can be dispatched manually. This **new capability** enhances the project's CI/CD and code quality efforts by automating aspects of the PR review cycle. The workflow aims to improve efficiency and consistency in code contributions.Mar 201grow
bb421f6This commit implements a **maintenance adjustment** to the project's **CI/CD pipeline** to address **resource capacity constraints**. It **reduces the macOS runner coverage** for **Python unit tests** by **excluding Python versions 3.10 and 3.11** from the test matrix. Specifically, the `.github/workflows/python-unit-tests.yml` workflow is updated to no longer run tests for these Python versions on macOS. This change aims to optimize CI/CD resource usage, leading to potentially faster pipeline execution, but with a temporary reduction in test coverage for the specified Python environments.Mar 191maint
3f6d727This commit **fixes failing Python image integration tests** and a related sample by updating problematic image URLs. Previously, tests and the `simple_chatbot_with_image.py` sample were blocked by bot policies when trying to access Wikimedia images. The change replaces these unreliable links with stable GitHub raw content or asset URLs, ensuring the **reliability of image input functionalities**. This **maintenance** task restores the integrity of the **Python test suite** and makes the image chatbot sample functional again.Mar 183maint
b3cf64aThis commit performs a **maintenance** update by **bumping the version number** of the **Python `semantic_kernel` package** from `1.40.0` to `1.41.0`. Specifically, the `__init__.py` file within the `python/semantic_kernel` module is updated to reflect this new version. This change prepares the Python library for an upcoming release, indicating new features, bug fixes, or improvements are available in version `1.41.0`. It directly impacts all users and projects that consume the `semantic_kernel` Python package, signaling a new official release.Mar 131maint
1b8b08bThis commit performs a **maintenance and cleanup task** by **removing an obsolete GitHub Actions workflow** from the repository's automation configuration. It specifically targets the **CI/CD infrastructure**, eliminating a workflow that is no longer in use. This action **reduces repository clutter** and **improves overall project hygiene** without impacting any functional features or the build process.Feb 132–
838b951This commit performs a **maintenance update** by **bumping the version number** of the **Python `semantic_kernel` package**. Specifically, it updates the version string in `python/semantic_kernel/__init__.py` from `1.39.2` to `1.39.3`. This change is in preparation for a new release, ensuring that the package correctly reflects its current version. The update primarily affects package metadata and does not introduce functional changes to the library's core capabilities.Feb 21maint
b6f95e2This commit introduces **robust validation and control** for dynamically loading step classes within the **Dapr Runtime** in Python. It ensures that only valid `KernelProcessStep` subclasses can be instantiated, significantly improving **type safety** and providing clearer error messages during misconfiguration. A new utility function, `get_step_class_from_qualified_name`, centralizes this logic and allows users to restrict module loading via an `allowed_module_prefixes` parameter, enhancing **security and reliability**. This change involves **refactoring** existing class loading mechanisms in `step_actor.py` and `dapr_step_info.py`, and updating `dapr_process_info.py` to support the new configuration.Feb 26maint
e696dc7This commit introduces a **new security capability** to the **`SessionsPythonTool`** in the Python SDK by adding **directory allowlisting** for **file upload and download operations**. Developers can now configure `allowed_upload_directories` and `allowed_download_directories` to specify explicit filesystem boundaries, providing **fine-grained control** over where the plugin can access or store files. This **enhancement** prevents unauthorized filesystem access when `SessionsPythonTool` is used with AI models, improving overall system security. The `upload_file` function now requires an allowlist (deny-by-default), while `download_file` supports an optional allowlist (permissive-by-default), with all paths undergoing canonicalization. This change affects the `sessions_python_plugin.py` module and includes updated samples and comprehensive unit tests.Jan 233maint
1e1fb14This commit performs a **maintenance** update by **bumping the version number** of the **Python SDK** to `1.39.2`. Specifically, it modifies the `__init__.py` file within the `semantic_kernel` package to reflect this new version. This change is crucial for **release preparation**, ensuring that the installed Python package accurately reports its current version. It provides clarity for users and systems regarding the specific iteration of the SDK being utilized.Jan 191maint
adb71bcThis commit **bumps the Python package version** of `semantic_kernel` to `v1.39.1`, preparing the **Python SDK** for a new release. As part of this **maintenance** update, the `__init__.py` file is modified to reflect the new version number. Additionally, a **test infrastructure improvement** is included, marking the `test_summarize_conversation` unit test within the `ConversationSummaryPlugin` as asynchronous using `@pytest.mark.asyncio` to ensure correct execution. This ensures the package is accurately versioned and its asynchronous tests are properly configured for the release.Jan 152maint
9cb9abaThis commit **updates the version number** for the **Python `semantic_kernel` package** from `1.38.0` to `1.39.0`. This is a **maintenance** task, specifically a **version bump** within the `python/semantic_kernel/__init__.py` file, signifying the preparation for a new official release. This change ensures that users installing the package will now receive the latest `1.39.0` version, reflecting recent developments and improvements within the library.Nov 261maint
849cff0This commit performs a **version bump** for the **Python `semantic_kernel` package**, updating its internal version string from `1.37.1` to `1.38.0` within the `python/semantic_kernel/__init__.py` file. This **maintenance** change is a preparatory step for an upcoming release, ensuring the package correctly identifies its new version. It primarily affects the **Python SDK**, signaling to users and systems that a new version of the library is available.Nov 111maint
2651307This commit performs a **maintenance update** by **bumping the version** of the **Python `semantic_kernel` package**. Specifically, it updates the package version from `1.37.0` to `1.37.1` within the `python/semantic_kernel/__init__.py` file. This change is part of **release preparation**, ensuring the package metadata accurately reflects the current release state. It primarily affects the **versioning and release cycle** of the Python SDK, indicating a minor update or patch.Oct 301maint
05d659dThis commit delivers a **bug fix** for the **Python template engine**, addressing an issue where non-string `KernelArguments` were inadvertently converted to strings when passed to functions within prompt templates. The **`render_code`** method in `code_block.py` has been modified, and a new `get_value` method added to `var_block.py`, to ensure that the original type of `VarBlock` and `NamedArgBlock` arguments is **preserved**. This enhancement prevents data loss and incorrect type handling, significantly improving the reliability and flexibility of **prompt template function calls** within the **Semantic Kernel's Python implementation**. New unit tests have been added to validate this correct type preservation.Oct 303waste
f5fb44eThis commit performs a **maintenance update** by **bumping the Weaviate Docker image version** used within the **Python integration tests workflow**. Specifically, the `weaviate/weaviate` image is upgraded from `1.26.6` to `1.33.3` in the `.github/workflows/python-integration-tests.yml` configuration. This ensures that the **Python integration tests** for the **Weaviate vector database integration** are executed against a more recent and potentially more stable or feature-rich version of the Weaviate server, improving test reliability and compatibility.Oct 301maint
28ea2f4This commit **fixes broken links** within the `README.md` file for the **AzureAIAgent** in the **Python samples**. Specifically, it updates the numerical prefixes of example file paths in the **getting started with agents documentation**. This **documentation fix** ensures users can correctly navigate to the relevant Azure AI Agent example files, significantly improving the onboarding experience for the **Python SDK**.Sep 171maint
cc71ebfThis commit performs a **maintenance** update by **bumping the version** of the **Python SDK** to `1.37.0`. Specifically, it updates the package version string within the `python/semantic_kernel/__init__.py` file. This change signifies a new official release of the Python package, making the updated version available to all users and reflecting the latest development state.Sep 151maint
9d120bcMar 25

This commit performs a **maintenance update** by **bumping the version** of the **Python `semantic_kernel` package** from `1.41.0` to `1.41.1`. This change primarily affects the **Python SDK's metadata** within `python/semantic_kernel/__init__.py`, signaling a new release. The update ensures that users installing the package will receive the latest stable version, reflecting recent improvements or fixes.

1 filesmaint
e0bd528Mar 24

This commit implements a **security enhancement** for the **Python Dapr runtime integration** by changing the default behavior of the `allowed_module_prefixes` parameter from `None` to `("semantic_kernel.",)`. This **configuration change** ensures that only step classes within the `semantic_kernel` module prefix are loaded by default, enforcing a **secure-by-default** posture for the experimental Dapr runtime. The core logic for this is updated in `get_step_class_from_qualified_name` within `step_utils.py`, with corresponding parameter updates across `dapr_runtime` classes like `StepActor` and `DaprKernelProcessContext`. Developers using custom step classes outside this prefix will now need to explicitly configure the `allowed_module_prefixes` parameter, impacting how external modules are integrated into **Semantic Kernel** processes. This **refactoring** of default parameters improves the overall security stance of the system.

9 filesmaint
5069b41Mar 24

This commit **refactors** the **automated PR review workflow** defined in `.github/workflows/devflow-pr-review.yml` to **simplify PR parsing**. The workflow now directly accepts a PR number as input, eliminating the previous requirement for a full URL. This **maintenance improvement** streamlines the input handling for the review process, making it more robust and easier to integrate.

1 filesmaint
8b32b3bMar 20

This commit introduces a **new automated pull request review workflow** to streamline the project's **development process**. It adds a new **GitHub Actions workflow**, `devflow-pr-review.yml`, which is designed to be triggered by pull request events or can be dispatched manually. This **new capability** enhances the project's CI/CD and code quality efforts by automating aspects of the PR review cycle. The workflow aims to improve efficiency and consistency in code contributions.

1 filesgrow
bb421f6Mar 19

This commit implements a **maintenance adjustment** to the project's **CI/CD pipeline** to address **resource capacity constraints**. It **reduces the macOS runner coverage** for **Python unit tests** by **excluding Python versions 3.10 and 3.11** from the test matrix. Specifically, the `.github/workflows/python-unit-tests.yml` workflow is updated to no longer run tests for these Python versions on macOS. This change aims to optimize CI/CD resource usage, leading to potentially faster pipeline execution, but with a temporary reduction in test coverage for the specified Python environments.

1 filesmaint
3f6d727Mar 18

This commit **fixes failing Python image integration tests** and a related sample by updating problematic image URLs. Previously, tests and the `simple_chatbot_with_image.py` sample were blocked by bot policies when trying to access Wikimedia images. The change replaces these unreliable links with stable GitHub raw content or asset URLs, ensuring the **reliability of image input functionalities**. This **maintenance** task restores the integrity of the **Python test suite** and makes the image chatbot sample functional again.

3 filesmaint
b3cf64aMar 13

This commit performs a **maintenance** update by **bumping the version number** of the **Python `semantic_kernel` package** from `1.40.0` to `1.41.0`. Specifically, the `__init__.py` file within the `python/semantic_kernel` module is updated to reflect this new version. This change prepares the Python library for an upcoming release, indicating new features, bug fixes, or improvements are available in version `1.41.0`. It directly impacts all users and projects that consume the `semantic_kernel` Python package, signaling a new official release.

1 filesmaint
1b8b08bFeb 13

This commit performs a **maintenance and cleanup task** by **removing an obsolete GitHub Actions workflow** from the repository's automation configuration. It specifically targets the **CI/CD infrastructure**, eliminating a workflow that is no longer in use. This action **reduces repository clutter** and **improves overall project hygiene** without impacting any functional features or the build process.

2 files–
838b951Feb 2

This commit performs a **maintenance update** by **bumping the version number** of the **Python `semantic_kernel` package**. Specifically, it updates the version string in `python/semantic_kernel/__init__.py` from `1.39.2` to `1.39.3`. This change is in preparation for a new release, ensuring that the package correctly reflects its current version. The update primarily affects package metadata and does not introduce functional changes to the library's core capabilities.

1 filesmaint
b6f95e2Feb 2

This commit introduces **robust validation and control** for dynamically loading step classes within the **Dapr Runtime** in Python. It ensures that only valid `KernelProcessStep` subclasses can be instantiated, significantly improving **type safety** and providing clearer error messages during misconfiguration. A new utility function, `get_step_class_from_qualified_name`, centralizes this logic and allows users to restrict module loading via an `allowed_module_prefixes` parameter, enhancing **security and reliability**. This change involves **refactoring** existing class loading mechanisms in `step_actor.py` and `dapr_step_info.py`, and updating `dapr_process_info.py` to support the new configuration.

6 filesmaint
e696dc7Jan 23

This commit introduces a **new security capability** to the **`SessionsPythonTool`** in the Python SDK by adding **directory allowlisting** for **file upload and download operations**. Developers can now configure `allowed_upload_directories` and `allowed_download_directories` to specify explicit filesystem boundaries, providing **fine-grained control** over where the plugin can access or store files. This **enhancement** prevents unauthorized filesystem access when `SessionsPythonTool` is used with AI models, improving overall system security. The `upload_file` function now requires an allowlist (deny-by-default), while `download_file` supports an optional allowlist (permissive-by-default), with all paths undergoing canonicalization. This change affects the `sessions_python_plugin.py` module and includes updated samples and comprehensive unit tests.

3 filesmaint
1e1fb14Jan 19

This commit performs a **maintenance** update by **bumping the version number** of the **Python SDK** to `1.39.2`. Specifically, it modifies the `__init__.py` file within the `semantic_kernel` package to reflect this new version. This change is crucial for **release preparation**, ensuring that the installed Python package accurately reports its current version. It provides clarity for users and systems regarding the specific iteration of the SDK being utilized.

1 filesmaint
adb71bcJan 15

This commit **bumps the Python package version** of `semantic_kernel` to `v1.39.1`, preparing the **Python SDK** for a new release. As part of this **maintenance** update, the `__init__.py` file is modified to reflect the new version number. Additionally, a **test infrastructure improvement** is included, marking the `test_summarize_conversation` unit test within the `ConversationSummaryPlugin` as asynchronous using `@pytest.mark.asyncio` to ensure correct execution. This ensures the package is accurately versioned and its asynchronous tests are properly configured for the release.

2 filesmaint
9cb9abaNov 26

This commit **updates the version number** for the **Python `semantic_kernel` package** from `1.38.0` to `1.39.0`. This is a **maintenance** task, specifically a **version bump** within the `python/semantic_kernel/__init__.py` file, signifying the preparation for a new official release. This change ensures that users installing the package will now receive the latest `1.39.0` version, reflecting recent developments and improvements within the library.

1 filesmaint
849cff0Nov 11

This commit performs a **version bump** for the **Python `semantic_kernel` package**, updating its internal version string from `1.37.1` to `1.38.0` within the `python/semantic_kernel/__init__.py` file. This **maintenance** change is a preparatory step for an upcoming release, ensuring the package correctly identifies its new version. It primarily affects the **Python SDK**, signaling to users and systems that a new version of the library is available.

1 filesmaint
2651307Oct 30

This commit performs a **maintenance update** by **bumping the version** of the **Python `semantic_kernel` package**. Specifically, it updates the package version from `1.37.0` to `1.37.1` within the `python/semantic_kernel/__init__.py` file. This change is part of **release preparation**, ensuring the package metadata accurately reflects the current release state. It primarily affects the **versioning and release cycle** of the Python SDK, indicating a minor update or patch.

1 filesmaint
05d659dOct 30

This commit delivers a **bug fix** for the **Python template engine**, addressing an issue where non-string `KernelArguments` were inadvertently converted to strings when passed to functions within prompt templates. The **`render_code`** method in `code_block.py` has been modified, and a new `get_value` method added to `var_block.py`, to ensure that the original type of `VarBlock` and `NamedArgBlock` arguments is **preserved**. This enhancement prevents data loss and incorrect type handling, significantly improving the reliability and flexibility of **prompt template function calls** within the **Semantic Kernel's Python implementation**. New unit tests have been added to validate this correct type preservation.

3 fileswaste
f5fb44eOct 30

This commit performs a **maintenance update** by **bumping the Weaviate Docker image version** used within the **Python integration tests workflow**. Specifically, the `weaviate/weaviate` image is upgraded from `1.26.6` to `1.33.3` in the `.github/workflows/python-integration-tests.yml` configuration. This ensures that the **Python integration tests** for the **Weaviate vector database integration** are executed against a more recent and potentially more stable or feature-rich version of the Weaviate server, improving test reliability and compatibility.

1 filesmaint
28ea2f4Sep 17

This commit **fixes broken links** within the `README.md` file for the **AzureAIAgent** in the **Python samples**. Specifically, it updates the numerical prefixes of example file paths in the **getting started with agents documentation**. This **documentation fix** ensures users can correctly navigate to the relevant Azure AI Agent example files, significantly improving the onboarding experience for the **Python SDK**.

1 filesmaint
cc71ebfSep 15

This commit performs a **maintenance** update by **bumping the version** of the **Python SDK** to `1.37.0`. Specifically, it updates the package version string within the `python/semantic_kernel/__init__.py` file. This change signifies a new official release of the Python package, making the updated version available to all users and reflecting the latest development state.

1 filesmaint

Work Patterns

Beta

Commit activity distribution by hour and day of week. Shows when this developer is most active.

Collaboration

Beta

Developers who frequently work on the same files and symbols. Higher score means stronger code collaboration.

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