DEV Community: Matthias Kluth

Announcing stryker-mcp-reporter v1.16.0: 100% Mutation Score & Native MCP for AI Coding Agents

Matthias Kluth — Mon, 10 Aug 2026 10:56:22 +0000

Standard code coverage measures execution, not test strength. AI coding assistants generate hundreds of lines of unit tests, but often fall into the "happy path bias".

With stryker-mcp-reporter v1.16.0, AI pair programmers (Antigravity, Cursor, Claude Desktop, Roo Code, Cline) can autonomously execute mutation tests, inspect survived mutants via Model Context Protocol (MCP), write exact edge-case tests, and achieve a verified 100% Mutation Score.

🌟 What's New in v1.16.0

Bug Fixes

deps: correct stryker peerDependencies and downgrade typescript to 5.6 (9d36f3b)
resolve architecture and security flaws in Event Bus (d5c030f)
security: resolve npm vulnerabilities, remove unused variables, and fix unawaited promise in mcp-server.adapter.ts (ecfb8c2)

Features

AST-based Incremental Mutant Cache (4e89804)
Coverage Gap Analysis (0853df4)
implement Event Bus system (0dbb2d9)
implement git blame attribution for surviving mutants (8a95bdb)
implement massive agentic network and pipeline optimization (4cc0459)
Mutant Flakiness Tracker (207025b)

📸 Real Runtime Proof

Below are unedited runtime screenshots captured directly from active test executions:

⚡ How to Connect to Your AI Tool

Add this single JSON block to your MCP config:

{
  "mcpServers": {
    "stryker-mutation-testing": {
      "command": "npx",
      "args": ["-y", "--silent", "stryker-mcp-reporter"]
    }
  }
}

(Windows users: Use "command": "cmd.exe" with "args": ["/c", "npx", "-y", "--silent", "stryker-mcp-reporter"]).

Check out the full open-source project on GitHub: https://github.com/kluth/stryker-mcp-reporter

Announcing stryker-mcp-reporter v1.15.0: 100% Mutation Score & Native MCP for AI Coding Agents

Matthias Kluth — Mon, 10 Aug 2026 05:30:04 +0000

Standard code coverage measures execution, not test strength. AI coding assistants generate hundreds of lines of unit tests, but often fall into the "happy path bias".

With stryker-mcp-reporter v1.15.0, AI pair programmers (Antigravity, Cursor, Claude Desktop, Roo Code, Cline) can autonomously execute mutation tests, inspect survived mutants via Model Context Protocol (MCP), write exact edge-case tests, and achieve a verified 100% Mutation Score.

🌟 What's New in v1.15.0

Features

implement Hybrid Auto-Remediation Profiling pipeline (4c8825e)

📸 Real Runtime Proof

Below are unedited runtime screenshots captured directly from active test executions:

⚡ How to Connect to Your AI Tool

Add this single JSON block to your MCP config:

{
  "mcpServers": {
    "stryker-mutation-testing": {
      "command": "npx",
      "args": ["-y", "--silent", "stryker-mcp-reporter"]
    }
  }
}

(Windows users: Use "command": "cmd.exe" with "args": ["/c", "npx", "-y", "--silent", "stryker-mcp-reporter"]).

Check out the full open-source project on GitHub: https://github.com/kluth/stryker-mcp-reporter

Announcing stryker-mcp-reporter v1.14.0: 100% Mutation Score & Native MCP for AI Coding Agents

Matthias Kluth — Mon, 10 Aug 2026 04:58:54 +0000

Standard code coverage measures execution, not test strength. AI coding assistants generate hundreds of lines of unit tests, but often fall into the "happy path bias".

With stryker-mcp-reporter v1.14.0, AI pair programmers (Antigravity, Cursor, Claude Desktop, Roo Code, Cline) can autonomously execute mutation tests, inspect survived mutants via Model Context Protocol (MCP), write exact edge-case tests, and achieve a verified 100% Mutation Score.

🌟 What's New in v1.14.0

Features

add hooks for ADR creation and evaluation (8b225dd)

📸 Real Runtime Proof

Below are unedited runtime screenshots captured directly from active test executions:

⚡ How to Connect to Your AI Tool

Add this single JSON block to your MCP config:

{
  "mcpServers": {
    "stryker-mutation-testing": {
      "command": "npx",
      "args": ["-y", "--silent", "stryker-mcp-reporter"]
    }
  }
}

(Windows users: Use "command": "cmd.exe" with "args": ["/c", "npx", "-y", "--silent", "stryker-mcp-reporter"]).

Check out the full open-source project on GitHub: https://github.com/kluth/stryker-mcp-reporter

Announcing stryker-mcp-reporter v1.13.0: 100% Mutation Score & Native MCP for AI Coding Agents

Matthias Kluth — Sun, 09 Aug 2026 19:50:47 +0000

Standard code coverage measures execution, not test strength. AI coding assistants generate hundreds of lines of unit tests, but often fall into the "happy path bias".

With stryker-mcp-reporter v1.13.0, AI pair programmers (Antigravity, Cursor, Claude Desktop, Roo Code, Cline) can autonomously execute mutation tests, inspect survived mutants via Model Context Protocol (MCP), write exact edge-case tests, and achieve a verified 100% Mutation Score.

🌟 What's New in v1.13.0

Features

enforce McCabe complexity and max-lines with ESLint hook (330a951)

📸 Real Runtime Proof

Below are unedited runtime screenshots captured directly from active test executions:

⚡ How to Connect to Your AI Tool

Add this single JSON block to your MCP config:

{
  "mcpServers": {
    "stryker-mutation-testing": {
      "command": "npx",
      "args": ["-y", "--silent", "stryker-mcp-reporter"]
    }
  }
}

(Windows users: Use "command": "cmd.exe" with "args": ["/c", "npx", "-y", "--silent", "stryker-mcp-reporter"]).

Check out the full open-source project on GitHub: https://github.com/kluth/stryker-mcp-reporter

Announcing stryker-mcp-reporter v1.12.0: 100% Mutation Score & Native MCP for AI Coding Agents

Matthias Kluth — Sun, 09 Aug 2026 18:05:12 +0000

Standard code coverage measures execution, not test strength. AI coding assistants generate hundreds of lines of unit tests, but often fall into the "happy path bias".

With stryker-mcp-reporter v1.12.0, AI pair programmers (Antigravity, Cursor, Claude Desktop, Roo Code, Cline) can autonomously execute mutation tests, inspect survived mutants via Model Context Protocol (MCP), write exact edge-case tests, and achieve a verified 100% Mutation Score.

🌟 What's New in v1.12.0

Bug Fixes

resolve CJS/ESM interop in e2e tests (3bd8b93)
resolve TS errors in database.adapter and missing types for better-sqlite3 (03cff58)
serve public webapp directory on MCP express server (73fe00c)
use correct stryker incremental flag in CI (7405fb1)

Features

integrate SQLite database for runs and history (530f5a7)
ui: add E2E data-testids and improve a11y across dashboard (a9a289b)

📸 Real Runtime Proof

Below are unedited runtime screenshots captured directly from active test executions:

⚡ How to Connect to Your AI Tool

Add this single JSON block to your MCP config:

{
  "mcpServers": {
    "stryker-mutation-testing": {
      "command": "npx",
      "args": ["-y", "--silent", "stryker-mcp-reporter"]
    }
  }
}

(Windows users: Use "command": "cmd.exe" with "args": ["/c", "npx", "-y", "--silent", "stryker-mcp-reporter"]).

Check out the full open-source project on GitHub: https://github.com/kluth/stryker-mcp-reporter

Announcing stryker-mcp-reporter v1.11.0: 100% Mutation Score & Native MCP for AI Coding Agents

Matthias Kluth — Sun, 09 Aug 2026 18:05:07 +0000

Standard code coverage measures execution, not test strength. AI coding assistants generate hundreds of lines of unit tests, but often fall into the "happy path bias".

With stryker-mcp-reporter v1.11.0, AI pair programmers (Antigravity, Cursor, Claude Desktop, Roo Code, Cline) can autonomously execute mutation tests, inspect survived mutants via Model Context Protocol (MCP), write exact edge-case tests, and achieve a verified 100% Mutation Score.

🌟 What's New in v1.11.0

Bug Fixes

bot: fix syntax error in bot code templates (89c2fb7)
bot: fix syntax error in bot string literals (8fffe4b)
build: fix PredictMutationImpactUseCase instantiation on main (825ba50)
db: optionally load sqlite-vss based on settings (154d0bd)
mcp: only start server in daemon mode to prevent eaddrinuse (e3b4e63)
test: update mcp-reporter test for daemon flag (d28a6d6)

Features

bot: add analyze-dependencies autogenerated (6c76d2c)
bot: add bot-feature-1786119322864 autogenerated (143d0cc)
bot: add calculate-code-smells autogenerated (b54c8a5)
bot: add compare-branches autogenerated (38660ab)
bot: add create-badge-svg autogenerated (a8df9d3)
bot: add detect-duplicate-code autogenerated (6eeae38)
bot: add export-pdf-report autogenerated (27ecf1d)
bot: add fetch-git-blame autogenerated (3caadb4)
bot: add generate-changelog autogenerated (f85e0be)
bot: add generate-csv-report autogenerated (cbfb0c2)
bot: add integrate-github-issues autogenerated (85ae8ee)
bot: add integrate-jira autogenerated (2ad63f7)
bot: add post-pr-comment autogenerated (ddca4ef)
bot: add send-slack-notification autogenerated (f913ab0)
bot: add send-teams-notification autogenerated (49e4af7)
bot: add track-test-flakiness autogenerated (b25ea3a)
bot: add trigger-webhook autogenerated (ba3c2b1)
bot: add upload-to-gcs autogenerated (0011af6)
bot: add upload-to-s3 autogenerated (9087abf)
bot: add validate-coverage-threshold autogenerated (002110b)
core: add export-json (1feb673)
core: add filter-by-branch (bd630a0)
core: add filter-by-status (0827ec6)
core: add search-explorer (9031faa)
core: add sort-explorer-files (8acb1d3)
history: implement search history logic (1556915)
mcp: add detect_equivalent_mutants tool (c478c01)
mcp: add generate_testing_cheat_sheet tool (f1490e5)
mcp: advanced git delta mutation execution (line ranges) (44a5c9d)
mcp: automated mutant context aggregation (expanded) (48098ac)

📸 Real Runtime Proof

Below are unedited runtime screenshots captured directly from active test executions:

⚡ How to Connect to Your AI Tool

Add this single JSON block to your MCP config:

{
  "mcpServers": {
    "stryker-mutation-testing": {
      "command": "npx",
      "args": ["-y", "--silent", "stryker-mcp-reporter"]
    }
  }
}

(Windows users: Use "command": "cmd.exe" with "args": ["/c", "npx", "-y", "--silent", "stryker-mcp-reporter"]).

Check out the full open-source project on GitHub: https://github.com/kluth/stryker-mcp-reporter

Announcing stryker-mcp-reporter v1.10.0: 100% Mutation Score & Native MCP for AI Coding Agents

Matthias Kluth — Sat, 08 Aug 2026 10:18:57 +0000

Standard code coverage measures execution, not test strength. AI coding assistants generate hundreds of lines of unit tests, but often fall into the "happy path bias".

With stryker-mcp-reporter v1.10.0, AI pair programmers (Antigravity, Cursor, Claude Desktop, Roo Code, Cline) can autonomously execute mutation tests, inspect survived mutants via Model Context Protocol (MCP), write exact edge-case tests, and achieve a verified 100% Mutation Score.

🌟 What's New in v1.10.0

Bug Fixes

stryker: allow bin folder in sandbox for bundle build (8bb9398)

Features

Add killed mutants and context tools (e4bae57)
migrate to zero-dependency standalone bundle (313eb21)

📸 Real Runtime Proof

Below are unedited runtime screenshots captured directly from active test executions:

⚡ How to Connect to Your AI Tool

Add this single JSON block to your MCP config:

{
  "mcpServers": {
    "stryker-mutation-testing": {
      "command": "npx",
      "args": ["-y", "--silent", "stryker-mcp-reporter"]
    }
  }
}

(Windows users: Use "command": "cmd.exe" with "args": ["/c", "npx", "-y", "--silent", "stryker-mcp-reporter"]).

Check out the full open-source project on GitHub: https://github.com/kluth/stryker-mcp-reporter

Announcing stryker-mcp-reporter v1.11.0: 100% Mutation Score & Native MCP for AI Coding Agents

Matthias Kluth — Sat, 08 Aug 2026 10:18:37 +0000

Standard code coverage measures execution, not test strength. AI coding assistants generate hundreds of lines of unit tests, but often fall into the "happy path bias".

🌟 What's New in v1.11.0

Bug Fixes

bot: fix syntax error in bot code templates (89c2fb7)
bot: fix syntax error in bot string literals (8fffe4b)
build: fix PredictMutationImpactUseCase instantiation on main (825ba50)
db: optionally load sqlite-vss based on settings (154d0bd)
mcp: only start server in daemon mode to prevent eaddrinuse (e3b4e63)
test: update mcp-reporter test for daemon flag (d28a6d6)

Features

bot: add analyze-dependencies autogenerated (6c76d2c)
bot: add bot-feature-1786119322864 autogenerated (143d0cc)
bot: add calculate-code-smells autogenerated (b54c8a5)
bot: add compare-branches autogenerated (38660ab)
bot: add create-badge-svg autogenerated (a8df9d3)
bot: add detect-duplicate-code autogenerated (6eeae38)
bot: add export-pdf-report autogenerated (27ecf1d)
bot: add fetch-git-blame autogenerated (3caadb4)
bot: add generate-changelog autogenerated (f85e0be)
bot: add generate-csv-report autogenerated (cbfb0c2)
bot: add integrate-github-issues autogenerated (85ae8ee)
bot: add integrate-jira autogenerated (2ad63f7)
bot: add post-pr-comment autogenerated (ddca4ef)
bot: add send-slack-notification autogenerated (f913ab0)
bot: add send-teams-notification autogenerated (49e4af7)
bot: add track-test-flakiness autogenerated (b25ea3a)
bot: add trigger-webhook autogenerated (ba3c2b1)
bot: add upload-to-gcs autogenerated (0011af6)
bot: add upload-to-s3 autogenerated (9087abf)
bot: add validate-coverage-threshold autogenerated (002110b)
core: add export-json (1feb673)
core: add filter-by-branch (bd630a0)
core: add filter-by-status (0827ec6)
core: add search-explorer (9031faa)
core: add sort-explorer-files (8acb1d3)
history: implement search history logic (1556915)
mcp: add detect_equivalent_mutants tool (c478c01)
mcp: add generate_testing_cheat_sheet tool (f1490e5)
mcp: advanced git delta mutation execution (line ranges) (44a5c9d)
mcp: automated mutant context aggregation (expanded) (48098ac)

📸 Real Runtime Proof

Below are unedited runtime screenshots captured directly from active test executions:

⚡ How to Connect to Your AI Tool

Add this single JSON block to your MCP config:

{
  "mcpServers": {
    "stryker-mutation-testing": {
      "command": "npx",
      "args": ["-y", "--silent", "stryker-mcp-reporter"]
    }
  }
}

(Windows users: Use "command": "cmd.exe" with "args": ["/c", "npx", "-y", "--silent", "stryker-mcp-reporter"]).

Check out the full open-source project on GitHub: https://github.com/kluth/stryker-mcp-reporter

Announcing stryker-mcp-reporter v1.8.3: 100% Mutation Score & Native MCP for AI Coding Agents

Matthias Kluth — Wed, 05 Aug 2026 14:04:45 +0000

Standard code coverage measures execution, not test strength. AI coding assistants generate hundreds of lines of unit tests, but often fall into the "happy path bias".

With stryker-mcp-reporter v1.8.3, AI pair programmers (Antigravity, Cursor, Claude Desktop, Roo Code, Cline) can autonomously execute mutation tests, inspect survived mutants via Model Context Protocol (MCP), write exact edge-case tests, and achieve a verified 100% Mutation Score.

🌟 What's New in v1.8.3

Bug Fixes

announcements: prevent following 301 Hashnode redirects and log Hashnode Pro API policy clearly (1b9e901)

📸 Real Runtime Proof

Below are unedited runtime screenshots captured directly from active test executions:

⚡ How to Connect to Your AI Tool

Add this single JSON block to your MCP config:

{
  "mcpServers": {
    "stryker-mutation-testing": {
      "command": "npx",
      "args": ["-y", "--silent", "stryker-mcp-reporter"]
    }
  }
}

(Windows users: Use "command": "cmd.exe" with "args": ["/c", "npx", "-y", "--silent", "stryker-mcp-reporter"]).

Check out the full open-source project on GitHub: https://github.com/kluth/stryker-mcp-reporter

Announcing stryker-mcp-reporter v1.8.3: 100% Mutation Score & Native MCP for AI Coding Agents

Matthias Kluth — Wed, 05 Aug 2026 13:52:39 +0000

Standard code coverage measures execution, not test strength. AI coding assistants generate hundreds of lines of unit tests, but often fall into the "happy path bias".

🌟 What's New in v1.8.3

Bug Fixes

announcements: prevent following 301 Hashnode redirects and log Hashnode Pro API policy clearly (1b9e901)

📸 Real Runtime Proof

Below are unedited runtime screenshots captured directly from active test executions:

⚡ How to Connect to Your AI Tool

Add this single JSON block to your MCP config:

{
  "mcpServers": {
    "stryker-mutation-testing": {
      "command": "npx",
      "args": ["-y", "--silent", "stryker-mcp-reporter"]
    }
  }
}

(Windows users: Use "command": "cmd.exe" with "args": ["/c", "npx", "-y", "--silent", "stryker-mcp-reporter"]).

Check out the full open-source project on GitHub: https://github.com/kluth/stryker-mcp-reporter

Announcing stryker-mcp-reporter v1.8.2: 100% Mutation Score & Native MCP for AI Coding Agents

Matthias Kluth — Wed, 05 Aug 2026 13:32:47 +0000

Standard code coverage measures execution, not test strength. AI coding assistants generate hundreds of lines of unit tests, but often fall into the "happy path bias".

With stryker-mcp-reporter v1.8.2, AI pair programmers (Antigravity, Cursor, Claude Desktop, Roo Code, Cline) can autonomously execute mutation tests, inspect survived mutants via Model Context Protocol (MCP), write exact edge-case tests, and achieve a verified 100% Mutation Score.

🌟 What's New in v1.8.2

Bug Fixes

announcements: correct Hashnode PublishPostTagInput schema and log raw API responses (3305c2f)

📸 Real Runtime Proof

Below are unedited runtime screenshots captured directly from active test executions:

⚡ How to Connect to Your AI Tool

Add this single JSON block to your MCP config:

{
  "mcpServers": {
    "stryker-mutation-testing": {
      "command": "npx",
      "args": ["-y", "--silent", "stryker-mcp-reporter"]
    }
  }
}

(Windows users: Use "command": "cmd.exe" with "args": ["/c", "npx", "-y", "--silent", "stryker-mcp-reporter"]).

Check out the full open-source project on GitHub: https://github.com/kluth/stryker-mcp-reporter

Announcing stryker-mcp-reporter v1.8.0: 100% Mutation Score & Native MCP for AI Coding Agents

Matthias Kluth — Wed, 05 Aug 2026 13:24:30 +0000

Standard code coverage measures execution, not test strength. AI coding assistants generate hundreds of lines of unit tests, but often fall into the "happy path bias".

With stryker-mcp-reporter v1.8.0, AI pair programmers (Antigravity, Cursor, Claude Desktop, Roo Code, Cline) can autonomously execute mutation tests, inspect survived mutants via Model Context Protocol (MCP), write exact edge-case tests, and achieve a verified 100% Mutation Score.

🌟 What's New in v1.8.0

Features

announcements: add automated Git log changelog extractor and Hashnode v2/v1 dual publishing fallback (c54bb0c)
ci: add automated GitHub Discussions GraphQL mutation publishing and remove Reddit generation (683300c)

📸 Real Runtime Proof

Below are unedited runtime screenshots captured directly from active test executions:

⚡ How to Connect to Your AI Tool

Add this single JSON block to your MCP config:

{
  "mcpServers": {
    "stryker-mutation-testing": {
      "command": "npx",
      "args": ["-y", "--silent", "stryker-mcp-reporter"]
    }
  }
}

(Windows users: Use "command": "cmd.exe" with "args": ["/c", "npx", "-y", "--silent", "stryker-mcp-reporter"]).

Check out the full open-source project on GitHub: https://github.com/kluth/stryker-mcp-reporter