diff --git a/.github/plugin/marketplace.json b/.github/plugin/marketplace.json
index 89b12fcb..99413598 100644
--- a/.github/plugin/marketplace.json
+++ b/.github/plugin/marketplace.json
@@ -178,6 +178,12 @@
       "description": "Comprehensive resources for building Model Context Protocol servers using the official PHP SDK with attribute-based discovery, including best practices, project generation, and expert assistance",
       "version": "1.0.0"
     },
+    {
+      "name": "polyglot-test-agent",
+      "source": "./plugins/polyglot-test-agent",
+      "description": "Multi-agent pipeline for generating comprehensive unit tests across any programming language. Orchestrates research, planning, and implementation phases using specialized agents to produce tests that compile, pass, and follow project conventions.",
+      "version": "1.0.0"
+    },
     {
       "name": "power-apps-code-apps",
       "source": "./plugins/power-apps-code-apps",
diff --git a/docs/README.plugins.md b/docs/README.plugins.md
index 0b558723..d39032b3 100644
--- a/docs/README.plugins.md
+++ b/docs/README.plugins.md
@@ -44,6 +44,7 @@ Curated plugins of related prompts, agents, and skills organized around specific
 | [ospo-sponsorship](../plugins/ospo-sponsorship/README.md) | Tools and resources for Open Source Program Offices (OSPOs) to identify, evaluate, and manage sponsorship of open source dependencies through GitHub Sponsors, Open Collective, and other funding platforms. | 0 items |  |
 | [pcf-development](../plugins/pcf-development/README.md) | Complete toolkit for developing custom code components using Power Apps Component Framework for model-driven and canvas apps | 17 items | power-apps, pcf, component-framework, typescript, power-platform |
 | [php-mcp-development](../plugins/php-mcp-development/README.md) | Comprehensive resources for building Model Context Protocol servers using the official PHP SDK with attribute-based discovery, including best practices, project generation, and expert assistance | 3 items | php, mcp, model-context-protocol, server-development, sdk, attributes, composer |
+| [polyglot-test-agent](../plugins/polyglot-test-agent/README.md) | Multi-agent pipeline for generating comprehensive unit tests across any programming language. Orchestrates research, planning, and implementation phases using specialized agents to produce tests that compile, pass, and follow project conventions. | 10 items | testing, unit-tests, polyglot, test-generation, multi-agent, tdd, csharp, typescript, python, go |
 | [power-apps-code-apps](../plugins/power-apps-code-apps/README.md) | Complete toolkit for Power Apps Code Apps development including project scaffolding, development standards, and expert guidance for building code-first applications with Power Platform integration. | 3 items | power-apps, power-platform, typescript, react, code-apps, dataverse, connectors |
 | [power-bi-development](../plugins/power-bi-development/README.md) | Comprehensive Power BI development resources including data modeling, DAX optimization, performance tuning, visualization design, security best practices, and DevOps/ALM guidance for building enterprise-grade Power BI solutions. | 14 items | power-bi, dax, data-modeling, performance, visualization, security, devops, business-intelligence |
 | [power-platform-mcp-connector-development](../plugins/power-platform-mcp-connector-development/README.md) | Complete toolkit for developing Power Platform custom connectors with Model Context Protocol integration for Microsoft Copilot Studio | 4 items | power-platform, mcp, copilot-studio, custom-connector, json-rpc |
diff --git a/plugins/polyglot-test-agent/.github/plugin/plugin.json b/plugins/polyglot-test-agent/.github/plugin/plugin.json
new file mode 100644
index 00000000..30656b80
--- /dev/null
+++ b/plugins/polyglot-test-agent/.github/plugin/plugin.json
@@ -0,0 +1,68 @@
+{
+  "name": "polyglot-test-agent",
+  "description": "Multi-agent pipeline for generating comprehensive unit tests across any programming language. Orchestrates research, planning, and implementation phases using specialized agents to produce tests that compile, pass, and follow project conventions.",
+  "version": "1.0.0",
+  "author": {
+    "name": "Awesome Copilot Community"
+  },
+  "repository": "https://github.com/github/awesome-copilot",
+  "license": "MIT",
+  "tags": [
+    "testing",
+    "unit-tests",
+    "polyglot",
+    "test-generation",
+    "multi-agent",
+    "tdd",
+    "csharp",
+    "typescript",
+    "python",
+    "go"
+  ],
+  "display": {
+    "ordering": "alpha",
+    "show_badge": true
+  },
+  "items": [
+    {
+      "path": "agents/polyglot-test-generator.agent.md",
+      "kind": "agent"
+    },
+    {
+      "path": "agents/polyglot-test-researcher.agent.md",
+      "kind": "agent"
+    },
+    {
+      "path": "agents/polyglot-test-planner.agent.md",
+      "kind": "agent"
+    },
+    {
+      "path": "agents/polyglot-test-implementer.agent.md",
+      "kind": "agent"
+    },
+    {
+      "path": "agents/polyglot-test-builder.agent.md",
+      "kind": "agent"
+    },
+    {
+      "path": "agents/polyglot-test-tester.agent.md",
+      "kind": "agent"
+    },
+    {
+      "path": "agents/polyglot-test-fixer.agent.md",
+      "kind": "agent"
+    },
+    {
+      "path": "agents/polyglot-test-linter.agent.md",
+      "kind": "agent"
+    },
+    {
+      "path": "skills/polyglot-test-agent/unit-test-generation.prompt.md",
+      "kind": "prompt"
+    },
+    {
+      "path": "skills/polyglot-test-agent/SKILL.md",
+      "kind": "skill"
+    }
+  ]
+}
diff --git a/plugins/polyglot-test-agent/README.md b/plugins/polyglot-test-agent/README.md
new file mode 100644
index 00000000..28cc95b2
--- /dev/null
+++ b/plugins/polyglot-test-agent/README.md
@@ -0,0 +1,62 @@
+# Polyglot Test Agent Plugin
+
+Multi-agent pipeline for generating comprehensive unit tests across any programming language. Orchestrates research, planning, and implementation phases using specialized agents to produce tests that compile, pass, and follow project conventions.
+
+## Installation
+
+```bash
+# Using Copilot CLI
+copilot plugin install polyglot-test-agent@awesome-copilot
+```
+
+## What's Included
+
+### Agents
+
+| Agent | Description |
+|-------|-------------|
+| `polyglot-test-generator` | Orchestrates comprehensive test generation using Research-Plan-Implement pipeline. Use when asked to generate tests, write unit tests, improve test coverage, or add tests. |
+| `polyglot-test-researcher` | Analyzes codebases to understand structure, testing patterns, and testability. Identifies source files, existing tests, build commands, and testing framework. |
+| `polyglot-test-planner` | Creates structured test implementation plans from research findings. Organizes tests into phases by priority and complexity. |
+| `polyglot-test-implementer` | Implements a single phase from the test plan. Writes test files and verifies they compile and pass. |
+| `polyglot-test-builder` | Runs build/compile commands for any language and reports results. |
+| `polyglot-test-tester` | Runs test commands for any language and reports results. |
+| `polyglot-test-fixer` | Fixes compilation errors in source or test files. |
+| `polyglot-test-linter` | Runs code formatting/linting for any language. |
+
+### Commands (Slash Commands)
+
+| Command | Description |
+|---------|-------------|
+| `/polyglot-test-agent:unit-test-generation` | Best practices and guidelines for generating comprehensive, parameterized unit tests with 80% code coverage across any programming language |
+
+### Skills
+
+| Skill | Description |
+|-------|-------------|
+| `polyglot-test-agent` | Generates comprehensive, workable unit tests for any programming language using a multi-agent pipeline. Supports C#, TypeScript, JavaScript, Python, Go, Rust, Java, and more. |
+
+## Supported Languages
+
+- C# / .NET (MSTest, xUnit, NUnit)
+- TypeScript / JavaScript (Jest, Vitest, Mocha)
+- Python (pytest, unittest)
+- Go (testing)
+- Rust (cargo test)
+- Java (JUnit, Maven, Gradle)
+
+## How It Works
+
+The plugin coordinates specialized agents in a **Research → Plan → Implement** pipeline:
+
+1. **Research** — Analyzes the codebase to detect language, framework, testing patterns, and build commands
+2. **Plan** — Creates a phased implementation plan organized by priority and complexity
+3. **Implement** — Writes test files phase by phase, verifying compilation and test passage at each step
+
+## Source
+
+This plugin is part of [Awesome Copilot](https://github.com/github/awesome-copilot), a community-driven collection of GitHub Copilot extensions.
+
+## License
+
+MIT
diff --git a/plugins/polyglot-test-agent/agents/polyglot-test-builder.md b/plugins/polyglot-test-agent/agents/polyglot-test-builder.md
new file mode 100644
index 00000000..3f39f494
--- /dev/null
+++ b/plugins/polyglot-test-agent/agents/polyglot-test-builder.md
@@ -0,0 +1 @@
+../../../agents/polyglot-test-builder.agent.md
\ No newline at end of file
diff --git a/plugins/polyglot-test-agent/agents/polyglot-test-fixer.md b/plugins/polyglot-test-agent/agents/polyglot-test-fixer.md
new file mode 100644
index 00000000..11bda0d0
--- /dev/null
+++ b/plugins/polyglot-test-agent/agents/polyglot-test-fixer.md
@@ -0,0 +1 @@
+../../../agents/polyglot-test-fixer.agent.md
\ No newline at end of file
diff --git a/plugins/polyglot-test-agent/agents/polyglot-test-generator.md b/plugins/polyglot-test-agent/agents/polyglot-test-generator.md
new file mode 100644
index 00000000..09151b30
--- /dev/null
+++ b/plugins/polyglot-test-agent/agents/polyglot-test-generator.md
@@ -0,0 +1 @@
+../../../agents/polyglot-test-generator.agent.md
\ No newline at end of file
diff --git a/plugins/polyglot-test-agent/agents/polyglot-test-implementer.md b/plugins/polyglot-test-agent/agents/polyglot-test-implementer.md
new file mode 100644
index 00000000..07fbbce1
--- /dev/null
+++ b/plugins/polyglot-test-agent/agents/polyglot-test-implementer.md
@@ -0,0 +1 @@
+../../../agents/polyglot-test-implementer.agent.md
\ No newline at end of file
diff --git a/plugins/polyglot-test-agent/agents/polyglot-test-linter.md b/plugins/polyglot-test-agent/agents/polyglot-test-linter.md
new file mode 100644
index 00000000..c2eec9f4
--- /dev/null
+++ b/plugins/polyglot-test-agent/agents/polyglot-test-linter.md
@@ -0,0 +1 @@
+../../../agents/polyglot-test-linter.agent.md
\ No newline at end of file
diff --git a/plugins/polyglot-test-agent/agents/polyglot-test-planner.md b/plugins/polyglot-test-agent/agents/polyglot-test-planner.md
new file mode 100644
index 00000000..572cb1a8
--- /dev/null
+++ b/plugins/polyglot-test-agent/agents/polyglot-test-planner.md
@@ -0,0 +1 @@
+../../../agents/polyglot-test-planner.agent.md
\ No newline at end of file
diff --git a/plugins/polyglot-test-agent/agents/polyglot-test-researcher.md b/plugins/polyglot-test-agent/agents/polyglot-test-researcher.md
new file mode 100644
index 00000000..36c018fb
--- /dev/null
+++ b/plugins/polyglot-test-agent/agents/polyglot-test-researcher.md
@@ -0,0 +1 @@
+../../../agents/polyglot-test-researcher.agent.md
\ No newline at end of file
diff --git a/plugins/polyglot-test-agent/agents/polyglot-test-tester.md b/plugins/polyglot-test-agent/agents/polyglot-test-tester.md
new file mode 100644
index 00000000..aa2c72f6
--- /dev/null
+++ b/plugins/polyglot-test-agent/agents/polyglot-test-tester.md
@@ -0,0 +1 @@
+../../../agents/polyglot-test-tester.agent.md
\ No newline at end of file
diff --git a/plugins/polyglot-test-agent/commands/unit-test-generation.md b/plugins/polyglot-test-agent/commands/unit-test-generation.md
new file mode 100644
index 00000000..4ab97f22
--- /dev/null
+++ b/plugins/polyglot-test-agent/commands/unit-test-generation.md
@@ -0,0 +1 @@
+../../../skills/polyglot-test-agent/unit-test-generation.prompt.md
\ No newline at end of file
diff --git a/plugins/polyglot-test-agent/skills/polyglot-test-agent b/plugins/polyglot-test-agent/skills/polyglot-test-agent
new file mode 100644
index 00000000..c03dc1f6
--- /dev/null
+++ b/plugins/polyglot-test-agent/skills/polyglot-test-agent
@@ -0,0 +1 @@
+../../../skills/polyglot-test-agent
\ No newline at end of file