Add Mastra system-prompt example wrapper

frameworks/mastra/system-prompt/.gitignore

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+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
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+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
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+*.tgz
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+.env
+.env.development.local
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+.vuepress/dist
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+.temp
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+.pnp.*
+
+# Agentuity
+.agentuity/

frameworks/mastra/system-prompt/README.md

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+# Mastra System Prompt Example - Agentuity Wrapper
+
+This example demonstrates how to wrap a Mastra agent that uses system prompts within Agentuity's structure. The agent implements a Harry Potter character agent that can respond as different characters from the wizarding world.
+
+## Overview
+
+This is a direct conversion of the [Mastra system-prompt example](https://mastra.ai/en/examples/agents/system-prompt) into an Agentuity agent wrapper. The implementation preserves ALL original Mastra framework code while adding Agentuity's wrapper structure.
+
+## Features
+
+- **Character-based responses**: The agent can respond as Harry Potter, Hermione Granger, or Ron Weasley
+- **System prompt demonstration**: Shows how Mastra's system prompts can change agent behavior
+- **Preserved framework code**: All original Mastra Agent creation and configuration is maintained
+- **Agentuity integration**: Proper error handling, logging, and response formatting
+
+## How it Works
+
+The agent uses Mastra's `Agent` class with system prompts to define character personalities and response styles. When a user makes a request, the agent:
+
+1. Receives input through Agentuity's `AgentRequest`
+2. Creates a Mastra `Agent` with character-specific instructions
+3. Generates a response using the original Mastra framework
+4. Returns the result through Agentuity's `AgentResponse`
+
+## Usage Examples
+
+- "Speak as Harry Potter and tell me about your first day at Hogwarts"
+- "Respond as Hermione and explain the importance of studying"
+- "Answer as Ron and describe your favorite Quidditch match"
+
+## Framework Preservation
+
+This wrapper maintains the original Mastra framework patterns:
+
+- Uses `@mastra/core/agent` for agent creation
+- Preserves the original `Agent` constructor with `name`, `model`, and `instructions`
+- Keeps the original `agent.generate()` method call
+- Maintains all Mastra-specific configuration and behavior
+
+## Development
+
+```bash
+# Install dependencies
+bun install
+
+# Run locally
+agentuity dev
+
+# Build
+agentuity build
+
+# Lint
+bun run lint
+
+# Format
+bun run format
+```
+
+## Dependencies
+
+- `@mastra/core`: Core Mastra framework
+- `@ai-sdk/anthropic`: Anthropic AI SDK for Claude models
+- `@agentuity/sdk`: Agentuity SDK for wrapper functionality
+
+This example demonstrates the proper way to wrap existing framework agents in Agentuity structure without modifying the original framework code.

frameworks/mastra/system-prompt/agentuity.yaml

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+# yaml-language-server: $schema=https://raw.githubusercontent.com/agentuity/cli/refs/heads/main/agentuity.schema.json
+
+# ------------------------------------------------
+# This file is generated by Agentuity
+# You should check this file into version control
+# ------------------------------------------------
+
+# The version semver range required to run this project
+version: '>=0.0.130'
+# The ID of the project which is automatically generated
+project_id: proj_mastra_system_prompt_example
+# The name of the project which is editable
+name: mastra-system-prompt
+# The description of the project which is editable
+description: "A Harry Potter character agent demonstrating Mastra's system prompt capabilities wrapped in Agentuity structure."
+# The development configuration for the project
+development:
+  # The port to run the development server on which can be overridden by setting the PORT environment variable
+  port: 3501
+  watch:
+    # Whether to watch for changes and automatically restart the server
+    enabled: true
+    # Rules for files to watch for changes
+    files:
+      - src/**
+  # The command to run the development server
+  command: bun
+  # The arguments to pass to the development server
+  args:
+    - run
+    - --silent
+    - .agentuity/index.js
+deployment:
+  command: bun
+  args:
+    - run
+    - --no-install
+    - --prefer-offline
+    - --silent
+    - --no-macros
+    - --no-global-search-paths
+    - --report-uncaught-exception
+    - --disable-sigusr1
+    - --disallow-code-generation-from-strings
+    - --no-addons
+    - --no-deprecation
+    - .agentuity/index.js
+  # You should tune the resources for the deployment
+  resources:
+    # The memory requirements
+    memory: 250Mi
+    # The CPU requirements
+    cpu: 500M
+    # The disk size requirements
+    disk: 100Mi
+# You should not need to change these value
+bundler:
+  enabled: true
+  identifier: bunjs
+  language: javascript
+  runtime: bunjs
+  agents:
+    dir: src/agents
+  ignore:
+    - node_modules/**
+    - dist/**
+    - src/**
+# The agents that are part of this project
+agents:
+  - # The ID of the Agent which is automatically generated
+    id: agent_harry_potter_system_prompt
+    # The name of the Agent which is editable
+    name: HarryPotterAgent

frameworks/mastra/system-prompt/biome.json

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+{
+  "$schema": "https://biomejs.dev/schemas/1.9.4/schema.json",
+  "vcs": {
+    "enabled": false,
+    "clientKind": "git",
+    "useIgnoreFile": false
+  },
+  "files": {
+    "ignoreUnknown": false,
+    "ignore": []
+  },
+  "formatter": {
+    "enabled": true,
+    "indentStyle": "space"
+  },
+  "organizeImports": {
+    "enabled": true
+  },
+  "linter": {
+    "enabled": true,
+    "rules": {
+      "recommended": false,
+      "correctness": {
+        "noUnusedVariables": "error"
+      },
+      "style": {
+        "useImportType": "error"
+      },
+      "suspicious": {
+        "noExplicitAny": "error"
+      }
+    }
+  },
+  "javascript": {
+    "formatter": {
+      "quoteStyle": "single"
+    }
+  }
+}