ziglana · Copilot · Dec 23, 2025 · Feb 16, 2026
diff --git a/.devwork/plan.md b/.devwork/plan.md
diff --git a/.devwork/plan_response.txt b/.devwork/plan_response.txt
diff --git a/.devwork/prompt.txt b/.devwork/prompt.txt
@@ -0,0 +1,89 @@
+# PR #23: [WIP] Add support for MCP compatibility
+
+## Description
+Thanks for assigning this issue to me. I'm starting to work on it and will keep this PR's description up to date as I form a plan and make progress.
+
+<!-- START COPILOT ORIGINAL PROMPT -->
+
+
+
+<details>
+
+<summary>Original prompt</summary>
+
+> 
+> ----
+> 
+> *This section details on the original issue you should resolve*
+> 
+> <issue_title>implement MCP</issue_title>
+> <issue_description>add support of MCP, schema: https://github.com/modelcontextprotocol/modelcontextprotocol/blob/main/schema/2025-11-25/schema.ts
+> 
+> example of rust sdk: https://github.com/modelcontextprotocol/rust-sdk</issue_description>
+> 
+> <agent_instructions>mcp must be fully compatable with claude</agent_instructions>
+> 
+> ## Comments on the Issue (you are @copilot in this section)
+> 
+> <comments>
+> </comments>
+> 
+
+
+</details>
+
+
+
+<!-- START COPILOT CODING AGENT SUFFIX -->
+
+- Fixes ziglana/gRPC-zig#22
+
+<!-- START COPILOT CODING AGENT TIPS -->
+---
+
+💬 We'd love your input! Share your thoughts on Copilot coding agent in our [2 minute survey](https://gh.io/copilot-coding-agent-survey).
+
+
+## Task
+Thanks for assigning this issue to me. I'm starting to work on it and will keep this PR's description up to date as I form a plan and make progress.
+
+<!-- START COPILOT ORIGINAL PROMPT -->
+
+
+
+<details>
+
+<summary>Original prompt</summary>
+
+> 
+> ----
+> 
+> *This section details on the original issue you should resolve*
+> 
+> <issue_title>implement MCP</issue_title>
+> <issue_description>add support of MCP, schema: https://github.com/modelcontextprotocol/modelcontextprotocol/blob/main/schema/2025-11-25/schema.ts
+> 
+> example of rust sdk: https://github.com/modelcontextprotocol/rust-sdk</issue_description>
+> 
+> <agent_instructions>mcp must be fully compatable with claude</agent_instructions>
+> 
+> ## Comments on the Issue (you are @copilot in this section)
+> 
+> <comments>
+> </comments>
+> 
+
+
+</details>
+
+
+
+<!-- START COPILOT CODING AGENT SUFFIX -->
+
+- Fixes ziglana/gRPC-zig#22
+
+<!-- START COPILOT CODING AGENT TIPS -->
+---
+
+💬 We'd love your input! Share your thoughts on Copilot coding agent in our [2 minute survey](https://gh.io/copilot-coding-agent-survey).
+
diff --git a/.devwork/research/summary.md b/.devwork/research/summary.md
@@ -0,0 +1,176 @@
+# Research Summary
+
+## Prompt
+# PR #23: [WIP] Add support for MCP compatibility
+
+## Description
+Thanks for assigning this issue to me. I'm starting to work on it and will keep this PR's description up to date as I form a plan and make progress.
+
+<!-- START COPILOT ORIGINAL PROMPT -->
+
+
+
+<details>
+
+<summary>Original prompt</summary>
+
+> 
+> ----
+> 
+> *This section details on the original issue you should resolve*
+> 
+> <issue_title>implement MCP</issue_title>
+> <issue_description>add support of MCP, schema: https://github.com/modelcontextprotocol/modelcontextprotocol/blob/main/schema/2025-11-25/schema.ts
+> 
+> example of rust sdk: https://github.com/modelcontextprotocol/rust-sdk</issue_description>
+> 
+> <agent_instructions>mcp must be fully compatable with claude</agent_instructions>
+> 
+> ## Comments on the Issue (you are @copilot in this section)
+> 
+> <comments>
+> </comments>
+> 
+
+
+</details>
+
+
+
+<!-- START COPILOT CODING AGENT SUFFIX -->
+
+- Fixes ziglana/gRPC-zig#22
+
+<!-- START COPILOT CODING AGENT TIPS -->
+---
+
+💬 We'd love your input! Share your thoughts on Copilot coding agent in our [2 minute survey](https://gh.io/copilot-coding-agent-survey).
+
+
+## Task
+Thanks for assigning this issue to me. I'm starting to work on it and will keep this PR's description up to date as I form a plan and make progress.
+
+<!-- START COPILOT ORIGINAL PROMPT -->
+
+
+
+<details>
+
+<summary>Original prompt</summary>
+
+> 
+> ----
+> 
+> *This section details on the original issue you should resolve*
+> 
+> <issue_title>implement MCP</issue_title>
+> <issue_description>add support of MCP, schema: https://github.com/modelcontextprotocol/modelcontextprotocol/blob/main/schema/2025-11-25/schema.ts
+> 
+> example of rust sdk: https://github.com/modelcontextprotocol/rust-sdk</issue_description>
+> 
+> <agent_instructions>mcp must be fully compatable with claude</agent_instructions>
+> 
+> ## Comments on the Issue (you are @copilot in this section)
+> 
+> <comments>
+> </comments>
+> 
+
+
+</details>
+
+
+
+<!-- START COPILOT CODING AGENT SUFFIX -->
+
+- Fixes ziglana/gRPC-zig#22
+
+<!-- START COPILOT CODING AGENT TIPS -->
+---
+
+💬 We'd love your input! Share your thoughts on Copilot coding agent in our [2 minute survey](https://gh.io/copilot-coding-agent-survey).
+
+
+
+## Findings
+## Research Summary: Adding MCP Support to gRPC-zig
+
+### Project Overview
+- **Project**: gRPC-zig - A blazingly fast gRPC client & server implementation in Zig
+- **Zig Version**: 0.15.2
+- **Language**: Pure Zig (zero dependencies)
+- **Location**: `/tmp/claudev-pr-95466`
+
+### Project Structure
+```
+/tmp/claudev-pr-95466/
+├── build.zig, build.zig.zon     # Zig build configuration
+├── src/
+│   ├── client.zig               # gRPC client implementation
+│   ├── server.zig               # gRPC server implementation
+│   ├── transport.zig            # Transport layer
+│   ├── http2/                   # HTTP/2 protocol implementation
+│   ├── proto/                   # Protocol buffer handling
+│   ├── features/                # Features (auth, compression, streaming, health)
+│   └── tests.zig, benchmark.zig
+├── examples/                    # Example implementations
+└── integration_test/
+```
+
+### MCP (Model Context Protocol) Overview
+
+**MCP is a JSON-RPC 2.0 based protocol** for AI assistants to interact with tools and resources. Key points:
+
+1. **Protocol Version**: 2025-11-25 (latest) or 2025-06-18
+2. **Transport**: stdio or HTTP with SSE (Server-Sent Events)
+3. **Message Types**:
+   - `JSONRPCRequest` - expects response (has `id`)
+   - `JSONRPCNotification` - no response expected (no `id`)
+   - `JSONRPCResponse` - successful response
+   - `JSONRPCErrorResponse` - error response
+
+4. **Core Methods**:
+   - `initialize` - Client/server handshake with capabilities
+   - `notifications/initialized` - Client confirmation
+   - `ping` - Keepalive/liveness check
+   - `tools/list`, `tools/call` - Tool operations
+   - `resources/list`, `resources/read`, `resources/subscribe` - Resource operations
+   - `prompts/list`, `prompts/get` - Prompt templates
+   - `sampling/createMessage` - LLM sampling
+
+5. **Standard Error Codes**:
+   - `-32700` - Parse error
+   - `-32600` - Invalid request
+   - `-32601` - Method not found
+   - `-32602` - Invalid params
+   - `-32603` - Internal error
+
+### Implementation Requirements
+
+To make MCP compatible with Claude:
+
+1. **JSON-RPC 2.0 Compliance**: Must properly handle both requests and notifications
+2. **Initialization Handshake**: 
+   - Server responds to `initialize` with `ServerCapabilities`
+   - Client sends `notifications/initialized` after receiving capabilities
+3. **Capability Negotiation**: Both client and server declare their capabilities
+4. **Transport Options**: 
+   - stdio (common for local tools)
+   - HTTP with SSE (for web-based servers)
+
+### Key Gotchas
+
+1. **Notification vs Request**: Notifications have no `id` field, requests have an `id`
+2. **Progress Tokens**: Can be used for long-running operations with `notifications/progress`
+3. **Content Types**: MCP uses its own content block types (TextContent, ImageContent, BlobResourceContents, EmbeddedResource)
+4. **Progress Token**: Either string or number type
+
+### Recommended Implementation Approach
+
+Since gRPC-zig already provides HTTP/2 infrastructure, you could:
+1. Add an MCP layer on top that handles JSON-RPC messaging
+2. Reuse HTTP/2 transport for the transport layer
+3. Implement the core methods (initialize, ping, tools, resources, prompts)
+4. Ensure proper capability negotiation
+
+The MCP implementation would be a new module that wraps or integrates with the existing gRPC server/client infrastructure, translating between JSON-RPC messages and the internal gRPC-zig types.
diff --git a/.devwork/result.json b/.devwork/result.json
@@ -0,0 +1,10 @@
+{
+  "success": true,
+  "tasks_total": 7,
+  "tasks_completed": 7,
+  "tasks_failed": 0,
+  "planning_ms": 248129,
+  "execution_ms": 40329,
+  "total_ms": 288569,
+  "error": ""
+}
diff --git a/.devwork/tree-after.txt b/.devwork/tree-after.txt
@@ -0,0 +1,53 @@
+# Directory snapshot after SpecKit execution
+
+/tmp/claudev-pr-95466
+├── build.zig
+├── build.zig.zon
+├── docs
+│   └── benchmarking.md
+├── examples
+│   ├── auth.zig
+│   ├── basic_client.zig
+│   ├── basic_server.zig
+│   ├── compression.zig
+│   ├── health.zig
+│   ├── http2_transport.zig
+│   ├── mcp_server.zig
+│   └── streaming.zig
+├── integration_test
+│   ├── proto.zig
+│   ├── README.md
+│   ├── requirements.txt
+│   ├── run_tests.sh
+│   ├── test_client.py
+│   ├── test_server.zig
+│   └── test_service.proto
+├── LICENSE
+├── README.md
+├── scripts
+│   └── run_benchmark.sh
+└── src
+    ├── benchmark.zig
+    ├── client.zig
+    ├── features
+    │   ├── auth.zig
+    │   ├── compression.zig
+    │   ├── health.zig
+    │   └── streaming.zig
+    ├── http2
+    │   ├── connection.zig
+    │   ├── frame.zig
+    │   ├── hpack.zig
+    │   └── stream.zig
+    ├── mcp
+    │   ├── server.zig
+    │   ├── transport.zig
+    │   └── types.zig
+    ├── mcp.zig
+    ├── proto
+    │   └── service.zig
+    ├── server.zig
+    ├── tests.zig
+    └── transport.zig
+
+10 directories, 39 files
diff --git a/.devwork/tree.txt b/.devwork/tree.txt
@@ -0,0 +1,48 @@
+# Directory snapshot before SpecKit execution
+# 1771270859044551889
+
+/tmp/claudev-pr-95466
+├── build.zig
+├── build.zig.zon
+├── docs
+│   └── benchmarking.md
+├── examples
+│   ├── auth.zig
+│   ├── basic_client.zig
+│   ├── basic_server.zig
+│   ├── compression.zig
+│   ├── health.zig
+│   ├── http2_transport.zig
+│   └── streaming.zig
+├── integration_test
+│   ├── proto.zig
+│   ├── README.md
+│   ├── requirements.txt
+│   ├── run_tests.sh
+│   ├── test_client.py
+│   ├── test_server.zig
+│   └── test_service.proto
+├── LICENSE
+├── README.md
+├── scripts
+│   └── run_benchmark.sh
+└── src
+    ├── benchmark.zig
+    ├── client.zig
+    ├── features
+    │   ├── auth.zig
+    │   ├── compression.zig
+    │   ├── health.zig
+    │   └── streaming.zig
+    ├── http2
+    │   ├── connection.zig
+    │   ├── frame.zig
+    │   ├── hpack.zig
+    │   └── stream.zig
+    ├── proto
+    │   └── service.zig
+    ├── server.zig
+    ├── tests.zig
+    └── transport.zig
+
+9 directories, 34 files