Generate SDK Types Skill

Purpose

Generates TypeScript type definitions for the SDK from Rust tool schemas, ensuring type safety between server and client.

CLAUDE.md Compliance

• ✅ Automated type generation (no manual sync)
• ✅ Validates type consistency
• ✅ Prevents type drift between Rust and TypeScript

Usage

Run this skill:

• After adding/modifying MCP tools
• After changing tool parameter schemas
• Before SDK releases
• After protocol changes

Prerequisites

• Bun runtime installed
• Pierre server must be runnable

• sdk/

  directory with dependencies installed

Commands

Standard Type Generation

# 1. Ensure server is running
cargo run --bin pierre-mcp-server &
SERVER_PID=$!
sleep 3

# 2. Generate TypeScript types
cd sdk
bun run generate-types

# 3. Verify types changed
git diff src/types.ts

# 4. Cleanup
kill $SERVER_PID
cd ..

One-Command Generation

# Run from project root (handles server lifecycle)
./scripts/generate-sdk-types.js

Manual Generation Process

# 1. Start server
cargo run --bin pierre-mcp-server &
SERVER_PID=$!
sleep 3

# 2. Fetch tool schemas via MCP
curl -X POST http://localhost:8081/mcp \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"tools/list","id":1}' \
  > /tmp/tools.json

# 3. Parse and generate types
cd sdk
node scripts/generate-types.js /tmp/tools.json

# 4. Format generated code
bun run format

# 5. Cleanup
kill $SERVER_PID
cd ..

Generated Type Structure

Tool Definitions

// Generated from Rust ToolDefinition structs
export interface Tool {
  name: string;
  description: string;
  inputSchema: {
    type: 'object';
    properties: Record<string, JsonSchema>;
    required?: string[];
  };
}

// Example: get_activities tool
export interface GetActivitiesParams {
  start_date?: string;
  end_date?: string;
  limit?: number;
  provider?: 'strava' | 'garmin' | 'fitbit';
}

Tool Registry

// All available tools
export const TOOLS: Tool[] = [
  {
    name: 'get_activities',
    description: 'Retrieves fitness activities...',
    inputSchema: { /* ... */ }
  },
  // ... 35+ tools
];

Type Validation

Pre-Generation Check

# Verify Rust tools compile
cargo build --lib

# Check tool count
rg "^pub const TOOL_" src/protocols/universal/tool_registry.rs --type rust | wc -l

Post-Generation Validation

# Verify types compile
cd sdk
bun run build

# Run type tests
bun test -- test/unit/types.test.ts

# Check type coverage
bun run type-check
cd ..

Diff Analysis

# Compare generated types with committed version
git diff sdk/src/types.ts

# Expected changes after adding a tool:
# + New tool interface
# + New tool definition in TOOLS array
# + Updated tool count comment

Type Generation Workflow

1. Add New Tool in Rust

// src/protocols/universal/tool_registry.rs
pub const TOOL_MY_NEW_FEATURE: ToolDefinition = ToolDefinition {
    name: "my_new_feature",
    description: "Does something useful",
    input_schema: json!({
        "type": "object",
        "properties": {
            "param1": { "type": "string" },
            "param2": { "type": "number" }
        },
        "required": ["param1"]
    }),
};

2. Register Tool

// src/protocols/universal/mod.rs
impl UniversalToolExecutor {
    pub fn register_tools(&mut self) {
        self.register(TOOL_MY_NEW_FEATURE, handle_my_new_feature);
    }
}

3. Generate TypeScript Types

cd sdk
bun run generate-types

4. Verify Generated Types

// sdk/src/types.ts (auto-generated)
export interface MyNewFeatureParams {
  param1: string;
  param2?: number;
}

export const TOOL_MY_NEW_FEATURE: Tool = {
  name: 'my_new_feature',
  description: 'Does something useful',
  inputSchema: { /* ... */ }
};

5. Commit Changes

git add src/protocols/universal/tool_registry.rs
git add sdk/src/types.ts
git commit -m "feat: add my_new_feature tool with TypeScript types"

Success Criteria

• ✅ TypeScript types match Rust tool definitions
• ✅ All tools have corresponding TypeScript interfaces
• ✅ Generated code compiles without errors
• ✅ Type tests pass
• ✅ No manual type definitions (all auto-generated)
• ✅ Git diff shows expected changes only

Related Files

• scripts/generate-sdk-types.js

  - Type generation script

• sdk/src/types.ts

  - Generated TypeScript types

• src/protocols/universal/tool_registry.rs

  - Rust tool definitions

• sdk/TYPE_GENERATION.md

  - Type generation documentation

Related Skills

• test-mcp-compliance

  - MCP protocol validation