Generate SDK Types Skill

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