tpmjs-tool-creator - SKILL.md Agent Skill

name: tpmjs-tool-creator description: Guide for creating official TPMJS tools using the blocks CLI. Use when a user wants to create a new tool for the TPMJS registry, add a tool to packages/tools/official/, implement an AI SDK v6 tool, define a block in blocks.yml, validate a tool with `pnpm blocks run`, or publish a tool to npm with the tpmjs keyword.

TPMJS Tool Creator

Create production-ready tools for the TPMJS registry using the blocks CLI. Tools are npm packages following the AI SDK v6 pattern, validated by blocks, and automatically synced to tpmjs.com.

Workflow

Define the tool block in packages/tools/official/blocks.yml
Create the tool package directory
Implement the tool using AI SDK v6 tool() + jsonSchema()
Validate with pnpm blocks run <tool-name>
Build and publish to npm

Step 1: Define in blocks.yml

Add to the blocks: section of packages/tools/official/blocks.yml:

blocks:
  category.toolName:
    type: utility
    description: "LLM-friendly description of what the tool does"
    path: "tool-directory-name"
    domain_rules:
      - id: rule_name
        description: "What this implementation must do"
    inputs:
      - name: inputName
        type: string
        description: "Description for LLMs"
      - name: optionalInput
        type: number
        optional: true
        description: "Optional parameter"
    outputs:
      - name: result
        type: ResultType
        description: "What the tool returns"
        measures: [working_implementation, valid_output_structure, proper_error_handling, ai_sdk_compliance]

Category prefix (before the dot): research, web, data, documentation, engineering, security, statistics, ops, agent, sandbox, utilities, html, compliance, finance, legal, hr, marketing, cx, edu, sales.

For domain entities and quality measures, see references/domain.md.

Step 2: Create Package Directory

Create packages/tools/official/<tool-name>/:

<tool-name>/
├── package.json
├── tsconfig.json
├── tsup.config.ts
├── README.md
└── src/
    └── index.ts

package.json:

{
  "name": "@tpmjs/official-<tool-name>",
  "version": "0.1.0",
  "description": "Short description",
  "type": "module",
  "keywords": ["tpmjs", "<category>", "ai"],
  "exports": {
    ".": {
      "types": "./dist/index.d.ts",
      "default": "./dist/index.js"
    }
  },
  "files": ["dist"],
  "scripts": {
    "build": "tsup",
    "dev": "tsup --watch",
    "type-check": "tsc --noEmit",
    "clean": "rm -rf dist .turbo"
  },
  "devDependencies": {
    "@tpmjs/tsconfig": "workspace:*",
    "tsup": "^8.5.1",
    "typescript": "^5.9.3"
  },
  "dependencies": {
    "ai": "6.0.49"
  },
  "publishConfig": { "access": "public" },
  "repository": {
    "type": "git",
    "url": "https://github.com/tpmjs/tpmjs.git",
    "directory": "packages/tools/official/<tool-name>"
  },
  "homepage": "https://tpmjs.com",
  "license": "MIT",
  "tpmjs": {
    "category": "<category>",
    "frameworks": ["vercel-ai"],
    "tools": [
      {
        "name": "toolName",
        "description": "Clear description (20+ chars)."
      }
    ]
  }
}

tsconfig.json:

{
  "extends": "@tpmjs/tsconfig/react-library.json",
  "compilerOptions": { "outDir": "dist", "rootDir": "src" },
  "include": ["src/**/*.ts"],
  "exclude": ["node_modules", "dist"]
}

tsup.config.ts:

import { defineConfig } from 'tsup';

export default defineConfig({
  entry: ['src/index.ts'],
  format: ['esm'],
  dts: true,
  clean: true,
  sourcemap: true,
  target: 'es2022',
});

Step 3: Implement the Tool

Every tool follows this AI SDK v6 pattern in src/index.ts:

import { jsonSchema, tool } from 'ai';

interface MyToolInput {
  param1: string;
  param2?: number;
}

export interface MyToolResult {
  data: string;
  metadata: { processedAt: string };
}

export const myTool = tool({
  description: 'Clear LLM-friendly description of what this tool does.',
  parameters: jsonSchema<MyToolInput>({
    type: 'object',
    properties: {
      param1: {
        type: 'string',
        description: 'What param1 is for',
      },
      param2: {
        type: 'number',
        description: 'Optional: what param2 is for',
      },
    },
    required: ['param1'],
    additionalProperties: false,
  }),
  execute: async (input): Promise<MyToolResult> => {
    if (!input.param1) {
      throw new Error('param1 is required and must be non-empty');
    }

    try {
      const result = await processData(input.param1);
      return {
        data: result,
        metadata: { processedAt: new Date().toISOString() },
      };
    } catch (error) {
      throw new Error(
        `Failed to process: ${error instanceof Error ? error.message : String(error)}`
      );
    }
  },
});

export default myTool;

Hard rules:

No stubs, TODOs, or placeholders — every tool must be fully working
Single-shot: one call in, one structured result out
Validate inputs before processing
Try-catch with descriptive errors including context
additionalProperties: false on jsonSchema
Description on every schema property
Export as both named and default export
Output interface must be exported

Multi-Tool Packages

For packages with multiple tools, add root-level files:

block.ts:

import { toolA, toolB } from './src/index.js';
export const block = { name: 'package-name', tools: { toolA, toolB } };
export default block;

index.ts (root):

export * from './src/index.js';
export { default } from './src/index.js';

Each tool gets its own entry in blocks.yml (same path) and in tpmjs.tools array.

Step 4: Validate

The blocks CLI domain validator requires an OpenAI API key. Source it from .env.local before running:

cd packages/tools/official

# Load the OpenAI API key for domain validation
source ../../../.env.local
export OPENAI_API_KEY

pnpm blocks run <tool-name>            # Validate (schema → shape → domain)
pnpm blocks run <tool-name> --force    # Force full validation (skip cache)
pnpm blocks run <tool-name> --json     # JSON output for debugging
pnpm blocks run --all                  # Validate all tools

Common errors:

Tool "X" not found in exports → Export name must match blocks.yml
Required file not found → Check package root has all required files
invalid tpmjs field → Category must be valid, tools array required

Step 5: Build and Publish

pnpm --filter=@tpmjs/official-<tool-name> build
cd packages/tools/official/<tool-name> && npm publish --access public

The tool syncs to tpmjs.com automatically via the changes feed (every 2 min) and keyword search (every 15 min). To trigger immediately:

source apps/web/.env.local
curl -X POST https://tpmjs.com/api/sync/keyword \
  -H "Authorization: Bearer $CRON_SECRET"

README Template

Every tool needs a README:

# @tpmjs/official-<tool-name>

Short description.

## Installation

npm install @tpmjs/official-<tool-name>

## Usage

\`\`\`typescript
import { myTool } from '@tpmjs/official-<tool-name>';

const result = await myTool.execute({ param1: 'example' });
\`\`\`

## Parameters

| Name   | Type   | Required | Description        |
|--------|--------|----------|--------------------|
| param1 | string | Yes      | What param1 is for |

## Output

| Field | Type   | Description          |
|-------|--------|----------------------|
| data  | string | The processed result |

## License

MIT