add-prompt

Context

Prompts use the prompt() builder from @cyanheads/mcp-ts-core. Each prompt lives in src/mcp-server/prompts/definitions/ with a .prompt.ts suffix and is registered into createApp() in src/index.ts. Some repos later add definitions/index.ts barrels; match the project's current pattern.

Prompts are pure message templates — no Context, no auth, no side effects.

For the full prompt() API, read node_modules/@cyanheads/mcp-ts-core/CLAUDE.md.

Steps

1. Ask the user for the prompt's name, purpose, and arguments
2. Create the file at src/mcp-server/prompts/definitions/{{prompt-name}}.prompt.ts
3. Register the prompt in the project's existing createApp() prompt list (directly in src/index.ts for fresh scaffolds, or via a barrel if the repo already has one)
4. Run bun run devcheck to verify

Template

/**
 * @fileoverview {{PROMPT_DESCRIPTION}}
 * @module mcp-server/prompts/definitions/{{PROMPT_NAME}}
 */

import { prompt, z } from '@cyanheads/mcp-ts-core';

export const {{PROMPT_EXPORT}} = prompt('{{prompt_name}}', {
  description: '{{PROMPT_DESCRIPTION}}',
  args: z.object({
    // All fields need .describe()
  }),
  generate: (args) => [
    {
      role: 'user',
      content: {
        type: 'text',
        text: `{{PROMPT_TEMPLATE_TEXT}}`,
      },
    },
  ],
});

Multi-message prompt

generate: (args) => [
  {
    role: 'user',
    content: {
      type: 'text',
      text: `Here is the ${args.type} to review:\n\n${args.content}`,
    },
  },
  {
    role: 'assistant',
    content: {
      type: 'text',
      text: 'I will analyze this carefully. Let me start with...',
    },
  },
],

Registration

// src/index.ts (fresh scaffold default)
import { createApp } from '@cyanheads/mcp-ts-core';
import { {{PROMPT_EXPORT}} } from './mcp-server/prompts/definitions/{{prompt-name}}.prompt.js';

await createApp({
  tools: [/* existing tools */],
  resources: [/* existing resources */],
  prompts: [{{PROMPT_EXPORT}}],
});

If the repo already uses src/mcp-server/prompts/definitions/index.ts, update that barrel instead.

Checklist

• File created at src/mcp-server/prompts/definitions/{{prompt-name}}.prompt.ts
• All Zod args fields have .describe() annotations
• JSDoc @fileoverview and @module header present
• generate function returns valid message array
• No side effects — prompts are pure templates
• Registered in the project's existing createApp() prompt list (directly or via barrel)
• bun run devcheck passes