Agent Skills › CloudAI-X/claude-workflow-v2 › convex-backend

convex-backend

GitHub

提供Convex后端开发指南，涵盖函数语法、类型验证、数据库Schema设计、查询与变更模式、定时任务及文件存储等最佳实践，辅助编写TypeScript后端代码。

skills/convex-backend/SKILL.md CloudAI-X/claude-workflow-v2

Trigger Scenarios

编写Convex查询或变更函数定义数据库Schema和验证器实现实时数据订阅设置定时任务或处理文件存储

Install

npx skills add CloudAI-X/claude-workflow-v2 --skill convex-backend -g -y

More Options

Use without installing

npx skills use CloudAI-X/claude-workflow-v2@convex-backend

指定 Agent (Claude Code)

npx skills add CloudAI-X/claude-workflow-v2 --skill convex-backend -a claude-code -g -y

安装 repo 全部 skill

npx skills add CloudAI-X/claude-workflow-v2 --all -g -y

预览 repo 内 skill

npx skills add CloudAI-X/claude-workflow-v2 --list

SKILL.md

Frontmatter

{
    "name": "convex-backend",
    "description": "Convex backend development guidelines. Use when writing Convex functions, schemas, queries, mutations, actions, or any backend code in a Convex project. Triggers on tasks involving Convex database operations, real-time subscriptions, file storage, or serverless functions."
}

Convex Backend Guidelines

When to Load

Trigger: Convex-specific development, writing Convex functions, schemas, queries, mutations, actions, or real-time subscriptions
Skip: Project does not use Convex as its backend

Comprehensive guide for building Convex backends with TypeScript. Covers function syntax, validators, schemas, queries, mutations, actions, scheduling, and file storage.

When to Apply

Reference these guidelines when:

Writing new Convex functions (queries, mutations, actions)
Defining database schemas and validators
Implementing real-time data fetching
Setting up cron jobs or scheduled functions
Working with file storage
Designing API structure

Rule Categories

Category	Impact	Description
Function Syntax	CRITICAL	New function syntax with args/returns/handler
Validators	CRITICAL	Type-safe argument and return validation
Schema Design	HIGH	Table definitions, indexes, system fields
Query Patterns	HIGH	Efficient data fetching with indexes
Mutation Patterns	MEDIUM	Database writes, patch vs replace
Action Patterns	MEDIUM	External API calls, Node.js runtime
Scheduling	MEDIUM	Crons and delayed function execution
File Storage	LOW	Blob storage and metadata

Quick Reference

Function Registration

// Public functions (exposed to clients)
import { query, mutation, action } from "./_generated/server";

// Internal functions (only callable from other Convex functions)
import {
  internalQuery,
  internalMutation,
  internalAction,
} from "./_generated/server";

Function Syntax (Always Use This)

export const myFunction = query({
  args: { name: v.string() },
  returns: v.string(),
  handler: async (ctx, args) => {
    return "Hello " + args.name;
  },
});

Common Validators

Type	Validator	Example
String	`v.string()`	`"hello"`
Number	`v.number()`	`3.14`
Boolean	`v.boolean()`	`true`
ID	`v.id("tableName")`	`doc._id`
Array	`v.array(v.string())`	`["a", "b"]`
Object	`v.object({...})`	`{name: "x"}`
Optional	`v.optional(v.string())`	`undefined`
Union	`v.union(v.string(), v.number())`	`"x"` or `1`
Literal	`v.literal("status")`	`"status"`
Null	`v.null()`	`null`

Function References

// Public functions
import { api } from "./_generated/api";
api.example.myQuery; // convex/example.ts → myQuery

// Internal functions
import { internal } from "./_generated/api";
internal.example.myInternalMutation;

Query with Index

// Schema
messages: defineTable({...}).index("by_channel", ["channelId"])

// Query
await ctx.db
  .query("messages")
  .withIndex("by_channel", (q) => q.eq("channelId", channelId))
  .order("desc")
  .take(10);