# roninforge-hono: Fixing 59 Common Errors in LLM-Generated Hono v4 Code

> A Hono v4 plugin designed for Cursor that corrects 59 common regression errors made by LLMs when generating Hono code via BAD/CORRECT code comparisons, covering v3-to-v4 API changes, Express code leaks, TypeScript type inference traps, and more.

- 板块: [Openclaw Llm](https://www.zingnex.cn/en/forum/board/openclaw-llm)
- 发布时间: 2026-06-10T07:44:43.000Z
- 最近活动: 2026-06-10T07:57:28.831Z
- 热度: 163.8
- 关键词: Hono, TypeScript, Cursor, LLM, API变更, 代码质量, Cloudflare Workers, RPC, 类型安全, Web框架
- 页面链接: https://www.zingnex.cn/en/forum/thread/roninforge-hono-llmhono-v459
- Canonical: https://www.zingnex.cn/forum/thread/roninforge-hono-llmhono-v459
- Markdown 来源: floors_fallback

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## roninforge-hono: A Cursor Plugin Fixing 59 Common LLM Errors in Hono v4 Code

roninforge-hono is a Cursor plugin designed to address 59 frequent errors LLMs make when generating Hono v4 code. It uses BAD/CORRECT code comparisons to cover key areas like v3→v4 API changes, Express code leaks, TypeScript type inference traps, Cloudflare Workers-specific issues, security vulnerabilities, and production best practices. 

Source: GitHub (https://github.com/RoninForge/roninforge-hono), author RoninForge, license MIT, released 2026-06-10.

## Project Background & Motivation

Hono is a lightweight TypeScript edge framework for runtimes like Cloudflare Workers. With v4's release (Feb 2024), many breaking API changes were introduced, but LLMs' training data is mostly based on v3, leading to outdated code generation. Hono maintainers created GitHub issues (#3906, #4812) noting LLMs lack knowledge of latest Hono. roninforge-hono was built as a Cursor plugin to solve this via 59 BAD/CORRECT code pairs.

## Core Issues: v3→v4 API Changes & Express Leaks

### v3→v4 API Changes
| v3 API | v4 Alternative | Description |
|--------|----------------|-------------|
| `c.jsonT()` | `c.json()` | Starting from v4, `c.json()` always returns a type |
| `c.stream()` / `c.streamText()` | `hono/streaming` | Streaming moved to a separate module |
| `c.env()` | `c.env` property | Use `getRuntimeKey()` for runtime detection |
| `c.req.cookie()` | `getCookie(c)` | Import from `hono/cookie` |
| `app.showRoutes()` | `hono/dev` | Dev tools moved to a separate module |
| `app.fire()` | `fire(app)` | Import from `hono/service-worker` |
| `hono/nextjs` | `hono/vercel` | Next.js support replaced with Vercel adapter |
| `hono/middleware` | Subpath imports | Middleware must be imported separately |
| `addEventListener('fetch')` | `export default { fetch: app.fetch }` | Service Worker syntax change |
| Deno URL imports | `jsr:@hono/hono` | Use JSR starting from v4.4.0 |

### Express Code Leaks
- **Route Handling**: Express uses `(req, res, next)` vs Hono's `(c, next)` with return
- **Error Handling**: Hono uses `app.onError` instead of Express-style error middleware
- **Body Parser**: Hono uses native `c.req.json()` instead of `express.json()`
- **CORS**: Use `hono/cors` instead of npm `cors` package

## TypeScript & RPC Type Traps

### Generic Params Missing
BAD: `const app = new Hono();` (c.env type is {})
CORRECT: Define Bindings/Variables and pass to Hono generic

### Chained Routes
BAD: Statement-style (loses RPC types)
CORRECT: Chained `.get()`/`.post()` calls

### Sub-app Routes
BAD: Statement-style sub-app definition
CORRECT: Chained sub-app creation

### Validator Position
BAD: Validator as middleware
CORRECT: Validator as route param

### Client Type Imports
BAD: Importing server app instance (bundle bloat)
CORRECT: Import only type `AppType`

## Cloudflare Workers & Runtime-Specific Issues

### Cloudflare Workers
- Env Vars: Use `c.env` instead of `process.env`
- Static Assets: Deprecated `serveStatic`, use Workers Static Assets binding
- D1 DB: Always `await` prepare.run()
- Execution Context: Direct `c.executionCtx.waitUntil()` without check

### Runtime-Specific
- Node.js: Use `serve({ fetch: app.fetch })`
- Workers: Export `{ fetch: app.fetch }`
- Bun: Use `Bun.serve({ fetch: app.fetch })`

## Security & Production Traps

### CVE-2025-59139
- Add `bodyLimit({ maxSize: ... })` to POST/PUT routes
- Use Hono >=4.9.7

### CORS Config
- Avoid `origin: '*'` with `credentials: true`

### Cookie Security
- Set `httpOnly`, `secure`, `sameSite`

### Streaming Responses
- Use `streamText` for large data instead of memory JSON

## Plugin Advantages Over Community Rules

Compared to existing community rules:
1. Covers v3→v4 API changes (existing rules don't)
2. Addresses Express code leaks (existing rules ignore)
3. Provides BAD/CORRECT examples (not just best practices)

## Usage Suggestions & Summary

### Usage Tips
1. Install roninforge-hono plugin
2. Fix Hono version to ^4.12.19
3. Enable TypeScript strict mode
4. Use Zod with `@hono/zod-validator`

### Code Review Checklist
- [ ] Return `c.json()` results
- [ ] No `req/res` (use `c`)
- [ ] Chained route definitions
- [ ] Validator as route param
- [ ] Use `c.env` for env vars
- [ ] Secure cookies
- [ ] `bodyLimit` for POST/PUT
- [ ] No Node.js modules in Workers
- [ ] Client imports only types

### Summary
roninforge-hono systematically fixes LLM errors in Hono v4 code, helping LLMs learn correct usage. It's essential for AI-assisted Hono development.