vf-error-handling SKILL.md skillA
vf-error-handling from veryfront/veryfront-code is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add veryfront/veryfront-code/vf-error-handling@git:20260320.9b86116Pins git:20260320.9b86116 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- veryfront/veryfront-code
- Path
.claude/skills/vf-error-handling/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260320.9b86116, committed Mar 20, 2026
- Size
- 4,305 bytes
- Repository stars
- 20
- License
- Apache-2.0
Use when creating new errors, migrating error classes to registry, catching/handling errors, or working with the VeryfrontError system.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Veryfront Error Handling
## Overview
Veryfront uses a centralized error registry with slug-based identification. All errors extend `VeryfrontError` and are created via `defineError()`.
**Core principle:** Never throw raw `Error`. Use the registry. Never identify errors by class name. Use slugs.
## Error Registry Pattern
### Defining New Errors
```typescript
// In src/errors/error-registry.ts
import { defineError } from "./types.ts";
export const MY_NEW_ERROR = defineError({
slug: "my-new-error", // kebab-case, unique
category: "RUNTIME", // CONFIG | BUILD | RUNTIME | ROUTE | MODULE | SERVER | BOUNDARY | DEV | DEPLOY | AGENT | GENERAL
status: 500, // default HTTP status
title: "Something went wrong", // human-readable
suggestion: "Try doing X instead", // actionable fix
});
```
### Throwing Errors
```typescript
import { MY_NEW_ERROR } from "#veryfront/errors";
throw MY_NEW_ERROR.create({
detail: "Specific description of what happened",
context: { key: "value", relevantData: data },
cause: originalError, // optional: chain the original error
});
```
### Catching Errors
```typescript
…Read the whole file at its exact version.
How to install
mdr add veryfront/veryfront-code/vf-error-handling@sha256:8ef54cba13ad9753The line at the top of this page pins the label git:20260320.9b86116, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_ygubviptmdxnejzs)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Mar 20, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (4305 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
veryfront/veryfront-code · 20 stars · license Apache-2.0 · pushed 2026-10-31 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_ygubviptmdxnejzs GET https://markdownregistry.com/api/v1/resolve?ref=veryfront/veryfront-code/vf-error-handling GET https://markdownregistry.com/api/v1/blob/8ef54cba13ad97532890f94696d94d0e3ad646693d14b7451ce1cad1014df77e
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.