explain-error SKILL.md skillA
explain-error from smicolon/ai-kit is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add smicolon/ai-kit/explain-error@v1.0.0Pins v1.0.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- smicolon/ai-kit
- Path
packs/better-auth/skills/explain-error/SKILL.md- Versions recorded
- 1
- Latest version
- v1.0.0, committed Sep 3, 2026
- Size
- 3,761 bytes
- Repository stars
- 7
- License
- MIT
Automatically diagnoses, explains, and resolves Better Auth runtime errors, configuration issues, database adapter mismatches, and authentication failure codes.
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
# Better Auth Error Diagnostician & Explainer
This skill diagnoses and provides actionable resolutions for common Better Auth runtime errors, client error codes, configuration pitfalls, and database adapter issues.
## Common Error Codes & Resolutions
### 1. `INVALID_EMAIL_OR_PASSWORD`
- **Cause**: User credentials do not match database records, or password hashing mismatch.
- **Resolution**:
- Verify that password hashing algorithm has not changed between migrations.
- Verify that input email is trimmed/lowercased if `emailAndPassword.autoSignIn` or normalization is enabled.
- Check client-side error handling:
```typescript
const { data, error } = await authClient.signIn.email({
email,
password,
})
if (error?.status === 401 || error?.code === 'INVALID_EMAIL_OR_PASSWORD') {
// Prompt user with user-friendly message
}
```
### 2. `USER_ALREADY_EXISTS`
- **Cause**: Attempting to sign up with an email or account ID already in use.
- **Resolution**:
- Direct user to sign in or password reset flow.
- If social login is used with existing email, check `accountLinking.enabled`:
```typescript
export const auth = betterAuth({
…Read the whole file at its exact version.
How to install
mdr add smicolon/ai-kit/explain-error@sha256:2fb12603f46df3a5The line at the top of this page pins the label v1.0.0, 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_tnybolsh5y2uxdaf)
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Versions
The registry has recorded 1 version of this file, committed on Sep 3, 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 (3761 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
smicolon/ai-kit · 7 stars · license MIT · pushed 2026-09-15 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_tnybolsh5y2uxdaf GET https://markdownregistry.com/api/v1/resolve?ref=smicolon/ai-kit/explain-error GET https://markdownregistry.com/api/v1/blob/2fb12603f46df3a5893f057681c9f04dd3509da66af5ada8ef89ae1fd968fe8e
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.