> ## Documentation Index
> Fetch the complete documentation index at: https://docs.jaasskills.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Error codes

> Error codes at a glance

| HTTP | Code                                         | Meaning                                                                               |
| ---- | -------------------------------------------- | ------------------------------------------------------------------------------------- |
| 409  | `DUPLICATE_PUBLISH`                          | Same `id@version` already exists                                                      |
| 400  | `MISSING_DEPENDENCY` / `CIRCULAR_DEPENDENCY` | Dependency graph doesn't resolve or has a cycle                                       |
| 400  | `CORRUPT_PAYLOAD`                            | Digest mismatch on the uploaded package                                               |
| 400  | `INVALID_SIGNATURE`                          | Signature fails trust-policy verification                                             |
| 400  | `GUARDRAIL_VIOLATION`                        | A mandatory (Level 1) content-safety rule fired                                       |
| 403  | `FORBIDDEN`                                  | Caller lacks the required scope or ownership                                          |
| 404  | `SKILL_NOT_FOUND`                            | Nonexistent id, or a private skill the caller can't see — indistinguishable by design |
| 503  | `GUARDRAILS_SERVICE_UNAVAILABLE`             | Guardrails scan couldn't run; only guardrail-dependent routes are affected            |