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auth0-custom-domains

Use when setting up, verifying, or troubleshooting a custom Auth0 login domain (e.g. login.example.com). Covers CNAME setup, verification, TLS policy, Multiple Custom Domains, and Management API errors — even if the user just says "use my own domain for Auth0 login".

94

1.60x
Quality

92%

Does it follow best practices?

Impact

98%

1.60x

Average score across 3 eval scenarios

SecuritybySnyk

Low

Low-risk findings worth noting

SKILL.md
Quality
Evals
Security

Quality

Content

85%Weight 40%Scale 1-3

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

The body is a well-structured lobby file with strong actionability, clear validation-gated workflows, and excellent progressive disclosure into one-level-deep reference files. Its only weakness is mild verbosity from meta-narration about its own design and some repetition of the Free-tier 403 guidance.

Suggestions

Trim the capability-design philosophy paragraphs in the Overview ("This skill is capability-based, not step-based..." and "The capability design matches how users actually come to...") to a single sentence; the capabilities table already conveys the structure.

Condense the Interaction style section — collapse the two example text blocks into one or state the rule inline — since the numbered-list and single-question patterns are self-evident.

Consolidate the Free-tier 403 / credit-card-on-file guidance so it lives once (error table or prerequisites) and the other mentions just link to it, removing the duplicated explanation.

DimensionReasoningScore

Conciseness

The body is information-dense and Auth0-specific (no basic-concept explanations), but the capability-design philosophy narration ("This skill is capability-based, not step-based...", "The capability design matches how users actually come to...") and the verbose Interaction style section with two example text blocks could be tightened, and the Free-tier 403 / credit-card point is repeated across the error table, prerequisites, and Common Mistakes.

2 / 3

Actionability

Provides copy-paste-ready commands (auth0 tenants list, auth0 tenants use <name>, auth0 domains list, aws sts get-caller-identity, az account show, claude mcp add ...) and a concrete error-code table with specific dashboard paths, CLI commands, and API fields, plus exact valid values for custom_client_ip_header.

3 / 3

Workflow Clarity

Cross-cutting workflow is well-sequenced with explicit validation feedback loops: check active tenant before the first CLI command, surface and confirm it, stop and run auth0 tenants use if wrong, re-confirm, and require explicit confirmation before mutating (create/PATCH/delete) calls; the error-code triage is ordered ("CHECK THIS FIRST") with a safe read-only starter capability.

3 / 3

Progressive Disclosure

Exemplary lobby structure: a capabilities table routes to five dedicated capability reference files, with a providers.md router into per-provider sub-files (cloudflare.md, route53.md, azure-dns.md, manual.md) plus api.md, advanced.md, and examples.md; all referenced anchor links resolve to real headings and navigation is clearly signaled with a References section and instructions to open only the matching sub-file.

3 / 3

Total

11

/

12

Passed

Description

100%Weight 40%Scale 1-3

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

The description is specific, uses natural trigger language with an explicit "Use when" clause, and is clearly niched to Auth0 custom domains. It answers both what the skill does and when to invoke it without verbosity or over-claiming.

DimensionReasoningScore

Specificity

Lists multiple concrete actions and sub-areas — "setting up, verifying, or troubleshooting a custom Auth0 login domain" plus "CNAME setup, verification, TLS policy, Multiple Custom Domains, and Management API errors" — matching the anchor for listing several specific concrete actions.

3 / 3

Completeness

Explicitly answers both what ("Covers CNAME setup, verification, TLS policy, Multiple Custom Domains, and Management API errors") and when (an explicit "Use when..." clause with trigger variants), so it is not capped at 2.

3 / 3

Trigger Term Quality

Includes natural user phrasings ("setting up", "verifying", "troubleshooting", "use my own domain for Auth0 login") and a concrete example hostname, giving good coverage of terms a user would actually say.

3 / 3

Distinctiveness Conflict Risk

Narrowly niched to Auth0 custom domains with domain-specific triggers (CNAME, Multiple Custom Domains, Management API errors), making it unlikely to fire for unrelated skills.

3 / 3

Total

12

/

12

Passed

Validation

93%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation15 / 16 Passed

Validation for skill structure

CriteriaDescriptionResult

metadata_field

'metadata' should map string keys to string values

Warning

Total

15

/

16

Passed

Repository
auth0/agent-skills
Reviewed

Table of Contents

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